APM Volvo Fh4

————————————————————————————————————————————————————————————

C100601

“Failure is set if the sensor shorted to ground.

Failure is set if the sensor shorted to power supply.”

General Electrical Failure

Circuit #1 pressure information will not available.

“- damage of the sensor wiring

– damage of the sensor or

– damage of the ECU”

Diagnostic Service 14. No additional action is needed.

– Check pressure in Air supply circuit 1 by manometer. Pressure should be <12.6b.

– If overpressure is measured, replace APM.

Air supply circuit 1 pressure sensor

————————————————————————————————————————————————————————————

C100701

“Failure is set if the sensor shorted to ground.

Failure is set if the sensor shorted to power supply.”

General Electrical Failure

Circuit #2 pressure information will not available.

“- damage of the sensor wiring

– damage of the sensor or

– damage of the ECU”

Diagnostic Service 14. No additional action is needed.

– Check pressure in Air supply circuit 2 by manometer. Pressure should be <12.6b.

– If overpressure is measured, replace APM.

Air supply circuit 2 pressure sensor

————————————————————————————————————————————————————————————

U300041

“Drive software checksum is wrong Flash, NVM checksum is wrong.”

General Checksum Failure

Pneumatic backup air management control (idle cut-off, no regeneration) No EPB functions Pneumatic backup release and apply of PB is possible No CAN and LIN communication.

No ParkBrakeActuationStatus.

“- Demage of the flash and/or flash content

– Last drive software download faild

– Damage of the eeprom of the ECU”

Diagnostic Service 14. No additional action is needed.

– download SW and datasets

– Replace APM

Electronic control unit

————————————————————————————————————————————————————————————

U300044

“At least one dataset parameter out of range or relation error among parameters.

Data Memory Failure

Pneumatic backup air management control (idle cut-off, no regeneration) No EPB functions Pneumatic backup release and apply of PB is possible No CAN and LIN communication.

No ParkBrakeActuationStatus.

– Incorrect/Unrealistic data written into APM

– Dataset damage

Diagnostic Service 14. No additional action is needed.

– Download dataset

– Execute Restore supplier data memory area routine

– Check the improper parameters and their writing times. If it happened after parameter set up then do the programming again, if not then replace the sample.

– Replace APM

Electronic control unit

Node

DTC ISO

FailureEvent

FTB_Name

FunctBehaviorDesc

PossibleRootCause

ProcedureEraseConfirmedDtc

ProposedWorkshopAction

ProprietaryName

————————————————————————————————————————————————————————————

U300045

Boot strap loader (BSL) invalid or incompatible with Main software (MSW)

Program Memory Failure

Pneumatic backup air management control (idle cut-off, no regeneration) No EPB functions Pneumatic backup release and apply of PB is possible No CAN and LIN communication.

No ParkBrakeActuationStatus.

“Main SW download is interrupted OR wrong compatibility number between  BSL and Main SW.

Diagnostic Service 14. No additional action is needed.

– download SW

– Replace APM

Electronic control unit

————————————————————————————————————————————————————————————

U300046

Dataset compatibility or block checksum calculation fails

Calibration / Parameter Memory Failure

Pneumatic backup air management control (idle cut-off, no regeneration) No EPB functions Pneumatic backup release and apply of PB is possible No CAN and LIN communication.

No ParkBrakeActuationStatus.

Damage of the EEPROM of the ECU Damage of the flash and/or flash content Compatibility number of datasets and MSW differs. SM function for updating failures was called with a parameter which is out of range.

Diagnostic Service 14. No additional action is needed.

– download dataset

– execute restore system supplier data

– download MSW

– replace APM

Electronic control unit

————————————————————————————————————————————————————————————

U300049

EEPROM invalid or unpartitioned or protected EEPROM invalid or CSWC internal failure

Internal Electronic Failure

Pneumatic backup air management control (idle cut-off, no regeneration) No EPB functions Pneumatic backup release and apply of PB is possible No CAN and LIN communication.

No ParkBrakeActuationStatus.

– No valid eeprom downloaded

– Damage of the eeprom of the ECU

– CSWC internal failure

Diagnostic Service 14. No additional action is needed.

– Replace APM

Electronic control unit

————————————————————————————————————————————————————————————

U30004A

HW stepping / MV / heater / sensor configuration is incompatible with the Main SW

Incorrect Component Installed

Pneumatic backup air management control (idle cut-off, no regeneration) No EPB functions Pneumatic backup release and apply of PB is possible No CAN and LIN communication.

No ParkBrakeActuationStatus.

– Software is incompatible with the hardware or number of solenoids or sensors

Diagnostic Service 14. No additional action is needed.

– download Main software (MSW) and download dataset

– Replace APM

Electronic control unit

————————————————————————————————————————————————————————————

U30004B

Ecu temperature is too high.

Normal operating

range: -40 to +85°C

Over Temperature

High risk of unintended parking brake actuation

Environement temperature is above normal operating range or ECU damaged

– Diagnostic Service 14. No additional action is needed.

– Check the temperature arround  APM : High temperature can be caused by (gaz Exhaust leakage, wrong installation of cab heating system…).

Electronic control unit

————————————————————————————————————————————————————————————

U300054

End-of-line (vehicle related) parameter setting (dataset) is missing

Missing Calibration

Parking brake function related plausibility monitoring disbaled.

Dataset is missing.

Diagnostic Service 14. No additional action is needed.

– Download vehicle configuration dataset

– Check parking brake chamber configuration of the axles

Electronic control unit

Node

DTC ISO

FailureEvent

FTB_Name

FunctBehaviorDesc

PossibleRootCause

ProcedureEraseConfirmedDtc

ProposedWorkshopAction

ProprietaryName

————————————————————————————————————————————————————————————

U300055

DFLASH dataset invalid

Not Configured

Pneumatic backup air management control (idle cut-off, no regeneration) No EPB functions Pneumatic backup release and apply of PB is possible No CAN and LIN communication.

No ParkingBrakeActuation Status

No valid Dflash downloaded

Diagnostic Service 14. No additional action is needed.

– Flash the dataset.

– Replace APM if not successful.

Electronic control unit

————————————————————————————————————————————————————————————

U300094

Microcontroller halted unexpectedly

Unexpected Operation

Pneumatic backup air management control (idle cut-off, no regeneration) No EPB functions Pneumatic backup release and apply of PB is possible No CAN and LIN communication.

No ParkBrakeActuationStatus.

– Unexpected microcontroller error caused by software or hardware

Diagnostic Service 14. No additional action is needed.

