VEHICLE STABILITY CONTROL SYSTEM, Diagnostic DTC:C1434

DTC Code DTC Name
C1434 Steering Angle Sensor Output Malfunction

DESCRIPTION

Steering angle sensor signals are input to the skid control ECU (brake actuator assembly) via the CAN communication system.

Tech Tips

When a malfunction occurs in the communication line to the steering angle 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. DTC Detection Condition Trouble Area
C1434 Normal communication between the skid control ECU and the steering angle sensor and abnormal steering angle sensor zero point.

  • Sensor installation

  • Wire harness or connector

  • Steering angle sensor

  • Skid control ECU (brake actuator assembly)

  • Backup boost converter circuit (w/ stop and start system)

WIRING DIAGRAM

Refer to DTC C1432 Click here.

CAUTION / NOTICE / HINT

Note

Inspect the fuses for circuits related to this system before performing the following inspection procedure (w/o Stop and Start System).

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 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 sensor, 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 engine switch off.

    3. Turn the engine switch on (IG) again and check that no CAN communication system DTCs are output (See page for with Central Gateway ECU, Click here for without Central Gateway ECU).

    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 to 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 DTCs are output (w/ Central Gateway ECU). B
      CAN communication system DTCs are output (w/o Central Gateway ECU). C
      Speed sensor and/or yaw rate and acceleration sensor DTCs are output. D

      Tech Tips


      • If there is a malfunction in a speed sensor, or the 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

    INSPECT CAN COMMUNICATION SYSTEM Click here

    D

    REPAIR CIRCUITS INDICATED BY OUTPUT DTCS Click here

    A

  2. CHECK STEERING ANGLE SENSOR INSTALLATION


    1. Turn the engine switch off.

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

      OK
      The steering angle sensor installation is normal.

    NG

    INSTALL STEERING ANGLE SENSOR CORRECTLY Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (BAT TERMINAL)


    1. A01W56HE01
      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 connectors.

    3. Disconnect the H23 steering angle sensor connectors.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      H23-5 (BAT) - Body ground Always 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (BAT CIRCUIT)

    OK

  4. CHECK HARNESS AND CONNECTOR (IG TERMINAL)


    1. A01W2DIE04
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Steering Angle Sensor)

      Turn the engine switch on (IG).

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      H23-4 (IG) - Body ground Engine switch on (IG) 10.5 to 16 V
      Result
      Result Proceed to
      OK A
      NG (w/o Stop and Start System) B
      NG (w/ Stop and Start System) C

    B

    REPAIR OR REPLACE HARNESS OR CONNECTOR (IG CIRCUIT)

    C

    INSPECT STOP AND START SYSTEM (BACKUP BOOST CONVERTER CIRCUIT) Click here

    A

  5. CHECK HARNESS AND CONNECTOR (ESS TERMINAL)


    1. A01W36TE01
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Steering Angle Sensor)

      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, turn the engine switch off and leave the vehicle for 1 minute or more without operating the key, switches or opening or closing the doors.

      Standard Resistance
      Tester Connection Condition Specified Condition
      H23-1 (ESS) - Body ground 1 minute after 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.


    OK

    REPLACE STEERING ANGLE SENSOR Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (ESS CIRCUIT)