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Home >> GMC >> 2012 >> Yukon Base, 4WD >> Repair and Diagnosis (Single Page) >> Transmission >> Transfer Case >> Transfer Case - Mp 3023/3024 (NQH) >> Diagnostic Information and Procedures >> Transfer Case Shift Control Switch Inoperative >> Circuit/System Testing
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Circuit/System Testing

  1. Review the scan tool data list mode switch selected and select difference mode with the transfer case shift control switch. Does the mode switch selected parameter on the scan tool change as you change modes on the switch?
  2. If the modes change according to the scan tool replace the transfer case control module, reprogram, complete the motor learn procedure. If the modes on the scan tool not change replace the switch.
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