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Home >> Chevrolet >> 2006 >> Impala SS >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - 5.3L - DTC P1682 To DTC P3401 >> DTC P3401, P3425, P3441, or P3449 >> Component Testing

Component Testing

  1. With the ignition OFF, disconnect the VLOM wire harness electrical connector. Connect the cable that is labeled POWER from the DoD tester to the electrical connector on the VLOM assembly. Connect both the positive and the negative power leads of the DoD tester to the respective battery terminals at the battery. Command each VLOM solenoid ON and OFF several times using the DoD tester. You should be able to hear the solenoids being energized and de-energized with each ON and OFF command.
    • If you cannot hear each solenoid being energized, replace the VLOM assembly.
  2. Disconnect the cable that is labeled POWER from the VLOM assembly. Connect the cable that is labeled RESISTANCE to the VLOM assembly. Connect the test leads from a DMM to the resistance test ports on the DoD tester. Set the DMM to measure resistance and zero out the DMM display. Press and hold each solenoid switch pad for solenoids #1 through #4, one at a time, on the DoD tester. Monitor the DMM display.
    • If each solenoid does not measure within 11-18 ohms of resistance, replace the VLOM assembly.
  3. Remove one DMM test lead from the DoD tester. Connect the DMM test lead to a good ground on the engine. Press and hold each solenoid switch pad for solenoids #1 through #4, one at time, on the DoD tester. Monitor the DMM display.
    • If continuity or resistance is detected for any VLOM solenoid, replace the VLOM assembly.
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