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Home >> Cadillac >> 2014 >> Escalade Base, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 6 (Transfer Case - Mp 3023/3024-NQH) >> Diagnostic Information and Procedures >> DTC C0321: Transfer Case Module Lock Circuit >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2014 GMC Yukon XL 1500, 2014 GMC Yukon, 2014 Chevrolet Tahoe, and 2014 Chevrolet Suburban 1500. However, it is still accessible from the selected car via links, so may be relevant.
  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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