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 "CAN communication circuit inspection" procedure.

IG "OFF" and disconnect A/C Control module connector and ECM connector.

Check resistance between CAN-HIGH terminal of Instrument cluster Connector and CAN-HIGH terminal of harness connector.(Measurement "A")

Check resistance between CAN-LOW terminal of Instrument cluster Connector and CAN-LOW terminal of harness connector.(Measurement "B")

Is the measured resistance within specification ?

	▶ Substitute with a known-good Instrument cluster and check for proper operation. If the problem is corrected, replace A/C Control module and then go to "Verification of Vehicle Repair" procedure.
	▶ Repair open in CAN BUS line and go to "Verification of Vehicle Repair".