If you have an EB, ED, EF, EL or AU (Series 1) Falcon, NC-NL Fairlane, or XG-XH Ute, you have a vehicle fitted with Fords Smartlock vehicle immobiliser. This post explains common faults with Smartlock and how to fix them.
A state of the art system when first introduced, Smartlock can cause problems with starting as these vehicles’ electrical systems get older and less reliable.
Smartlock is a complex system which uses a combination of a specially coded ignition barrel, Body Electronics Module (BEM) and ECU program to ensure the safety of your car from thieves. Smartlock has two main immobilisation functions that prevent starting your vehicle:
- A starter cut in the BEM, that prevents the vehicle from cranking
- A fuel cut in the ECU, that prevents the vehicle from starting
Solving each of these problems requires a different plan of attack. As we get lots of questions about Smartlock, we wrote this blog post to clarify and explain the most common fixes for these problems.
Smartlock Starter Cut – Engine does not crank
If your car will not turn over, the problem is most likely related to the BEM starter cut. Sometimes, knocking the dash to the left of the steering column fixes this problem temporarily. The good news is that this is cheap and easy to fix! A permanent fix is to either:
- Join the two starter wires that enter and exit the BEM to disable the Smartlock starter cut entirely (only recommended for engine conversions)
- Remove and disassemble the BEM, and either replace the starter cut relay, or clean the starter cut relay terminals and resolder the relay pins on the PCB. Read this tutorial on how to repair the BEM for more information.
It is important to note that a J3 Chip can not fix the starter cut as it is related to the BEM not the ECU.
Smartlock Fuel Cut – Engine cranks, but does not start
Smartlock has an injector cut, based inside the ECU. If your engine turns over but does not fire, the problem could be the Smartlock fuel cut in the ECU.
If the Smartlock light is flashing on your cluster, or you have done an engine conversion and can not get the vehicle to start, you use a noid light on an injector plug to see whether the injectors are firing while cranking the engine. If the injectors are not firing, this is most likely due to the Smartlock fuel cut. A J3 Chip can bypass Smartlock and will not affect the central locking.
Other Smartlock Issues
Some owners have other failures with Smartlock, ranging from not learning new keys to door locks not opening. These internal BEM problems are not in the scope of this guide but we suggest checking Fordmods or BoostedFalcon for solutions.
It is important to note that Smartlock can not stop an already running engine, so if your car cuts out randomly, the culprit is unlikely to be Smartlock.
Credit to Daniel Martin for the image.