C1434

BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM: C1434: Steering Angle Sensor Output Malfunction
C1434 - Steering Angle Sensor Output Malfunction

DESCRIPTION

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

HINT
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:

* Steering angle sensor zero point value malfunction.

* Steering angle sensor signal malfunction.

* Steering angle sensor signal stuck malfunction.

* Steering angle sensor and the yaw rate sensor values inconsistent.

* Steering angle sensor installation abnormality.





WIRING DIAGRAM





INSPECTION PROCEDURE

HINT
* 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 Vehicle Stability Control System.
* When any of the speed sensors, yaw rate and acceleration sensor (for separate type) or yaw rate and acceleration sensor (airbag sensor assembly) (for built-in type) 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, yaw rate and acceleration sensor (for separate type) or yaw rate and acceleration sensor (airbag sensor assembly) (for built-in type) are output together with DTCs for the steering angle sensor, inspect and repair the speed sensor, yaw rate and acceleration sensor (for separate type) and/ or yaw rate and acceleration sensor (airbag sensor assembly) (for built-in type) first, and then inspect and repair the steering angle sensor.

PROCEDURE

1. CHECK DTC

(a) Clear the DTCs Reading and Clearing Diagnostic Trouble Codes.

(b) Turn the ignition switch off.

(c) Turn the ignition switch to ON again and check that no CAN communication system DTC is output Diagnosis System.

(d) Start the engine.

(e) 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 Reading and Clearing Diagnostic Trouble Codes.

Result:





HINT
* If there is a malfunction in any of the speed sensors, yaw rate and acceleration sensor (for separate type) or yaw rate and acceleration sensor (airbag sensor assembly) (for built-in type), 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 How to Proceed With Troubleshooting

C -- REPAIR CIRCUITS INDICATED BY OUTPUT DTCS Vehicle Stability Control System
A -- Continue to next step.

2. CHECK STEERING ANGLE SENSOR INSTALLATION

(a) Turn the ignition switch off.

(b) Check that the steering angle sensor has been installed properly Installation.

OK:

The steering angle sensor installation are normal.

NG -- INSTALL STEERING ANGLE SENSOR CORRECTLY Installation
OK -- Continue to next step.

3. CHECK HARNESS AND CONNECTOR (POWER SOURCE TERMINAL)

(a) Remove the steering wheel and the column cover.





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

(c) Disconnect the steering angle sensor connector.

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

Standard Voltage:





Text in Illustration





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)
OK -- Continue to next step.

4. CHECK HARNESS AND CONNECTOR (GROUND TERMINAL)

(a) Turn the ignition switch off.





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

Standard Resistance:





Text in Illustration





HINT
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 Problem Symptoms Table.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (GROUND CIRCUIT)

OK -- REPLACE STEERING ANGLE SENSOR Removal