Operation CHARM: Car repair manuals for everyone.

Inspection Procedure 1

OVERVIEW OF SYMPTOM
If communication with the scan tool is not possible, the cause is probably a malfunction in the on-board diagnostic system or the TCM is not functioning.




DIAGNOSTIC FLOW CHART

PROBABLE CAUSE
- Malfunction of on-board diagnostic system
- Malfunction of TCM power circuit
- Malfunction of TCM ground circuit
- Malfunction of TCM