2008 Jeep Grand Cherokee Owner's Manual - Page 160

160 UNDERSTANDING THE FEATURES OF YOUR VEHICLE Programming HomeLink Before You Begin If you have not trained any of the HomeLink buttons, erase all channels before you begin training. To do this, press and hold the two outside buttons for 20 seconds. The EVIC will display "CLEARING CHANNELS." Release the buttons when the EVIC message states "CHANNELS CLEARED." It is recommended that a new battery be placed in the hand-held transmitter of the device being programmed to HomeLink for more efficient training and accurate transmission of the radio-frequency signal. Your vehicle should be parked outside of the garage while training. 1. Turn the ignition switch to the ON/RUN position. 2. Place the hand-held transmitter 1-3 inches (3-8 cm) from the HomeLink buttons while keeping the EVIC display in view. For optimal training, point the battery end of the handheld transmitter away from the HomeLink . 3. Simultaneously press and hold both the chosen HomeLink button and the hand-held transmitter button until the EVIC display changes from "CHANNEL # TRAINING" to "CHANNEL # TRAINED." Then release both the HomeLink and hand-held transmitter buttons. If the EVIC display states "DID NOT TRAIN" repeat Step 3. If the signal is too weak, replace the battery in the original hand-held transmitter. It may take up to 30 seconds, or longer in rare cases. The garage door may open & close while you train.