Disconnect all related modules and PCM/ECM connectors and inspect for looseness, poor connection, bending, corrosion, contamination, deterioration or damage. Reconnect the connectors.

Connect the GDS and go to “Current Data”.

Monitor modules and PCM/ECM sensor values in Current Data, check and wiggle the harness(es), connector(s), and terminal(s).

Any change in the values indicates a poor connection. Was a connector problem found?

	▶ Repair the connector. Go to "Verification of Vehicle Repair" procedure.
	▶ Go to "Signal Circuit Inspection" procedure.

IG "OFF". Disconnect the connectors related to the CAN communication

Measure resistance between High signal terminal of PCM/ECM and TCM.

Measure resistance between Low signal terminal of PCM/ECM and TCM.

Is the measured resistance within specification ?

	▶ Go to next step as below.
	▶ Repair CAN communication line for Open. And then go to "Verification of Vehicle Repair" procedure.