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Home >> Genesis >> 2021 >> G90 3.3T Premium, 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

  5. Is the measured resistance within specification?

    YES 

    • Check ECM, A.A.F. connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.

    NO 

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