Procedures

Coding Tire Pressure Monitoring Control Module

If tire pressure monitoring control module is replaced, new control module must be coded. To do this, proceed as follows.

- Connect (VAS 5051 A) perform vehicle-specific entry into Guided Fault Finding and select go to button "function/component selection".

Then

- "Chassis (Repair group 01; 40 - 49)"

- "Tire pressure monitoring (Repair group 01; 44)"

- "01 - On Board Diagnostic (OBD) capable systems"

- "65 - Tire pressure monitoring J502"

- "J502 - Tire Pressure Monitoring Control Module, functions"

- "65 - Replacing control module (repair group 44)"

Tire pressure saving must be initiated after every desired change to the specified pressures.

Save Tire Pressures

The correct saving of the specified values in the basic requirement for dependable tire pressure monitoring.

After each change to the tires, the tire pressure monitoring button must be pressed for approximately 5 seconds with the ignition turned on and the vehicle standing until a signal tone is heard and the yellow "system malfunction diagram" in the instrument cluster blinks several times. Blinking several times confirms the calibration procedure and the readapting of the tire pressures.

The procedure for saving the tire pressures must be initiated each time the tire specified pressures are changed. The procedure takes place while driving.

Store when Changing a Tire or Replacing a Tire Pressure Sensor

Adapting the tire pressure sensors is a basic requirement for the tire pressure monitoring system to function properly.

Each time a tire is changed or a tire pressure sensor is replaced, the tire pressure sensor must be pressed for approximately 5 seconds with the ignition turned on and vehicle standing still until a signal tone is heard and the yellow "system malfunction diagram" in the instrument cluster blinks several times.

If the tire pressure monitoring button is not pressed, the system learns the new sensors but still activates the indicator lamp to request active operation.

The vehicle must now stand for 20 minutes and then be driven on a 10-minute adaptation drive at speeds greater than 25 km/h.

If the standing time is not followed, control module is not in learning mode so system recognizes a malfunction and can only automatically learn wheel electronics after standing 20 minutes.