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 next step as below.

IG "OFF" & Disconnect OCV connector.

IG "ON" & ENG "OFF".

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

Is the measured voltage within specification?

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

IG "OFF" & Disconnect OCV connector.

IG "ON" & ENG "OFF".

Measure voltage between control terminal of OCV heater harness connector and chassis ground.

Is the measured voltage within specification?

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