Master Cylinder Brake Fluid Pressure Sensor Calibration

CAUTION:

Before performing the calibration, check that the wheel cylinder brake fluid pressure sensor-related diagnostic trouble code is not set.
Always perform the calibration with the brake pedal released (stoplight switch is turned off).
After the operation below is completed, perform the calibration to make ASC-ECU to learn the neutral point of the wheel cylinder brake fluid pressure sensor.
1. Troubleshooting for diagnostic trouble code No. C123A
2. ASC-ECU replacement

Park the vehicle on a level surface.
Turn the ignition key to the ON position.
Turn the ignition key to the LOCK (OFF) position.
CAUTION: Before connecting or disconnecting scan tool MB991958, always turn the ignition switch to the LOCK (OFF) position.
Check that the ignition key is in the LOCK (OFF) position, and then set scan tool MB991958.
Turn the ignition switch to the ON position.
On the Menu, select "System selection."
On the "System selection," select "ABS/ASC/ASTC/WSS" in the system list, and then click the "OK" button.
Select "Special function" in the "ABS/ASC/ASTC/WSS" field.
In the "Special function," select "Learn sensor neutral position."
Among the selected items, select "Learn M/C pressure sensor neutral position," and then press the "OK" button.
When a message "Learn M/C pressure sensor neutral position: Are you sure to execute the selected item? Caution: Check the execution conditions" is displayed, press the "OK" button.
When a message "Command execution: Command has been executed" is displayed, press the "OK" button.
The neutral point is learned.
Turn the ignition key to the LOCK (OFF) position, and then remove the scan tool from the vehicle.