LEMON Manuals: Even more car manuals for everyone
Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 145 (Engine Control System & Fuel - 4.8L, 5.3L, 6.0L And 6.2L - DTC P0335 To DTC P3449) >> DTC P3401, P3425, P3441, or P3449 >> Component Testing

Component Testing

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2007 GMC Yukon XL, 2007 GMC Yukon, 2007 Chevrolet Tahoe, 2007 Chevrolet Suburban, and 2007 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT: Perform the Circuit/System Testing  first.

Static Test

  1. Ignition OFF, disconnect the VLOM harness connector at the VLOM assembly.
  2. Connect the cable that is labeled resistance from the displacement on demand (DoD) tester to the VLOM connector.
  3. Connect the power leads from the DoD tester to B+ and ground. Test for 11-18 ohms of resistance on each VLOM solenoid.
    • If the resistance is not within the specified range for each solenoid, replace the VLOM assembly.
  4. Test for infinite resistance between each VLOM circuit terminal and the VLOM housing.
    • If less than infinite resistance, replace the VLOM assembly.

Dynamic Test

  1. Ignition OFF, disconnect the VLOM harness connector at the VLOM assembly.
  2. Connect the cable that is labeled power from the displacement on demand DoD tester to the VLOM connector.
  3. Connect the power leads from the DoD tester to B+ and ground.
  4. Command each VLOM solenoid ON and OFF using the DoD tester. You should be able to hear each solenoid turn ON and OFF.
    • If the function does not perform as specified, replace the VLOM assembly.
scientia non olet · About LEMON Manuals