FAS Volvo FH4

—————————————————————————————————————-

U300004

Main algorithm has detected an error in an internal signal

System Internal Failures

N.A. – System behaviour determined by other DTC

Internal torque and angle sensor error

Diagnostic Service 14. No additional action is needed.

Replace VDS.

Electronic control unit

Node

DTC ISO

FailureEvent

FTB_Name

FunctBehaviorDesc

PossibleRootCause

ProcedureEraseConfirmedDtc

ProposedWorkshopAction

ProprietaryName

—————————————————————————————————————-

U300041

Faulty SW and/or Data Checksum Failure (invalid signature or

checksum).

General Checksum Failure

VDS electrical motor disengaged. Power steering via hydraulics.

Invalid SW and/or Data downloaded

Diagnostic Service 14. No additional action is needed.

1. Download new SW

 2. Replace VDS

Electronic control unit

—————————————————————————————————————-

U300044

RAM error

Data Memory Failure

VDS electrical motor disengaged. Power steering

via hydraulics.

RAM has been corrupted

Diagnostic Service 14. No additional action is needed.

Replace VDS.

Electronic control unit

—————————————————————————————————————-

U300045

NVRAM/ROM Error

Program Memory Failure

VDS electrical motor disengaged. Power steering via hydraulics.

1.CRC check mismatch occurs

 2.Write to NVRAM

fails

 3 . ECU detects a

ROM memory failure

Diagnostic Service 14. No additional action is needed.

1. Download new SW

 2. Replace VDS

Electronic control unit

—————————————————————————————————————-

U300046

EEPROM failure

Calibration / Parameter Memory Failure

VDS electrical motor disengaged. Power steering

via hydraulics.

1.Read and write error

   2. CRC check error

Diagnostic Service 14. No additional action is needed.

1. Download new SW

 2. Replace VDS

Electronic control unit

—————————————————————————————————————-

U300049

All types of internal faults that are not memory related (this includes also slave processors)

Internal Electronic Failure

VDS electrical motor disengaged. Power steering via hydraulics.

– Torque/Angle Sensor short circuit battery or open circuit

 – Torque/Angle

Sensor short circuit ground

– FAS internal CAN communication Alive/sequence counter incorrect

 – Error in A/D HW

Diagnostic Service 14. No additional action is needed.

Replace VDS.

Electronic control unit

—————————————————————————————————————-

U30004B

PCB over temperature > 110 deg C

Over Temperature

VDS electrical motor disengaged. Power steering via hydraulics.

– Steering gear malfunction.

   – Steering gear high

oil temp

Diagnostic Service 14. No additional action is needed.

1. Clean VDS externally if dirty.

 2 . Check steering gear malfunction.

   3. Replace VDS.

Electronic control unit

—————————————————————————————————————-

U300054

Processor calibration not performed

Missing Calibration

VDS electrical motor disengaged. Power steering via hydraulics.

Necessary information missing on NC or DSP processor

Diagnostic Service 14. No additional action is needed.

Replace VDS.

Electronic control unit

—————————————————————————————————————-

U300061

Main algorithm has detected a calculation error.

Signal Calculation Failure

N.A. – System behaviour determined by other DTC.

Could be caused by either an ECU internal error or an ECU external error

Diagnostic Service 14. No additional action is needed.

1. Check chassi CAN for fault codes on other nodes that could explain the behaviour.

 2. Perform front wheel alignment (incl. calibration of VDS motor angle offset).

 3. Replace VDS

Electronic control unit

—————————————————————————————————————-

U300064

Actual motor torque supervision – Discrepancy between requested motor torque and actual motor torque.

Signal Plausibility Failure

VDS electrical motor disengaged. Power steering via hydraulics.

Electrical motor malfunction.

Diagnostic Service 14. No additional action is needed.

Replace VDS

Electronic control unit

—————————————————————————————————————-

U300068

Failsafe mode is entered due to a serious error. DTC readout is needed to get the serious error causing failsafe

mode.

Event Information

VDS electrical motor disengaged. Power steering via hydraulics.

DTC readout is needed to get the error causing failsafe mode

Diagnostic Service 14. No additional action is needed.

1. If no other DTC: Calibrate torque offset compensation on existing VDS.

 2. N.A. – Service action determined by other DTC.

Electronic control unit

—————————————————————————————————————-

U300092

Main algorithm has detected a condition leading to an abnormal torque to the electrical motor.

Performance or Incorrect Operation

Possibly unnormal steering feel (other than motor disengaged or degraded mode)

– Wrong front wheel alignment

 – Flatted tyre

   – Wrong calibration

of electrical motor

 – or other external

error

Diagnostic Service 14. No additional action is needed.

