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 transaxle control module with the Super Star II tester.

Note: You can also check the flashing sequence of the O/D OFF indicator light for diagnostic trouble codes.




Step 2: Electrical Signal Inspection
Check the signals to/from the powertrain control module with the voltmeter and the breakout box.




Step 3: Mechanical System Test
Check the engine stall speed,line pressure.




Step 3: Road Test
Check the shift point, shift schedule, and shift shock.