RM3660EC _55 Steering _080761 POWER ASSIST SYSTEMS _0392052 POWER STEERING SYSTEM(for Gasoline Model) J

POWER ASSIST SYSTEMS  POWER STEERING SYSTEM(for Gasoline Model)  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.

PROCEDURE

1.CHECK VEHICLE CONTROL HISTORY (POWER STEERING SYSTEM)
a.

Connect the GTS to the DLC3.


b.

Turn the ignition switch to ON.


c.

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


d.

Using the GTS, check for Vehicle Control History.

Click hereSteering>POWER ASSIST SYSTEMS>POWER STEERING SYSTEM (for Gasoline Model)>VEHICLE CONTROL HISTORY

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 (for Optitron Meter Type (w/ Multi-information Display (for 7 Inch Display Type)), for TFT Meter Type (12.3 Inch Display)) A
Vehicle control history not stored for power steering ECU assembly (for Optitron Meter Type (w/ Multi-information Display (for 4.2 Inch Display Type))) B
Vehicle control history stored for power steering ECU assembly C



A

2.INSPECT COMBINATION METER ASSEMBLY

B

3.INSPECT COMBINATION METER ASSEMBLY

C

PERFORM TROUBLESHOOTING AND REPAIR REGARDING VEHICLE CONTROL HISTORY

Click hereSteering>POWER ASSIST SYSTEMS>POWER STEERING SYSTEM (for Gasoline Model)>VEHICLE CONTROL HISTORY

NOTICE:

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



2.INSPECT COMBINATION METER ASSEMBLY
a.

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

except 12.3 Inch Display: Click hereVehicle Interior>METER / GAUGE / DISPLAY>METER / GAUGE SYSTEM (except 12.3 Inch Display)>DATA LIST / ACTIVE TEST

for 12.3 Inch Display: Click hereVehicle Interior>METER / GAUGE / DISPLAY>METER / GAUGE SYSTEM (for 12.3 Inch Display)>DATA LIST / ACTIVE TEST

Body Electrical > Combination Meter > Active Test
Tester Display
Multi Display All (White)
50004 409 20

b.

Check the combination meter assembly.

OK:

The multi-information display in the combination meter assembly turns on according to the operation of the Active Test.



Result:
Proceed to
OK
NG



OK

REPLACE POWER STEERING ECU ASSEMBLY

Click hereSteering>POWER ASSIST SYSTEMS>POWER STEERING ECU>REMOVAL


NG

GO TO METER / GAUGE SYSTEM

except 12.3 Inch Display: Click hereVehicle Interior>METER / GAUGE / DISPLAY>METER / GAUGE SYSTEM (except 12.3 Inch Display)>HOW TO PROCEED WITH TROUBLESHOOTING

for 12.3 Inch Display: Click hereVehicle Interior>METER / GAUGE / DISPLAY>METER / GAUGE SYSTEM (for 12.3 Inch Display)>HOW TO PROCEED WITH TROUBLESHOOTING


3.INSPECT COMBINATION METER ASSEMBLY
a.

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

Click hereVehicle Interior>METER / GAUGE / DISPLAY>METER / GAUGE SYSTEM (except 12.3 Inch Display)>DATA LIST / ACTIVE TEST

Body Electrical > Combination Meter > Active Test
Tester Display
EPS Warning
50004 409 128

b.

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



OK

REPLACE POWER STEERING ECU ASSEMBLY

Click hereSteering>POWER ASSIST SYSTEMS>POWER STEERING ECU>REMOVAL


NG

GO TO METER / GAUGE SYSTEM

Click hereVehicle Interior>METER / GAUGE / DISPLAY>METER / GAUGE SYSTEM (except 12.3 Inch Display)>HOW TO PROCEED WITH TROUBLESHOOTING