– dowload Main software (MSW)

– Replace APM

Electronic control unit

————————————————————————————————————————————————————————————

U002849

CAN driver hardware

/ software error

Internal Electronic Failure

CAN communication restricted, worst case: Pneumatic backup air management control (idle cut-off, no regeneration)

No EPB functions Pneumatic backup release and apply of PB is possible

No CAN and LIN communication. No

ParkBrakeActuationStatus.

internal ECU Can driver failure

Diagnostic Service 14. No additional action is needed.

– Replace APM

CAN Communication Chassis Net

————————————————————————————————————————————————————————————

U002886

At least one of the follwing signals has error value: WheelBasedVehicleS peed, DriverEngineShutoff

_rqst, Vehicle mode WheelBasedVehicleS peed – updated only in high VM DriverEngineShutoff

_rqst – updated in all VM

Signal Invalid

Vehicle mode invalid: No parking brake release is possible, automatic functions and trailer test is not available / WheelBasedVehicleSpeed, DriverEngineShutoff_rqst is invalid: If redundant signals are also missing then Autorelease not available XPR not available

Damage of other ECUs

Diagnostic Service 14. No additional action is needed.

– Read out failure codes of the Vehicle ECU (VMCU)

– Check communication of the Chassis Net

– Check ECUs connected to the Chassis Net

CAN Communication Chassis Net

Node

DTC ISO

FailureEvent

FTB_Name

FunctBehaviorDesc

PossibleRootCause

ProcedureEraseConfirmedDtc

ProposedWorkshopAction

ProprietaryName

————————————————————————————————————————————————————————————

U002887

Timeout of Vehicle mode signal is over Vehicle mode or WheelBasedVehicleS peed or DriverEngineShutoff

_rqst is not received in time (6x the missingignal peridoicity)

Missing Message

Vehicle mode missing: No parking brake release is possible, automatic functions and trailer test is not available / WheelBasedVehicleSpeed, DriverEngineShutoff_rqst is missing: If redundant signals are also missing then Autorelease not available XPR not available

Demage onVMCU. damage on CAN bus Damage on CAN wiring.

Diagnostic Service 14. No additional action is needed.

– Read out failure codes of the Vehicle ECU

– Check APM connector and CAN wires and contacts

– Check the Chassis Net wires and communication.

CAN Communication Chassis Net

————————————————————————————————————————————————————————————

U002888

CAN electronic data link bus off detected if there is no difference between the CAN wires

Bus off

Wake up by LIN. Just manual parking is possible. Governing is working. No ParkingBrakeActuation Status

– CAN cabling errors (e.g. short circuit

Diagnostic Service 14. No additional action is needed.

– Check CAN wires and connector pins. Measure bus resistance

– Replace APM

CAN Communication Chassis Net

————————————————————————————————————————————————————————————

U300313

Direct battery supply line (pin 5) voltage level below 16 Volt threshold.

Circuit Open

Power supply redundancy is lost, possible loss of learned parameters.

Shut down process is not guaranteed (Autopark, final reg, Compressor pipe exhaust).

Parking brake actuation is not guaranteed at ignition off.

– wrong supply voltage level

– damage of wiring

– internal electric failure

Diagnostic Service 14. No additional action is needed.

– Check wiring, connectors, fuse.

– Check battery voltage

– Replace APM

Battery Power

————————————————————————————————————————————————————————————

U300316

Maximum voltage of battery supply lines (pin 5 and pin14) below threshold longer than a timeframe 110ms

If voltage level below 16V

Circuit Voltage Below Threshold

Further voltage decrease might cause Pneumatic backup of the air management control (idle cut-off, no regeneration) and No EPB functions Pneumatic backup release and apply of PB is possible.

– wrong supply voltage level

– internal electric failure

– damage of the ECU

– damage of wiring

Diagnostic Service 14. No additional action is needed.

– Check wiring, connectors, fuse.

– Check battery voltage

– Replace APM

Battery Power

————————————————————————————————————————————————————————————

U300317

Maximum voltage of battery supply lines (pin 5 and pin14) above threshold (32V) longer than a timeframe

Circuit Voltage Above Threshold

Further voltage increase might cause Pneumatic backup of the air management control (idle cut-off, no regeneration) and No EPB functions Pneumatic backup release and apply of PB is possible.

– wrong supply voltage level

– internal electric failure

– damage of the ECU

– damage of wiring

Diagnostic Service 14. No additional action is needed.

– Check wiring, connectors, fuse.

– Check battery voltage

– Replace APM

Battery Power

————————————————————————————————————————————————————————————

C100101

Failure detected in the electrical circuit of the regeneration magnet valve

General Electrical Failure

Pneumatic backup air management control (idle cut-off, no regeneration)

“- damage of the wiring

– damage of the Magnet Valve

– damage of the ECU”

Diagnostic Service 14. No additional action is needed.

– Replace APM

Air Management Regeneration Solenoid Valve

————————————————————————————————————————————————————————————

C100201

“Failure detected in the electrical circuit of the governor magnet valve

General Electrical Failure

Pneumatic backup air management control (idle cut-off, no regeneration)

“- damage of the wiring

– damage of the Magnet Valve

– damage of the ECU”

Diagnostic Service 14. No additional action is needed.

– Replace APM

Air Management Governor Solenoid Valve

Node

DTC ISO

FailureEvent

FTB_Name

FunctBehaviorDesc

PossibleRootCause

ProcedureEraseConfirmedDtc

ProposedWorkshopAction

ProprietaryName

————————————————————————————————————————————————————————————

C100294

Failure is set in case of external  excitation on the MV

Unexpected Operation

Compressor is continuously in off-load, vehicle will loose the stored compressed air.

– damage of the ECU

– unintended actuation

– shortcut in the magnet valve circuit (due to humidity)

Diagnostic Service 14. No additional action is needed.

– Replace APM

Air Management Governor Solenoid Valve

————————————————————————————————————————————————————————————

C102A01

Failure is set if the sensor shorted to ground.

Failure is set if the sensor shorted to ubat.

General Electrical Failure

EPB: No functional effect, redundant information is lost. Backup Level 1.

PPB: Parking brake actuation status is not available.

damage of the sensor wiring damage of the sensor or damage of the ECU

Diagnostic Service 14. No additional action is needed.

– Replace APM

Parking Brake Chamber Pressure Sensor

————————————————————————————————————————————————————————————

C100A7A

System pressure level increases over cut off level more than 0.5 bar staying in off load phase

*setting the DTC indirectly depends on vehicle modes when the engine is running

Fluid Leak or Seal Failure

Compressor cannot be switched to off-load. High pressure. Limited circuits are not affected.

