Electronic Power Steering System - Ps Warning Light Does Not Come On

Lexus IS250 IS220d GSE20 ALE20 - POWER STEERING

WIRING DIAGRAM

INSPECTION PROCEDURE

INSPECT CAN COMMUNICATION SYSTEM

INSPECT MULTIPLEX COMMUNICATION SYSTEM

INSPECT COMBINATION METER ASSEMBLY

ELECTRONIC POWER STEERING SYSTEM - PS Warning Light does not Come ON

WIRING DIAGRAM

Electronic Power Steering System - Ps Warning Light Does Not Come On. POWER STEERING. Lexus IS250 IS220d GSE20 ALE20

INSPECTION PROCEDURE

1.INSPECT CAN COMMUNICATION SYSTEM

Using the intelligent tester, check for DTCs and confirm that there are no problems in the CAN communication system.

  • OK:
  • DTCs are not output.
NG
GO TO CAN COMMUNICATION SYSTEM
OK
2.INSPECT MULTIPLEX COMMUNICATION SYSTEM

Using the intelligent tester, check for DTCs and confirm that there are no problems in the multiplex communication system (BEAN).

  • OK:
  • DTCs are not output.
NG
GO TO MULTIPLEX COMMUNICATION SYSTEM
OK
3.INSPECT COMBINATION METER ASSEMBLY

Connect the intelligent tester to the DLC3.

Turn the engine switch on (IG).

Perform the Active Test according to the display on the tester.

Combination Meter:
ItemTest DetailsDiagnostic Note
Indicat EPSPS indicator light OFF/ON-
  • OK:
  • PS indicator light comes on.
  • NOTICE:
  • If replacing the power steering ECU assembly, initialize the rotation angle sensor value and calibrate the torque sensor zero point .
NG
REPLACE COMBINATION METER ASSEMBLY
OK
REPLACE POWER STEERING ECU ASSEMBLY