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Home >> Buick >> 2007 >> Allure CX >> Repair and Diagnosis >> External Pages >> Different car >> Section 13 (Instrument Panel System Displays & Gages) >> Diagnostic Information and Procedures >> Driver Information Center (DIC) Switch Inoperative >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2008 Buick LaCrosse and 2008 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the harness connector at the DIC.
  2. Ignition OFF, test for less than 1 ohm of resistance between the DIC ground circuit and ground.
    • If greater than 1 ohm, test the ground reference circuit for an open/high resistance.
  3. Ignition ON, verify all of the scan tool DIC Switch parameters are Inactive.
    • If any are not Inactive, test the signal circuits for a short to ground. If the circuit tests normal, replace the IPC.
  4. Ignition ON, install a 3-amp fused jumper wire between the signal circuits and the ground reference circuit terminal 4. Verify all of the scan tool DIC switch parameters are Active.
    • If any are not Active, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the IPC.
  5. If all circuits test normal, test or replace the DIC switch.
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