POWER ASSISTED STEERING
Fault finding - Interpretation of faults
36B
36B - 15V6 MR-366-X84-36B000$462_eng.mif
PAS
Vdiag No.: 04, 06, 08, 0C
and 12POWER ASSISTED STEERING
Fault finding - Interpretation of faults
DF002
PRESENT
OR
STOREDCOMPUTER
DEF : Computer fault
WARNING
Consult the fault contexts.
If PR143 Internal fault codes = 46 and the battery voltage when the fault occurs (PR108) is above 9 V, do not
clear the fault; contact the Techline.
If PR143 Internal fault code = 46 and the battery voltage when the fault occurs (PR108) is less than or equal to
9 V, run fault finding on the battery and charge circuit and clear the fault.
For other values of PR143, do not clear the fault, contact the Techline.
NOTESConditions for applying the fault finding procedure to stored faults:
The fault is declared present after starting or a steering wheel movement from full lock
to full lock.
–Check the condition and connection of the battery terminals.
–Check that the EPAS black 2-track connector is correctly locked.
–Check that the EPAS black 8-track connector is correctly locked.
–Check the condition and conformity of the EPAS fuses: on the power fuse board (70A) and on the UPC (5A).
–Check the conformity of PR108 Computer feed voltage: 12 V < PR108 < 16 V.
Check that:
–there is a + 12 V before ignition feed on track 1 of the electric power steering black 2-track connector,
–there is an earth on track 2 of the electric power steering black 2-track connector,
–there is a + 12 V after ignition feed on track 8 of the steering column assembly black 8-track connector.
If there is a repair procedure (see Technical Note 6015A, Repairing electrical wiring, Wiring: Precautions for
repair), repair the wiring, otherwise change the wiring.
If the fault is still present, contact the Techline.
AFTER REPAIRCarry out a road test followed by a complete test with the diagnostic tool.
DAETRW_V04_DF002/DAETRW_V08_DF002/DAETRW_V06_DF002/DAETRW_V0C_DF002/
DAETRW_V12_DF002
MR-366-X84-36B000$462_eng.mif
POWER ASSISTED STEERING
Fault finding - Interpretation of faults
36B
36B - 16V6 MR-366-X84-36B000$462_eng.mif
PAS
Vdiag No.: 04, 06, 08, 0C
and 12
DF020
PRESENT
OR
STOREDCOMPUTER SUPPLY VOLTAGE
DEF : Computer internal voltage
NOTESSpecial notes:
Although stored in the computer, this fault is not caused by an electric power-assisted
steering failure, but by a poor electrical supply.
Conditions for applying the fault finding procedure to stored faults:
The fault is declared present after the engine is started or a steering wheel movement
from full lock to full lock.
–Check the condition and connection of the battery terminals.
–Check that the EPAS black 2-track connector is correctly locked.
–Check that the EPAS black 8-track connector is correctly locked.
–Check the condition and conformity of the EPAS fuses: on the power fuse board (70A) and on the UPC (5A).
–Check the conformity of PR108 Computer feed voltage: 12 V < PR108 < 16 V.
Check that:
–there is a + 12 V before ignition feed on track 1 of the electric power steering black 2-track connector,
–there is an earth on track 2 of the electric power steering black 2-track connector,
–there is a + 12 V after ignition feed on track 8 of the steering column assembly black 8-track connector.
If there is a repair procedure (see Technical Note 6015A, Repairing electrical wiring, Wiring: Precautions for
repair), repair the wiring, otherwise change the wiring.
Check the voltage of the battery and the charge circuit.
Repair if necessary.
If the fault is still present, contact the Techline.
AFTER REPAIRCarry out a road test followed by a complete test with the diagnostic tool.
DAETRW_V04_DF020/DAETRW_V08_DF020/DAETRW_V06_DF020/DAETRW_V0C_DF020/
DAETRW_V12_DF020
POWER ASSISTED STEERING
Fault finding - Interpretation of faults
36B
36B - 17V6 MR-366-X84-36B000$462_eng.mif
PAS
Vdiag No.: 04, 06, 08, 0C
and 12
DF033
PRESENT
OR
STOREDMULTIPLEX NETWORK
DEF : CAN connection fault
NOTESSpecial notes:
Although stored in the computer, this fault is not caused by an electric power-assisted
steering failure, but by a multiplex network fault.
Conditions for applying the fault finding procedure to stored faults:
The fault is declared present after the engine is started or a steering wheel movement
from full lock to full lock.
Check that:
–there is a + 12 V before ignition feed on track 1 of the electric power steering black 2-track connector,
–there is an earth on track 2 of the electric power steering black 2-track connector,
–there is a + 12 V after ignition feed on track 8 of the steering column assembly black 8-track connector.
If there is a repair procedure (see Technical Note 6015A, Repairing electrical wiring, Wiring: Precautions for
repair), repair the wiring, otherwise change the wiring.
