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Home >> Pontiac >> 2008 >> Grand Prix Base >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Instrument Panel System Displays & Gages >> Diagnostic Information and Procedures >> DTC B0931 >> Circuit/System Testing

Circuit/System Testing

  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 voltage circuit terminal 13 and ground.
    • If the test lamp does not illuminate, test the ignition voltage circuit for an open/high resistance.
  4. Test for less than 1 ohm of resistance at the compass clock signal circuit terminal 12 and the compass data signal circuit terminal 11.
    • If greater than the specified value, test the compass clock signal circuit and the compass data signal circuit for an open/high resistance. If the circuit(s) test normal, replace the driver information center (DIC).
  5. If all circuits test normal, test or replace the electronic compass module.
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