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Home >> Genesis >> 2021 >> G70 2.0T Prestige, RWD >> Repair and Diagnosis >> Accessories & Equipment >> Interior/Exterior Trim >> Active Air Flap Diagnosis >> DTC U0100: Lost Communication With ECM/PCM 'A' >> Wiring Inspection >> CAN Communication Line Check >> CAN Communication Circuit Inspection (ECM ↔ A.A.F)

CAN Communication Circuit Inspection (ECM ↔ A.A.F)

  1. Ignition "OFF".
  2. Disconnect A.A.F connector and ECM connector.
  3. Measure the resistance between CAN-HIGH terminal of A.A.F harness connector and CAN-HIGH terminal of ECM harness connector.
  4. Measure the resistance between CAN-LOW terminal of A.A.F harness connector and CAN-LOW terminal of ECM harness connector.

    Specification  : below 1Ω

    3 

  5. Is the measured resistance within specification?

    YES 

    • Substitute with a known-good ECM and check for proper operation. If the problem is corrected, replace ECM and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.

    NO 

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