VEHICLE STABILITY CONTROL SYSTEM, Diagnostic DTC:C1434

DTC Code DTC Name
C1434 Steering Angle Sensor Output Malfunction

DESCRIPTION

The skid control ECU (brake actuator assembly) receives signals from the steering angle sensor (spiral cable with sensor sub-assembly) via CAN communication.

Tech Tips

When a malfunction occurs in the communication line to the steering sensor, U0126 is output.

If a DTC related to the CAN communication line is output, first troubleshoot the CAN communication line.

DTCs may be stored if one of the following occurs:


DTC No. Detection Item DTC Detection Condition Trouble Area Note
C1434 Steering Angle Sensor Output Malfunction Normal communication between the skid control ECU and the steering sensor and abnormal steering sensor zero point.

  • Steering angle sensor (spiral cable with sensor sub-assembly) power supply

  • Steering angle sensor (spiral cable with sensor sub-assembly)

  • RH ECU-IG fuse*1

  • LH ECU-IG fuse*2

  • MPX-B fuse

  • Wire harness or connector

 -

WIRING DIAGRAM

B002C9NE04

CAUTION / NOTICE / HINT

Note

Inspect the fuses for circuits related to this system before performing the following 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 a speed sensor, or the acceleration sensor (yaw rate sensor) is malfunctioning, DTCs for the steering angle sensor (spiral cable with sensor sub-assembly) may be stored even though the steering angle sensor (spiral cable with sensor sub-assembly) is normal. When DTCs for a speed sensor, or acceleration sensor (yaw rate sensor) are output together with DTCs for the steering angle sensor (spiral cable with sensor sub-assembly), inspect and repair the speed sensor or acceleration sensor (yaw rate sensor) first, and then inspect and repair the steering angle sensor (spiral cable with sensor sub-assembly).

PROCEDURE


  1. CHECK DTC


    1. Clear the DTCs.

      Click here


      Chassis > ABS/VSC/TRC > Clear DTCs

    2. Turn the engine switch off.

    3. Turn the engine switch on (IG) again and check that no CAN communication system DTCs are output.

      for LHD: Click here

      for RHD: 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 acceleration sensor (yaw rate sensor) DTCs are output.

      Click here


      Chassis > ABS/VSC/TRC > Trouble Codes
      Result
      Result Proceed to
      No CAN communication system, speed sensor, or acceleration sensor (yaw rate sensor) DTCs are output. A
      CAN communication system DTCs are output. (for LHD) B
      CAN communication system DTCs are output. (for RHD) C
      Speed sensor and/or acceleration sensor (yaw rate sensor) DTCs are output. D

      Tech Tips


      • If a speed sensor, or the acceleration sensor (yaw rate sensor) is malfunctioning, DTCs for the steering angle sensor (spiral cable with sensor sub-assembly) may be stored even though the steering angle sensor (spiral cable with sensor sub-assembly) is normal.

      • If speed sensor and acceleration sensor (yaw rate sensor) DTCs are output simultaneously, repair these malfunctions and then inspect the steering angle sensor (spiral cable with sensor sub-assembly).


    B

    INSPECT CAN COMMUNICATION SYSTEM Click here

    C

    INSPECT CAN COMMUNICATION SYSTEM Click here

    D

    REPAIR CIRCUITS INDICATED BY OUTPUT DTCS Click here

    A

  2. CHECK HARNESS AND CONNECTOR (POWER SOURCE TERMINAL)


    1. B002EV6C35
      *a

      Front view of wire harness connector

      (to Steering Angle Sensor (Spiral Cable with Sensor Sub-assembly))

      Remove the steering wheel and column cover.

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

    3. Disconnect the K28 steering angle sensor (spiral cable with sensor sub-assembly) connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      K28-8 (BAT) - Body ground Always 11 to 14 V
      K28-4 (IG1) - Body ground Engine switch on (IG) 11 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)

    OK

  3. CHECK HARNESS AND CONNECTOR (GROUND TERMINAL)


    1. B002EV6C36
      *a

      Front view of wire harness connector

      (to Steering Angle Sensor (Spiral Cable with Sensor Sub-assembly))

      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 angle sensor (spiral cable with sensor sub-assembly), 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
      Tester Connection Condition Specified Condition
      K28-1 (ESS) - Body ground 1 minute after turning engine switch off 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

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (GROUND CIRCUIT)