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

Step 1: On-Board Diagnosis System Inspection




Check for diagnostic trouble code(s) memorized in the transmission control module by using the Self-Diagnosis Checker.

NOTE: You can also check the flashing sequence of the HOLD indicator light for diagnostic trouble code(s).

Step 2: Mechanical System Test




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

Step 3: Road Test




Check the shift point, shift schedule, and shift shock. Use the transmission control module when checking vehicle speed, engine speed, throttle opening (throttle position sensor voltage), and gear position.