VEHICLE STABILITY CONTROL SYSTEM, Diagnostic DTC:C1434

DTC Code DTC Name
C1434 Steering Angle Sensor Output Malfunction

DESCRIPTION

The skid control ECU receives signals from the steering angle sensor via the CAN communication system.

Tech Tips

If there is trouble in the bus lines between the steering angle sensor and the CAN communication system, DTC U0126 (Lost Communication with Steering Angle Sensor Module) is output. When U0126 is output together with C1434, inspect and repair the trouble areas indicated by U0126 first.

DTCs may be stored if one of the following occurs:


DTC No. DTC Detection Condition Trouble Area
C1434

Any of the following is detected:


  1. The difference between zero point stored in the steering angle sensor and the estimated zero point exceeds 15 deg.

  2. The offset value of the steering angle sensor is -13.5 deg. or less or 13.5 deg. or more.

  3. The steering angle sensor value exceeds a specified value for 0.3 seconds or more.

  4. The change of the steering angle sensor value within 0.02 seconds is abnormal.

  5. The steering angle sensor value changes by less than 5 deg. and both left and right turns have been recognized.

  6. There is a difference between the skid control ECU estimated value and the steering angle sensor value due to an abnormal steering angle sensor value.

  • Sensor installation

  • Steering angle sensor power supply

  • Steering angle sensor

  • Skid control ECU (Brake actuator assembly)

WIRING DIAGRAM

A01HMM8E39

INSPECTION PROCEDURE

Tech Tips


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

  • When any of the speed sensors or yaw rate and acceleration sensor (airbag sensor assembly) is malfunctioning, DTCs for the steering angle sensor may be stored even though the steering angle sensor is normal. When DTCs for the speed sensors or yaw rate and acceleration sensor (airbag sensor assembly) are output together with DTCs for the steering angle sensor, inspect and repair the speed sensor and yaw rate and acceleration sensor (airbag sensor assembly) 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 at a speed of 35 km/h (22 mph) and turn the steering wheel to the right and left and then 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 and/or yaw rate and acceleration sensor DTC is output. C

      Tech Tips


      • If there is a malfunction in any of the speed sensors or yaw rate and acceleration sensor (airbag sensor assembly), DTCs for the steering angle sensor may be stored even though the steering angle sensor is normal.

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


    B

    INSPECT CAN COMMUNICATION SYSTEM Click here

    C

    REPAIR CIRCUITS INDICATED BY OUTPUT DTCS Click here

    A

  2. CHECK STEERING ANGLE SENSOR INSTALLATION


    1. Turn the ignition switch off.

    2. Check that the steering angle sensor has been installed properly Click here.

      OK
      The steering angle sensor installation are normal.

    NG

    INSTALL STEERING ANGLE SENSOR CORRECTLY Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (POWER SOURCE TERMINAL)


    1. A01HMLIE40
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Steering Angle Sensor)

      Remove the steering wheel and the column cover.

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

    3. Disconnect the steering angle sensor connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      I29-5 (BAT) - Body ground Always 11 to 14 V
      I29-4 (IG) - Body ground Ignition switch ON 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)

    OK

  4. CHECK HARNESS AND CONNECTOR (GROUND TERMINAL)


    1. A01HMLIE41
      Text in Illustration
      *a

      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
      I29-1 (ESS) - Body ground Always Below 1 Ω

      Tech Tips

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


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (GROUND CIRCUIT)

    OK

    REPLACE STEERING ANGLE SENSOR Click here