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?

	▶ Repair as necessary and go to "Verification of vehicle Repair" procedure.
	▶ Go to next step as below.

IG "OFF" and disconnect MAPS, TPS, APS, A/C Refrigerant Pressure Sensor connector.

IG "ON"

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

Measure voltage between power terminal of A/C Refrigerant Pressure Sensor harness connector and chassis ground.

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

Measure voltage between power terminal of APS 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