TRD3000GT Posted November 23, 2004 Share Posted November 23, 2004 OK. Its still broken. So far looked at and replaced...... Drivers door, closed electrical switch pack (windows, and lock switches) Looked at Dome ?? fuse in engine bay fuses and seems to be good... but the fact that it unlocks but does not lock would suggest it was not a fuse Alarm system. It just seems to be the following. There is NO problem with the unlock on the alarm, keyfob or the switch inside the car... But the lock has completely gone. I have to manually flip the switch inside or close the door with the key! Its a big pain in the ASS!! :angry: :angry: I think it could be the central locking motor ?? Anyone know where it is ? Or anyone got any other ideas. ? Quote Link to comment Share on other sites More sharing options...
Ian C Posted November 23, 2004 Share Posted November 23, 2004 Well, there has to be a circuit to lock it and one to unlock it. I'd say the one that locks it has gone. I'll have a look at circuit diagrams -Ian Quote Link to comment Share on other sites More sharing options...
AJI Posted November 23, 2004 Share Posted November 23, 2004 Have you tried your backup key fob to make sure it isn't a faulty fob your using? Otherwise it could well be a knackered lock motor.... assuming you can hear noises and it isn't doing its job. Quote Link to comment Share on other sites More sharing options...
Ian C Posted November 23, 2004 Share Posted November 23, 2004 Does your door lock switch work? The one by the window controls? Er, ignore, I re-read and found the "manually flip the switch" bit Er again, maybe that doesn't mean the "lock unlock all doors" switch, can you clarify please -Ian Quote Link to comment Share on other sites More sharing options...
TRD3000GT Posted November 23, 2004 Author Share Posted November 23, 2004 OK, I have 2 key fobs, and my toyota key has a remote lock, unlock . The unlock works on all of them but lock is a no go. The switch in the drivers door works for the unlock but not the lock. ( this is the uint I replaced at £ 85 !! and it did not resolve the problem ) Im comming to a loss, I hope its not too difficult to fix! If its the lock circut or motor, where do I find these units ? Quote Link to comment Share on other sites More sharing options...
Ian C Posted November 23, 2004 Share Posted November 23, 2004 So the only way to lock the doors is to manually flip the orange-marked flippy things located in the handle, and you have to do this for both doors, right? Not taking the piss, just being very clear on what does and doesn't work. The fob and the "lock all" button doesn't work. Does putting the key in the lock and turning it successfully lock the car? Quote Link to comment Share on other sites More sharing options...
TRD3000GT Posted November 23, 2004 Author Share Posted November 23, 2004 Originally posted by Ian C So the only way to lock the doors is to manually flip the orange-marked flippy things located in the handle, and you have to do this for both doors, right? Not taking the piss, just being very clear on what does and doesn't work. The fob and the "lock all" button doesn't work. Correct, But I can also lock it manually with the key from outside. Put in door turn... you get the idea Quote Link to comment Share on other sites More sharing options...
Ian C Posted November 23, 2004 Share Posted November 23, 2004 Hmm, well, the circuit diagram is a bit chocolate fireguard as it's for a US spec car and they seem to have a door lock switch for each door rather than one master for both doors at once. So, it's multimeter time for you I'd start at the lock-all switch. If you can suss out which pin does what, you should be able to compare the "unlock" circuit with the "lock" one, and I bet you get either no power fed or no ground switched in when you try and lock it. Follow that circuit to power or ground and you'll find a break in it somewhere. If both doors exhibit the same behaviour I'd say it's not the motors. -Ian Quote Link to comment Share on other sites More sharing options...
