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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.

  • B153 Seat Belt Buckle
  • Seat belt switch harness connector
  • K36 Inflatable Restraint Sensing and Diagnostic Module
  • K36 Inflatable Restraint Sensing and Diagnostic Module wiring harness connector
  1. Ignition OFF.
  2. Disconnect the harness connector at the appropriate B153 Seat Belt Buckle.
  3. Test for less than 5 Ω between the low reference circuit terminal 2 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 each control circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit
      • If less than 2 Ω
    3. Replace the K36 Inflatable Restraint Sensing and Diagnostic Module.
    • If less than 5 Ω 
  4. Ignition ON, verify the appropriate Seat Belt Status parameter displays Buckled.
    • If the parameter does not change 
    1. Disconnect the harness connector at the K36 Inflatable Restraint Sensing and Diagnostic Module.
    2. Test for infinite resistance between the seat belt switch signal circuit terminal 1 and ground.
      • If less than infinite resistance, repair the short to ground on the circuit
      • If less than 2 Ω
    3. Replace the K36 Inflatable Restraint Sensing and Diagnostic Module
    • If the parameter changes 
  5. Install a 3 A fused jumper wire between the signal circuit terminal 1 and the low reference circuit terminal 2.
  6. Verify the appropriate Seat Belt Status parameter displays Buckled.
    • If the parameter does not change 
    1. Disconnect the harness connector at the K36 Inflatable Restraint Sensing and Diagnostic Module.
    2. Ignition ON.
    3. 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
      • If less than 1 V
    4. 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
    5. Replace the K36 Inflatable Restraint Sensing and Diagnostic Module.
    • If the parameter changes 
  7. Replace the B153 Seat Belt Buckle.
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