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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 977 (Supplemental Inflatable Restraint System) >> Diagnostic Information and Procedures >> DTC B0083-B0088 >> Circuit/System Testing

Circuit/System Testing

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    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 front end sensor
    • The SDM module
    • The front end sensor wiring harness connector
    • The SDM wiring harness connector
  1. Ignition OFF, disconnect the harness connector at the appropriate sensor.
  2. Disconnect the harness connector at the SDM.
  3. Ignition ON, test for less than 1 volt between the following signal circuit and ground.
    • Right front end sensor terminal 1
    • Left front end sensor terminal 1
    • Right front side impact sensor terminal B
    • Left front side impact sensor terminal B
    • Right rear side impact sensor terminal B
    • Left rear side impact sensor terminal B
    • If greater than the specified range, test the circuit for a short to voltage.
  4. Ignition ON, test for less than 1 volt between the low reference circuit and ground.
    • Right front end sensor terminal 2
    • Left front end sensor terminal 2
    • Right front side impact sensor terminal A
    • Left front side impact sensor terminal A
    • Right rear side impact sensor terminal A
    • Left rear side impact sensor terminal A
    • If greater than the specified range, test the circuit for a short to voltage.
  5. Test for infinite resistance between the signal circuit and ground.
    • Right front end sensor terminal 1
    • Left front end sensor terminal 1
    • Right front side impact sensor terminal B
    • Left front side impact sensor terminal B
    • Right rear side impact sensor terminal B
    • Left rear side impact sensor terminal B
    • If less than infinite resistance, test the circuit for a short to ground.
  6. Test for less than 1 ohm between the following signal circuit terminals.
    • Right front end sensor terminal 1 and SDM harness connector terminal 37.
    • Left front end sensor terminal 1 and SDM harness connector terminal 36.
    • Right front side impact sensor terminal B and the SDM harness connector terminal 43.
    • Left front side impact sensor terminal B and the SDM harness connector terminal 42.
    • Right rear side impact sensor terminal B and the SDM harness connector terminal 45.
    • Left rear side impact sensor terminal B and the SDM harness connector terminal 44.
    • If greater than the specified range, test the circuit for an open/high resistance.
  7. Test for less then 1 ohm between the following front end sensor low reference circuit terminals.
    • Right front end sensor terminal 2 and SDM harness connector terminal 39.
    • Left front end sensor terminal 2 and SDM harness connector terminal 38.
    • Right front side impact sensor terminal A and the SDM harness connector terminal 41.
    • Left front side impact sensor terminal A and the SDM harness connector terminal 40.
    • Right rear side impact sensor terminal A and the SDM harness connector terminal 47.
    • Left rear side impact sensor terminal A and the SDM harness connector terminal 46.
    • If greater than the specified range, test the circuit for an open/high resistance.
  8. If all circuits test normal, replace the appropriate sensor.
  9. Reconnect all SIR components. Ignition ON, with a scan tool clear and check for DTCs.
    • If the DTC returns and is current, replace the SDM.
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