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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1094 (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 2008 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT:
  • Refer to SIR Service Precautions .
  • When removing connectors inspect for damage or corrosion. Damage or corrosion in the following requires repair or replacement of the affected component/connector.
    • The pretensioner
    • The air bag module
    • The SDM module
    • The air bag wiring harness connector
    • The SDM wiring harness connector
    IMPORTANT: The connector and 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 CPA are engaged.
    • If the CPA or connector is not properly engaged, make the appropriate repair.
  2. Ignition OFF, disconnect the harness connector at the steering wheel module.
  3. With the appropriate adaptor, connect special tool J 38715-A  or SA9409Z-A  . See Special Tools .
  4. Ignition ON, verify the DTC is set as current.
    • If DTC is not set or is set as history, replace the steering wheel module.
  5. Ignition OFF, disconnect special tool J 38715-A  or SA9409Z-A  . See Special Tools .
  6. Disconnect the harness connector at the steering wheel module coil.
  7. With the appropriate adaptor, connect special tool J 38715-A  or SA9409Z-A  . See Special Tools .
  8. Ignition ON, verify the 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  or SA9409Z-A  and the adaptor. See Special Tools .
  10. Ignition ON, test for less than 1 volt between the appropriate high control circuit terminal and ground.
    • Stage 1 terminal 1
    • Stage 2 terminal 3
    • If greater than the specified range, test the control circuit for a short to voltage.
  11. Test for less than 1 volt between the appropriate low control circuit terminal and ground.
    • Stage 1 terminal 2
    • Stage 2 terminal 4
    • If greater than the specified range, test the control circuit for a short to voltage.
  12. Ignition OFF, test for infinite resistance between the appropriate high control circuit terminal and ground.
    • Stage 1 terminal 1
    • Stage 2 terminal 3
    • If not the specified value, test the control circuit for a short to ground.
  13. Test for infinite resistance between the appropriate low control circuit terminal and ground.
    • Stage 1 terminal 2
    • Stage 2 terminal 4
    • If not the specified value, test the control circuit for a short to ground.
  14. Disconnect the harness connector at the SDM.
  15. Test for less then 1 ohm between the following high control circuit terminals.
    • Steering wheel module coil connector Stage 1 terminal 1 (X3) and SDM terminal 9
    • Steering wheel module coil connector Stage 2 terminal 3 (X3) and SDM terminal 5
    • If not within the specified range, test the control circuit for an open/high resistance.
  16. Test for less then 1 ohm between the following low control circuit terminals.
    • Steering wheel module coil connector Stage 1 terminal 2 (X3) and SDM terminal 8
    • Steering wheel module coil connector Stage 2 terminal 4 (X3) and SDM terminal 4
    • If not within the specified range, test the circuit for an open/high resistance.
  17. If all circuits test normal, replace the SDM.
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