ELECTRONIC POWER STEERING SYSTEM EPS Warning Light Circuit

DESCRIPTION

If the power steering ECU assembly detects a malfunction, the P/S warning light illuminates. At this time, the power steering ECU assembly records a DTC in its memory.

WIRING DIAGRAM

A0137VRE01

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (POWER STEERING ECU ASSEMBLY - COMBINATION METER ASSEMBLY)


    1. Check the indication of the PS warning while by wiggling the power steering ECU assembly connector and wire harness up and down, and right and left.

      OK
      PS warning indication does not change.

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. CHECK HARNESS AND CONNECTOR (POWER STEERING ECU ASSEMBLY - BODY GROUND)

    A0135ZNE02

    1. Disconnect the C24 connector from the power steering ECU assembly.

    2. Check the resistance between terminal PGND of the C24 connector and body ground.

      Standard Resistance
      Below 1 Ω or more

    3. Reconnect the connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT POWER STEERING ECU ASSEMBLY

    A0136DNE01

    1. Turn the ignition switch ON.

    2. Disconnect the C23 connector from the power steering ECU assembly, and check the P/S warning light goes OFF.

      OK
      P/S warning light comes on and then goes off

    3. Reconnect the connector.


    NG

    REPLACE POWER STEERING ECU ASSEMBLY

    OK

    GO TO COMBINATION METER SYSTEM