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The mkiv Supra Owners Club

part 2 of the central locking shenanigans


ulysees

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OK so some of you may know my locking stopped working.

keron at extreme performance today sorted me out with the blue locking control box that's behind the glove box,

so we plugged it in and bingo the car locked from the fob,

i was so chuffed, until i pressed it again and nothing happened:wtf:

 

so she locks now but wont unlock, any ideas?

i have an auto watch alarm/immobiliser fitted which could be the issue, I'm looking at that tomorrow,,,, not sure what I'm looking for though:search:

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this is the new blue locking control box keron gave me.

box.jpg

Now the weird thing is if i plug in the blue box, it locks but wont unlock.

so i lock it, unplug it, then plug the red (original) box back in and as it makes contact the doors unlock, but wont lock or unlock after that, i have to put the blue box back for me to lock it again.

im god damn confused.

someone please help

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A further thought on this, I assume each time you swap the boxes over you are opening and shutting the door before trying the locking system ? If so, just a thought, maybe the loom where it goes from the door into the pillar has a broken / shorted wire ?

 

I had a celica once and when I used to open and shut the drivers door the central locking would click on and off as I opened and shut the door, also the pop up headlights used to go up and down on thier own, I know its in a big rubber boot to protect the cables but you never know, specially if you have upgraded speakers where someone has stuffed bigger speaker cables through the boot either using a bit of mig welding wire or something to push through first to pull the speaker wires through and caught another cable with the sharp end.

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A further thought on this, I assume each time you swap the boxes over you are opening and shutting the door before trying the locking system ? If so, just a thought, maybe the loom where it goes from the door into the pillar has a broken / shorted wire ?

 

I had a celica once and when I used to open and shut the drivers door the central locking would click on and off as I opened and shut the door, also the pop up headlights used to go up and down on thier own, I know its in a big rubber boot to protect the cables but you never know, specially if you have upgraded speakers where someone has stuffed bigger speaker cables through the boot either using a bit of mig welding wire or something to push through first to pull the speaker wires through and caught another cable with the sharp end.

Yeah maybe, il take a look at the wires there cheers.

The speekers are standard though but the wires could be broken

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I didnt mean the speaker wires were broken and thats whats causing the problem, more that in the boot that takes all the cables from the door into the pillar might have a broken / shorted wire in.

If you take the door card off and look at the locking solenoid and see if one of the wires from that is the same colour as the one that is melted it might be shorting out somewhere, possibly in that rubber boot.

If the picture you have on here showing the melted wire is in the drivers footwell I'd think you will find that the door wiring probably plugs into that somewhere, to take the door off you would have to unplug the harness in the footwell and pull all the wires through the pillar, so if the door solenoid wire is the same colour as the melted one thats the first place i'd look

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i am having the same problem at the minute but the car wont lock but will unlock. i have replaced the red control unit but have found that the problem still occurs. i think that the wire carrying the locking current is at fault. does anyone know what the 6 wires are from wez's picture, im looking for the wire that controls locking?????

apologies for the slight hijack

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I'm going to avoid going to Mr T at all costs, they tend to be completely clueless. I checked all of my fuses both fuse boxes today, they are all fine. I'm getting fed up, I may have to buy that black aero top in the classified section..... The misses already says no to that, so I'm back to fixing the damn door locks!!!!! Arrrrghhhhhh!

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Sod it i booked a sparky to come and sort it, hes coming to my wok place on Thursday £30 call out charge and £20 per hour, he said he wont be any longer than 2 hrs so max bill of £70. Sounds a bit confident don't ya think? cocky git lol

 

I hope that's all it costs you, good luck mate, keep us posted.

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Right, it was working after the sparky looked at it, came out of work tonight and wouldnt unlock again for f**ks sake so i rang the sparky and hes coming tuesday to have another look, i said im not paying any more and he said ok just pay his deisel (£10).

 

When he looked on thursday he said that he was looking for 2 minutes and it started working on its own wich is strange cus its just not worked at all for me for the last 10 ish days, so he only had a 2 minute window to find the problem wich he thinks is in the drivers door so he just re wired it. he took a wire from a blue connector in drivers footwell across to the blue box behind the glove box.

He did say that to unlock the car it needs a short jab of an earth and mine has a constant earth, could that be becuse of the burnt wire????:banghead:

 

HELLLLP MEEEEE PLEEEEASE !!!!!!!!

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So he didn't do anything with the burnt wire ? They don't just melt for no reason, if you are still driving it like that and hes run a new wire to trigger the door lock and not spent any time trying to see why the other ones melted in the first place I would be a bit worried that the car would catch fire

 

If hes saying he thinks the problem is in the door the first thing I would do, as I suggested before, is take the trim off, find the solenoid and see if one of the wires from that is the same colour as the one that's melted, looks to me that one of the wires on the contol box looks the same colour as the one thats melted as well.

 

If it is I would then trace this wire back from where its to where it goes into the door by unplugging the drivers door loom from where it plugs in near to where the wire is melted I would think, if that picture on here is in the drivers footwell, get the boot off where it goes between the door and the pillar and have a look for a broken or shorted wire in there or anywhere else in the door.

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