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.

Have any problems been found?

	▶ Repair as necessary and go to "Verification of vehicle Repair" procedure.
	▶ Go to "Power Circuit Inspection" procedure.

IG "OFF" and disconnect BPS connector.

IG "ON".

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

Is the measured voltage within specification?

	▶ Go to "Siganl Cirtuit Inaspection" procedure.
	▶ Repair or replace as necessary and then, go to "Verification of Vehicle Repair" procedue.

IG "OFF" and disconnect BPS connector.

IG "ON".

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

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

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

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

Is the measured voltage within specification?

	▶ Go to "Ground Circuit Inspection" procedure.
	▶ Repair or replace as necessary and then, go to "Verification of Vehicle Repair" procedue.

IG "OFF" and disconnect BPS connector.

IG "ON".

Measure the voltage between power terminal of BPS harness connector and chassis ground.(A)

Measure the voltage between power and ground terminal of BPS harness connector.(B)

	▶ Go to "Component Inspection" procedure.
	▶ Repair or replace as necessary and then, go to "Verification of Vehicle Repair" procedue.