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. |
Window Learn Cycle Manual Learn Procedure
Important: The driver information center (DIC) will
display the message See Manual - Tailgate anytime a learn is required except after
the installation of a new regulator. When a module is not learned, or in a window
fault state, only the window remains functional.
- Activate the window up switch using the key cylinder or overhead console
switch and maintain switch activation for 2 seconds after the window has stalled in
the fully closed position.
Important: The window may be in any position to start
the re-learn, but the up operation must be performed first.
- Activate the window down switch and maintain switch activation for 2 seconds
after the window has stalled in the fully open position.
Window Learn Cycle Scan Tool Learn Procedure
Follow the instructions in Special Functions on the scan tool to perform the
window learn cycle.
