Signal Circuit Inspection

Check short to ground
1. Key "OFF".
2. Disconnect A/C pressure sensor and PCM connector.
3. Measure the resistance between terminal 2 of A/C pressure sensor harness connector and chassis ground.
  1. Specification : Infinite
    
    Fig 1: Measuring Resistance Between Terminal 2 Of A/C Pressure Sensor Harness Connector And Chassis Ground
    Courtesy of KIA MOTORS AMERICA, INC.
4. Is the measured resistance within specification?
  YES
  1. Go to " 2 Check open in harness" procedure.
  NO
  1. 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 PCM connector.
3. Measure the resistance between terminal 2 of A/C pressure sensor harness connector and terminal 79/C01-1 of PCM harness connector. [A/T]
  Measure the resistance between terminal 2 of A/C pressure sensor harness connector and terminal 40/C01 of ECM harness connector. [M/T]
  1. Specification : Approx. below 1Ω
    
    Fig 2: Measuring Resistance Between Terminal 2 Of A/C Pressure Sensor Harness Connector And Terminal 79/C01-1 Of PCM Harness Connector
    Courtesy of KIA MOTORS AMERICA, INC.
4. Is the measured resistance within specifications?
  YES
  1. Go to "COMPONENT INSPECTION " procedure.
  NO
  1. Repair Open in signal circuit and go to "VERIFICATION OF VEHICLE REPAIR " procedure.