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Home >> Chevrolet >> 2009 >> Impala SS >> Repair and Diagnosis >> External Pages >> Different car >> Section 249 (Lighting Systems) >> Diagnostic Information and Procedures >> DTC B2652 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2006 Chevrolet Monte Carlo and 2006 Chevrolet Impala. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the (C2) harness connector at the BCM.
  2. Verify that a test lamp illuminates between the B+ circuit terminal 2 and ground.
    • If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance. If the circuit tests normal and the B+ circuit fuse is open, test the supply voltage circuits listed below for a short to ground.

    Scan Tool Reference

    • Instrument panel lamp supply voltage circuit terminal 3 C2
    • Instrument panel lamp supply voltage circuit terminal 3 C6
  3. Ignition OFF, disconnect all of the instrument panel lamp components fed by the BCM supply voltage circuits listed below.
    • Instrument panel supply voltage circuit -terminal 3 C2
    • Instrument panel supply voltage circuit -terminal 3 C6
  4. Ignition ON, with a scan tool clear the DTC.
  5. Operate the vehicle within the conditions for running the DTC and verify the DTC does not reset.
    • If the DTC resets, test the instrument panel lamp supply voltage circuit for a short to ground. If the circuit test normal, replace the BCM.
  6. Reconnect each component one at a time and verify that the DTC does not reset as current.
    • If the DTC resets as current, test or replace the component responsible for setting the DTC.
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