Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2003 Ford Focus L4-2.3L VIN ZFACTORY OEM SERVICE PROCEDURE
Keyless Entry Transmitter: Testing and Inspection
REMOTE TRANSMITTER PROGRAMMING
NOTE:
- A maximum of four remote transmitter can be programmed to the vehicle. Programming must be done at the same time for all the remote transmitters.
- Before entering the remote transmitter programming mode, make sure that the vehicle battery is fully charged and that the anti-theft system is not armed or triggered (if equipped).
1. Close all doors to make sure conflicting chimes do not sound during programming.
2. Turn the ignition switch from position I to position II four times within six seconds.
3. Turn the ignition switch to position 0.
4. A chime sounds and an LED will illuminate to indicate that the learning mode has been accessed and it is possible to program remote transmitters.
5. Within 10 seconds of the previous step, press any button on the remote transmitter being programmed until a chime is heard and the LED flashes. This indicates a new transmitter code has been successfully received.
6. After each successful remote transmitter programming, another 10 second learning mode is automatically entered, up to a maximum of four times.
7. To program additional remote transmitters, repeat step 5.
8. The system will exit the learning mode if the ignition switch is turned to position III, no new remote transmitter is programmed during the 10 seconds or if four remote transmitters have been programmed.
9. NOTE: An incorrect programming procedure does not affect the stored codes.
After successful programming, only the new programmed remote transmitters will be accepted.
10. Test all the programmed remote transmitters, by activating and deactivating the remote locking and unlocking functions.
NOTE:
- A maximum of four remote transmitter can be programmed to the vehicle. Programming must be done at the same time for all the remote transmitters.
- Before entering the remote transmitter programming mode, make sure that the vehicle battery is fully charged and that the anti-theft system is not armed or triggered (if equipped).
1. Close all doors to make sure conflicting chimes do not sound during programming.
2. Turn the ignition switch from position I to position II four times within six seconds.
3. Turn the ignition switch to position 0.
4. A chime sounds and an LED will illuminate to indicate that the learning mode has been accessed and it is possible to program remote transmitters.
5. Within 10 seconds of the previous step, press any button on the remote transmitter being programmed until a chime is heard and the LED flashes. This indicates a new transmitter code has been successfully received.
6. After each successful remote transmitter programming, another 10 second learning mode is automatically entered, up to a maximum of four times.
7. To program additional remote transmitters, repeat step 5.
8. The system will exit the learning mode if the ignition switch is turned to position III, no new remote transmitter is programmed during the 10 seconds or if four remote transmitters have been programmed.
9. NOTE: An incorrect programming procedure does not affect the stored codes.
After successful programming, only the new programmed remote transmitters will be accepted.
10. Test all the programmed remote transmitters, by activating and deactivating the remote locking and unlocking functions.
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.