POWER STEERING SYSTEM(w/ Variable Flow Control Solenoid Valve) Power Steering Warning Light Circuit

DESCRIPTION

The power steering ECU is connected to the combination meter via CAN communication. If the power steering ECU detects a malfunction, the power steering warning light comes on. At this time, the vehicle enters fail-safe mode.

WIRING DIAGRAM

A01WUU6E15

CAUTION / NOTICE / HINT

Note

Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE


  1. INSPECT CAN COMMUNICATION SYSTEM


    1. Check for DTCs of the CAN communication system.

      for LHD

      Refer to the following procedures Click here.

      for RHD

      Refer to the following procedures Click here.

      Result
      Result Proceed to
      DTC is not output. A
      DTC is output. for LHD B
      for RHD C

    B

    GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) Click here

    C

    GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) Click here

    A

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


    1. A01WPKGE02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Power Steering ECU)

      Disconnect the power steering ECU connector.

    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      E141-5 (IG) - Body ground Engine switch on (IG) 11 to 14 V

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      E141-3 (GND) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. PERFORM ACTIVE TEST USING GTS (METER/GAUGE SYSTEM)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG) and turn the GTS on.

    3. Perform the Active Test of the combination meter using GTS Click here.

      Combination Meter
      Tester Display Test Part Control Range Diagnostic Note
      PPS Indicator Power steering warning light ON or OFF Perform the test with the vehicle stopped and the engine idling.

    4. Check that the power steering warning light operates in accordance with the Active Test.

      Tech Tips

      Reconnect the connectors and restore the vehicle to its previous condition before checking the combination meter.

      OK
      The power steering warning light turns on and off in accordance with GTS operation.
      Result
      Result Proceed to
      OK for LHD A
      for RHD B
      NG C

    A

    REPLACE POWER STEERING ECU ASSEMBLY Click here

    B

    REPLACE POWER STEERING ECU ASSEMBLY Click here

    C

    INSPECT METER/GAUGE SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) Click here