C1336

BRAKE CONTROL: ELECTRONICALLY CONTROLLED BRAKE SYSTEM: C1210/36,C1336/98: 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 the 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 skid control ECU, perform the following operations:

- Initialization of linear solenoid valve and calibration Initialization
- Yaw rate and acceleration sensor zero point calibration Calibration

HINT
If a CAN communication malfunction DTC and a related sensor malfunction DTC are output at the same time, the CAN communication malfunction must be repaired before troubleshooting the sensor malfunction DTC.

PROCEDURE

1. CHECK YAW RATE AND ACCELERATION SENSOR INSTALLATION

(a) 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 Installation
OK -- Continue to next step.

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

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

NEXT -- Continue to next step.

3. RECONFIRM DTC

(a) Clear the DTCs Reading and Clearing Diagnostic Trouble Codes.

(b) Turn the power switch ON (READY).

(c) Drive the vehicle at a speed of 35 km/h (24 mph) or more, and turn the steering wheel to the right and left.

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

Result

HINT
- *1: The DTCs are recorded because zero point calibration has not been completed.
- *2: End the procedure since the same DTCs are not recorded after completion of zero point calibration.

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

4. REPLACE YAW RATE AND ACCELERATION SENSOR

(a) Replace the yaw rate and acceleration sensor Removal.

NEXT -- Continue to next step.

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

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

NEXT -- Continue to next step.

6. RECONFIRM DTC

(a) Clear the DTCs Reading and Clearing Diagnostic Trouble Codes.

(b) Turn the power switch ON (READY).

(c) Drive the vehicle at a speed of 35 km/h (24 mph) or more, and turn the steering wheel to the right and left.

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

Result