Check the continuity of the wiring harness for the multiplex network (see 88B, Multiplexing):
Black 8-track connector track 5CAN_L
Black 8-track connector track 7CAN_H
If there is a repair procedure (see Technical Note 6015A, Repairing electrical wiring, Multiplex network: repair),
repair the multiplex connection, otherwise change the multiplex connection.
Check the continuity of the wiring harness for the multiplex network (see 88B, Multiplexing)
Black 8-track connector track 4CAN_L instrument panel
Black 8 track connector track 6CAN_H instrument panel
If there is a repair procedure (see Technical Note 6015A, Repairing electrical wiring, Multiplex network: repair),
repair the multiplex connection, otherwise change the multiplex connection.
Carry out a multiplex network test and deal with any faults.
If the fault is still present, contact the Techline.
AFTER REPAIRCarry out a road test followed by a complete test with the diagnostic tool.
DAETRW_V04_DF033/DAETRW_V08_DF033/DAETRW_V06_DF033/DAETRW_V0C_DF033/
DAETRW_V12_DF033
POWER ASSISTED STEERING
Fault finding - Interpretation of faults
36B
36B - 18V6 MR-366-X84-36B000$462_eng.mif
PAS
Vdiag No.: 04, 06, 08, 0C
and 12
DF035
PRESENT
OR
STOREDVARIABLE POWER ASSISTED STEERING MOTOR
DEF : Internal electronic fault
WARNING
For TRW EPAS Vdiag 04 only, consult the fault contexts.
–If PR143 Internal fault code = 58 and if the battery voltage when the fault occurs (PR108) is above 9 V, do not
clear the fault; contact the Techline.
–If PR143 Internal fault code = 58 and if the battery voltage when the fault occurs (PR108) is less than or equal
to 9 V, run fault finding on the battery and charge circuit.
–For other values of PR143, do not clear the fault, contact the Techline.
For the other Vdiag of TRW EPAS, do not clear the fault, contact the Techline.
NOTESConditions for applying the fault finding procedure to stored faults:
The fault is declared present after starting or a steering wheel movement from full lock
to full lock.
Special notes:
Apply the fault finding procedure only on Vdiag 04.
For Vdiag 06, 08, 0C and 12, do not clear the fault and contact the Techline.
–Check the condition and connection of the battery terminals.
–Check that the EPAS black 2-track connector is correctly locked.
–Check that the EPAS black 8-track connector is correctly locked.
–Check the condition and conformity of the EPAS fuses: on the power fuse board (70A) and on the UPC (5A).
–Check the conformity of PR108 Computer feed voltage: 12 V < PR108 < 16 V.
Check that:
–there is a + 12 V before ignition feed on track 1 of the electric power steering black 2-track connector,
–there is an earth on track 2 of the electric power steering black 2-track connector,
–there is a + 12 V after ignition feed on track 8 of the steering column assembly black 8-track connector.
If there is a repair procedure (see Technical Note 6015A, Repairing electrical wiring, Wiring: Precautions for
repair), repair the wiring, otherwise change the wiring.
If the fault is still present, contact the Techline.
AFTER REPAIRCarry out a road test followed by a complete test with the diagnostic tool.
DAETRW_V04_DF035/DAETRW_V08_DF035/DAETRW_V06_DF035/DAETRW_V0C_DF035/
DAETRW_V12_DF035
POWER ASSISTED STEERING
Fault finding - Interpretation of faults
36B
36B - 19V6 MR-366-X84-36B000$462_eng.mif
PAS
Vdiag No.: 04, 06, 08, 0C
and 12
DF038
PRESENT
OR
STOREDANGLE SENSOR
DEF : Sensor internal electronic fault
NOTESConditions for applying the fault finding procedure to stored faults:
The fault is declared present after a steering wheel movement from full lock to full lock
or a road test.
Check that:
–there is a + 12 V before ignition feed on track 1 of the electric power steering black 2-track connector,
–there is an earth on track 2 of the electric power steering black 2-track connector,
–there is a + 12 V after ignition feed on track 8 of the steering column assembly black 8-track connector.
If there is a repair procedure (see Technical Note 6015A, Repairing electrical wiring, Wiring: Precautions for
repair), repair the wiring, otherwise change the wiring.
Program the steering wheel angle sensor using command VP004 Steering wheel angle sensor programming.
If the fault is still present, contact the Techline.
AFTER REPAIRCarry out a road test followed by a complete test with the diagnostic tool.
