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Home >> Buick >> 2021 >> Envision Preferred, AWD >> Repair and Diagnosis >> Restraints >> Restraints Control Systems >> Seat Belts >> Diagnostic Information and Procedures >> DTC B1A32 >> Circuit/System Testing

Circuit/System Testing

NOTE:

When removing connectors inspect for damage or corrosion. Damage or corrosion in the following requires repair or replacement of the affected component/connector.

  • P16 Instrument Panel Cluster Control Module
  • K36 Restraints Control Module
  1. Ignition OFF, disconnect the harness connector at the P16 Instrument Panel Cluster Control Module. It may take up to 2 min for all vehicle systems to power down.
  2. Test for less than 10 Ω between the ground circuit terminal and ground.
    • If 10 Ω or greater 
    1. Ignition OFF.
    2. Test for less than 2 Ω in the ground circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, repair the open/high resistance in the ground connection.
    • Go to next step: If less than 10 Ω 
  3. Connect a test lamp between the control circuit terminal and ground, ignition ON.
  4. Verify the test lamp is OFF when commanding the Passenger Seat Belt Reminder Indicator OFF with a scan tool.
    • If the test lamp is ON 
    1. Ignition OFF, disconnect the harness connector at the K36 Restraints Control Module, ignition ON.
    2. Test for less than 1 V between the control circuit and ground.
      • If 1 V or greater, repair the short to voltage on the circuit.
      • If less than 1 V, replace the K36 Restraints Control Module.
    • Go to next step: If test lamp is OFF 
  5. Verify the test lamp is ON when commanding the Passenger Seat Belt Reminder Indicator ON with a scan tool.
    • If the test lamp is OFF 
    1. Ignition OFF, disconnect the harness connector at the K36 Restraints Control Module.
    2. Test for infinite resistance between the control circuit terminal and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
    3. Test for less than 2 Ω in the control circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, replace the K36 Restraints Control Module.
    • Go to next step: If test lamp is ON 
  6. Test or replace the P16 Instrument Panel Cluster Control Module.
  7. Verify the DTC does not set.
    • If the DTC sets 

      Replace the K36 Restraints Control Module.

    • Go to next step: If the DTC does not set 
  8. All OK.
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