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
  
  Fig 1: Measuring Resistance Between Signal Terminal Of A/C Pressure Sensor Harness Connector And Chassis Ground
  Courtesy of HYUNDAI MOTOR AMERICA
3. Is the measured resistance within specification?
  YES
  - Go to " 2 Check open in harness" as follows.
  NO
  - Repair short to ground in harness, and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
Check open 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 A/C pressure sensor signal terminal of ECM harness connector.
  Specification: Below 1Ω
  
  Fig 2: Measuring Resistance Between Signal Terminal Of A/C Pressure Sensor Harness Connector And ECM Harness Connector
  Courtesy of HYUNDAI MOTOR AMERICA
3. 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.