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Home >> Hummer >> 2009 >> H3 Base, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 3.7L - DTC P0013 To DTC P0315 >> DTC P0016 or P0017 >> Circuit/System Verification
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Circuit/System Verification

IMPORTANT: The scan tool control of the CMP actuator is inhibited when DTC P0016 or P0017 sets.
  1. Operate the vehicle at idle and at various engine speeds and load ranges while observing the CMP Variance, Desired CMP, and CMP Angle parameters with a scan tool.
  2. The CMP Variance should remain less than or equal to 1 degree unless the CMP actuator is being commanded. If the CMP actuator is commanded, the CMP Variance will rise for 1-2 seconds until the CMP Angle parameter matches the Desired CMP parameter. The CMP Variance should again return to less than or equal to 1 degree.
    • If the CMP Variance remains more than 1 degree for more than 3 seconds, continue with the Circuit/System Testing.
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