Up to 08/2009
BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM: C1439,C1445: Steering Angle
Sensor Initialization Incomplete
DESCRIPTION
The skid control ECU acquires the steering angle sensor zero point every time the engine switch is turned on (IG) and the vehicle is driven at 35
km/h (22 mph) or more for approximately 5 seconds. The ECU also stores previous zero points.
DTCs C1439 and C1445 will be cleared when the engine switch is turned off.
WIRING DIAGRAM
INSPECTION PROCEDURE
NOTICE:
- When replacing the brake actuator assembly, perform zero point calibration and store system information See: Brakes and
Traction Control/Antilock Brakes / Traction Control Systems/Testing and Inspection/Programming and Relearning.
- Before proceeding with the inspection, explain to the customer that the output DTC is related to temporary loss of the steering
angle zero point calibration, such as when the power source voltage drops when the battery is removed, and confirm that this
condition occurred.
HINT
- When DTC U0073, U0123, U0124 and/or U0126 is output together with DTC C1439 and/or C1445, inspect and repair the
trouble areas indicated by DTC U0073, U0123, U0124 and/or U0126 first See: U Code Charts/U0073.
- When the speed sensor 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 sensor or yaw rate and acceleration sensor are
output together with other 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.
PROCEDURE
1. CHECK DTC
(a) Clear the DTCs See: Brakes and Traction Control/Antilock Brakes / Traction Control Systems/Testing and Inspection/Reading and
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