“1. ESS line damaged

2. Unloader valve failure

3. Magnet valve failure

4. Sensor failure”

Diagnostic Service 14. No additional action is needed.

1 – Check if compressor control pipe  line has no leakage when compressor is off load .

2 – Unloader – Open the cartridge, Check area below the cartridge in the sieve area (and  below the sieve) against dirt or ice  and blockings (sieve blocked), check main exhaust silencer if not blocked

3- If no problem on compressor pipe and no dirt, replace unloader valve. (Kit). 4 – If still problem , replace  APM

Governor valve pressure

————————————————————————————————————————————————————————————

C100C64

No more failure free pressure sensor available in circuits without pneumatic pressure limiter without back stream or check valve.System pressure cannot be estimated.

Signal Plausibility Failure

Pneumatic backup air management control (idle cut-off, no regeneration) No electronic parking brake release is not possible.

See the root causes of failures reported simultaneously

Diagnostic Service 14. No additional action is needed.

– Check if power supply voltage is less than 8 Volt (in this case also the DTC U300316 is active)

– Deflate the air tanks – fill-up and follow if pressures are increasing normally – Check if failure reoccurs .

– if yes, exchange APM

Air Pressure System

————————————————————————————————————————————————————————————

C100C7A

“Circuit 1 pressure level reached above the maximal cut off plus 1.5 bar

Circuit 2 pressure level reached above the maximal cut off plus 1.5 bar”

Fluid Leak or Seal Failure

Pneumatic backup air management control (idle cut-off, no regeneration)

“1. ESS line damaged

2. Unloader valve failure

3. Magnet valve failure

4. Sensor failure”

Diagnostic Service 14. No additional action is needed.

1 – Check if compressor control pipe  line has no leakage when compressor is off load .

2 – Unloader – Open the cartridge, Check area below the cartridge in the sieve area (and  below the sieve) against dirt or ice  and blockings (sieve blocked), check main exhaust silencer if not blocked

3- If no problem on compressor pipe and no dirt, replace unloader valve. (Kit). 4 – If still problem , replace  APM

Air Pressure System

————————————————————————————————————————————————————————————

C100C7B

At least one circuit pressure is under low limit when the vehicle is moving (v>10 km/h)

Low Fluid Level

Service brake performance is not sufficient

“1. High air consumption

2. Leakage or defect in air circuits”

Diagnostic Service 14. No additional action is needed.

– When compressor is loading, check leakage at APM main exhaust . No leakage expected until cut off pressure.

– If leakage, exchange unloader valve.

Air Pressure System

————————————————————————————————————————————————————————————

C100D7B

Circuit 1 pressure level reached minimal pressure level (parameter) after reaching the nominal pressure (paramater) when the vehicle is moving (v>10 km/h)

Low Fluid Level

Service brake performance lost

“1. High air consumption

2. Leakage or defect in air circuits”

Diagnostic Service 14. No additional action is needed.

– When compressor is loading, check leakage at APM main exhaust . No leakage expected until cut off pressure.

– If leakage, exchange unloader valve.

Air supply pressure front brake circuit

Node

DTC ISO

FailureEvent

FTB_Name

FunctBehaviorDesc

PossibleRootCause

ProcedureEraseConfirmedDtc

ProposedWorkshopAction

ProprietaryName

————————————————————————————————————————————————————————————

C100E7B

Circuit 2 pressure level reached minimal pressure level (parameter) after reaching the nominal pressure (paramater) when the vehicle is moving (v>10 km/h)

Low Fluid Level

Service brake performance lost

“1. High air consumption

2. Leakage or defect in air circuits”

Diagnostic Service 14. No additional action is needed.

– When compressor is loading, check leakage at APM main exhaust . No leakage expected until cut off pressure.

– If leakage, exchange unloader valve.

Air Supply Pressure Rear Brake Circuit

————————————————————————————————————————————————————————————

C100F62

Pressure difference between Circuit 1

and 2 is above 1.5 bar

Signal Compare Failure

Pneumatic backup air management control (idle cut-off, no regeneration) No electronic parking brake release is not possible.

“1. External fill up through Circuit 1 or Circuit 2 air tanks

2. Sensor failure

3. Protection valve failure”

Diagnostic Service 14. No additional action is needed.

– Deflation of system down to pressure level of 5 bar and then fill up the system up to cut off pressure and let APM switch to off load. Wait for 30s.

– Check the service brake circuits for leakage

– Replace APM

Front and Rear Brake Circuit

————————————————————————————————————————————————————————————

C101024

The cartridge is over worn

Signal Stuck High

No APM functional effect, high risk to freeze brake parts.

“1. Cartridge is overworn

2. High air consumption

3. Leakage

4. Compressor failure

5. Wrong compressor parameter configured

Diagnostic Service 14. No additional action is needed.

— Replace cartridge – Reset the maintenance data of APM cartridge (by techtool or menu in cluster);

– Check of reservoirs: If there is water in reservoirs, drain water from reservoirs, actuate and release 30 times the park brake to eliminate water in park brake circuit (can cause a stop in the future).

– If the periodicidy of  maintenance is short (abnormal cartridge life time (under 6 months))following additional actions must be done:

–  Check vehicle for air leakage while system is filled up with PB released (engine running not needed)

– Check compressor performance  by measuring the inflating air system time (techtool action).

Air Filter Cartridge Wear

————————————————————————————————————————————————————————————

C101068

The cartridge is 100% worn, and must be changed.

Event Information

No functional effect, water content in the compressed air reservoirs can be too high, freeze possible

“1. Cartridge is worn

2. High air consumption

3. Leakage

4. Compressor failure

5. Wrong compressor parameter configured

Diagnostic Service 14. No additional action is needed.

– Replace cartridge – Reset the maintenance data of APM cartridge (by techtool or menu in cluster);

– Check of reservoirs: If there is water in reservoirs, drain water from reservoirs, actuate and release 30 times the park brake to eliminate water in park brake circuit (can cause a stop in the future).

– If the periodicidy of  maintenance is short (abnormal cartridge life time (under 6 months))following additional actions must be done:

–  Check vehicle for air leakage while system is filled up with PB released (engine running not needed)

– Check compressor performance  by measuring the inflating air system time (techtool action).

Air Filter Cartridge Wear

————————————————————————————————————————————————————————————

C101164

Calculated duty factor of the compressor is above 85%

Signal Plausibility Failure

No sufficient regeneration

“1: High air consumption

2. air Leakage

3. Vehicle usage not corresponds to the designed compressor purpose

4. Compressor failure

Diagnostic Service 14. No additional action is needed.

– Check Air system for possible air leakage on the vehicle.

– Check vehicle usage relative to Air compressor size.

