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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1289 (Supplemental Inflatable Restraint System) >> Diagnostic Information and Procedures >> DTC B0012 or B0013 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT: When removing connectors inspect for damage, corrosion or poor connection. Damage or corrosion to the following requires repair or replacement of the affected component/connector:
  • Pretensioner
  • Air bag module
  • SDM module
  • Air bag wiring harness connector
  • SDM wiring harness connector

The connector and connector position assurance (CPA) may seat independent of each other. Both the connector and CPA should seat with an audible and/or tactile click. The CPA isolates the shorting-bars within the connector allowing the deployment circuit to operate properly.
  1. Verify that the steering wheel inflator restraint module connector and CPA are engaged.
    • If the above condition is not found, make the appropriate repair.
  2. Ignition OFF, disconnect the harness connector at the steering wheel inflator module.
  3. With the appropriate load tool adaptor, connect J 38715-A  in place of the steering wheel inflator module.
  4. Ignition ON, with a scan tool, verify the appropriate DTC is set as current.
    • If the DTC is not set or is set as history, cycle ignition OFF, disconnect the adapter and J 38715-A  , reconnect the harness connector at the steering wheel inflator module, and cycle the ignition ON. If the DTC resets after reconnecting the module, replace the steering wheel inflator module.
  5. Ignition OFF, disconnect J 38715-A  and the adaptor.
  6. Disconnect the steering wheel module coil in-line connector.
  7. With the appropriate load tool adaptor, connect special tool J 38715-A  .
  8. Ignition ON, with a scan tool, verify DTC is set as current.
    • If DTC is not set or is set as history, replace the steering wheel module coil.
  9. Ignition OFF, disconnect special tool J 38715-A  and the adaptor.
  10. Disconnect the harness connector at the SDM.
  11. Ignition ON, test for less than 1 volt between the appropriate high circuit and ground.
    • Steering wheel module coil connector Stage 1 terminal A X1
    • Steering wheel module coil connector Stage 2 terminal A X2
    • If greater than the specified range, test the circuit for a short to voltage.
  12. Test for less than 1 volt between the appropriate low circuit and ground.
    • Steering wheel module coil connector Stage 1 terminal B X1
    • Steering wheel module coil connector Stage 2 terminal B X2
    • If greater than the specified range, test the circuit for a short to voltage.
  13. Ignition OFF, test for infinite resistance between the appropriate high circuit and ground.
    • Steering wheel module coil connector Stage 1 terminal A X1
    • Steering wheel module coil connector Stage 2 terminal A X2
    • If less than the specified value, test the circuit for a short to ground.
  14. Test for infinite resistance between the appropriate low circuit and ground.
    • Steering wheel module coil connector Stage 1 terminal B X1
    • Steering wheel module coil connector Stage 2 terminal B X2
    • If less than the specified value, test the circuit for a short to ground.
  15. Test for less then 1 ohm between the SDM connector and the air bag module connector high circuit.
    • Steering wheel module coil connector Stage 1 terminal A X1 and SDM terminal 9
    • Steering wheel module coil connector Stage 2 terminal A X2 and SDM terminal 5
    • If greater than the specified range, test the circuit for an open/high resistance.
  16. Test for less then 1 ohm between the SDM connector and the air bag module connector low circuit.
    • Steering wheel module coil connector Stage 1 terminal B X1 and SDM terminal 8
    • Steering wheel module coil connector Stage 2 terminal B X2 and SDM terminal 4
    • If greater than the specified range, test the circuit for an open/high resistance.
  17. If all circuits test normal, replace the SDM.
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