C1210

BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM: C1210/36, C1336/39: Zero Point Calibration of Yaw Rate Sensor Undone

DESCRIPTION

The skid control ECU receives signals from the yaw rate and acceleration sensor via the CAN communication system.

The yaw rate sensor has a built in acceleration sensor and detects the vehicle's condition using 2 circuits (GL1, GL2). If there is trouble in the bus lines between the yaw rate and acceleration sensor and the CAN communication system, the DTCs U0123/62 (yaw rate sensor communication trouble) and U0124/95 (acceleration sensor communication trouble) are output.

The DTCs are also output when the calibration has not been completed.

INSPECTION PROCEDURE

NOTICE:
When replacing the brake actuator assembly, perform zero point calibration Programming and Relearning.

HINT
When U0123/62, U0124/95 or U0126/63 is output along with C1210/36 or C1336/39, inspect and repair trouble areas indicated by U0123/62, U0124/95 or U0126/63 first.

PROCEDURE

1. PERFORM ZERO POINT CALIBRATION OF YAW RATE AND ACCELERATION SENSOR

(a) Perform zero point calibration of the yaw rate and acceleration sensor Programming and Relearning.

NEXT -- Continue to next step.

2. RECONFIRM DTC

(a) Turn the engine switch off.

(b) Clear the DTC Reading and Clearing Diagnostic Trouble Codes.

(c) Turn the engine switch on (IG).

(d) Check if the same DTCs are recorded Reading and Clearing Diagnostic Trouble Codes.

Result:

HINT
- The DTCs are recorded because zero point calibration has not been completed.
- End the procedure as the same DTCs are not recorded after completion of zero point calibration.

B -- END
A -- Continue to next step.

3. CHECK YAW RATE AND ACCELERATION SENSOR INSTALLATION

(a) Turn the engine switch off.

(b) Check that the yaw rate and acceleration sensor has been installed properly Installation.

OK:

The sensor is tightened to the specified torque.

The sensor is not tilted.

NG -- INSTALL YAW RATE AND ACCELERATION SENSOR CORRECTLY

OK -- REPLACE BRAKE ACTUATOR ASSEMBLY