GM Service Manual Online
For 1990-2009 cars only

The midgate control module monitors 2 hall sensors located within the motor assembly to determine the window position and motor speed. The control module uses the window position data to set the soft stop locations and when controlling the operation of the latch release actuators and rear window defogger. Window motor speed is used during express operation and is a necessary input for the anti-pinch feature.

De-initialization

This procedure is used to clear the existing window position memory and load profile, which will allow the system to be re-initialized after components other than the motor/module assembly are serviced.

The following steps must be completed within 6 seconds:

  1. Cycle the ignition ON and OFF 5 times.
  2. Turn the ignition ON.
  3. Press and release the IP midgate window switch in the DOWN position.

If the glass did not move in step 3 the de-initialization is complete.

Initialization

This procedure is used after a new motor/module assembly is installed or any other midgate service which required the de-initialization to be performed.

  1. Turn the ignition ON.
  2. Press and hold the IP midgate window switch in the DOWN position.
  3. Continue to hold the switch in the DOWN position for 1 second after the end of travel is reached.
  4. Press and hold the IP midgate window switch in the UP position.
  5. Continue to hold the switch in the UP position for 1 second after the end of travel is reached.