VARIABLE GEAR RATIO STEERING SYSTEM, Diagnostic DTC:C15C1/74, C15C2/74

DTC Code DTC Name
C15C1/74 Steering Angle Sensor Malfunction
C15C2/74 Steering Angle Sensor B+ Malfunction

DESCRIPTION

The steering control ECU detects a steering angle sensor malfunction by receiving an error signal from the steering angle sensor via CAN communication. If the steering control ECU detects this error signal, it will turn the master warning light on, store these DTCs, and stop VGRS operation.

DTC Code DTC Detection Condition Trouble Area
C15C1/74 The steering control ECU receives a steering angle sensor malfunction signal via CAN communication.

  • Steering angle sensor

  • Harness or connector

  • CAN communication system

  • Steering control ECU
C15C2/74 The steering control ECU receives a B+ open circuit signal from the steering angle sensor via CAN communication.

  • Steering angle sensor

  • Harness or connector

  • CAN communication system

  • Steering control ECU

WIRING DIAGRAM

A01586LE16

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK DTC (CAN COMMUNICATION SYSTEM)


    1. Using the intelligent tester, check if the CAN communication system is functioning normally Click here for LHD, Click here for RHD).

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

    B

    GO TO CAN COMMUNICATION SYSTEM (DIAGNOSTIC TROUBLE CODE CHART) Click here

    C

    GO TO CAN COMMUNICATION SYSTEM (DIAGNOSTIC TROUBLE CODE CHART) Click here

    A

  2. CHECK HARNESS AND CONNECTOR (STEERING CONTROL ECU +B1 TERMINAL VOLTAGE)


    1. A0159IQE39

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      E77-10 (+B1) - Body ground Always 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK STEERING CONTROL ECU (+BO TERMINAL VOLTAGE)


    1. A0159IQE11

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      E79-1 (+BO) - Body ground Always 11 to 14 V
      Result

      Result

      		 Proceed to
      OK A
      NG (for LHD) B
      NG (for RHD) C

    B

    REPLACE STEERING CONTROL ECU Click here

    C

    REPLACE STEERING CONTROL ECU Click here

    A

  4. CHECK HARNESS AND CONNECTOR (STEERING ANGLE SENSOR)


    1. A0155KBE44

      Disconnect the E11 steering angle sensor connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      E11-1 (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
      E11-2 (ESS) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. CHECK STEERING ANGLE SENSOR


    1. A0155KBE45

      Disconnect the E11 steering angle sensor connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      E11-3 (BAT) - E11-2 (ESS) Engine switch on (IG) 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE STEERING ANGLE SENSOR Click here