– Check of reservoirs: If there is water in reservoirs, drain water from reservoirs, actuate and release 30 times the park brake to eliminate water in park brake circuit (can cause a stop in the future).

– if the fault is set in normal usage (like high air consumption on specific application) and there is no air leakage, the function” Engine Speed Control” can be enabled by parameter P1F08 to limit the occurence.

–  If the fault occurence is high , contact the after market product specialist for specific solution.

Air Compressor

————————————————————————————————————————————————————————————

C101512

Safety relay of Air management short circuit to supply voltage or short between relays or BuC can not switch off relays

Circuit Short To Battery

No effect on the functionality Safety feature of the relay is not available.

– internal electric failure

– damage of the ECU

Diagnostic Service 14. No additional action is needed.

– Replace APM

Regeneration and Governor Valve High Side Solenoid

————————————————————————————————————————————————————————————

C101513

Safety relay of Air management open circuit to supply

voltage.

Circuit Open

Pneumatic backup air management control (idle cut-off, no regeneration)

– internal electric failure

– damage of the ECU

Diagnostic Service 14. No additional action is needed.

– Replace APM

Regeneration and Governor Valve High Side Solenoid

Node

DTC ISO

FailureEvent

FTB_Name

FunctBehaviorDesc

PossibleRootCause

ProcedureEraseConfirmedDtc

ProposedWorkshopAction

ProprietaryName

————————————————————————————————————————————————————————————

C101268

The cartridge is nearly fully worn

Event Information

No functional effect.

“1. Cartridge is getting worn

2. High air consumption

3. Leakage

4. Compressor failure

5. Wrong engine speed signal

6. Wrong compressor parameter configured

7. Sensor failure”

Diagnostic Service 14. No additional action is needed

— The replacement of cartridge can be done in advance (avoid to go go back soon for this in workshop)

– Reset the maintenance data of APM cartridge (by techtool or menu in cluster);

– Check of reservoirs: If there is water in reservoirs, drain water from reservoirs, actuate and release 30 times the park brake to eliminate water in park brake circuit (can cause a stop in the future).

– If the periodicidy of  maintenance is short (abnormal cartridge life time (under 6 months))following additional actions must be done:

–  Check vehicle for air leakage while system is filled up with PB released (engine running not needed)

– Check compressor performance  by measuring the inflating air system time (techtool action).

Air Filter Cartridge

————————————————————————————————————————————————————————————

C102172

Parking brake pressure is above than the Circuit 3 and Circuit 4 limitation pressure plus 1500 mbar

Actuator Stuck Open

Parking brake status is not available, possible damage of the trailer

1. Pressure limiter failure

2. Sensor failure

Diagnostic Service 14. No additional action is needed

– Deflate fully air tanks and Fill up the system to the cut off pressure, apply and release the parking brake; check if problem reoccurs.

– Check parking brake connection to the springbrake chambers

– Check the APM exhaust ports

– Compare value of DID P1E0K to value of manometer connected to port 29.2

– Compare value of DID P1E0J to value of manometer connected to port 28.1/28.2

– Replace APM

Pressure Limiter

————————————————————————————————————————————————————————————

U114A47

Intercontroller communication error detected or software of secondary controller is incompatible with the software of primary controller

Watchdog / Safety µC Failure

Pneumatic backup air management control (idle cut-off, no regeneration) No EPB functions Pneumatic backup release and apply of PB is possible No CAN and LIN communication. No ParkBrakeActuationStatus.

– Wrong compatibility number of BuC.

– AuC and BuC communication lost

Diagnostic Service 14. No additional action is needed.

– dowload Main software (MSW)

– Replace APM

Secondary Control Unit

————————————————————————————————————————————————————————————

U114A68

Internal function failure or intercontroller communication error .

Event Information

Learned parameters are not stored. Lost wetness information.  Frequent occurrence can lead to wetness in the system.

Secondary controller can not prevent to send incorrect information by the primary one

– internal Electric failure

– failure between AuC and BuC communication

– power supply is increased very slow from low value, the CAN transceiver goes into an internal error state which possible is not handled by CSWC.

Diagnostic Service 14. No additional action is needed.

– perform a hard reset

– download MSW

– Replace APM

Secondary Control Unit

————————————————————————————————————————————————————————————

U114913

CCIOM power supply line (pin 14) voltage level below threshold. 8V

Circuit Open

Power supply redundancy is lost.

– wrong supply voltage level

– damage of wiring

– internal electric failure

Diagnostic Service 14. No additional action is needed.

– Check wiring, connectors, fuse

– Check battery voltage

– check CCIOM failure

– Replace APM

Backup Power Supply

————————————————————————————————————————————————————————————

U114C68

Number of failed DTCs reached its maximal number (29 DTCs)

Event Information

No functional effect.

Too many errors in the system

Diagnostic Service 14. No additional action is needed.

– Check the workshop action for other active DTCs

DTC Notification Max Limit Reached

————————————————————————————————————————————————————————————

C102668

estimated leakage > Level 1 leakage threshold parameter

Event Information

No functional effect

1. Pneumatic channel connection failure

2. Unexpected air flow out from a mechanical

component

Diagnostic Service 14. No additional action is needed.

– Check air circuits for possible leakage.

– Check the piping on the vehicle. And also possible leakage on trailer

– when leakage repaired , Reset leakage monitoring by Routine service R1AEK

Vehicle Air Pressure System

————————————————————————————————————————————————————————————

C10267A

estimated leakage > Level 2 leakge threshold parameter

Fluid Leak or Seal Failure

No functional effect on the air management, fuel consumption of the vehicle might be higher

1 Vehicle usage not corresponds to the designed purpose

2. Pneumatic channel connection failure

3. Unexpected air flow out from a mechanical

component

Diagnostic Service 14. No additional action is needed.

– Check air circuits for possible leakage.

– Check the piping on the vehicle. And also possible leakage on trailer

– when leakage repaired , Reset leakage monitoring by Routine service R1AEK.

Vehicle Air Pressure System

Node

DTC ISO

FailureEvent

FTB_Name

FunctBehaviorDesc

PossibleRootCause

ProcedureEraseConfirmedDtc

ProposedWorkshopAction

ProprietaryName

————————————————————————————————————————————————————————————

U1FFF68

The ECU is in active Factory Mode.

P1C54 set to TRUE.

Event Information

Auto-release, auto-park and park-brake alert are unavailable

Factory Mode not disabled.

Diagnostic Service 14. No additional action is needed.

Set the Factory Mode flag to false in NVM, then execute ECU reset.

