Troubleshooting Hints

NOTE: 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 Diagnostic System Inspection
Check for diagnostic trouble code(s) memorized in the powertrain control module with the New Generation Star (NGS) tester.




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.