Flow of Diagnosis

WATCH FOR OIL LEAKS
There should be no such conventional problems as oil leaks in the TCS operating circuits. Nor should there be lack of brake fluid or other problems with the brake system.

INTERMITTENT PROBLEMS
It is much more difficult to diagnose a problem that occurs intermittently, rather than continuously. Most intermittent problems are caused by poor electric connections or faulty wiring. In this case, careful checking of suspicious circuits may help prevent the replacement of good parts.

VISUAL INSPECTION
A visual check only may not find the cause of the problems, so a road test should be carried out. Before undertaking actual checks, take just a few minutes to talk with a customer who approaches with a TCS complaint.

SOURCE INFORMATION
The owner is a very good source of information on such problems, especially intermittent ones. Through the talks with the customer, find out what symptoms are present and under what conditions they occur.

LOOK FOR CONVENTIONAL PROBLEMS
Start your diagnosis by looking for "conventional" problems first. This is one of the best ways to troubleshoot brake problems on a TCS controlled vehicle.

NOTE: It is strongly recommended that the TCS/ABS control unit be checked for electrical problems first. Then check the TAC module.