N/A – Service action determined by other DTC

Electronic control unit

Node

DTC ISO

FailureEvent

FTB_Name

FunctBehaviorDesc

PossibleRootCause

ProcedureEraseConfirmedDtc

ProposedWorkshopAction

ProprietaryName

—————————————————————————————————————-

U300094

Faulty operation (this includes also slave processors)

U  nexpected

operation of type:

 1.

unexpected reset due to null pointer reference

 2 . division

by zero

 3 .

watchdog failure

Unexpected Operation

VDS electrical motor disengaged. Power steering via hydraulics.

Software error (division by zero, null pointer reference, etc)

Diagnostic Service 14. No additional action is needed.

Replace VDS.

Electronic control unit

—————————————————————————————————————-

U300098

Hydraulic servo probably

overheating

Component or System Over Temperature

Degraded Mode (Max torque N/A)

Failure in hydraulic servo or extensive steering at low

speeds.

Diagnostic Service 14. No additional action is needed.

1. Clean VDS externally if dirty.

 2 . Check steering gear malfunction.

 3 . Replace VDS.

Electronic control unit

—————————————————————————————————————-

U002868

A critical signal on Chassis CAN have been timed-out or have its error value

set.

Event Information

N.A. – System behaviour determined by other DTC.

Probably failure in another ECU.

Diagnostic Service 14. No additional action is needed.

1. Check chassi CAN for fault codes on other nodes that could explain the behaviour.

    2. Replace VDS.

CAN Communication Chassis Net

—————————————————————————————————————-

U002888

Bus off error occurred on Chassis CAN.

Bus off

VDS electrical motor disengaged. Power steering via hydraulics.

Short circuit on CAN cables (CAN High and/or CAN Low).

Diagnostic Service 14. No additional action is needed.

1. Check chassi subnet

2 . Replace VDS.

CAN Communication Chassis Net

—————————————————————————————————————-

U114106

Main algorithm has detected a critical fault causing failsafe mode.

Algorithm Based Failures

VDS electrical motor disengaged. Power steering via hydraulics.

– Either an internal ECU error or ECU external error.

 – Check other

failure codes from this unit to determine the root cause.

Diagnostic Service 14. No additional action is needed.

N.A. – Service action determined by other DTC

Electronic Control Unit Degraded Mode

—————————————————————————————————————-

U114168

Main algorithm has set unit to degraded mode. N.B. This DTC is no longer used!

Event Information

N.B. This DTC is no longer used! Possibly unnormal steering feel (other than motor disengaged or degraded mode).

N.B. This DTC is no longer used!

Diagnostic Service 14. No additional action is needed.

N/A

Electronic Control Unit Degraded Mode

—————————————————————————————————————-

U1FFF68

Factory Mode is active.

Event Information

VDS in factory mode (for example VDS electrical motor disengaged).

Parameter FactoryModeActive is set to True.

Diagnostic Service 14. No additional action is needed.

Shut off factory mode.

Factory Mode Active

—————————————————————————————————————-

U300316

ECU voltage below 14 V

Circuit Voltage Below Threshold

VDS electrical motor disengaged. Power steering via hydraulics.

Broken power lines.

Diagnostic Service 14. No additional action is needed.

1. Check voltage supply to VDS unit.

 2. Replace VDS.

Battery Power

—————————————————————————————————————-

U300317

ECU voltage above 37 V

Circuit Voltage Above Threshold

VDS electrical motor

disengaged. Power steering via hydraulics.

BatteryPower, lines, Fuse (FAS generates power)

Diagnostic Service 14. No additional action is needed.

1. Check voltage supply to VDS unit.

 2. Replace VDS.

Battery Power

—————————————————————————————————————-

C100016

Electrical Motor supply voltage too low i.e below  13.5 V

Circuit Voltage Below Threshold

VDS electrical motor disengaged. Power steering via hydraulics.

Broken power lines.

      Blown fuse.

Diagnostic Service 14. No additional action is needed.

1. Check voltage supply to VDS unit.

 2. Replace VDS.

Front Active Steering Electrical Motor

—————————————————————————————————————-

C100017

ECU voltage above 37 V

Circuit Voltage Above Threshold

VDS electrical motor disengaged. Power steering via hydraulics.

– Battery

   – Power cables

   – FAS generates

power

Diagnostic Service 14. No additional action is needed.

1. Check voltage supply to VDS unit.

 2. Replace VDS.

Front Active Steering Electrical Motor

—————————————————————————————————————-

C100019

Motor overload – the average motor current  consumption too high (> 130 deg C, calculated value).

Circuit Current Above Threshold

VDS electrical motor disengaged. Power steering via hydraulics.

