Reading and Clearing Diagnostic Trouble Codes

AUTOMATIC TRANSMISSION DIAGNOSIS

Diagnosing electronically controlled automatic transmissions is simplified by using the following procedures. It is important to remember that there is a definite procedure to follow. Do not take shortcuts or assume that critical checks or adjustments have already been made. Follow the procedures as written to avoid missing critical components or steps.

On-Board Diagnostics With IDS or Equivalent Tester
Perform the Quick Tests first using the integrated diagnostic system (IDS) or equivalent tester.
For information on diagnostic testing features using the IDS or equivalent tester, see IDS or equivalent tester manual and ON - BOARD DIAGNOSTIC TESTS.