Flow of Diagnosis

Most problems in the electronic automatic transaxle are related to:
- the electronic control system,
- the oil pressure control system, or
- the automatic transaxle itself.





For efficient troubleshooting of these systems, proceed as described in the chart above.

The numbered steps below correspond to the numbered steps in the flow chart.

1. Get a clear picture of the trouble symptoms from the customer's complaints, including the conditions under which they occur, the frequency of occurrence, etc.
2. Using the scan tool, read and record the diagnostic trouble codes (including the fail safe code).
3. To allow road tests to be performed, clear the diagnostic trouble code.
4. Adjust the basic inspection items (ATF, TPS, Park/Neutral position switch, manual control cable, etc.).
5. Perform road tests. Since the tests cover checks on the basic inspection items and all diagnostic trouble code and reproducing conditions, make sure that the road tests are performed.
6. Check to see whether there is a diagnostic trouble code (recorded in step 2) before the road tests.
7. Find a probable cause of trouble from the Diagnostic Charts.
8. Find a probable cause of trouble from the Diagnosis by Symptom.
9. Perform transient simulation tests.
10. After repairs have been made, perform road tests to verify that the trouble has been corrected.