TRD3000GT Posted November 23, 2004 Author Share Posted November 23, 2004 Originally posted by Ian C Hmm, well, the circuit diagram is a bit chocolate fireguard as it's for a US spec car and they seem to have a door lock switch for each door rather than one master for both doors at once. So, it's multimeter time for you I'd start at the lock-all switch. If you can suss out which pin does what, you should be able to compare the "unlock" circuit with the "lock" one, and I bet you get either no power fed or no ground switched in when you try and lock it. Follow that circuit to power or ground and you'll find a break in it somewhere. If both doors exhibit the same behaviour I'd say it's not the motors. -Ian Thats a good point, Not the motors because both doors do it. I was going to trace every wire from the central locking switch in the drivers door to where they all end. Do you think that I would more than likely find a break there? Or could it possibly be the Relay for the motors that has blown up. If it is that... do you know where it is ? C.. Quote Link to comment Share on other sites More sharing options...
keron Posted November 23, 2004 Share Posted November 23, 2004 sounds like it is something to do with the alarm? is there not a way to reset the alarm system? this sort of thing happens on my range rover all the time! i have to reset the alarm to make the key fobs work again! Quote Link to comment Share on other sites More sharing options...
TRD3000GT Posted November 23, 2004 Author Share Posted November 23, 2004 nothing to do with the key fobs, as it does not work on the manual switch either BUT. I have had this problem before, so I diconnected the battery for 1/2 hour... re connected and it worked again. But Im sure its something else this time! C. Quote Link to comment Share on other sites More sharing options...
Ian C Posted November 23, 2004 Share Posted November 23, 2004 Originally posted by TRD3000GT Thats a good point, Not the motors because both doors do it. I was going to trace every wire from the central locking switch in the drivers door to where they all end. Do you think that I would more than likely find a break there? Or could it possibly be the Relay for the motors that has blown up. If it is that... do you know where it is ? C.. Well, according to the circuit diagram, there is a lock/unlock switch for the door key, which says to me that the key works the motor rather than it being mechanical. If it's mechanical, it narrows things down one way, if the key lock works the motor, it narrows things down in a different direction. Can you recall if it's mechanical or not? -Ian Quote Link to comment Share on other sites More sharing options...
TRD3000GT Posted November 23, 2004 Author Share Posted November 23, 2004 I have had the door panel off and there is a solid wire that locks and unlocks the doors. its like a bicycle brake, wire sheathed in plastic retainer. Not exactly sure what you mean by the key though. When I unlock the door via the remote both the manual door lock switches flip. But they wont go the other way Quote Link to comment Share on other sites More sharing options...
Alex Posted November 23, 2004 Share Posted November 23, 2004 Let me know if you want Ian to dissect my car to check voltages etc Quote Link to comment Share on other sites More sharing options...
TRD3000GT Posted November 23, 2004 Author Share Posted November 23, 2004 Dude, I really dont know what to do. Dont worry about disecting your car! I would not even know where to look!! I might just take it to JEMCA tmro. C. Was hoping to not have to spend more money on the problem but has really got under my skin!!! Quote Link to comment Share on other sites More sharing options...
Ian C Posted November 23, 2004 Share Posted November 23, 2004 What I mean is, right, is there are four mechanisms for locking/unlocking the door: 1. Key 2. Flippy thing 3. Lock/unlock all button 4. Remote plipper Now, 3 and 4 have gotta be an electronic switch that works the lock motors. 2, I think, however, is mechanical - your act of flipping it provides the power to physically lock/unlock the door, the motor is not used at all and it means you can lock/unlock from the inside with no power on. Question is, does 1 use the physical turning action or does it merely close a contact and the motor does the work? According to the circuit diagrams it's a switch, but I would have thought it would be mechanical so you can use the key if the battery is flat... The behaviour of the key points towards your next steps in diagnosis, it's not just a thought exercise -Ian Quote Link to comment Share on other sites More sharing options...
Matt Harwood Posted November 23, 2004 Share Posted November 23, 2004 Right, it won't be anything to do with the alarm. Full stop. According to my Autodata book, there is a Central Locking Control unit, located above the glovebox near side of the car. I've never seen one, but I have known a similar fault on another Supra and Mark simply rewired it for the customer. The Autodata book is a 1997 book, so it certainly won't cover VVTi's, how different this will be, I don't know... HTH Quote Link to comment Share on other sites More sharing options...
