ELECTRONICALLY CONTROLLED BRAKE SYSTEM(w/ Vacuum Brake Booster), Diagnostic DTC:C1432

DTC Code DTC Name
C1432 Steering Angle Sensor Power Source Voltage Malfunction

DESCRIPTION

This DTC is stored when the skid control ECU (brake actuator assembly) receives a power supply open signal from the steering sensor.

DTC No. Detection Item DTC Detection Condition Trouble Area Note
C1432 Steering Angle Sensor Power Source Voltage Malfunction Steering angle sensor power supply malfunction signal is received from steering angle sensor.

  • ECU-B D NO. 2 fuse*1

  • Backup boost converter circuit*3

  • IG1 D NO. 3 fuse*4

  • ECU-B P NO. 1 fuse*2

  • Steering sensor power supply

  • Steering sensor

  • Wire harness or connector

  • VGRS ECU (front steering control ECU)*2

 -

WIRING DIAGRAM

Refer to DTC C1434.

Click here

CAUTION / NOTICE / HINT

Note

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

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (IG1 TERMINAL)


    1. Turn the engine switch off.

    2. Remove the steering wheel and column cover.

    3. Make sure that there is no looseness at the locking part and the connecting part of the connector.

    4. Disconnect the G30*1 or G29*2 steering sensor connector.

      *1: w/o Variable Gear Ratio Steering System

      *2: w/ Variable Gear Ratio Steering System

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


      1. w/ Stop and Start System:

        Standard Voltage
        w/o Variable Gear Ratio Steering System
        Tester Connection Condition Specified Condition
        G30-9 (IG1) - Body ground Engine switch on (IG) 10.5 to 16 V
        w/ Variable Gear Ratio Steering System
        Tester Connection Condition Specified Condition
        G29-9 (IG1) - Body ground Engine switch on (IG) 10.5 to 16 V

      2. w/o Stop and Start System:

        Standard Voltage
        w/o Variable Gear Ratio Steering System
        Tester Connection Condition Specified Condition
        G30-9 (IG1) - Body ground Engine switch on (IG) 11 to 14 V
        w/ Variable Gear Ratio Steering System
        Tester Connection Condition Specified Condition
        G29-9 (IG1) - Body ground Engine switch on (IG) 11 to 14 V
      Result
      Proceed to
      OK
      NG (w/ Stop and Start System)
      NG (w/o Stop and Start System)

    NG (w/ Stop and Start System)

    INSPECT STOP AND START SYSTEM (BACKUP BOOST CONVERTER CIRCUIT) for 8GR-FKS: Click here
    INSPECT STOP AND START SYSTEM (BACKUP BOOST CONVERTER CIRCUIT) for V35A-FTS: Click here

    NG (w/o Stop and Start System)

    REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)

    OK

  2. CHECK HARNESS AND CONNECTOR (BAT TERMINAL)


    1. Turn the engine switch off.

    2. Remove the steering wheel and column cover.

    3. Make sure that there is no looseness at the locking part and the connecting part of the connector.

    4. Disconnect the G30*1 or G29*2 steering sensor connector.

      *1: w/o Variable Gear Ratio Steering System

      *2: w/ Variable Gear Ratio Steering System

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

      Standard Voltage
      w/o Variable Gear Ratio Steering System
      Tester Connection Condition Specified Condition
      G30-4 (BAT) - Body ground Always 11 to 14 V
      w/ Variable Gear Ratio Steering System
      Tester Connection Condition Specified Condition
      G29-4 (BAT) - Body ground Always 11 to 14 V
      Result
      Proceed to
      OK
      NG (w/o Variable Gear Ratio Steering System)
      NG (w/ Variable Gear Ratio Steering System)

    NG (w/o Variable Gear Ratio Steering System)

    REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)

    NG (w/ Variable Gear Ratio Steering System)

    CHECK HARNESS AND CONNECTOR (VGRS ECU [FRONT STEERING CONTROL ECU] - STEERING SENSOR) Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (GROUND TERMINAL)


    1. Turn the engine switch off.

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

      Note

      Before measuring the resistance of the steering sensor, turn the engine switch off and leave the vehicle for 1 minute or more without operating the key or switches, or opening or closing the doors.

      Standard Resistance
      w/o Variable Gear Ratio Steering System
      Tester Connection Condition Specified Condition
      G30-6 (ESS) - Body ground 1 minute after engine switch off Below 1 Ω
      w/ Variable Gear Ratio Steering System
      Tester Connection Condition Specified Condition
      G29-6 (ESS) - Body ground 1 minute after engine switch off Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE STEERING SENSOR Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (GROUND CIRCUIT)

  4. CHECK HARNESS AND CONNECTOR (VGRS ECU [FRONT STEERING CONTROL ECU] - STEERING SENSOR)


    1. Disconnect the G79 VGRS ECU (front steering control ECU) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G79-1 (+BO) - G29-4 (BAT) Always Below 1 Ω
      G79-1 (+BO) or G29-4 (BAT) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. CHECK HARNESS AND CONNECTOR (VGRS ECU [FRONT STEERING CONTROL ECU])


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

      Standard Voltage
      Tester Connection Condition Specified Condition
      G79-7 (+BI) - Body ground Always 11 to 14 V
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE VGRS ECU (FRONT STEERING CONTROL ECU) Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR