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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 >> DTC B0933 >> 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 electronic compass module.
  2. Ignition OFF, test for less than 1.0 ohm of resistance between the ground circuit terminal 14 and ground.
    • If greater than the specified value, test the ground circuit for an open/high resistance.
  3. Ignition ON, verify that a test lamp illuminates when connected between the ignition 1 voltage circuit terminal 13 and ground circuit terminal 14.
    • If the test lamp does not illuminate, test the ignition 1 voltage circuit for a short to ground or an open/high resistance.
  4. Ignition ON, verify a test lamp does not illuminate when connected between the compass sensor feed terminal 12 and the ignition 1 voltage circuit terminal 13.
    • If the test lamp illuminates, test the compass sensor feed terminal 12 for short to ground.
  5. Ignition ON, verify a test lamp does not illuminate when connected between the compass sensor return terminal 11 and the ignition 1 voltage circuit terminal 13.
    • If the test lamp illuminates, test the compass sensor return terminal 11 for a short to ground.
  6. If all circuits test normal, test or replace the electronic compass module.
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