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Home >> GMC >> 2006 >> Sierra 1500 HD, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1046 (Engine Controls And Fuel - 6.6L - DTC P0016 To DTC P02E0) >> DTC P02E0 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2008 GMC Sierra, 2008 GMC Cab & Chassis Sierra, 2008 Chevrolet Silverado, and 2008 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. With the ignition OFF, disconnect the ECM and the IAF valve. Test the following circuits for a short to voltage, short to ground, or open/high resistance:
    • AI Motor Control 1 circuit terminal A
    • AI Motor Control 2 circuit terminal B
    • If a condition is found repair the affected circuit.
  2. Connect the ECM. Ignition ON, and the IAF disconnected, measure for 12 volts between the following circuits and ground:
    • IA Motor Control 1 circuit terminal A
    • IA Motor Control 2 circuit terminal B
    • If voltage is less than 12 volts on either circuit, replace the ECM.
    • If the voltage is 12 volts on both circuits, replace the IAF valve.
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