TRD3000GT Posted November 23, 2004 Author Share Posted November 23, 2004 Originally posted by Matt Harwood Right, it won't be anything to do with the alarm. Full stop. According to my Autodata book, there is a Central Locking Control unit, located above the glovebox near side of the car. I've never seen one, but I have known a similar fault on another Supra and Mark simply rewired it for the customer. The Autodata book is a 1997 book, so it certainly won't cover VVTi's, how different this will be, I don't know... HTH Ok, I guess its in the same place. If I was to look, How would I get in to the Central Locking Control Unit. Remember my car has airbags both sides! So Im not 100% how to get around the problem and yank the unit out! Im SO sure its a dodgy wire in the unit!! Quote Link to comment Share on other sites More sharing options...
Matt Harwood Posted November 23, 2004 Share Posted November 23, 2004 Bear in mind that I haven't actually seen one. I'd guess that if you start by removing the lower glovebox and side trim, then operate the locking to see if you can hear tiny clicks from nearby relays. (not the easiest thing to hear when the locking motors are operating). I doubt you'd need to remove the airbags to get to it. If/when you do find it, most relay units can be either unclipped or unscrewed. - My guess is dirty/pitted internal contacts on a relay. Quote Link to comment Share on other sites More sharing options...
TRD3000GT Posted November 24, 2004 Author Share Posted November 24, 2004 Ill get digging later on today! Thanks Matt. C. Quote Link to comment Share on other sites More sharing options...
Soop Dogg Posted November 24, 2004 Share Posted November 24, 2004 Only just spotted this thread. And there I was thinking "I bet it's the central locking ECU on the passenger side behind the dash." I have seen one of these and I think I might even have 2 of them lying around in my garage. I'll take a pic later tonight and hopefully get it posted for you to see. I may even have one still in situ on the back of a removed dashboard I have in the shed. From memory, it is almost up against the left side wall above the passenger footwell, alongside the glovebox. But it is attached to the back of the dashboard material, the big bit that goes the width of the car that the glovebox sits in. The Power steering ecu is in the same area I think. Quote Link to comment Share on other sites More sharing options...
TRD3000GT Posted November 24, 2004 Author Share Posted November 24, 2004 Originally posted by Soop Dogg Only just spotted this thread. And there I was thinking "I bet it's the central locking ECU on the passenger side behind the dash." I have seen one of these and I think I might even have 2 of them lying around in my garage. I'll take a pic later tonight and hopefully get it posted for you to see. I may even have one still in situ on the back of a removed dashboard I have in the shed. From memory, it is almost up against the left side wall above the passenger footwell, alongside the glovebox. But it is attached to the back of the dashboard material, the big bit that goes the width of the car that the glovebox sits in. The Power steering ecu is in the same area I think. Damn, sounds like Im gonna need my pick axe and a long light!! If I was to look at the front of the passenger dash how high up is it? Middle of the top glove box? I really do hope that this is where the problem is!! If you have some spare units, and that is actually what is causing the problem how much do you want for one of them? C. Quote Link to comment Share on other sites More sharing options...
Soop Dogg Posted November 24, 2004 Share Posted November 24, 2004 Right, here we are, Chris. (Excuse all the crap in the shed at the back of my garage!!) This one is from the other side of the glovebox. (If you can imagine that!) The part you want is the blue box with the orange connector. As you can see, it is just by the air vent nearest the passenger door. It's pretty much in line with the top of the lower glovebox. This is another angle of the same part in situ on the back of the dash: They can also come in various assorted colours. Here's one (removed) in a nice shade of red! Hope this helps. Brian. Quote Link to comment Share on other sites More sharing options...
Soop Dogg Posted November 24, 2004 Share Posted November 24, 2004 How much crap do I hang onto that 'might come in handy one day'??? Quote Link to comment Share on other sites More sharing options...
TRD3000GT Posted November 25, 2004 Author Share Posted November 25, 2004 Brian, Thanks SO much for doing that, I did have a small attempt last night at finding this unit but failed. I will have another look today after work! Looks to me like you have two spares as well? How much do you want for one of them>? if that is actually my problem. P.S. do you know where the motor for the central locking is ? , I take it that this is just the control box but not the thing that actually phisically moves the door locks open and closed Chris. Quote Link to comment Share on other sites More sharing options...
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