C1336

C11A0, C1336

Description
The brake ECU receives signals from the yaw rate/side/decel G sensor through 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/side/decel G sensor and the CAN communication system, the DTCs U0123 (yaw rate sensor communication trouble) and U0124 (acceleration sensor communication trouble) are output.

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

DTC Logic:

Diagnosis Procedure

CAUTION:
When replacing the brake ECU, perform initialization of the linear solenoid valve and calibration.

NOTE:
When U0123, U0124 or U0126 is output along with C11A0 or C1336, inspect and repair trouble areas indicated by U0123, U0124 or U0126 first.

1.PERFORM ZERO POINT CALIBRATION OF YAW RATE/SIDE/DECEL G SENSOR
Perform zero point calibration of the yaw rate/side/decel G sensor.
>> GO TO 2.

2.RECONFIRM DTC
1. Turn the ignition switch OFF.
2. Clear the DTC.
3. Turn the ignition switch ON.
4. Check if the same DTC is recorded.

Result:

NOTE:
^ 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.

A >> GO TO 3.
B >> INSPECTION END

3.CHECK YAW RATE/SIDE/DECEL G SENSOR INSTALLATION
1. Turn the ignition switch OFF.
2. Check that the yaw rate/side/decel G sensor has been installed properly.
Is the inspection result normal?
YES >> Replace brake ECU.
NO >> Install yaw rate/side/decel G sensor correctly.

Special Repair Requirement

1.ZERO ADJUSTMENT FOR EACH SENSOR AND OFFSET LEANING FOR LINEAR SOLENOID VALVE
After erasing brake ECU memories, perform zero adjustment of following sensors and initialization of linear solenoid valve.
^ Steering angle sensor: BRC-9, "PERFORM ZERO POINT OF STEERING ANGLE SENSOR: Description". Testing and Inspection
^ Yaw rate/side/decel G sensor: BRC-8, "PERFORM ZERO POINT OF YAW RATE/SIDE/DECEL G SENSOR: Description". Testing and Inspection
^ Brake stroke sensor: BRC-9, "PERFORM ADJUSTMENT OF STROKE SENSOR: Description". Perform Adjustment of Stroke Sensor
^ Linear solenoid valve: BRC-7, "PERFORM INITIALIZATION OF LINEAR SOLENOID VALVE AND CALIBRATION: Description". Perform Initialization of Linear Solenoid Valve and Calibration
>> END