Initial Inspection and Diagnostic Overview

TROUBLESHOOTING GUIDE

GENERAL NOTES

A problem with the EC-AT may be caused by the engine, the EC-AT powertrain, the hydraulic control system, or the electronic control system.

When troubleshooting, begin with those points which can be inspected quickly and easily. The recommended troubleshooting sequence is described below.

Step 1: Self-diagnosis Function






Check for diagnostic trouble code(s) memorized in the powertrain control module (Transaxle) with the EC-AT Tester.

Step 2: Electric Signal Inspection






Check the signals to/from the powertrain control module (Transaxle) with the EC-AT Tester.

Note

Signals can also be inspected by checking the powertrain control module (transaxle) terminal voltages with a voltmeter or engine signal monitor.

Step 3: Mechanical System Test






Check the engine stall speed, time lag, line pressure, and throttle pressure.

Step 4: Road Test






Check the shift point, shift schedule, and shift shock. Use the EC-AT tester when checking vehicle speed, throttle opening (throttle position sensor voltage), and gear position.