Factory Mode Active

————————————————————————————————————————————————————————————

C102B01

Failure detected in the electrical circuit of the heater or the temperature sensor

General Electrical Failure

Heater functionality is not available or restricted

– damage of the ECU internal wiring

– damage of the heater

– damage of the ECU

Diagnostic Service 14. No additional action is needed.

Replace APM

Heating Resistor

————————————————————————————————————————————————————————————

C102B55

Heater functionality is enabled but heater is not present

Not Configured

Heater functionality is not available or restricted

– heater is not installed,

– invalid configuration of EEPROM,

– damage of the ECU

Diagnostic Service 14. No additional action is needed.

– download dataset

– download MSW

– Replace ECU

Heating Resistor

————————————————————————————————————————————————————————————

C102B68

Heater is inhibited in case of secondary braking.

Event Information

Heater functionality is not available or restricted

Secondary braking was activated.

Diagnostic Service 14. No additional action is needed.

No action

Heating Resistor

————————————————————————————————————————————————————————————

C100401

Failure detected in the electrical circuit of the state manager magnet valve

open circuit, short circuit, short circuit between 2 magnet valves, external excitation.

General Electrical Failure

Electronic Parking Brake functions are not avaiable.

– damage of the Magnet Valve wiring

– damage of the Magnet Valve

– damage of the ECU

Diagnostic Service 14. No additional action is needed.

– Replace APM

Electronic Parking Brake chassis state manager valve solenoid

————————————————————————————————————————————————————————————

C102472

Parking brake cannot be locked in park position

Actuator Stuck Open

Last safe state restored depending on safety conditons.

After 3 unsuccessful actuation attempt parking brake is no more operational

“1. TCM or its control line is:

– damaged or

– installed on wrong port

or

– removed or

– replaced or

– other trailer control port is not plugged

2. Sensor failure.

3. APM internal valve failure

Diagnostic Service 14. No additional action is needed.

– TCM: disconnect the TCM pipe on APM port; close it’s port with plug. check park brake application and release 5 times. if it’s working failure free, replace TCM.

– Exhaust: check Park brake relay valve silencers for blocking and dirt,

check the plastic cover (plastic part can be removed for the check and put back after) of the secondary exhausts on the bottom against dirt and blocking.

– Additional action: Check compressor pipe, area below the cartridge and scilencer for freezing.

– Relay valve: exchange relay valve if other actions are not effective.

Pressure Control Valve

————————————————————————————————————————————————————————————

C102473

Parking brake cannot be locked in released position OR initialisation state cannot be determined

Actuator Stuck Closed

Last safe state restored depending on safety conditons.

After 3 unsuccessful release attempt parking brake is no more operational

1. Trailer control module or its control line is:

– damaged or

– installed on wrong port or

– removed or

– replaced or

– other trailer control port is not plugged

2. Sensor failure

3. APM internal valve failure”

Diagnostic Service 14. No additional action is needed.

– TCM: disconnect the TCM pipe on APM port ; close it’s port with plug. check park brake application and release 5 times. if it’s working failure free, replace TCM.

– Exhaust: check Park brake relay valve silencers for blocking and dirt, check the plastic cover (plastic part can be removed for the check and put back after) of the secondary exhausts on the bottom against dirt and blocking

– Relay valve: exchange relay valve if other actions are not effective

Pressure Control Valve

Node

DTC ISO

FailureEvent

FTB_Name

FunctBehaviorDesc

PossibleRootCause

ProcedureEraseConfirmedDtc

ProposedWorkshopAction

ProprietaryName

————————————————————————————————————————————————————————————

C102474

Parking brake initialisation state cannot be determined

Actuator Slipping

Parking brake cannot be released as long as parking brake is not requested to locked actuation position whatever the (P) lamp state is. Blinking HCU LED

“1. Trailer contriol module or its control line is:

– damaged or

– installed on wrong port or

– removed or

– replaced or

– other trailer control port is not plugged

2. Sensor failure

3. APM internal valve failure

Diagnostic Service 14. No additional action is needed.

– TCM: disconnect the TCM pipe on APM port ; close it’s port with plug. check park brake application and release 5 times. if it’s working failure free, replace TCM.

– Exhaust: check Park brake relay valve silencers for blocking and dirt, check the plastic cover (plastic part can be removed for the check and put back after) of the secondary exhausts on the bottom against dirt and blocking.

– Relay valve: exchange relay valve if other actions are not effective

Pressure Control Valve

————————————————————————————————————————————————————————————

C100801

“Failure is set if the sensor shorted to ground.

Failure is set if the sensor shorted to ubat.”

General Electrical Failure

Autorelease not available XPR not available Autopark is not available Safe operation of the parking brake in driving is not guaranteed

Trailer test not available.

“- damage of the sensor wiring

– damage of the sensor or

– damage of the ECU”

Diagnostic Service 14. No additional action is needed.

– Replace APM

Parking Brake Control Pressure Sensor

————————————————————————————————————————————————————————————

C100864

Parking brake control pressure deviates from the reference pressure more than the threshold, threshold is based on multicriteria formula.

Signal Plausibility Failure

Autorelease not available XPR not available Autopark is not available Safe operation of the parking brake in driving is not guaranteed

Trailer test not available.

1. Sensor failure

2. APM internal valve failure

Diagnostic Service 14. No additional action is needed.

– TCM check : disconnect the Trailer control module pipe on APM port – close it’s port with plug. check park brake application and release 5 times. if it’s working failure free, replace TCM.

– Exhaust check: check Park brake relay valve silencers for blocking and dirt,

check the plastic cover (plastic part can be removed for the check and put back after) of the secondary exhausts on the bottom against dirt and blocking

– APM change – If the other actions are not effective exchange APM

Parking Brake Control Pressure Sensor

————————————————————————————————————————————————————————————

C100001

Failure detected in the electrical circuit of the load magnet

valve

General Electrical Failure

Electronic Parking Brake functions are not avaiable.

“- damage of the wiring

– damage of the Magnet Valve

– damage of the ECU”

Diagnostic Service 14. No additional action is needed.

– Replace APM

Electronic Parking Brake chassis load valve solenoid

————————————————————————————————————————————————————————————

C100301

Failure detected in the electrical circuit of the exhasut magnet valvee is set

General Electrical Failure

Electronic Parking Brake functions are not avaiable.

“- damage of the wiring

– damage of the Magnet Valve

– damage of the ECU”

Diagnostic Service 14. No additional action is needed.

– Replace APM

Electronic Parking Brake chassis exhaust valve solenoid

————————————————————————————————————————————————————————————

C102A64

Parking brake chamber pressure deviates the reference pressure more than the threshold, this threshold is based on multicriteria formula.

