Signal Circuit Inspection

Check short to ground
1. Key "OFF".
2. Disconnect A/C pressure sensor and ECM/PCM connector.
3. Measure the resistance between terminal 2 of A/C pressure sensor harness connector and chassis ground.
  Specification: Infinite
4. Is the measured resistance within specification ?
  YES
  - Go to 2 "Check open in harness" procedure.
  NO
  - Repair Short to ground in A/C pressure sensor signal circuit and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
Check open in harness
1. Key "OFF".
2. Disconnect A/C pressure sensor and ECM/PCM connector.
3. Measure the resistance between terminal 2 of A/C pressure sensor harness connector and terminal 79/C01-1 of ECM/PCM harness connector. [A/T]
  Measure the resistance between terminal 2 of A/C pressure sensor harness connector and terminal 40/C01 of ECM/PCM harness connector. [M/T]
  
  Specification: Approx. below 1Ω
4. Is the measured resistance within specification ?
  YES
  - Go to "COMPONENT INSPECTION " procedure.
  NO
  - Repair Open in signal circuit and go to "VERIFICATION OF VEHICLE REPAIR " procedure.