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Home › Cadillac › 2007 › XLR V › Repair and Diagnosis › Engine Performance › System › Engine Controls And Fuel - 4.4L - DTC P0010 To DTC P0154 › DTC P0033 › Circuit/System Verification

Circuit/System Verification

  1. Engine running, command the supercharger vacuum bypass valve control (SCB) solenoid, duty cycle from 0 percent to 90 percent in 10 percent increments with a scan tool. Listen and feel for a clicking at the supercharger SCB solenoid.
  2. Engine running, observe the scan tool SCB Solenoid Circuit Status parameter. The reading should change from incomplete to OK when commanding the SCB solenoid.
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