Troubleshooting Electronically Controlled Transmissions

Trouble occurring in the ECT can stem from one of three sources: the engine, the ECT electronic control unit or the transmission itself. Before troubleshooting, determine in which these three sources the problem lies, and begin troubleshooting with the simplest operation, gradually working up in order of difficulty.

Before troubleshooting an ECT, first determine whether the problem is electrical or mechanical. To do this, just refer to the basic troubleshooting flow-chart.

Basic Troubleshooting:

If the cause is already known, using the basic troubleshooting chart along with the general troubleshooting chart should speed the procedure.

General Troubleshooting Part 1:

General Troubleshooting Part 2: