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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 144 (Automatic Transmission - 6L50/6L80/6L90 - DTC P0218 To DTC P0977) >> DTC P0851 or P0852 >> Component Testing

Component Testing

WARNING: This page is about a different car, the 2007 GMC Yukon XL, 2007 GMC Yukon, 2007 Cadillac Escalade EXT, 2007 Cadillac Escalade ESV, and 2007 Cadillac Escalade. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, transmission in Park or Neutral, disconnect the transmission 16-way connector and the IMS from the control solenoid (w/body and TCM) valve assembly.
  2. Test for infinite resistance between the control solenoid (w/body and TCM) valve assembly 16-way connector pin 3 and the IMS connector pin on the control solenoid (w/body and TCM) valve assembly side with the switch in the Open position.
    • If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the control solenoid (w/body and TCM) valve assembly.
  3. Test for infinite resistance between the IMS connector pin F and the IMS case ground with the switch in the Open position.
    • If not the specified value, replace the IMS.
  4. Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection .
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