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 "Component Inspection" procedure.

IG "OFF" and disconnect Cruise switch connector.

IG "ON"

Measure voltage between power terminal of Cruise switch harness connector and chassis ground.

Is the measured voltage within specification ?

	▶ Go to "Signal Circuit Inspection" procedure.
	▶ Repair open or short to ground in harness and go to "Verification of Vehicle Repair" procedure.

IG "OFF" and disconnect Cruise switch connector.

IG "ON"

Measure voltage between signal terminal of Cruise switch harness connector and chassis ground.

Is the measured voltage within specification ?

	▶ Go to "Component Inspection" procedure.
	▶ Go to "Check short in harness" as follows.

IG "OFF" and disconnect Cruise switch connector and ECM connector.

Measure resistance between signal and power terminals of Cruise switch harness connector.

Measure resistance between signal and ground terminals of Cruise switch harness connector.

Is the measured resistance within specification ?

	▶ Go to "Check open in harness' as follows.
	▶ Repair short in control harness and go to "Verification of Vehicle Repair" procedure.

IG "OFF" and disconnect Cruise switch connector and ECM connector.

Measure resistance between signal terminal of Cruise switch harness connector and cruise signal terminal of ECM harness connector.

Is the measured resistance within specification ?

	▶ Go to "Component Inspection" procedure.
	▶ Repair open in harness, and go to "Verification of Vehicle Repair" procedure.