Toyota Sienna Service Manual: Steering Angle Sensor Circuit Malfunction

DTC C1231/31 Steering Angle Sensor Circuit Malfunction

DESCRIPTION

The steering angle sensor signal is sent to the skid control ECU through the CAN communication system.

When there is a malfunction in the communication, it will be detected by the diagnosis function.

WIRING DIAGRAM

INSPECTION PROCEDURE

HINT:

• When U0073/94, U0100/65, U0123/62, U0124/95 or U0126/63 are output accompanied with C1231/ 31, inspect and repair the trouble areas indicated by U0073/94, U0100/65, U0123/62, U0124/95 or U0126/63 first.
• When the speed sensor or the yaw rate 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 sensor or yaw rate sensor are output accompanied with other DTCs for the steering angle sensor, inspect and repair the speed sensor and yaw rate sensor first, and the n inspect and repair the steering angle sensor.

1 INSPECT STEERING ANGLE SENSOR

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

(b) Disconnect the steering angle sensor connector.

(c) Turn the ignition switch to the ON position.

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

Standard voltage

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

Standard voltage 

REPLACE STEERING ANGLE SENSOR