Signal Plausibility Failure

No functional effect, redundant information is lost. Backup Level 1.

1. Sensor failure

2. APM internal valve failure

Diagnostic Service 14. No additional action is needed.

– TCM: disconnect the TCM pipe on APM port ; close it’s port with plug. check park brake application and release 5 times. if it’s working failure free, replace TCM.

– Exhaust: check Park brake relay valve silencers for blocking and dirt, check the plastic cover (plastic part can be removed for the check and put back after) of the secondary exhausts on the bottom against dirt and blocking.

-Relay valve: exchange relay valve if other actions are not effective.

Parking Brake Chamber Pressure Sensor

————————————————————————————————————————————————————————————

C101612

Safety relay of Electronic Parking brake short circuit to Ubat or short between relays or BuC can not switch

off relays

Circuit Short To Battery

No effect on the driver. Safety feature of the relay is not available. Backup level 1.

– internal electric failure

– damage of the ECU

Diagnostic Service 14. No additional action is needed.

– Replace APM

Load, exhaust and state manager valve high side solenoid

————————————————————————————————————————————————————————————

C101613

Safety relay of Electronic Parking Brake open circuit to

supply voltage.

Circuit Open

Electronic Parking Brake functions are not avaiable.

– internal electric failure

– damage of the ECU

Diagnostic Service 14. No additional action is needed.

– Wait 10mn ignition off  park applied, to cool the ecu.

–  afterward if still active  replace APM.

Load, exhaust and state manager valve high side solenoid

Node

DTC ISO

FailureEvent

FTB_Name

FunctBehaviorDesc

PossibleRootCause

ProcedureEraseConfirmedDtc

ProposedWorkshopAction

ProprietaryName

————————————————————————————————————————————————————————————

C101862

Trailer control pressure provided  by parking brake deviates from the reference pressure minus threshold, this threshold is based on multicriteria formula.

Signal Compare Failure

Trailer test is not successful and no more available, Autorelease, XPR and autopark functions are no more available.

1. Trailer control module or its pipe connection is damaged or incorrect trailer control port is not plugged

2. Trailer control module supply line is damaged.

3. Spring brake lines are damaged.

4. Parking brake relay valve failure

5. Sensor failure

6. APM internal valve failure

Diagnostic Service 14. No additional action is needed.

– TCM : disconnect the Trailer Control Module pipe on APM port – close it’s port with plug. check park brake application and release 5 times. if it’s working failure free, replace TCM.

– Exhaust : check Park brake relay valve silencers for blocking and dirt, check the plastic cover (plastic part can be removed for the check and put back after) of the secondary exhausts on the bottom against dirt and blocking

– Relay valve: exchange relay valve if other actions are not effective

Trailer Control Circuit

————————————————————————————————————————————————————————————

C101D62

Parking brake sensors are not correlating, faulty sensor cannot be identified

Signal Compare Failure

Autorelease not available XPR not available Autopark is not available Safe operation of the parking brake in driving is not guaranteed

Trailer test not available.

1. Sensor failure

2. APM internal valve failure

3. Wrong supply voltage level

Diagnostic Service 14. No additional action is needed

– APM exhausht in bottom: check the plastic cover (plastic part can be removed for the check and put back after) of the secondary exhausts on the bottom against dirt and blocking

– Relay valve: exchange relay valve if other actions are not effective.

Parking Brake Circuit

————————————————————————————————————————————————————————————

C101D7A

Parking brake control and chamber pressure higher than the reference pressure minus threshold, this threshold is based on multicriteria formula.

Fluid Leak or Seal Failure

No functional effect. Risk of unintended release due to high pressure in parking brake

1. Trailer control module or its pipe connection is damaged or incorrect trailer control port is not plugged

2. Trailer control module supply line is damaged.

3. Spring brake lines are damaged.

4. Parking brake relay valve failure

5. Sensor failure

6. APM internal valve failure

Diagnostic Service 14. No additional action is needed

– TCM: disconnect the TCM pipe on APM port – close it’s port with plug. check park brake application and release 5 times. if it’s working failure free, replace TCM.

– Exhaust: check Park brake relay valve silencers for blocking and dirt, check the plastic cover (plastic part can be removed for the check and put back after) of the secondary exhausts on the bottom against dirt and blocking.

– Relay valve: exchange relay valve if other actions are not effective.

Parking Brake Circuit

————————————————————————————————————————————————————————————

C101D7B

Parking brake control and chamber pressure lower than the reference pressure plus threshold, this threshold is based on multicriteria formula.

Low Fluid Level

No functional effect. Risk of unintended braking due to low pressure in parking brake

1. Trailer control module or its pipe connection is damaged or incorrect trailer control port is not plugged

2. Trailer control module supply line is damaged.

3. Spring brake lines are damaged.

4. Parking brake relay valve failure

5. Sensor failure

6. APM internal valve failure

Diagnostic Service 14. No additional action is needed

-‘TCM: disconnect the TCM pipe on APM port; close it’s port with plug. check park brake application and release 5 times. if it’s working failure free, replace TCM.

– Exhaust: check Park brake relay valve silencers for blocking and dirt, check the plastic cover (plastic part can be removed for the check and put back after) of the secondary exhausts on the bottom against dirt and blocking

– Additional action: Check compressor pipe, area below the cartridge and siclencer for freezing.

– Relay valve: exchange relay valve if other actions are not effective.

Parking Brake Circuit

Node

DTC ISO

FailureEvent

FTB_Name

FunctBehaviorDesc

PossibleRootCause

ProcedureEraseConfirmedDtc

ProposedWorkshopAction

ProprietaryName

————————————————————————————————————————————————————————————

C101F11

LIN signal received : HCU sensor shorted to ground

Circuit Short To Ground

Manual actuation, secondary braking and trailer test is not possible (due to hand control unit availability as it is disabled if any failure is indicated by the HCU).Backup autorelease and autopark are avaiable. No secondary brake function, no trailer test.  No indication on the HCU.

HCU sensor shorted to ground

Diagnostic Service 14. No additional action is needed.

– Check whether HCU movement is hindered or blocked

– Replace HCU (electronic Park brake lever)

Hand Control Unit

————————————————————————————————————————————————————————————

C101F12

LIN signal received : HCU sensor shorted to supply

Circuit Short To Battery

Manual actuation, secondary braking and trailer test is not possible (due to hand control unit availability as it is disabled if any failure is indicated by the HCU).Backup autorelease and autopark are avaiable. No secondary brake function, no trailer test.  No indication on the HCU.

HCU sensor shorted to power supply

Diagnostic Service 14. No additional action is needed.

