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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 255 (Engine Control System & Fuel - Hybrid (Hp2) 6.0L (LFA) - DTC P0700 To DTC P3449) >> DTC P3401, P3425, P3441, or P3449 >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2008 GMC Yukon and 2008 Chevrolet Tahoe. However, it is still accessible from the selected car via links, so may be relevant.
  1. Engine running, command the affected cylinder deactivation solenoid ON and OFF with a scan tool while observing the following cylinder deactivation control circuit status parameters:
    • Cylinder 1, 4, 6, or 7 Solenoid Control Ckt. Short Gnd Test Status
    • Cylinder 1, 4, 6, or 7 Solenoid Control Ckt. Open Test Status
    • Cylinder 1, 4, 6, or 7 Solenoid Control Ckt. Short Volts Test Status

      Each parameter should toggle between OK and Not Run or Not Run and OK

  2. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
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