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Home >> Pontiac >> 2009 >> Vibe Base, 2.4 0, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 4 (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 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT: Refer to SIR Service Precautions .
When removing the connectors inspect for damage or corrosion. Damage or corrosion to the following requires repair or replacement of the affected component/connector:
  • Air bag module
  • SDM module
  • Air bag wiring harness connector
  • SDM wiring harness connector
    IMPORTANT: 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 module connector and the 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 module.
  3. With the appropriate load tool adaptor, connect special tool J 38715-A  in place of the steering wheel module. See Special Tools .
  4. Ignition ON, verify 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 module, and cycle the ignition ON. See Special Tools . If the DTC resets after reconnecting the module, replace the steering wheel module.
  5. Ignition OFF, disconnect special tool J 38715-A  and adaptor. See Special Tools .
  6. Disconnect the in-line harness connector at the steering wheel module coil.
  7. With the appropriate load tool adaptor, connect special tool J 38715-A  . See Special Tools .
  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 adaptor. See Special Tools .
  10. Ignition ON, test for less than 1 volt between the appropriate high control circuit listed below and ground:
    • Steering wheel module coil connector Stage 1 terminal 1 X3
    • Steering wheel module coil connector Stage 2 terminal 3 X3
    • If greater than the specified range, test the circuit for a short to voltage.
  11. Test for less than 1 volt between the appropriate low control circuit listed below and ground:
    • Steering wheel module coil connector Stage 1 terminal 2 X3
    • Steering wheel module coil connector Stage 2 terminal 4 X3
    • If greater than the specified range, test the circuit for a short to voltage.
  12. Ignition OFF, test for infinite resistance between the appropriate high control circuit listed below and ground:
    • Steering wheel module coil connector Stage 1 terminal 1 X3
    • Steering wheel module coil connector Stage 2 terminal 3 X3
    • If not the specified value, test the circuit for a short to ground.
  13. Test for infinite resistance between the appropriate low control circuit listed below and ground:
    • Steering wheel module coil harness connector Stage 1 terminal 2 X3
    • Steering wheel module coil harness connector Stage 2 terminal 4 X3
    • If not the specified value, test the circuit for a short to ground.
  14. Disconnect the harness connector at the SDM.
  15. Test for less than 1 ohm between the appropriate high control circuit terminals listed below:
    • Steering wheel module coil harness connector Stage 1 terminal 1 X3 and SDM terminal 9
    • Steering wheel module coil harness connector Stage 2 terminal 3 X3 and SDM terminal 5
    • If greater than the specified range, test the circuit for an open/high resistance.
  16. Test for less than 1 ohm between the appropriate low control circuit terminals listed below:
    • Steering wheel module coil harness connector Stage 1 terminal 2 X3 and SDM terminal 8
    • Steering wheel module coil harness connector Stage 2 terminal 4 X3 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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