Brake Fluid Pressure Sensor/Switch: Service and Repair

ALL SENSOR CALIBRATION (G AND YAW RATE SENSOR, STEERING WHEEL SENSOR, BRAKE FLUID PRESSURE SENSOR)

CAUTION:
Before carrying out the calibration, check that the diagnostic trouble code related to the steering wheel sensor, G and yaw rate sensor, or brake fluid pressure sensor is not set.

CAUTION:
When the next operation has been completed, carry out the calibration to make ASC-ECU learn the neutral point of the steering wheel sensor, G and yaw rate sensor, and brake fluid pressure sensor.

^ ASC-ECU replacement

CAUTION:
Carry out the calibration under the following conditions.

^ The vehicle has one occupant (driver) only.
^ Turn the steering wheel to set the wheels in the straight-ahead positions.
^ The brake pedal is not depressed. (The stop light switch is OFF.)
1. Park the vehicle on a level surface.

CAUTION:
Before connecting or disconnecting scan tool, always turn the ignition switch to the LOCK (OFF) position.

2. Before setting scan tool, turn the ignition key to the LOCK (OFF) position.
3. Turn the ignition switch to the ON position.
4. Select "ABS/ASC/ASTC."
5. Select "Special function."
6. Select "Sensor calibration."
7. Select "all sensor calibration."
8. Before removing scan tool from the vehicle, turn the ignition key to the LOCK (OFF) position.

BRAKE FLUID PRESSURE SENSOR CALIBRATION

CAUTION:
Prior to calibration, check that no brake fluid pressure sensor-related diagnosis codes are set.

CAUTION:
After the following procedure is complete, carry out calibration to let the ASC-ECU learn the neutral position of the brake fluid pressure sensor.
^ During diagnosis according to diagnostic trouble code No. C123A
^ ASC-ECU replacement

CAUTION:
During the calibration, the brake pedal should be released (the stoplight switch should be off).

1. Park the vehicle on a level surface.

CAUTION:
Before connecting or disconnecting the scan tool, turn the ignition switch to the "LOCK" (OFF) position.

2. Set the scan tool with the ignition at "LOCK" (OFF).
3. Turn the ignition switch to the ON position.
4. Select the relevant system from the menu.
5. Select "ABS/ASC/ASTC" from the system list under "System select", and press "OK" button.
6. Select "Special function" under "ABS/ASC/ASTC".
7. Select "Sensor calibration" under "Special function".
8. Select "M/C pressure sensor calibration" from the selected item, and press "OK" button.
9. The screen displays "M/C pressure sensor calibration: The selected command will be executed. Are you sure? Caution: Please check execution conditions." Then press "OK" button.

10. "Executed: The command was executed." will be shown. Then press "OK" button.
11. Learning neutral point complete
12. Turn the ignition switch to "LOCK" (OFF) position and then disconnect the scan tool.