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Home >> Chevrolet >> 2006 >> Uplander Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - 3.5L - DTC P0496 To DTC U1017 >> DTC P1640, P1650 or P1660 >> Circuit/System Testing

Circuit/System Testing

  1. Observe the scan tool for any other DTCs.
    • If DTC P0560 is also set, refer to DTC P0560 to repair the charging system.
  2. Observe the Output Driver Status with a scan tool.
    • If any parameter does NOT indicate OK, test for a short to voltage on the control circuit of the component that indicated a fault.
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