General Diagnosis Information

GENERAL DIAGNOSIS INFORMATION
Shift points are controlled by the Transmission Control Module (TCM). Before attempting repair, determine if a malfunction is electrical or mechanical.
The TCM used with the AW-4 transmission has a self-diagnostic program compatible with the DRBIII scan tool. The tester will identify faults in the electrical control system.
Diagnosis should begin with the Preliminary Inspection And Adjustment procedure. It is will help determine if a problem is mechanical or electrical. The first procedure step is Initial Inspection and Adjustment.