– Check whether HCU movement is hindered or blocked

– Replace HCU (electronic Park brake lever)

Hand Control Unit

————————————————————————————————————————————————————————————

C101F1C

LIN signal received : HCU supply voltage failure

Circuit Voltage Out of Range

Manual actuation, secondary braking and trailer test is not possible (due to hand control unit availability as it is disabled if any failure is indicated by the HCU).Backup autorelease and autopark are avaiable. No secondary brake function, no trailer test.  No indication on the HCU.

HCU power supply out of range

Diagnostic Service 14. No additional action is needed.

– check wiring between APM and HCU

– replace HCU

– replace APM

Hand Control Unit

————————————————————————————————————————————————————————————

C101F28

the HCU sensor angle failure set error code was received.

Signal Bias Level Out of Range / Zero Adjustment Failure

Manual actuation, secondary braking and trailer test is not possible (due to hand control unit availability as it is disabled if any failure is indicated by the HCU).Backup autorelease and autopark are avaiable. No secondary brake function, no trailer test.  No indication on the HCU.

HCU sensor angle out of range failure

Diagnostic Service 14. No additional action is needed.

– Check whether HCU movement is hindered or blocked

– Replace HCU (electronic Park brake lever)

Hand Control Unit

Node

DTC ISO

FailureEvent

FTB_Name

FunctBehaviorDesc

PossibleRootCause

ProcedureEraseConfirmedDtc

ProposedWorkshopAction

ProprietaryName

————————————————————————————————————————————————————————————

C101F45

the HCU RAM/ROM failure set error code was received

Program Memory Failure

Manual actuation, secondary braking and trailer test is not possible (due to hand control unit availability as it is disabled if any failure is indicated by the HCU).Backup autorelease and autopark are avaiable. No secondary brake function, no trailer test.  No indication on the HCU.

RAM/ROM failure in HCU

Diagnostic Service 14. No additional action is needed.

– Check whether HCU movement is hindered or blocked

– Replace HCU (electronic Park brake lever)

Hand Control Unit

————————————————————————————————————————————————————————————

C101F49

LIN signal received : HCU sensor angle jump check failure OR amplifier failure OR amplitude ratio is not correct

Internal Electronic Failure

Manual actuation, secondary braking and trailer test is not possible (due to hand control unit availability as it is disabled if any failure is indicated by the HCU).Backup autorelease and autopark are avaiable. No secondary brake function, no trailer test.  No indication on the HCU.

HCU sensor amplifier failure

Diagnostic Service 14. No additional action is needed.

– Check whether HCU movement is hindered or blocked

– Replace HCU (electronic Park brake lever)

Hand Control Unit

————————————————————————————————————————————————————————————

C101F54

LIN signal received : HCU sensor calibration failure

Missing Calibration

Manual actuation, secondary braking and trailer test is not possible (due to hand control unit availability as it is disabled if any failure is indicated by the HCU).Backup autorelease and autopark are avaiable. No secondary brake function, no trailer test.  No indication on the HCU.

Sensor calibration failure in the HCU

Diagnostic Service 14. No additional action is needed.

– Check whether HCU movement is hindered or blocked

– Replace HCU (electronic Park brake lever)

Hand Control Unit

————————————————————————————————————————————————————————————

C101F64

LIN signal received : HCU lever stays more than 2 minutes in a position different than neutral or release position

Signal Plausibility Failure

Manual actuation, secondary braking and trailer test is not possible (due to hand control unit availability as it is disabled if any failure is indicated by the HCU).Backup autorelease and autopark are avaiable. No secondary brake function, no trailer test.

Lever stays is any position more than 2 minutes, except Neutral and Release position.

Diagnostic Service 14. No additional action is needed.

– Check whether HCU movement is hindered or blocked

– Replace HCU

Hand Control Unit

Node

DTC ISO

FailureEvent

FTB_Name

FunctBehaviorDesc

PossibleRootCause

ProcedureEraseConfirmedDtc

ProposedWorkshopAction

ProprietaryName

————————————————————————————————————————————————————————————

C101F86

Hand control unit CRC or signal invalid or UARTcommunicatio n failure or HCU alive counter freeze or HCU area signal is not available

Signal Invalid

Manual actuation, secondary braking and trailer test is not possible (due to hand control unit availability as it is disabled if any failure is indicated by the HCU).Backup autorelease and autopark are avaiable. No secondary brake function, no trailer test.  No indication on the HCU.

Electric disturbance on the LIN line

– SCI (UART) controller is damaged

– wiring damaged

– HCU damaged

Diagnostic Service 14. No additional action is needed.

– Check the wiring between HCU and APM

– Check whether HCU movement is hindered or blocked

– Check HCU against foreign particule below lever

– Check LIN communication (use another HCU to Check)

– change HCU

– change APM

Hand Control Unit

————————————————————————————————————————————————————————————

C101F87

LIN communication failure detected by HCU or APM

Missing Message

Manual actuation, secondary braking and trailer test is not possible (due to hand control unit availability as it is disabled if any failure is indicated by the HCU).Backup autorelease and autopark are avaiable. No secondary brake function, no trailer test.  No indication on the HCU.

HCU is not connected

or HCU cables are broken or electric disturbance

Diagnostic Service 14. No additional action is needed.

– Check the wiring between HCU and APM

– Check LIN communication (use another HCU to Check)

– change HCU

– change APM

Hand Control Unit

————————————————————————————————————————————————————————————

U114708

Backlight signal is undefined or error

for HCU

Bus Signal / Message Failures

HCU backlight is not controlled

Backlight signal is undefined or error failure in HCU

Diagnostic Service 14. No additional action is needed.

– check the dimming function in VMCU

– Check if backlight (white light) on HCU is working well.- (use another HCU to Check)

– If not change the HCU (electronic Park brake lever)

Hand Control Unit Backlight Data Link

————————————————————————————————————————————————————————————

U114808

Illumination signal is undefined or error for HCU

Bus Signal / Message Failures

PB indication on HCU lost

Illumination level signal is undefined or error failure in HCU

Diagnostic Service 14. No additional action is needed.

– check the dimming function in VMCU

– with park applied, Check if red LED on HCU is working well. (use another HCU to Check)

–  If not change the HCU (electronic Park brake lever)

Hand Control Unit Indicator LInk

————————————————————————————————————————————————————————————

U114A94

Failure intercontroller communication or unwanted parking brake actuation

Unexpected Operation

Pneumatic backup air management control (idle cut-off, no regeneration) No EPB functions Pneumatic backup release and apply of PB is possible No CAN and LIN communication. No ParkBrakeActuationStatus.

