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Tahoe / Yukon Service Manual

DTC B1C0A

Diagnostic Instructions Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic System Check - Vehicle Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis An overview of each diagnostic category can be found here: Diagnostic Procedure Instructions DTC Descriptor DTC B1C0A Rear Gate Missing Calibration Symptom Byte Information: Symptom Byte List Circuit/System Description When calibrating the liftgate position, the rear gate module is placed in a functional state to learn the liftgate travel limits. DTC B1C0A 54 will set automatically as an indicator that the system is in learn mode and not as a fault indicator. Once the travel limits are learned by the rear gate module, the rear gate module will exit calibration mode and DTC B1C0A 54 become a history code. Conditions for Running the DTC Ignition » On / Vehicle » In Service Mode Conditions for Setting the DTC B1C0A 54 Whenever the rear gate module is replaced or in learn mode. Actions Taken When the DTC Sets B1C0A 54 The power liftgate power open and power close functions will be inoperative Conditions for Clearing the DTC The DTC will be current until the liftgate calibration procedure has been completed. When the calibration procedure has been completed the DTC will be a history DTC. Reference Information Schematic Reference Liftgate Schematics Connector End View Reference Master Electrical Component List Description and Operation Liftgate Description and Operation Electrical Information Reference Circuit Testing Connector Repairs Testing for Intermittent Conditions and Poor Connections Wiring Repairs Scan Tool Reference Control Module References for scan tool information Circuit/System Testing

  1. Ignition ON.
  2. Perform the Service Programming System (SPS). The K194 Rear Gate Module should learn the travel limits, exit the calibration mode, and B1C0A 54 will become a history code. ⇒ If the K194 Rear Gate Module does not exit the calibration mode or if B1C0A 54 does not become a history code. Replace the K194 Rear Gate Module. ⇓ If the K194 Rear Gate Module does exit the calibration mode and B1C0A 54 becomes a history code.
  3. All OK. Repair Instructions Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair Verification For control module replacement, programming, and setup refer to: Control Module References