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Home >> Chevrolet >> 2018 >> Spark LT, Automatic CVT Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 86 (Seat Belt System) >> Diagnostic Information and Procedures >> DTC B0072 or B0073: Driver/Passenger Seat Belt Switch Circuit >> Component Testing

Component Testing

WARNING: This page is about a different car, the 2017 Chevrolet Spark. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the harness connector at the B153 Seat Belt Buckle.
  2. Test for less than 5 Ω between the signal terminal 2 and the low reference terminal 1.
    • If 5 Ω or greater 

      Replace the B153 Seat Belt Buckle.

    • If less than 5 Ω 
  3. Insert the seat belt into the buckle.
  4. Test for infinite resistance between the signal terminal 2 and the low reference terminal 1.
    • If less than infinite resistance 

      Replace the B153 Seat Belt Buckle.

    • If infinite resistance 
  5. All OK.
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