VARIABLE GEAR RATIO STEERING SYSTEM, Diagnostic DTC:C15A5/65

DTC Code DTC Name
C15A5/65 Lock Mechanism Circuit

DESCRIPTION

If the VGRS ECU (steering control ECU) detects a malfunction in the lock mechanism, it turns the master warning light on, and stores DTC C15A5/65.

DTC No. DTC Detection Condition Trouble Area
C15A5/65

Both conditions are met for approximately 0.025 seconds or more:


  • The engine switch is on (IG).

  • A short in the motor circuit or an internal malfunction in the ECU is detected.

  • Steering actuator assembly

  • VGRS ECU (steering control ECU)

  • Harness or connector

WIRING DIAGRAM

Refer to DTC C15A3/63 Click here.

CAUTION / NOTICE / HINT

Note

When replacing the VGRS ECU (steering control ECU) or steering actuator assembly, perform actuator angle neutral point calibration and initialization after replacing parts Click here.

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (LV, LG TERMINAL)


    1. B001VM5E02
      Text in Illustration
      *a

      Component with harness connected

      (VGRS ECU [Steering Control ECU])

      Turn the engine switch on (IG).

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

      Tech Tips

      With the connector connected to the VGRS ECU (steering control ECU), measure the voltage from the rear of the connector.

      Standard Voltage
      Tester Connection Condition Specified Condition
      E162-2 (LV) - Body ground Engine switch on (IG) 11 to 14 V
      E162-6 (LG) - Body ground Engine switch on (IG) 11 to 14 V

    NG

    INSPECT STEERING ACTUATOR ASSEMBLY Click here

    OK

  2. READ VALUE USING GTS (LOCK SOLENOID VOLTAGE)


    1. Turn the engine switch off.

    2. Connect the GTS to the DLC3.

    3. Start the engine.

    4. Turn the GTS on.

    5. Enter the following menus: Chassis / VGRS / Data List.

      VGRS
      Tester Display Measurement Item /Range Normal Condition Diagnostic Note
      Lock Solenoid Voltage

      Lock solenoid voltage/

      Min.: 0.00 V

      Max.: 255.99 V

      		 0 to 14 V -
      OK
      0 to 14 V (while the engine is being started)
      Result
      Result Proceed to
      OK A
      NG (for LHD) B
      NG (for RHD) C

    A

    USE SIMULATION METHOD TO CHECK Click here

    B

    REPLACE VGRS ECU (STEERING CONTROL ECU) Click here

    C

    REPLACE VGRS ECU (STEERING CONTROL ECU) Click here

  3. INSPECT STEERING ACTUATOR ASSEMBLY


    1. Turn the engine switch off.

    2. B001ZTQE02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to VGRS ECU [Steering Control ECU])

      Disconnect the E162 VGRS ECU (steering control ECU) connector.

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

      Tech Tips


      • Measure the resistance of the steering actuator assembly at the connector of the VGRS ECU (steering control ECU).

      Standard Resistance
      Tester Connection Condition Specified Condition
      E162-2 (LV) - E162-6 (LG) Always 10 to 30 Ω
      E162-2 (LV) - Body ground Always 100 kΩ or higher
      E162-6 (LG) - Body ground Always 100 kΩ or higher
      Result
      Result Proceed to
      OK (for LHD) A
      OK (for RHD) B
      NG C

    A

    REPLACE VGRS ECU (STEERING CONTROL ECU) Click here

    B

    REPLACE VGRS ECU (STEERING CONTROL ECU) Click here

    C

  4. CHECK HARNESS AND CONNECTOR (VGRS ECU (STEERING CONTROL ECU) - STEERING ACTUATOR ASSEMBLY)


    1. Turn the engine switch off.

    2. Disconnect the E162 VGRS ECU (steering control ECU) connector.

    3. Disconnect the E80 steering actuator assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E162-2 (LV) - E80-7 (LV+) Always Below 1 Ω
      E162-6 (LG) - E80-16 (LG+) Always Below 1 Ω
      E162-2 (LV) - E80-6 (LG) Always 10 to 30 Ω
      E162-2 (LV) or E80-7 (LV+) - Body ground Always 100 kΩ or higher
      E162-6 (LG) or E80-16 (LG+) - Body ground Always 100 kΩ or higher

    OK

    REPLACE STEERING ACTUATOR ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR