Central Locking N16

[Deeshana]

Guy's I've got an N16 facelift (n17) and I didn't use the car for a while and the central locking doesn't work. I think rats are the culprit (car was outstation locked inside a garage)

Are the fuses bad or wiring damaged? Anyone knows the location of the central locking fuse?

Thanks in advance!

[Vengeance]

Its very unlikely that the Central Locking Control Unit is fried, rats can do plenty of damage to the electricals of a car if they lived in it for a certain amount of time, speaking form personal experience.

Just inspect all the fuses (there's only about 10-15) and replace them if any are blown.

Inspect the car and check for evidence of rats in places where the rats are likely to have lived in (under the carpets, seats, behind the dashboard etc). They'll definitely leave a bad smell and biting marks in things made out of rubber. If you have sufficient evidence, its highly likely that some of the wires are bitten off.

Remove the negative battery cable before you begin working on the electronics.

Get a multimeter with continuity and check for continuity on the central locking wires, the ground of the battery will connect directly to the CLCU and the positive end will connect via a fuse. Then check the wires going from the CLCU to the 4 actuators starting with the master actuator (driver's door one).

EDIT: If the wires are fine, then its the CLCU you have to check. Its a unit with 2 relays, some resistors, diodes and capacitors for stabalizing the voltage. This is a very basic unit if you know your way around circuits. You can check the relays for a clicking noise to confirm whether they are working when the central lock is being used. Replace any broken components and the central locking should work normally. Keep in mind that some CLCUs have a fuse within the circuit itself.

Edited May 4, 2016 by maxxarox

[NRX]

I'm not sure where it is really located, but it should be mentioned on the fuse box or under the fuse box cover. I hope you know there are two fuse boxes one in the engine bay and the other one near the steering column.

[Deeshana]

I'm not sure where it is really located, but it should be mentioned on the fuse box or under the fuse box cover. I hope you know there are two fuse boxes one in the engine bay and the other one near the steering column.

I did have checked both but I couldn't find it.

[Twin Turbo]

There's no fuse labeled central locking, intend the cabin electrics including courtesy lights,power mirrors run off a single fuse

it's located in the sub fuse box in the driver side.

Edited April 28, 2016 by Twin Turbo