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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 251 (Automatic Transmission - 2ML70 - DTC P0218 To DTC P0967) >> DTC P0562 or P0563 >> Circuit/System Testing

Circuit/System Testing

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. Ignition OFF, disconnect the X175 transmission 16-way harness connector at the transmission.
  2. Ignition ON, verify that a test lamp illuminates between the ignition voltage circuits listed below and ground.
    • Terminal 4
    • Terminal 12
    • If the test lamp does not illuminate, test the ignition circuit for a Short to Ground or an Open/High Resistance.
  3. If all circuits test normal, replace the control solenoid (w/body and TCM) valve assembly.
    • If the voltage is not within the specified value, test the Ignition Voltage circuit for an Open/High Resistance or Short to Ground.
    • If the voltage is within the specified range, replace the control solenoid (w/body and TCM) valve assembly.
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