Zero Point Calibration of Acceleration Sensor Undone - Vehicle Stability Control System (for Hydraulic Brake Booster)

BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM (for Hydraulic Brake Booster): C1210/36,C1336/39: Zero Point Calibration of Yaw Rate Sensor Undone
C1336/39 - Zero Point Calibration of Acceleration Sensor Undone

DESCRIPTION

Skid control ECU receives signals from the yaw rate sensor and deceleration sensor via the CAN communication system.

The deceleration sensor is built into the yaw rate sensor.

If there is trouble in the bus lines between the yaw rate sensor and deceleration sensor and the CAN communication system, the DTCs U0123/62 (yaw rate sensor communication trouble) and U0124/95 (deceleration sensor communication trouble) are output.

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





WIRING DIAGRAM





INSPECTION PROCEDURE

HINT
When U0073/94, U0100/65, U0123/62, U0124/95 or U0126/63 are output accompanied by C1210/36 or C1336/39, inspect and repair the trouble areas indicated by U0073/94, U0100/65,U0123/62, U0124/95 or U0126/63 first.

PROCEDURE

1. PERFORM YAW RATE AND DECELERATION SENSOR ZERO POINT CALIBRATION

(a) Perform the zero point calibration of the yaw rate sensor and deceleration sensor Vehicle Stability Control System (for Hydraulic Brake Booster).

NEXT -- Continue to next step.

2. RECONFIRM DTC

(a) Clear the DTCs Vehicle Stability Control System (for Hydraulic Brake Booster).

(b) Check if the same DTCs are recorded.





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

3. CHECK YAW RATE AND DECELERATION SENSOR INSTALLATION

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

OK:

The sensor is tightened to the specified torque.

The sensor is not tilted.

NG -- INSTALL YAW RATE SENSOR CORRECTLY
OK -- Continue to next step.

4. CHECK HARNESS AND CONNECTOR (ECU - PARK/NEUTRAL POSITION SWITCH OR PARKING BRAKE SWITCH)

(a) A/T

(1) Disconnect the skid control ECU connector.





(2) Disconnect the Park/Neutral position switch connector.

(3) Measure the resistance.

Standard Resistance:





(4) Reconnect the Park/Neutral position switch connector.

(5) Reconnect the skid control ECU connector.

(b) M/T:

(1) Disconnect the skid control ECU connector.





(2) Disconnect the parking brake switch connector.

(3) Measure the resistance.

Standard Resistance:





(4) Reconnect the parking brake switch connector.

(5) Reconnect the skid control ECU connector.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

5. INSPECT PARK/NEUTRAL POSITION SWITCH OR PARKING BRAKE SWITCH

(a) Inspect the Park/Neutral Position (PNP) switch (for A/T models).

(1) Disconnect the P1 PNP switch connector.





(2) Check the resistance when the transmission gear selector lever is moved to each position.

Standard Resistance:





(3) Reconnect the PNP switch connector.

(b) Inspect the parking brake switch (for M/T models).

(1) Disconnect the parking brake switch connector.





(2) Measure the resistance.

Standard Resistance:





(3) Reconnect the parking brake switch connector.

NG -- REPLACE PARK/NEUTRAL POSITION SWITCH OR PARKING BRAKE SWITCH
OK -- Continue to next step.

6. REPLACE YAW RATE AND DECELERATION SENSOR

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

NEXT -- Continue to next step.

7. PERFORM YAW RATE AND DECELERATION SENSOR ZERO POINT CALIBRATION

(a) Perform the zero point calibration of the yaw rate sensor and deceleration sensor Vehicle Stability Control System (for Hydraulic Brake Booster).

NEXT -- Continue to next step.

8. RECONFIRM DTC

(a) Clear the DTCs Vehicle Stability Control System (for Hydraulic Brake Booster).

(b) Check if the same DTCs are recorded.





B -- END

A -- REPLACE MASTER CYLINDER SOLENOID