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 all connectors (and connections) for looseness, bending, corrosion, contamination, deterioration, and/or damage.

Has a problem been found?

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

IG Key "OFF".

Disconnect Pressure Sensor connector.

IG "ON".

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

Is the measured value normal?

	▶ Go to next procedure.
	▶ Check for open or short in the pressure sensor circuit. ▶ Repair as necessary and then go to "Verification of Vehicle Repair" procedure.

IG Key "OFF".

Disconnect pressure sensor connector and 4WD ECU connector.

Measure resistance between terminal "power" and "ground" of pressure sensor harness connector.

Is the measured value within specification ?

	▶ Go to next procedure.
	▶ Check for open or short in the pressure sensor circuit. ▶ Repair as necessary and then go to "Verification of Vehicle Repair" procedure.

IG key "OFF".

Disconnect pressure sensor connector and 4WD ECU connector.

Measure resistance between terminal "power" of pressure sensor harness connector and chassis ground.

Is the measured value normal?

	▶ Go to next procedure.
	▶ Check for short in the circuit. ▶ Repair as necessary and then go to "Verification of Vehicle Repair" procedure.