– Steering Gear malfunction.

   – Steering column

(for example excessive friction).

Diagnostic Service 14. No additional action is needed.

1. Clean VDS externally if dirty.

 2 . Check steering gear malfunction.

   3. Replace VDS.

Front Active Steering Electrical Motor

Node

DTC ISO

FailureEvent

FTB_Name

FunctBehaviorDesc

PossibleRootCause

ProcedureEraseConfirmedDtc

ProposedWorkshopAction

ProprietaryName

—————————————————————————————————————-

C10001C

Electrical motor supply voltage out of range that do not constitute disengagement of FAS motor (below  16 V or above 35 V).

Circuit Voltage Out of Range

Degraded Mode (Max torque N/A).

– Battery

   – Power cables

Diagnostic Service 14. No additional action is needed.

1. Check voltage supply to VDS unit.

 2. Replace VDS.

Front Active Steering Electrical Motor

—————————————————————————————————————-

C10001D

Motor minor overload – the average motor current consumption too high (> 120 deg C,

calculated value).

Circuit Current Out of Range

Degraded Mode (Max torque N/A)

– Steering Gear malfunction.

   – Steering column

(for example excessive friction)

Diagnostic Service 14. No additional action is needed.

1. Clean VDS externally if dirty.

 2 . Check steering gear malfunction.

   3. Replace VDS.

Front Active Steering Electrical Motor

—————————————————————————————————————-

C10004B

Electrical motor critical over temperature (> 110 deg C).

Over Temperature

VDS electrical motor disengaged. Power steering via hydraulics.

Steering Gear malfunction.

      Steering gear high

oil temp.

 Steering column (for

example excessive friction)

Diagnostic Service 14. No additional action is needed.

1. Clean VDS externally if dirty.

 2. Check steering gear malfunction.

  3. Replace VDS.

Front Active Steering Electrical Motor

—————————————————————————————————————-

C100098

Electrical motor minor over temperature (> 100 deg C) or temp sensor broken.

Component or System Over Temperature

Degraded Mode (Max torque N/A)

Steering Gear malfunction.

      Steering gear high

oil temp.

 S teering column (for

example excessive friction)

Diagnostic Service 14. No additional action is needed.

1. Clean VDS externally if dirty.

2 . Check steering gear malfunction.

   3. Replace VDS.

Front Active Steering Electrical Motor

—————————————————————————————————————-

C100364

Comparison of the two “redundant” torque sensor inputs failed.

Signal Plausibility Failure

VDS electrical motor disengaged. Power steering via hydraulics.

Torque sensor error.

Diagnostic Service 14. No additional action is needed.

Replace VDS

Front Active Steering Failsafe Signal Circuit

—————————————————————————————————————-

C100254

Angle offset calibration not performed.

Missing Calibration

Possibly unnormal steering feel (other than motor disengaged or degraded

mode)

Angle offset calibration not performed

Diagnostic Service 14. No additional action is needed.

1. Calibrate motor angle offset on existing VDS.

 2. Replace VDS

Front Active Steering Angle Sensor

—————————————————————————————————————-

C100262

ECU internal angle sensor sector mismatch against chassis CAN steering wheel angle signal.

Signal Compare Failure

VDS electrical motor disengaged. Power steering via hydraulics.

– ECU internal angle sensor error

– External steering

wheel angle signal missing

 – External steering

wheel angle signal error

Diagnostic Service 14. No additional action is needed.

1. Check SAS steering wheel angle available.

 2. Perform front wheel alignment (incl. calibration of VDS motor angle offset).

 3 . Replace VDS.

Front Active Steering Angle Sensor

—————————————————————————————————————-

C100264

Comparison of the two “redundant” angle inputs failed.

Signal Plausibility Failure

VDS electrical motor disengaged. Power steering via hydraulics.

Angle sensor error.

Diagnostic Service 14. No additional action is needed.

Replace VDS.

Front Active Steering Angle Sensor

—————————————————————————————————————-

C100154

TOC (Torque Offset Compensation) calibration missing or faulty.

Missing Calibration

Possibly unnormal steering feel (other than motor disengaged or degraded mode)

TOC (Torque Offset Compensation) calibration missing or faulty.

Diagnostic Service 14. No additional action is needed.

1. Calibrate torque offset compensation on existing VDS.

 2 . Replace VDS.

Front Active Steering Torque Sensor

—————————————————————————————————————-

C100164

Comparison of the two “redundant” torque inputs failed.

Signal Plausibility Failure

VDS electrical motor disengaged. Power steering via hydraulics.

Torque sensor error.

Diagnostic Service 14. No additional action is needed.

Replace VDS.

Front Active Steering Torque Sensor

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