Many malfunctions in the electrical system are caused by poor harness and terminals. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.

Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.

Has a problem been found ?

	▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.
	▶ Go to "Signal Circuit Inspection" procedure.

IG "OFF" and disconnect ECM and TCM connector.

Check resistance between CAN-HIGH terminal of ECM harness Connector and CAN-HIGH terminal of TCM harness connector.

Check resistance between CAN-LOW terminal of ECM harness Connector and CAN-LOW terminal of TCM harness connector.

Is the measured resistance within specification ?

	▶ Go to "Component Inspection".
	▶ Repair open in CAN BUS line and go to "Verification of Vehicle Repair".