Window Learn Cycle Conditions

The endgate module window learn cycle must be performed whenever the following conditions exists:

• A service part has been installed in the vehicle. The endgate module needs to learn window position and VIN for that vehicle. The learn procedure accomplishes both.
• An endgate module has been swapped from one vehicle to another. When an endgate that has been learned in one vehicle is moved to another, the module will detect a VIN mismatch condition, DTC B1015, and enter a window fault mode until the re-learn procedure has been performed.
• Loss of battery while the window is moving-This condition causes a window fault state because the module would not have been able to write the new position information in electrically erasable programmable read only memory (EEPROM) prior to the disconnect.
  IMPORTANT: A battery disconnect when the window output is inactive will not cause a fault state.
• Any fault condition, DTC B3966, which causes the window to enter the window fault state such as:
  • Out of range position-In most cases, a window re-learn will correct this issue with no other action required.
  • Open and or short circuits on the hall signal, hall sensor source or hall sensor return, or a faulty hall sensor-In this case, the circuit fault must be repaired before the window can be successfully re-learned.
• Installation of a new window regulator into a vehicle-This condition should be re-learned via the scan tool. The manual learn will only re-learn position if the window is already in a fault state.