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Home >> Pontiac >> 2007 >> Grand Prix Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 103 (Cellular System, Entertainment System, And Navigation System) >> Diagnostic Information and Procedures >> DTC B2476 >> 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 inside rearview mirror.
  2. Test for greater than 1 ohm between the keypad supply voltage terminal 12 and ground.
    • If less than specified value, repair short to ground or replace the VCIM.
  3. Ignition ON, test for 9.8-10.2 volts between keypad supply voltage terminal 12 and ground.
    • If less than the specified range, repair open circuit or replace the VCIM.
    • If greater than the specified range, repair short to voltage or replace the VCIM.
  4. If all circuit test normal, replace the inside rearview mirror.
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