passenger window
Discussion
Sounds like the window encoder. http://www.mytuscan.co.uk/problems_main.php#window...
When I had a similar issue I copied a post from PH, I'm not sure who wrote it but it may be helpful.
"Just for those who need or want to know.
Problem started with a window not lowering when opening the door. After arming and disarming the alarm it works fine but only the first time I opened the door. When closing the door the window goes up but not fully closing (sometimes it did). After about 10 times fizzling with the doorcontrollerbox (disconnect and connecting) everything seems ok.
But then, when I disconnected for maintenance reason the battery the problem came back and worse.
What stayed is that after disarming the alarm everything works as should, but only once. After that it's a mess. Pressing the door button (inside or outside) the window didn't lower at all or just one inch. Sometimes the window was lowered more then usual end after the was opened is was further lowered.
Resetting by disconnect the battery or doorcontrolbox didn't work anymore.
The alarm was also beeping three times when arming, but this occurred long before the window problem came up.
What was the cause of this : There is an encoder mounted at the windowmotor. The connector of the encoder (three pin) had one badly corroded pin. After fixing this all problems solved !
My explanation :
The encoder measures only the travel of the window, not the location. By measuring the travel the door controlbos assumes the position.
After disarming the alarm, the doorcontroller assumes that the window is closed fully. So by opening the door a fixed time the window is lowered. After that when closing the door the window goes up, but the doorcontroller doesn't get the right travel information and therefore doesn't know how long to set the relais. Because window-travel information after the first lowering is never correct the doorcontroller doesn't know at what height the window is. Wrong lowering/closing decisions are taken.
Obviously the doorcontroller knows that it isn't getting right travel information. It tells the alarm that things are not OK. The alarm tells me by beeping three times.
I hope is a story that can help someone and hope my explanation is correct."
When I had a similar issue I copied a post from PH, I'm not sure who wrote it but it may be helpful.
"Just for those who need or want to know.
Problem started with a window not lowering when opening the door. After arming and disarming the alarm it works fine but only the first time I opened the door. When closing the door the window goes up but not fully closing (sometimes it did). After about 10 times fizzling with the doorcontrollerbox (disconnect and connecting) everything seems ok.
But then, when I disconnected for maintenance reason the battery the problem came back and worse.
What stayed is that after disarming the alarm everything works as should, but only once. After that it's a mess. Pressing the door button (inside or outside) the window didn't lower at all or just one inch. Sometimes the window was lowered more then usual end after the was opened is was further lowered.
Resetting by disconnect the battery or doorcontrolbox didn't work anymore.
The alarm was also beeping three times when arming, but this occurred long before the window problem came up.
What was the cause of this : There is an encoder mounted at the windowmotor. The connector of the encoder (three pin) had one badly corroded pin. After fixing this all problems solved !
My explanation :
The encoder measures only the travel of the window, not the location. By measuring the travel the door controlbos assumes the position.
After disarming the alarm, the doorcontroller assumes that the window is closed fully. So by opening the door a fixed time the window is lowered. After that when closing the door the window goes up, but the doorcontroller doesn't get the right travel information and therefore doesn't know how long to set the relais. Because window-travel information after the first lowering is never correct the doorcontroller doesn't know at what height the window is. Wrong lowering/closing decisions are taken.
Obviously the doorcontroller knows that it isn't getting right travel information. It tells the alarm that things are not OK. The alarm tells me by beeping three times.
I hope is a story that can help someone and hope my explanation is correct."
Edited by S6 Devil on Saturday 10th April 00:34
I think I'm answering my own question here, but do you think a new PCB will sort my problem:
Drivers door always opens to half way when opening door. It then pauses and drops all the way as the door release opens.
On shutting the door, it returns to half way. Not a big deal on the way into the car, but annoying on the way out as I have to lean in and turn the knob for the window so that it closes when I engage the alarm. If I don't do this, it only stops 3/4 of the way up.
Have had a look at both ECUs and they seem fine.
Had the door cards off and cant see any corrasion, but given all the connectors a wee clean.
Have taken off the PCB, cleaned it and hairdryered it.
Nothing had made a difference.
Since the door/window behaves in exactly the same way whether the PCB is connected or not, is it safe to assume a new PCB will sort things?
Cheers
Drivers door always opens to half way when opening door. It then pauses and drops all the way as the door release opens.
On shutting the door, it returns to half way. Not a big deal on the way into the car, but annoying on the way out as I have to lean in and turn the knob for the window so that it closes when I engage the alarm. If I don't do this, it only stops 3/4 of the way up.
Have had a look at both ECUs and they seem fine.
Had the door cards off and cant see any corrasion, but given all the connectors a wee clean.
Have taken off the PCB, cleaned it and hairdryered it.
Nothing had made a difference.
Since the door/window behaves in exactly the same way whether the PCB is connected or not, is it safe to assume a new PCB will sort things?
Cheers
S6 Devil said:
dmacw said:
Which bit is the microswitch?
The microswitch is behind the silver panel in the body where the door clicks into.The little pcb in the door on the motor "counts the number of rotations of the motor" to allow the window to drop to the pre-requisite level to open the door - and then closes the window when the door is shut BY THE SAME NUMBER OF ROTATIONS OF THE MOTOR to close the window - as 'signalled' by the microswitch (which also does the interior light).
Therefore, the microswitch behind the stainless 'beauty panel' is an important part of the circuit. I had a bit of fiddle factor last year in Spa when, as I found out later, the small 'blade' on the microswitch started to foul on the lock mechanism. A little tweak with some long nose pliers sorted this. The microswitch is a bit of a swine to remove - its held in by 8BA (?) nuts & bolts and the nuts are sort of held captive by the silicone waterproofing.
As mentioned some contact cleaning usually sorts a lot of the window problems.
Nick
Gassing Station | Tuscan | Top of Page | What's New | My Stuff