LEMON Manuals: Even more car manuals for everyone
Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1908 (Supplemental Inflatable Restraint System) >> Diagnostic Information and Procedures >> DTC B0085 or B0086 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2009 Saturn Vue. 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:
    • Side impact sensor
    • SDM module
    • Side impact sensor wiring harness connector
    • SDM wiring harness connector
  1. Ignition OFF, disconnect the appropriate side impact sensor connector.
  2. Disconnect the harness connector at the SDM.
  3. Ignition ON, test for less than 1 volt between the side impact sensor high circuit terminal B and ground.
    • 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 side impact sensor low circuit terminal A and ground.
    • If greater than the specified range, test the circuit for a short to voltage.
  5. Test for infinite resistance between the side impact sensor high circuit terminal B and ground.
    • If less than infinite resistance, test the circuit for a short to ground.
  6. Test for less than 1 ohm between the following side impact sensor high circuit terminals.
    • Right side impact sensor terminal B and SDM harness connector terminal 43.
    • Left side impact sensor terminal B and SDM harness connector terminal 42.
    • If greater than the specified range, test the circuit for an open/high resistance.
  7. Test for less than 1 ohm between the following side impact sensor low circuit terminals.
    • Right side impact sensor terminal A and SDM harness connector terminal 41.
    • Left side impact sensor terminal A and SDM harness connector terminal 40.
    • If greater than the specified range, test the circuit for an open/high resistance.
  8. If all circuits test normal, replace the appropriate side impact sensor.
  9. Reconnect all SIR components. Ignition ON, with a scan tool clear and recheck for DTCs.
    • If the side impact sensor DTC returns and is current, replace the SDM.
scientia non olet · About LEMON Manuals