Many malfunctions in the electrical system are caused by poor harness(es) 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?

YES

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

NO

▶ Go to "Signal Circuit Inspection" procedure.

Ignition "OFF".

Disconnect P/S switch connector.

Start the engine, and measure voltage between P/S switch harness connector and chassis ground referring to specification.

Specification

Is voltage within the specification?

YES

▶ Go to "Component Inspection" procedure.

NO

▶ Repair open or short in harness and go to "Verification of Vehicle Repair" procedure.