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 "Power Circuit Inspection" procedure.

Ignition "OFF".

Disconnect TPS connector.

Ignition "ON" & Engine "OFF".

Measure voltage between terminal 3 of the sensor harness connector and chassis ground.

Specification : Approx. 5V

Is voltage within the specification?

YES

▶ Go to "Signal Circuit inspection" procedure.

NO

▶ Possibility of open or short to ground in 5V reference circuit. Repair as necessary and go to "Verification of Vehicle Repair" procedure.

Ignition "ON"

Measure voltage between terminal 1 of the sensor harness connector and chassis ground.

Specification : Approx. 5V

Is voltage within the specification?

YES

▶ Go to "Component Inspection" procedure.

NO

▶ Check the short to ground in signal circuit.

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