Self-Diagnostic System: Introduction

NOTE: Before testing transaxle, ensure fluid level is correct and throttle cable is properly adjusted. Ensure engine starts with gearshift lever in "P" and "N" position to ensure proper adjustment of TR switch. TCM must first be tested by checking for stored DTCs. See RETRIEVING DIAGNOSTIC TROUBLE CODES .

TCM monitors transaxle operation and contains a self-diagnostic system which stores a DTC if an electronic control system failure or problem exists. If a problem exists in any of the solenoids or speed sensors and DTC is set, TCM delivers a signal to blink the O/D OFF indicator light on instrument panel to warn driver. DTC may be set if a failure exists, and DTC can be retrieved for transaxle diagnosis.