– Unexpected parking brake actuation.

– AuC and BuC communication lost

Diagnostic Service 14. No additional action is needed.

– dowload Main software (MSW)

– Replace APM

Secondary Control Unit

————————————————————————————————————————————————————————————

C102316

HCU power supply (pin 18) voltage level below threshold 8V

Circuit Voltage Below Threshold

Manual actuation, secondary braking and trailer test is not possible (due to hand control unit availability as it is disabled if any failure is indicated by the HCU).Backup autorelease and autopark are available. No secondary brake function, no trailer test.  No indication on the HCU.

– wrong supply voltage level

– internal electric failure

– damage of the ECU

Diagnostic Service 14. No additional action is needed.

– Check the wiring

– Check LIN communication (use another HCU to Check)

– change HCU

– change APM

Hand Control Unit Power Supply Circuit

Node

DTC ISO

FailureEvent

FTB_Name

FunctBehaviorDesc

PossibleRootCause

ProcedureEraseConfirmedDtc

ProposedWorkshopAction

ProprietaryName

————————————————————————————————————————————————————————————

C102317

HCU power supply (pin18) voltage level above threshold 16V

– measured inside the APM. External supply of HCU does not activate the DTC.

Circuit Voltage Above Threshold

Manual actuation, secondary braking and trailer test is not possible (due to hand control unit availability as it is disabled if any failure is indicated by the HCU).Backup autorelease and autopark are available. No secondary brake function, no trailer test.  No indication on the HCU.

– APM internal wrong supply voltage to HCU

– internal electric failure

– damage of the ECU

Diagnostic Service 14. No additional action is needed.

– Check the wiring

– Check LIN communication (use another HCU to Check)

– change HCU

– change APM

Hand Control Unit Power Supply Circuit

————————————————————————————————————————————————————————————

U114B01

short to GND or Power supply or floating line

General Electrical Failure

Manual actuation, secondary braking and trailer test is not possible (due to hand control unit availability as it is disabled if any failure is indicated by the HCU).Backup autorelease and autopark are available. No secondary brake function, no trailer test.  No indication on the HCU.

HCU wiring error, ECU, HCU HW damage

Diagnostic Service 14. No additional action is needed.

– Check the wiring

– Check LIN communication (use another HCU to Check)

– change HCU

– change APM

LIN12 Communication Net

————————————————————————————————————————————————————————————

U114B49

CSWC internal failure

Internal Electronic Failure

Manual actuation, secondary braking and trailer test is not possible (due to hand control unit availability as it is disabled if any failure is indicated by the HCU).Backup autorelease and autopark are avaiable. No secondary brake function, no trailer test.  No indication on the HCU.

HCU damage

Diagnostic Service 14. No additional action is needed.

– Check the wiring

– Check LIN communication (use another HCU to Check)

– change HCU

– change APM

LIN12 Communication Net

————————————————————————————————————————————————————————————

C102503

ADR signal  is floating

FM (Frequency Modulated) / PWM (Pulse Width Modulated) Failures

Autorelease not available XPR not available Autopark is not available Safe operation of the parking brake in driving is not guaranteed Trailer test not available.

ADR circuit/wiring error, ECU HW damage

Diagnostic Service 14. No additional action is needed.

– Check the wiring between ADR main switch and APM

– Check ADR signal on Pin 9 of APM connector/compare with P1CAJ “Air Production Modulator Input Main switch signal status”

–   Compare the status in P1CAJ and what measured on Pin 9: if it is the same, Check/Replace ADR switch.

– if satus in P1CAJ is different than what measured on Pin 9 : replace APM.

ADR Input Signal Circuit

————————————————————————————————————————————————————————————

C102511

ADR signal is constantly low on GND voltage level

Circuit Short To Ground

Autorelease not available XPR not available Autopark is not available Safe operation of the parking brake in driving is not guaranteed Trailer test not

available.

ADR circuit/wiring error, ECU HW damage

Diagnostic Service 14. No additional action is needed.

– Check the wiring between ADR main switch and APM

– Check ADR signal on Pin 9 of APM connector/compare with P1CAJ “Air Production Modulator Input Main switch signal status”

–   Compare the status in P1CAJ and what measured on Pin 9: if it is the same, Check/Replace ADR switch.

– if satus in P1CAJ is different than what measured on Pin 9 : replace APM.

ADR Input Signal Circuit

Node

DTC ISO

FailureEvent

FTB_Name

FunctBehaviorDesc

PossibleRootCause

ProcedureEraseConfirmedDtc

ProposedWorkshopAction

ProprietaryName

————————————————————————————————————————————————————————————

C102512

ADR signal is constantly high on battery voltage level

Circuit Short To Battery

Autorelease not available XPR not available Autopark is not available Safe operation of the parking brake in driving is not guaranteed Trailer test not

available.

ADR circuit/wiring error, ECU HW damage

Diagnostic Service 14. No additional action is needed.

– Check the wiring between ADR main switch and APM

– Check ADR signal on Pin 9 of APM connector/compare with P1CAJ “Air Production Modulator Input Main switch signal status”

–   Compare the status in P1CAJ and what measured on Pin 9: if it is the same, Check/Replace ADR switch.

– if satus in P1CAJ is different than what measured on Pin 9 : replace APM.

ADR Input Signal Circuit

————————————————————————————————————————————————————————————

C102527

ADR signal frequency deviates from pre-defined frequency values

Signal Rate of Change Above Threshold

Autorelease not available XPR not available Autopark is not available Safe operation of the parking brake in driving is not guaranteed. Trailer test not available.

ADR circuit/wiring error, ECU HW damage

Diagnostic Service 14. No additional action is needed.

– Check the wiring between ADR main switch and APM

– Check ADR signal on Pin 9 of APM connector/compare with P1CAJ “Air Production Modulator Input Main switch signal status”

–   Compare the status in P1CAJ and what measured on Pin 9: if it is the same, Check/Replace ADR switch.

– if status in P1CAJ is different than what measured on Pin 9 : replace APM.

ADR Input Signal Circuit

————————————————————————————————————————————————————————————

C102768

At least one of the incoming CAN signals needed for automatic parking brake release or XPR function is missing or invalid.

Event Information

Autorelease not available XPR not available. Backup level 2

1. EBS failure

2. TECU failure

3. accelerator pedal, door switches, gear lever failure

4. BBM failure

5. DACU failure

4. CAN commnunication failure

Diagnostic Service 14. No additional action is needed.

– Resolve failures reported by other ECUs (EBS, TECU,accelerator pedal, door switches,gear lever, BBM, DACU)

– Check the CAN communication and wiring

Parking Brake Function

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