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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 338 (Transfer Case - Mp 3023/3024-NQH) >> Diagnostic Information and Procedures >> DTC C0321 >> Circuit/System Verification

Circuit/System Verification

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  1. Key ON, engine OFF.
  2. Connect a scan tool.
  3. Parking brake engaged. Transmission in Neutral.
  4. Using the Transfer Case Lock function of the Special Function feature of the scan tool, command the transfer case lock ON and OFF. You should be able to hear the encoder motor lock engage and disengage.
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