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Home >> Hyundai >> 2015 >> Sonata Eco >> Repair and Diagnosis >> Accessories & Equipment >> Headlights >> Auto Headlamp Leveling System Diagnosis (Except HEV) >> DTC C1522: Headlamp Switch Signal Line Open >> Wiring Inspection >> Ground Circuit Inspection

Ground Circuit Inspection

  1. Ignition "OFF".
  2. Disconnect AHLDM connector.
  3. Measure resistance between ground terminal of AHLDM harness connector and chassis ground.

    Specification:  below 1.0 [Ω]

  4. Is the measured resistance within specification?

    YES 

    • Substitute with a known-good "head lamp" and check for proper operation. If the problem is corrected, replace "head lamp" and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.
    • Substitute with a known-good "AHLDM" and check for proper operation. If the problem is corrected, replace "AHLDM" and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.
    • Repair or replace as necessary and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.

    NO