Many malfunctions in the electrical system are caused by poor harness and terminal conditions. 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 "W/Harness Inspection" procedure.

IG KEY OFF.

Disconnect Mode switch and TCCM connector.

IG KEY ON.

Measure voltage between signal terminal of Mode switch and chassis ground.

Is the measured value within specification ?

	▶ Go to next procedure.
	▶ Repair shorted to battery in signal harness and then, go to 'Verification of Vehicle Repair" procedure.

IG KEY OFF.

Disconnect MODE switch and TCCM connector.

Measure resistance between one and the other signal terminal of Mode Switch harness connector.

Is the measured value within specification ?

	▶ Go to next procedure.
	▶ Repair shorted to battery in signal harness and then, go to 'Verification of Vehicle Repair" procedure.

IG KEY OFF.

Disconnect Mode switch and TCCM connector.

Measure resistance between ground terminal of Mode switch harness connector and chassis ground.

Is the meausured value within specification ?

	▶ Check "Component Inspection" procedure.
	▶ Check open in ground circuit and then, go to 'Verification of Vehicle Repair" procedure.