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Home >> Hyundai >> 2021 >> Tucson Ultimate, 4WD >> Repair and Diagnosis >> Restraints >> Air Bag, SRS >> Airbag System Diagnosis (2 Of 2) >> DTC B2502-00: Passenger Airbag Telltale Lamp Failure >> Wiring Inspection >> Telltale lamp Circuit Inspection

Telltale lamp Circuit Inspection

  1. Ignition "OFF".
  2. Disconnect the battery (-) terminal cable from the battery and wait at least one minutes.
  3. Disconnect SRSCM main harness connector.
  4. Connect the battery (-) terminal cable to the battery and Ignition "ON" & Engine "OFF".
  5. Measure voltage between Telltale lamp terminal of the SRSCM harness connector and chassis ground.

    Specification:  Batt Voltage

  6. Is the measured voltage within specifications?

    YES 

    • Check telltale lamp and 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 

    • Check airbag fuse, passenger compartment junction block, harness between junction block and SRSCM. Repair as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
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