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Terminal and Connector Inspection

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.

Power Circuit Inspection

IG "OFF".

Disconnect A/C pressure sensor connector.

IG "ON" & ENG "OFF".

Measure the voltage between power terminal of A/C pressure sensor harness connector and chassis ground.

Specification : Approx. 5V

Is the measured voltage within specification ?

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

Signal Circuit Inspection

Check short to ground in harness

(1)

IG "OFF" and disconnect A/C pressure sensor and ECM connector.

(2)

Measure the resistance between signal terminal of A/C pressure sensor harness connector and chassis ground.

Specification : Infinite

(3)

Is the measured resistance within specification?

	▶ Go to "Check open in harness" as follows.
	▶ Repair or replace as necessary and then, go to "Verification of Vehicle Repair" procedure.

Check open in harness

(1)