Zero Point Calibration of Acceleration Sensor Undone

BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: 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 a built-in acceleration sensor and detects the vehicle's condition using 2 circuits (GL1, GL2).

If there are any problems in the bus lines between the yaw rate and acceleration sensor and the CAN communication system, DTCs U0123/62 (Lost Communication with Yaw Rate Sensor Module) and U0124/95 (Lost Communication with Lateral Acceleration Sensor Module) will be output.

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





INSPECTION PROCEDURE

NOTICE:
* When replacing the brake booster with master cylinder (skid control ECU), perform initialization and calibration of the linear solenoid valve Initialization.
* When replacing the yaw rate and acceleration sensor, perform zero point calibration Calibration.

HINT
When U0123/62 and/or U0124/95 is output together with C1210/36 and/or C1336/98, inspect and repair trouble areas indicated by U0123/62 and/or U0124/95 first U0073.

PROCEDURE

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

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

NEXT -- Continue to next step.

2. RECONFIRM DTC

(a) Turn the power switch off.

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

(c) Turn the power switch on (READY).

(d) Drive the vehicle at a speed of 30 km/h (18 mph) or more, turn the steering wheel, and decelerate (depress the brake pedal) the vehicle.

(e) Check if the same DTC is recorded Reading and Clearing Diagnostic Trouble Codes.

Result:





HINT
* The DTCs are recorded because zero point calibration has not been completed.
* End the procedure because 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 power 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 Installation
OK -- Continue to next step.

4. REPLACE YAW RATE AND ACCELERATION SENSOR

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

NOTICE:
Check the yaw rate and acceleration sensor signal after replacement Test Mode Procedure.

NEXT -- Continue to next step.

5. 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 30 km/h (18 mph) or more, turn the steering wheel, and decelerate (depress the brake pedal) the vehicle.

(d) Check if the same DTC is recorded Reading and Clearing Diagnostic Trouble Codes.

Result:





B -- END

A -- REPLACE BRAKE BOOSTER WITH MASTER CYLINDER Removal