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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 370 (Engine Controls And Fuel - Hybrid (LZ1) - DTC P0010 Through DTC P0341) >> Diagnostic Information and Procedures >> DTC P0107 or P0108 >> Component Testing

Component Testing

WARNING: This page is about a different car, the 2011 GMC Yukon, 2011 Chevrolet Tahoe, and 2011 Cadillac Escalade. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:

You must perform the Circuit/System Testing in order to verify the integrity of the MAP sensor circuits before proceeding with the Component Testing.

  1. Turn ON the ignition, with the engine OFF, and remove the MAP sensor.
  2. Install a 3 A fused jumper wire between the 5 V reference circuit terminal 1 and the corresponding terminal of the MAP sensor.
  3. Install a jumper wire between the low reference circuit terminal 2 of the MAP sensor and ground.
  4. Install a jumper wire to the MAP sensor signal circuit terminal 3.
  5. Connect a DMM between the jumper wire from the MAP sensor signal circuit terminal 3 and ground.
  6. Install the J-35555 to the MAP sensor vacuum port. Slowly apply vacuum to the sensor while observing the voltage on the DMM. The voltage should vary between 0-5.2 V without any spikes or dropouts.
    • If the voltage is not within the specified range or is erratic, replace the MAP sensor.
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