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 "Power Circuit Inspection" procedure.

IG "OFF" and disconnect APS connector.

IG "ON".

Measure voltage between APS1 power terminal of APS harness connector and chassis ground.

Is the measured voltage within specification?

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

IG "OFF".

Disconnect APS connector and ECM connector.

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

Measure resistance between APS1 signal and APS1(2) ground terminals of APS harness connector.(Measurement "B")

Is the measured resistance within specification?

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

IG "OFF" and disconnect APS connector and ECM connector.

Measure resistance between APS1 signal terminal of APS harness connector and APS1 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.