Test Description
WARNING: This page is about a different car, the 2003 Buick Regal and 2003 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.
The numbers below refer to the step numbers on the diagnostic table.
2. The lack of communication may be caused by a partial or a total malfunction of the circuit containing the class 2 serial data. The specified procedure will determine the particular condition.
3. The presence of DTCs which begin with a U indicate some other module is not communicating. The specified procedure will collect all the available information before tests are performed.
4. The presence of ABS DTCs indicates the TPM system could be disabled due to a malfunction with the antilock brake system.