Zero Point Calibration of Yaw Rate Sensor Undone - Electronically Controlled Brake System

BRAKE CONTROL: ELECTRONICALLY CONTROLLED BRAKE SYSTEM: C1210/36, C1336/98: Zero Point Calibration of Yaw Rate Sensor Undone
C1336/98 - Zero Point Calibration of Acceleration 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 initialization of the linear solenoid valve and calibration Initialization.

HINT
When U0123/62, U0124/95 or U0126/63 is output along with C1210/36 or C1336/98, inspect and repair the trouble areas indicated by U0123/62, U0124/95 or U0126/63 first.

PROCEDURE

1. CHECK YAW RATE AND ACCELERATION SENSOR INSTALLATION

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

OK:

The sensor is tightened to the specified torque.

The sensor is not be tilted.

NG -- INSTALL YAW RATE AND ACCELERATION SENSOR CORRECTLY
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 Electronically Controlled Brake System.

(b) Start the engine.

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

(d) Check if the same DTCs are recorded Electronically Controlled Brake System.

Result:





HINT
* The DTCs are recorded because zero point calibration has not been completed.
* 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.

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 Electronically Controlled Brake System.

(b) Start the engine.

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

(d) Check if the same DTCs are recorded Electronically Controlled Brake System.

Result:





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

B -- END

A -- REPLACE SKID CONTROL ECU