Fob Programming

cen dm 03.13.003

The security system ECM can store up to four fob identification codes. Once the first fob has been programmed, there are never any vacant memory locations.

Important: As a security measure, all fobs must be coded during the same programming sequence. The first fob code is stored in all four memory locations. Taken together, these ensure that only the vehicle owner's fobs can be programmed into the system. If additional fobs are programmed, they overwrite the original code in locations two, three, and four, in that order.

The ECM provides a 20-second time period to program each fob. If the fob is not programmed within this time span, the system will exit the programming sequence.

After each valid code storage sequence, the system LED will indicate the completion of a learning cycle by turning off the LED for approximately 0.5 second, and unlocking the doors.

To program a fob, do the following steps:

  1. With the ignition keyswitch turned off, turn the program switch ON (flip the toggle DOWN). See Fig..

    Fig. 1, Program Switch

  2. Now turn the ignition keyswitch on. Note that the system LED illuminates continuously. See Fig.. This indicates that the ECM is ready to begin the learning sequence.

    1. System Status LED

    2. Overhead Panel

    3. Clock

    Fig. 2, Red System-Status LED

    3. Note: If the LED does not illuminate continuously at this point, repeat the first two steps.

  3. On the fob, press down both the LOCK and UNLOCK buttons at the same time and hold them down for at least three seconds. See Fig.. If the code was learned, the system LED flashes and the doors unlock.

    1. ALERT Button

    2. LOCK Button

    3. UNLOCK Button

    Fig. 3, Key Chain Fob (radio transmitter)

    4. Important: If no valid code was received, the system does not erase any stored data in that memory location. This is a security measure to ensure that a fob ID cannot be erased accidentally.

  4. Repeat the above step to program additional fobs, up to a total of four.
  5. When the programming sequence is over, return the system to normal operation by turning the program switch OFF (flip the toggle UP).
Note:
Parent topic: Keyless Security System, Optional
Document Number: 0000118667
Manual Publication Date: 2024-05-13
Topic Publication Date: 2024-06-06