Operation CHARM: Car repair manuals for everyone.

Engine Control Module: Testing and Inspection




Check the internal control module ROM/RAM error.







Harness Inspection Procedure (Step 1):






Troubleshooting Procedures:






TROUBLESHOOTING HINTS
- If the ground wire of the ECM is not connected securely to ground, the ECM will not operate correctly.
- If we replace ECM ROM without further diagnosis, the problem may reoccur.