DTC    C1434    Steering Angle Sensor Output Malfunction

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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.
  1. Steering angle sensor power supply
  2. Steering angle sensor (built into the spiral cable)
  3. Brake actuator assembly (Skid control ECU)

WIRING DIAGRAM

Refer to DTC C1432 (Click here).

INSPECTION PROCEDURE

NOTICE:
  1. Do not remove the steering sensor from the spiral cable.
  2. When replacing the spiral cable, confirm that the replacement part is of the correct specification.
  3. Inspect the fuses for circuits related to this system before performing the following inspection procedure.

HINT:
  1. 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).
  2. 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.

1.CHECK DTC

  1. Clear the DTCs (Click here).

  1. Turn the ignition switch off.

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

  1. Start the engine.

  1. 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

    HINT:
    1. 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.
    2. 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)


    C197050E03

  1. Turn the ignition switch off.
    Text in Illustration 
    *1
    		Front view of wire harness connector
    (to Steering Angle Sensor)

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

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

  1. Disconnect the D20 steering angle sensor connector.

  1. 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)


    C197050E04

  1. Turn the ignition switch ON.
    Text in Illustration 
    *1
    		Front view of wire harness connector
    (to Steering Angle Sensor)

  1. 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)


    C197050E02

  1. Turn the ignition switch off.
    Text in Illustration 
    *1
    		Front view of wire harness connector
    (to Steering Angle Sensor)

  1. 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

    HINT:
    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)