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Home >> Buick >> 2007 >> Lucerne CX >> Repair and Diagnosis >> External Pages >> Different car >> Section 232 (Engine Controls - 3.5L - DTC P0496 To DTC U1017) >> DTC P0601-P0607, P1600, P1621, P1627, P1680, P1681, P1683 or P2610 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2006 Pontiac Montana SV6, 2006 Chevrolet Uplander, and 2006 Buick Terraza. However, it is still accessible from the selected car via links, so may be relevant.
  1. Observe the DTCs with the scan tool.
    • If DTC P0602 is set, attempt to program the PCM before replacing the PCM. Refer to.
    • If DTC P0602 resets, replace the PCM.
  2. Test the voltage and ground circuits to the control module for the following conditions:
    • A short
    • An open
    • High resistance
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