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 APS connector and ECM/PCM connector.

Measure resistance between APS1 signal and APS1 power terminals of APS harness connector.

Measure resistance between APS1 signal and APS2 power terminals of APS harness connector.

Is the measured resistance within specification ?

	▶ Go to "Ground Circuit Inspection" procedure.
	▶ Repair short to battery in harness and go to "Verification of Vehicle Repair" procedure.

IG "OFF" and disconnect APS connector.

Measure voltage between APS1 power terminal of APS harness connector and chassis ground.(Measurement "A")

Measure voltage between APS1 power and APS1 ground terminals of APS harness connector.(Measurement "B")

Is the measured voltage within specification ?

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