VEHICLE STABILITY CONTROL SYSTEM, Diagnostic DTC:C1434

DTC Code DTC Name
C1434 Steering Angle Sensor Output Malfunction

DESCRIPTION

Steering angle sensor signals are sent to the skid control ECU via the CAN communication system. When there is a malfunction in the CAN communication system, it will be detected by the steering angle sensor zero point malfunction diagnostic function.

DTC Code DTC Detection Condition Trouble Area
C1434 Error in communication between the skid control ECU and the steering angle sensor, or abnormal steering angle sensor zero point.

  • Steering angle sensor power supply

  • Steering angle sensor (built into the spiral cable)

  • Brake actuator assembly (Skid control ECU)

WIRING DIAGRAM

Refer to DTC C1432 Click here.

INSPECTION PROCEDURE

Note


  • Do not remove the steering sensor from the spiral cable.

  • When replacing the spiral cable, confirm that the replacement part is of the correct specification.

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

Tech Tips


  • When U0073, U0123, U0124 and/or U0126 is output together with C1434, inspect and repair the trouble areas indicated by U0073, U0123, U01245 and/or U0126 first Click here.

  • When any of the speed sensors or the yaw rate and acceleration sensor has trouble, DTCs for the steering angle sensor may be output even when the steering angle sensor is normal. When DTCs for the speed sensors or yaw rate and acceleration sensor are output together with DTCs for the steering angle sensor, inspect and repair the speed sensor and yaw rate and acceleration sensor first, and then inspect and repair the steering angle sensor.

PROCEDURE


  1. CHECK DTC


    1. Clear the DTCs Click here.

    2. Turn the ignition switch off.

    3. Turn the ignition switch to ON again and check that no CAN communication system DTC is output Click here.

    4. Start the engine.

    5. Drive the vehicle and turn the steering wheel to the right and left at a speed of 35 km/h (22 mph) and check that no speed sensor or yaw rate and acceleration sensor DTCs are output Click here.

      Result
      Result Proceed to
      No CAN communication system, speed sensor, or yaw rate and acceleration sensor DTCs are output A
      CAN communication system DTC is output B
      Speed sensor or yaw rate and acceleration sensor DTC is output C

      Tech Tips


      • If there is a malfunction in any of the speed sensors or the yaw rate and acceleration sensor, an abnormal value may be output although the steering angle sensor is normal.

      • If speed sensor and yaw rate and acceleration sensor DTCs are output simultaneously, repair these two sensors first and inspect the steering angle sensor.


    B

    CHECK CAN COMMUNICATION SYSTEM Click here

    C

    REPAIR CIRCUIT INDICATED BY OUTPUT DTC Click here

    A

  2. INSPECT STEERING ANGLE SENSOR (BAT TERMINAL)


    1. A011BGJE03
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Steering Angle Sensor)

      Turn the ignition switch off.

    2. Remove the steering wheel and the column cover lower.

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

    4. Disconnect the D20 steering angle sensor connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      D20-6 (BAT) - Body ground Always 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (BAT CIRCUIT)

    OK

  3. INSPECT STEERING ANGLE SENSOR (IG1 TERMINAL)


    1. A011BGJE04
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Steering Angle Sensor)

      Turn the ignition switch ON.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      D20-5 (IG) - Body ground Ignition switch ON 11 to 14 V
      Result
      Result Proceed to
      OK A
      NG (w/ Stop and Start System) B
      NG (w/o Stop and Start System) C

    B

    GO TO STOP AND START SYSTEM Click here

    C

    REPAIR OR REPLACE HARNESS OR CONNECTOR (IG1 CIRCUIT)

    A

  4. INSPECT STEERING ANGLE SENSOR (GND TERMINAL)


    1. A011BGJE02
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Steering Angle Sensor)

      Turn the ignition switch off.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      D20-2 (ESS) - Body ground Always Below 1 Ω

      Tech Tips

      If troubleshooting has been carried out according to the Problem Symptoms Table, refer back to the table and proceed to the next step Click here.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (GND CIRCUIT)

    OK

    REPLACE SPIRAL CABLE (STEERING ANGLE SENSOR) Click here