Keyless Entry Transmitter: Testing and Inspection

Initialisation Procedure - All Remote Handsets

Every signal from the remote handset contains the transmitter identification code and a rolling code. The GEM (generic electronic module) checks the codes and only responds if the signal is from a valid transmitter. During vehicle production, the remote handsets supplied with the vehicle are initialized to set their individual transmitter identification codes and synchronize their respective rolling codes with the GEM (generic electronic module). If a replacement or additional remote handset is to be used with the vehicle, the initialization procedure must be repeated. During the procedure, all remote handsets for use with the vehicle must be initialized.

Initialization Procedure
^ Ensure the vehicle is unlocked and the driver and front passenger doors are closed.
^ Install a key/remote handset in the ignition switch, then turn the ignition switch to position I and back to position 0 in less than 5 seconds to put the GEM (generic electronic module) into the initialization mode. Continue the procedure within 30 seconds of turning the ignition switch to position 0.
^ Remove the key/remote handset from the ignition switch.
^ Press and hold the unlock button for a maximum of 15 seconds. During this time, momentarily press the lock button three times within 10 seconds.
^ Release both buttons.
^ Successful initialization is indicated by the GEM (generic electronic module) locking then unlocking the vehicle. If this does not occur, repeat step D.
^ Repeat steps D. and E. with all other remote handsets belonging to the vehicle (4 maximum). Begin the initialization of each remote handset within 30 seconds of completing the previous initialization, or the GEM (generic electronic module) will drop out of the initialization mode and the complete procedure will have to be started again.