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Home >> GMC >> 2023 >> Terrain AT4 >> Repair and Diagnosis >> Restraints >> Restraints Control Systems >> Seat Belts >> Diagnostic Information and Procedures >> DTC B059A >> Circuit/System Testing

Circuit/System Testing

Refer to SIR Disabling and Enabling .

Refer to SIR Service Precautions .

NOTE:

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

  • A98 Front Overhead Console Assembly.
  • K36 Inflatable Restraint Sensing and Diagnostic Module
  1. Ignition OFF.
  2. Disconnect the harness connector at the A98 Front Overhead Console Assembly.
  3. Test for less than 10 Ω between the ground circuit terminal 5 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 
  4. Passenger seat occupied.
  5. Test for less than 11 V between the control circuit terminal 13 and ground.
    • If 11 V or greater 
    1. Ignition OFF.
    2. Verify the SIR system is disabled.
    3. Disconnect the harness connector at the K36 Inflatable Restraint Sensing and Diagnostic Module.
    4. Ignition ON, vehicle in Service Mode.
    5. 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 Inflatable Restraint Sensing and Diagnostic Module.
    • Go to next step: If less than 11 V 
  6. Test for greater than 25 Ω between the control circuit terminal 13 and ground.
    • If 25 Ω or less 
    1. Ignition OFF.
    2. Verify the SIR system is disabled.
    3. Disconnect the harness connector at the K36 Inflatable Restraint Sensing and Diagnostic Module.
    4. Test for infinite resistance between the control circuit and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
    5. 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.
    • Go to next step: If greater than 25 Ω 
  7. Test or replace the A98 Front Overhead Console Assembly.
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