VEHICLE STABILITY CONTROL SYSTEM, Diagnostic DTC:C1434

DTC Code DTC Name
C1434 Steering Angle Sensor Output Malfunction

DESCRIPTION

Spiral cable sub-assembly (steering sensor) signals are sent to the skid control ECU (brake actuator assembly) via the CAN communication system. When there is a malfunction in the CAN communication system, it will be detected by the steering sensor zero point malfunction diagnostic function.

DTC NO. DTC Detection Condition Trouble Area
C1434 Error in communication between the skid control ECU (brake actuator assembly) and the spiral cable sub-assembly (steering sensor), or abnormal steering sensor zero point.

  • Steering sensor power supply

  • Spiral cable sub-assembly (steering sensor)

  • Skid control ECU (brake actuator assembly)

WIRING DIAGRAM

Refer to DTC C1432 Click here.

CAUTION / NOTICE / HINT

Note


  • Do not remove the steering sensor from the spiral cable sub-assembly.

  • When replacing the spiral cable sub-assembly (steering sensor), 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, U0124 and/or U0126 is output together with C1434, inspect and repair the trouble areas indicated by U0073, U0124 and/or U0126 first Click here.

  • When any of the speed sensors or the center airbag sensor assembly (yaw rate sensor) has trouble, DTCs for the spiral cable sub-assembly (steering sensor) may be output even when the spiral cable sub-assembly (steering sensor) is normal. When DTCs for the speed sensors or center airbag sensor assembly (yaw rate sensor) are output together with DTCs for the spiral cable sub-assembly (steering sensor), inspect and repair the speed sensor and center airbag sensor assembly (yaw rate sensor) first, and then inspect and repair the spiral cable sub-assembly (steering 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 deceleration 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 center airbag sensor assembly (yaw rate sensor), an abnormal value may be output although the spiral cable sub-assembly (steering sensor) is normal.

      • If speed sensor and center airbag sensor assembly (yaw rate sensor) DTCs are output simultaneously, repair these two sensors first and inspect the spiral cable sub-assembly (steering sensor).


    B

    CHECK CAN COMMUNICATION SYSTEM Click here

    C

    REPAIR CIRCUIT INDICATED BY OUTPUT DTC

    A

  2. CHECK TERMINAL VOLTAGE (IG, BAT)


    1. A005HVDE01
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Spiral Cable Sub-assembly (Steering sensor))

      Remove the steering wheel and the lower column cover.

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

    3. Disconnect the F30 spiral cable sub-assembly (steering sensor) connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      F30-5 (IG) - Body ground Ignition switch ON 11 to 14 V
      F30-6 (BAT) - Body ground Always 11 to 14 V

    5. Reconnect the F30 spiral cable sub-assembly (steering sensor) connector.

    6. Reinstall the steering wheel and the lower column cover.

      Result
      Result Proceed to
      OK A
      NG (w/o Stop and Start System) B
      NG (w/ Stop and Start System for 1NR-FE) C
      NG (for 1NZ-FE) D

    B

    REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)

    C

    GO TO STOP AND START SYSTEM Click here

    D

    GO TO STOP AND START SYSTEM Click here

    A

  3. CHECK HARNESS AND CONNECTOR (GROUND TERMINAL)


    1. A005HM6E01
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Spiral Cable Sub-assembly (Steering sensor))

      Turn the ignition switch off.

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

    3. Disconnect the F30 spiral cable sub-assembly (steering sensor) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F30-2 (ESS) - Body ground Always Bellow 1Ω

      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

    5. Reconnect the F30 spiral cable sub-assembly (steering sensor) connector.

    6. Reinstall the steering wheel and the lower column cover.


    OK

    REPLACE SPIRAL CABLE SUB-ASSEMBLY (STEERING SENSOR) Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (GROUND CIRCUIT)