Mechanical

NOTE: Do not take short cuts or assume that critical adjustments have already been made.

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. Follow the procedures as written to avoid missing critical components or steps.

To properly diagnose a concern, the technician should have the following publications available:
- Technical Service Bulletins (TSBs)

These publications provide the information required when diagnosing transaxle concerns.

Preliminary Inspection
- Know and understand the customer concern. Verify the concern by operating the vehicle.
- Check fluid level and condition.
- Check non-factory add-on items.
- Check shift linkages for proper adjustment.
- Check TSBs for the concern.

Diagnostics
- Perform on-board diagnostic procedures; Key On Engine Off (KOEO), and Key On Engine Running (KOER).
- Record all Diagnostic Trouble Codes (DTCs).
- Repair all non-transaxle codes first.
- Repair all transaxle codes second.
- Erase all continuous codes and attempt to repeat them.
- Repair all continuous codes.
- If only pass codes, proceed to diagnosis by symptom charts for further information and diagnosis.Symptom Related Diagnostic Procedures

By following the diagnostic sequence, the repair technician will be able to diagnose and repair the concern the first time.

Preparations
- Know and understand the customers concern
- Verify the concern by operating vehicle
- Check fluid level and condition
- Check for non-factory installed items and verify proper installation
- Check shift linkage adjustment in over drive
- Check TSB's for vehicle concern
- Perform "Quick Test" both KOEO & KOER
- Record all codes

Fault Codes Procedures
- Repair all hard DTC codes.

If the continuous test memory codes are present:
- Clear the codes and perform a drive-cycle test.

If the continuous test memory codes reappear:
- Repair continuous test memory codes.

If the concern is repaired, perform the Final Procedures.

If no further codes appear and the concern is not repaired yet, perform the Pass Codes Procedures.

Pass Codes Procedures
- Go to the "Diagnosis by symptom".Symptom Related Diagnostic Procedures

If there are no electrical routines to perform:
- Use the "Hydraulic/Mechanical routine" to diagnose and repair concern.
- Otherwise install the Transmission Tester and perform the static and drive tests with the Transmission Tester.

If the concern couldn't be corrected with the tester
- Use the "Hydraulic/Mechanical routine"

If the concern is repaired, Perform the Final Procedures.

Final Procedures
- Perform the final "Quick Test" to verify no Diagnostic Trouble Code (DTC) codes are present.
- Clear memory code.
- Return vehicle to customer.