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Home >> Chevrolet >> 2013 >> Spark LS, Automatic Trans >> Repair and Diagnosis >> Restraints >> Restraints Control Systems >> Seat Belt System >> Diagnostic Information and Procedures >> Seat Belt Indicator Malfunction - Passenger >> Circuit/System Testing
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Circuit/System Testing

Seat Belt Buckle Malfunction

    NOTE:

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

    • B153 Seat Belt Buckle
    • Seat Belt Buckle harness connector
    • K36 Inflatable Restraint Sensing and Diagnostic Module
    • Inflatable Restraint Sensing and Diagnostic Module harness connector
  1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the B153P Seat Belt Buckle-Passenger. It may take up to 2 minutes for all vehicle systems to power down.
  2. Test for less than 5 Ω between the low reference circuit terminal 2 (AY0) or 1 (AYF) and ground.
    • If 5 Ω or greater 
    1. Disconnect the harness connector at the K36 Inflatable Restraint Sensing and Diagnostic Module.
    2. Test for less than 2 Ω in the low reference 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 Inflatable Restraint Sensing and Diagnostic Module.
      • If less than 5 Ω 
  3. Ignition ON.
  4. Verify the scan tool Passenger Seat Belt Status parameter is Buckled.
    • If not Buckled 
    1. Disconnect the harness connector at the K36 Inflatable Restraint Sensing and Diagnostic Module.
    2. Test for infinite resistance between the Seat Belt Buckle signal circuit terminal 1 (AY0) or 2 (AYF) and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If less than 2 Ω, replace the K36 Inflatable Restraint Sensing and Diagnostic Module.
    • If Buckled 
  5. Install a 3 A fused jumper wire between the signal circuit terminal 1 (AY0) or 2 (AYF) and the low reference circuit terminal 2 (AY0) or 1 (AYF).
  6. Verify the scan tool Passenger Seat Belt Status parameter is Unbuckled.
    • If not Unbuckled 
    1. Disconnect the harness connector at the K36 Inflatable Restraint Sensing and Diagnostic Module, ignition ON.
    2. Test for less than 1 V between the signal circuit and ground.
      • If 1 V or greater, repair the short to voltage on the circuit.
    3. Test for less than 2 Ω in each 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 Inflatable Restraint Sensing and Diagnostic Module.
    • If Unbuckled 
  7. Test or replace the B153P Seat Belt Buckle-Passenger.

Seat Belt Indicator Malfunction

  1. Ignition OFF, disconnect the harness connector at the P17 Info Display Module. It may take up to 2 minutes for all vehicle systems to power down.
  2. Test for less than 10 Ω between the ground circuit terminal 7 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.
      • If less than 10 Ω 
  3. Connect a test lamp between the control circuit terminal 11 and ground, ignition ON.
  4. Verify with a scan tool, command the Passenger Seat Belt Reminder Indicator ON and OFF, the test lamp should turn ON and OFF while changing between the commanded states.
    • If the test lamp is always ON 
    1. Ignition OFF, disconnect the harness connector at the K36 Inflatable Restraint Sensing and Diagnostic Module, ignition ON.
    2. Test for less than 1 V between the control circuit and ground.
      • If 1V or greater, repair the short to voltage on the circuit.
      • If less than 1V, replace the K36 Inflatable Restraint Sensing and Diagnostic Module.
    • If the test lamp is always OFF 
    1. Ignition OFF, disconnect the harness connector at the K36 Inflatable Restraint Sensing and Diagnostic Module.
    2. Test for infinite resistance between the control circuit terminal 4 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 Inflatable Restraint Sensing and Diagnostic Module.
    • If test lamp turns ON and OFF 
  5. Replace the P17 Info Display Module.
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