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This is a walk through guide on retro fitting the OE keyless entry system which is for the 2001-2005 MX5's and this is aimed at the 1.6 and basic version 1.8's. The reason for this: it is easier to fit the OE system rather than an aftermarket system off the bay of E. This is because from 1989 - 1997, MK 1's and the MK 2's from 1998- 2001 use a rod system in the door for the push and pull while the the MK 2 from 2001-2005 use a cable system so aftermarket units are more difficult to fit, but we may cover that at a later stage.
Now there are two systems, VISTEON and NALDEC with the fobs also that match and as far as we are aware, they are compatible with each other. The first part of the guide is about installing the cab system for the door locks to work while the second part is wiring in the boot release( watch this space).
***Double clicking on the images will make them larger for viewing, wiring diagrams also have a PDF download***
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So you will need..
For getting the door locks working..
1 x OE keyless entry box
1 x OE keyless entry box power plug and a bit of loom
1 x OE keyless entry fob( more if required and programmed in)
1 x 10 mm nut
For getting the rear boot release working..
1 x length of single wire to run from the boot to the dash
1 x length of wire from the electric aerial plug
1 x B110 relay
1 x B110 relay socket with loom
1 x OE boot latch with a ad plug and a bit of loom
Tools needed/recommended...
1 x roll of PVC electrical tape
1 x soldering iron and solder
1 x wire strippers
1 x crimping pliers
1 x crimping earth connection
1 x 1/4 drive ratchet,extension and 10 mm socket
1 x volt tester
1 x wire feeding rod
1 x phillps driver
1 x torx bit number T35
Selection of solder joints and heat source...
So the first thing we need to do is acquire the bits. You should be prepared for a bit of a hunt around; in particular, we do not like cutting plugs and loom if I can avoid it and in the end, Autolink MX5, Callum Bishell and Harry Weare helped us with the bits needed to do this guide. We did contact Prestige Spares UK who just deal with the MK 2's and that became a total faf and a waste of time and let down(sorry John),also thank you to john and Steve for their time in finalizing the guide for everyone to use.
The unit sent to us was a NALDEC unit along with NALDEC fob and to be honest it is a very easy simple mod to install and took 20-30 minutes to have it working. When the unit arrived, the plug and loom were too short so the first thing to do was to extend the wires ready for fitting, then try to work out the wiring combination, which was easier said than done, but once figured out and a diagram was penned off, it was Thunderbirds Are Go..
Unit, plug, loom( after extending) and fob...
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Remove the glove box by opening and pulling on the right side to pop the holding hinge clip, once popped push over to the left and lift free and out of the way...
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Look for the large loom plug and socket, we will be connecting into the left side so releasing off the bracket and splitting it helps with the tight area to work in...
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Get the wire strippers, soldering iron ,solder and PVC tape, and the new plug and loom for the control box,you will also need the crimpers and earth crimp connector strip the wires in the centres the expose the inner core wires to twist the new plug wires to ,so that they can be soldered to solid on the main loom one at a time , solder in and cover with PVC tape, which follows as such...
The Blue with Red chaser wire from the new plug and loom goes to the Orange wire on the main loom,
The White with Red chaser wire from the new plug and loom goes to the White with Red chaser wire on the main loom,
The Black with Yellow chaser wire from the new plug and loom ,goes to the Black with Yellow chaser wire on the main loom,
The Purple wire from the new plug and loom ,goes to the Purple wire on the main loom,
The Black wire gets a crimped on earth connection to be bolted in place with the control box bracket,
The Red with White Chaser wire from the new plug an loom does not need to be connected as it is for the boot latch signal( more on that later)
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Keyless1.pdf- (56.17 KiB) Downloaded 1 time
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Once everything is soldered into place, ,use the PVC tape and wrap it all up nice and neat as this is now a fixed permanent fixture. Get your black wire with the earth crimped on connection and get your control box , 10 mm nut 1/4 drive ratchet, extension 10 mm socket and align the bracket on the fixing stud, slide the earth connector on and spin the 10mm nut on and tighten up with the ratchet to secure solid in place...
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Push your new plug into the control box , and you should hear the relay engage behind the dash,if the fob was not from the same MX as the unit then you will need to go through the fob pairing procedure below.
And believe it or not, thats it, its in. Tidy up the new loom piece, tape up the rear boot lock signal wire for possible use at a later date - if going down that route. Put the glove box back in and enjoy your keyless entry with the OE fob looking all original...
click on the video below....
https://www.youtube.com/watch?v=Z1PfBPA6SVU
2001 - 2005 Mazda MX-5, Roadster, Miata Remote Programming Instructions for the 1.6 and 1.8 ....
Open the driver's door and leave it open.
Lock and Unlock the driver's door using the power door switch on the door.
Insert the key into the ignition.
Turn key to ON then OFF position. Do this 3 times in 10 seconds. Leave the key in the ignition in the LOCK (off) position.
Close and open the driver's door 3 times leaving the door open.
Vehicle will respond by locking and unlocking door locks once.
Press any button on the remote two times. Vehicle will respond by locking and unlocking door locks once.
For additional remotes repeat step 7 now for up to 3 remotes total.
Remove the key from the ignition and the vehicle will respond by cycling locks automatically. Get out of the car with keys and test remote(s).
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