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Home >> Hyundai >> 2021 >> Ioniq Hybrid SEL >> Repair and Diagnosis >> Accessories & Equipment >> Headlights >> Adaptive Front Lighting System Diagnosis (HEV) >> DTC B1603-88: CAN Bus Off Fault >> Wiring Inspection >> CAN Communication Circuit Inspection >> Check CAN BUS Open

Check CAN BUS Open

  1. Ignition "OFF
  2. Disconnect CAN communication modules.
  3. Check continuity between CAN-HIGH terminal of DLC harness connector and CAN HIGH terminal of each module.
  4. Check continuity between CAN-LOW terminal of DLC harness connector and CAN LOW terminal of each module.

    Specification:  Continuity (below 1.0Ω)

  5. Is the measured resistance within specification?

    YES 

    NO 

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