Flow of Diagnosis
DIAGNOSISTrouble occurring in the Electronic Controlled Transmission (ECT) can stem from one of three sources: the engine, the ECT electronic control unit or the transmission itself. Before troubleshooting, determine in which of these three sources the problem lies, and begin troubleshooting with the simplest operation, gradually working up in order of difficulty.
BASIC TROUBLESHOOTING
AW3O-8OLE transmission, called Electronic Controlled Transmission (ECT), differs from oil pressure control type transmissions in that it is controlled by a microcomputer. Accordingly, its troubleshooting procedure differs also.
Before troubleshooting an ECT, first determine whether the problem is electrical or mechanical. To do this, just refer to the basic troubleshooting flowchart provided below.
If the cause is already known, using the Basic Troubleshooting Chart below along with the General Troubleshooting Charts under Diagnosis by Symptom should speed the procedure.
