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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1606 (Transfer Case - Mp 3023/3024-NQH) >> Diagnostic Information and Procedures >> DTC C0398 >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2010 GMC Sierra and 2010 Chevrolet Silverado. 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. Monitor the IPS and RPS parameters on the scan tool. Using the transfer case shift control switch, shift the transfer case into all modes. The IPS and RPS parameters should track each other.
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