Component Inspection

Check A/C Relay
1. Ignition "OFF"
2. Disconnect A/C Relay.
3. Measure resistance between terminal 3 and 5 of A/C Relay connector (To sensor side)
  Specification: approximately 70~120Ω
  
  Fig 1: Measuring Resistance Between Terminal 3 And 5 Of A/C Relay Connector
  Courtesy of HYUNDAI MOTOR CO.
4. Is measure resistance within Specification?
  YES
  - Substitute with a known-good PCM and check for proper operation. If the problem is corrected, replace PCM and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.
  NO
  - Substitute with a known-good A/C Relay heater and check for proper operation. If the problem is corrected, replace A/C Relay and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.