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Home >> Chevrolet >> 2004 >> Impala SS >> Repair and Diagnosis >> External Pages >> Different car >> Section 763 (Object Detection System) >> Diagnostic Information and Procedures >> DTC B0987 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2008 Buick Lucerne. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition ON, observe the scan tool Mode LED parameter while cycling the lane departure warning switch. The parameter should change between On and Off.
    • If the parameter does not change between the specified values, replace the VDAAW module.
  2. Observe the mode LED while cycling the lane departure warning switch. The LED should turn ON and OFF when cycling between the commanded states.
    • If the LED is always OFF, test the control circuit terminal 16 at the headlamp switch harness connector for a short to voltage, short to ground, or an open/high resistance. If the circuit tests normal, test or replace the headlamp switch.
  3. If all circuits test normal, replace the VDAAW module.
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