4.
Is the measured resistance within specification ?
YES
a.
Go to "Check open in harness" procedure.
NO
a.
Repair short to ground in harness and go to "Verification of Vehicle Repair" procedure.
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 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.
■ Check voltage
IG Key "OFF".
Disconnect the A/C pressure sensor connector.
IG Key "ON".
Measure the voltage between power terminal of A/C pressure sensor harness connector and chassis ground.
Specification : 5V
Is the measured voltage within specification ?
YES
▶ Go to "Signal Circuit Inspection" procedure.
NO
▶ Repair open or short to ground in harness and go to "Verification of Vehicle Repair" procedure.
■ Check short to ground in harness
IG Key "OFF".
Disconnect A/C pressure sensor and PCM connector.
Measure the resistance between signal terminal of A/C pressure sensor harness connector and chassis ground.
Specification : Infinite
Is the measured resistance within specification ?
YES
Go to "Check open in harness" procedure.
NO
Repair short to ground in harness and go to "Verification of Vehicle Repair" procedure.
■ Check open in harness
IG Key "OFF".
Disconnect A/C pressure sensor and PCM connector.
Measure the resistance between signal terminal of A/C pressure sensor harness connector and A/C pressure sensor signal terminal of PCM harness connector.
Specification : Approx. below 1Ω
Is the measured resistance within specification ?
YES
Go to "Component inspection" procedure.
NO
Repair open in harness and go to "Verification of Vehicle Repair" procedure.
