Inspection Procedure
NOTE:
When replacing the skid control ECU, perform initialization of linear solenoid valve and calibration (see INITIALIZATION
).
HINT:
- When U0126 is output together with C1231/31, inspect and repair the trouble areas indicated by U0126/63 first.
- When the speed sensor or the yaw rate (deceleration) 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 together with other DTCs for the steering angle sensor, inspect and repair the speed sensor and yaw rate (deceleration) sensor first, and then inspect and repair the steering angle sensor.
- CHECK HARNESS AND CONNECTOR (MOMENTARY INTERRUPTION)
- Using the intelligent tester, check for any momentary interruption in the wire harness and connectors between the skid control ECU and steering angle sensor (see CHECK FOR INTERMITTENT PROBLEMS
).
Skid control ECU
MEASUREMENT ITEMItem Measurement Item / Range (Display) Normal Condition Diagnostic Note STEERING SEN Steering sensor open detection / OPN-DET or NORMAL NORMAL: Normal condition - OK : There are no momentary interruptions.
NG : REPAIR OR REPLACE HARNESS AND CONNECTOR
OK
- Using the intelligent tester, check for any momentary interruption in the wire harness and connectors between the skid control ECU and steering angle sensor (see CHECK FOR INTERMITTENT PROBLEMS
).
- READ VALUE OF INTELLIGENT TESTER (STEERING ANGLE SENSOR)
- Check the DATA LIST for proper functioning of the steering angle sensor.
Skid control ECU
MEASUREMENT ITEMItem Measurement Item / Range (Display) Normal Condition Diagnostic Note STEERING ANG Steering sensor / Min.: -1152 deg, Max.: 1150.875 deg Left turn: Increase
Right turn: Decrease- OK : Steering angle value should change.
OK : REPLACE SKID CONTROL ECU
NG
- Check the DATA LIST for proper functioning of the steering angle sensor.
- CHECK WIRE HARNESS (STEERING ANGLE SENSOR - BATTERY AND BODY GROUND)
- Remove the steering wheel and the column lower cover.
- Disconnect the S13 sensor connector.
- Turn the power switch ON (READY).
- Measure the voltage of the wire harness side connector.
Standard voltage
TESTER CONNECTION SPECIFIED CONDITIONTester Connection Specified Condition S13-1 (IG) - S13-2 (ESS) 10 to 14 V S13-3 (BAT) - S13-2 (ESS) 10 to 14 V
NG : REPAIR OR REPLACE HARNESS AND CONNECTOR
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
OK : REPLACE STEERING ANGLE SENSOR