DAETRW_V04_DF038/DAETRW_V08_DF038/DAETRW_V06_DF038/DAETRW_V0C_DF038/
DAETRW_V12_DF038
POWER ASSISTED STEERING
Fault finding - Interpretation of faults
36B
36B - 24V6 MR-366-X84-36B000$462_eng.mif
PAS
Vdiag No.: 04, 06, 08, 0C
and 12
DF059
PRESENT
OR
STOREDANGLE SENSOR
DEF : Sensor internal electronic fault
NOTESConditions for applying the fault finding procedure to stored faults:
The fault is declared present after a steering wheel movement from full lock to full lock
or a road test.
Check that:
–there is a + 12 V before ignition feed on track 1 of the electric power steering black 2-track connector,
–there is an earth on track 2 of the electric power steering black 2-track connector,
–there is a + 12 V after ignition feed on track 8 of the steering column assembly black 8-track connector.
If there is a repair procedure (see Technical Note 6015A, Repairing electrical wiring, Wiring: Precautions for
repair), repair the wiring, otherwise change the wiring.
Program the steering wheel angle sensor using command VP004 Steering wheel angle sensor programming.
If the fault is still present, contact the Techline.
AFTER REPAIRCarry out a road test followed by a complete test with the diagnostic tool.
DAETRW_V04_DF059/DAETRW_V08_DF059/DAETRW_V06_DF059/DAETRW_V0C_DF059/
DAETRW_V12_DF059
POWER ASSISTED STEERING
Fault finding - Interpretation of statuses
36B
36B - 34V6 MR-366-X84-36B000$660_eng.mif
PAS
Vdiag No.: 04, 06, 08, 0C
and 12POWER ASSISTED STEERING
Fault finding - Interpretation of statuses
ET020
PROGRAMMING THE STEERING WHEEL ANGLE SENSOR
NOTESSpecial notes:
–The status is declared as correct when it is STATUS 4 (nominal mode). Otherwise,
apply this fault finding procedure.
–An unprogrammed steering wheel angle sensor will cause the Service warning light
to come on.
–If the steering wheel angle sensor has never been programmed, the Service warning
light will flash rapidly until the index position is detected.
VARIOUS POSSIBLE STATUS VALUES (with the meaning):
STATUS 1–Steering wheel index not detected.
–Straight ahead wheel position not programmed.
–Invalid angle value.
–NOT PROGRAMMED: Program the steering wheel angle sensor.
STATUS 2–Steering wheel index detected.
–Straight ahead wheel position not programmed.
–Invalid angle value.
–NOT PROGRAMMED: Program the steering wheel angle sensor.
STATUS 3–Steering wheel index not detected.
–Straight ahead wheel position not programmed.
–Invalid angle value.
–PROGRAMMING DONE, CONFIRM ANGLE: Turn the steering wheel to right full lock, and then
left full lock; then slowly return to the centre point and go slightly beyond.
STATUS 4–Straight ahead wheel position not programmed.
–Valid angle value.
–PROGRAMMING COMPLETE
Note:
A present or stored fault may prevent the change to STATUS 4.
AFTER REPAIRRun a system fault check.
Repeat the conformity check.
DAETRW_V04_ET020/DAETRW_V08_ET020/DAETRW_V06_ET020/ DAETRW_V0C_ET020/
DAETRW_V12_ET020
MR-366-X84-36B000$660_eng.mif
POWER ASSISTED STEERING
Fault finding - Fault Finding Chart
36B
36B - 47V6 MR-366-X84-36B000$924_eng.mif
PAS
Vdiag No.: 04, 06, 08, 0C
and 12
ALP2 Loss of vehicle assistance without warning
NOTES–apply the ALP after a complete check with the diagnostic tool,
–check the conformity of ET026 Computer calibration.
The vehicle loses the assistance function if the electric power assisted steering fuse is broken or the power supply
is lost.
The driver will feel the loss of the assistance on the steering wheel. Steering will then be the same as for unassisted
steering, manoeuvrable when driving even at low speed, but very difficult to manoeuvre when stationary.
Without its power supply, the power-assisted steering computer can no longer illuminate the warning light, and so
the driver is not made aware of the fault.
Check the electric power-assisted steering and engine compartment fuses (70A) and the passenger compartment
fuse (5A).
Change the fuses if necessary.
Check the computer supply voltage:
Black 2-track connector track 1 Vehicle earth
Black 8-track connector track 8 Vehicle earth
If there is a repair procedure (see Technical Note 6015A, Repairing electrical wiring, Wiring: Precautions for
repair), repair the wiring, otherwise change the wiring.
Run a multiplex network test, and interpret any faults.
Check that the steering column and steering rack are in sound mechanical condition.
Repair if necessary.
Check that the front axle components, such as the track rod ends and shock absorber base plates, are in sound
mechanical condition.
Repair if necessary.
If the fault is still present, contact the Techline.
AFTER REPAIRCarry out a road test followed by a check with the diagnostic tool.
DAETRW_V04_ALP02/DAETRW_V08_ALP02/DAETRW_V06_ALP02/DAETRW_V0C_ALP02/
DAETRW_V12_ALP02