Description of On-Board Diagnostics

Troubleshooting an electronically controlled automatic transaxle is simplified by using the proven method of diagnosis. One of the most important things to remember is that there is a definite procedure to follow. DO NOT TAKE SHORT CUTS OR ASSUME THAT CRITICAL CHECKS OR ADJUSTMENTS HAVE ALREADY BEEN MADE. Follow the procedures as written to avoid missing critical components or steps.

To properly diagnose a concern, the technician should have the following information available:
- Transaxle service procedures
- Technical Service Bulletins (TSB)