RM38T0EC _55 Steering _112287 POWER ASSIST SYSTEMS _0510880 POWER STEERING SYSTEM J

POWER ASSIST SYSTEMS POWER STEERING SYSTEM EPS Warning Light Circuit

DESCRIPTION

Use the following procedure if no DTCs are output but the EPS warning light is illuminated continuously.

The power steering ECU assembly controls the warning light in the combination meter assembly via CAN communication.

NOTICE:: When the power steering ECU assembly has been replaced, perform Power Steering ECU Initial Setting (assist map writing).; Click hereSteering>POWER ASSIST SYSTEMS>POWER STEERING SYSTEM>CALIBRATION202201,999999,_55,_112287,_0510880,RM1000000020BL6,

1.CHECK VEHICLE CONTROL HISTORY (POWER STEERING SYSTEM)

Enter the following menus: Chassis / EMPS / Utility / Vehicle Control History (RoB).

Chassis > EMPS > Utility

Tester Display
Vehicle Control History (RoB)

50005 405 55

HINT:: The EPS warning light illuminates if any vehicle control history is stored.

Result:

Result	Proceed to
Vehicle control history not stored for power steering ECU assembly	A
Vehicle control history stored for power steering ECU assembly	B

2.INSPECT COMBINATION METER ASSEMBLY

PERFORM TROUBLESHOOTING AND REPAIR REGARDING VEHICLE CONTROL HISTORY

NOTICE:: After performing troubleshooting and repair regarding vehicle control history, clear the vehicle control history.

2.INSPECT COMBINATION METER ASSEMBLY

Perform the Active Test of the combination meter assembly using the GTS.

Body Electrical > Combination Meter > Active Test

Tester Display
EPS Warning

50004 409 128

Check the combination meter assembly.

OK:: The EPS warning light turns on or off in accordance with the GTS operation.

Result:

Proceed to
OK
NG

REPLACE POWER STEERING ECU ASSEMBLY

GO TO METER / GAUGE SYSTEM