Vehicle Stability Control System (for Hydraulic Brake Booster)

BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM (for Hydraulic Brake Booster): C1434: Steering Angle Sensor Output Malfunction
C1434 - Steering Angle Sensor Output Malfunction

DESCRIPTION

Steering angle sensor signals are sent to the skid control ECU (master cylinder solenoid) via the CAN communication system. When there is a malfunction in the CAN communication system, it is detected by the steering angle sensor zero point malfunction diagnostic function.





WIRING DIAGRAM

Refer to DTC C1432 Vehicle Stability Control System (for Hydraulic Brake Booster).

INSPECTION PROCEDURE

NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.

HINT
* When DTC U0073, U0123, U0124 and/or U0126 is output together with DTC C1434, inspect and repair the trouble areas indicated by DTC U0073, U0123, U0124 and/or U0126 first Vehicle Stability Control System (for Hydraulic Brake Booster).
* When any of the speed sensors or the yaw rate and deceleration sensor has trouble, DTCs for the steering angle sensor may be stored even when the steering angle sensor is normal. When DTCs for the speed sensors or yaw rate and deceleration sensor are output together with DTCs for the steering angle sensor, inspect and repair the speed sensor and yaw rate and deceleration sensor first, and then inspect and repair the steering angle sensor.

PROCEDURE

1. CHECK DTC

(a) Clear the DTCs Vehicle Stability Control System (for Hydraulic Brake Booster).

(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 deceleration sensor DTCs are output Vehicle Stability Control System (for Hydraulic Brake Booster).

Result





HINT
* If there is a malfunction in any of the speed sensors or the yaw rate and deceleration sensor, an abnormal value may be output although the steering angle sensor is normal.
* If speed sensor and yaw rate and deceleration sensor DTCs are output simultaneously, repair these two sensors first, and then inspect the steering angle sensor.

B -- GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) How to Proceed With Troubleshooting

C -- REPAIR CIRCUIT INDICATED BY OUTPUT DTC Vehicle Stability Control System (for Hydraulic Brake Booster)
A -- Continue to next step.

2. INSPECT STEERING ANGLE SENSOR (IG, BAT TERMINAL) Vehicle Stability Control System (for Hydraulic Brake Booster)

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

3. INSPECT STEERING ANGLE SENSOR (ESS TERMINAL) Vehicle Stability Control System (for Hydraulic Brake Booster)

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

OK -- REPLACE STEERING ANGLE SENSOR Removal