Troubleshooting Guide
TROUBLESHOOTING GUIDEGENERAL NOTES
A problem with the electronically controlled-automatic transmission (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: On-Board Diagnostic System Inspection
Check for diagnostic trouble code(s) memorized in the transaxle control module and the engine control module with the special service tool-new generation star tester (NGS). Verify the engine and its control system are operating properly prior to evaluating transmission operation.
Step 2: Mechanical System Test
Check the engine stall speed, time lag and line pressure, and solenoid reducing pressure.
Step 3: Road Test
Check the shift point and shift shock.