VARIABLE GEAR RATIO STEERING SYSTEM, Diagnostic DTC:C15A3/63, C15C5/69

DTC Code DTC Name
C15A3/63 Motor Rotation Angle Not Detected
C15C5/69 Motor Rotation Signal Not Detected

DESCRIPTION

The steering actuator assembly drives the internal motor using the current output from the VGRS ECU (steering control ECU) to change the relative angle between the tire angle and steering wheel angle.

The motor rotation angle sensor in the steering actuator assembly detects the motor rotation angle and outputs this information to the VGRS ECU (steering control ECU).

If the VGRS ECU (steering control ECU) detects a malfunction in the motor rotation angle sensor circuit, it stores DTC C15A3/63.

The test mode DTC C15C5/69 is only stored during test mode.

DTC No. DTC Detection Condition Trouble Area
C15A3/63

All conditions are met for approximately 0.03 seconds or more:


  • 2 seconds or more elapse after turning the engine switch on (IG).

  • 2 seconds or more elapse with the power source voltage at 10 V or higher.

  • A problem with the motor rotation angle sensor is detected.

  • Steering actuator assembly

  • VGRS ECU (steering control ECU)

  • Harness or connector
C15C5/69 The system enters test mode.

  • Steering actuator assembly

  • VGRS ECU (steering control ECU)

  • Harness or connector

WIRING DIAGRAM

B001XUPE13

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.

  • Since DTC C1289 is stored in the skid control ECU (master cylinder solenoid), after performing repairs on the VGRS system, clear the DTCs for the vehicle stability control system.

PROCEDURE


  1. CHECK DTC


    1. Check for DTCs Click here.

      Result
      Result Proceed to

      • DTC C15A3/63 is output as a current DTC

      • When the engine is started and the steering wheel is operated, DTC C15A3/63 is output as a current DTC.

      		 A
      When the engine is started and a wire harness is jiggled, DTC C15A3/63 is output as a current DTC. B
      DTC C15A3/63 is not output as a current DTC C

    B

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    C

    USE SIMULATION METHOD TO CHECK Click here

    A

  2. CHECK FRAME DATA (MOTOR RESOLVER SIN PHASE OFFSET,MOTOR RESOLVER COS PHASE OFFSET)


    1. Turn the engine switch off.

    2. Connect the GTS to the DLC3.

    3. Turn the engine switch on (IG).

    4. Turn the GTS on.

    5. Display the DTCs on the GTS screen Click here.

    6. Select DTC "C15A3/63", and check the freeze frame data for "Motor Resolver SIN Phase Offset" and "Motor Resolver COS Phase Offset" Click here.

      Result
      Result Proceed to
      "Motor Resolver SIN Phase Offset" and "Motor Resolver COS Phase Offset" are 5 V or higher A
      "Motor Resolver SIN Phase Offset" and "Motor Resolver COS Phase Offset" are below 5 V (for LHD) B
      "Motor Resolver SIN Phase Offset" and "Motor Resolver COS Phase Offset" are below 5 V (for RHD) C

    B

    REPLACE VGRS ECU (STEERING CONTROL ECU) Click here

    C

    REPLACE VGRS ECU (STEERING CONTROL ECU) Click here

    A

  3. INSPECT STEERING ACTUATOR ASSEMBLY


    1. Turn the engine switch off.

    2. B001W97E02
      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
      E162-9 (RV) - E162-8 (RG) Always 20 to 60 Ω
      E162-3 (S1) - E162-8 (RG) Always 70 to 160 Ω
      E162-5 (S2) - E162-8 (RG) Always 60 to 150 Ω
      E162-9 (RV) - E162-3 (S1) Always 90 to 220 Ω
      E162-9 (RV) - E162-5 (S2) Always 80 to 210 Ω
      E162-3 (S1) - E162-5 (S2) Always 130 to 310 Ω
      E162-3 (S1) - Body ground Always 100 kΩ or higher
      E162-5 (S2) - Body ground Always 100 kΩ or higher
      E162-8 (RG) - Body ground Always 100 kΩ or higher
      E162-9 (RV) - 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
      E162-3 (S1) - E80-2 (S1+) Always Below 1 Ω
      E162-5 (S2) - E80-9 (S2+) Always Below 1 Ω
      E162-8 (RG) - E80-10 (RG+) Always Below 1 Ω
      E162-9 (RV) - E80-1 (RV+) Always Below 1 Ω
      E162-9 (RV) - E162-8 (RG) Always 20 to 60 Ω
      E162-3 (S1) - E162-8 (RG) Always 70 to 160 Ω
      E162-5 (S2) - E162-8 (RG) Always 60 to 150 Ω
      E162-9 (RV) - E162-3 (S1) Always 90 to 220 Ω
      E162-9 (RV) - E162-5 (S2) Always 80 to 210 Ω
      E162-3 (S1) - E162-5 (S2) Always 130 to 310 Ω
      E162-3 (S1) or E80-2 (S1+) - Body ground Always 100 kΩ or higher
      E162-5 (S2) or E80-9 (S2+) - Body ground Always 100 kΩ or higher
      E162-8 (RG) or E80-10 (RG+) - Body ground Always 100 kΩ or higher
      E162-9 (RV) or E80-1 (RV+) - Body ground Always 100 kΩ or higher

    OK

    REPLACE STEERING ACTUATOR ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR