LEMON Manuals: Even more car manuals for everyone
Home >> Hyundai >> 2021 >> Ioniq Hybrid SEL >> Repair and Diagnosis >> Engine Mechanical >> Cooling System (Mechanical) >> Active Air Flap-Left Diagnosis (HEV) >> 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 

scientia non olet · About LEMON Manuals