Hi folks,
This is my first post, but I've been hanging around the forum for a few months, and it's been a great help in what has turned into a bit of a repair saga. So firstly, thanks to everyone who's come before and taken the trouble to share their info. I think I'm winning, but I'm stuck at the moment.
OK, here goes......
My mother has an '02 plate 1.4, and last October it started having a problem with the alarm going off on its own. As I live at the opposite end of the country to her, I advised her to take it to the local auto-electrical place, (not the dealership) to see if they could help. Short answer is that they couldn't, but they pulled the hazard fuse and the connector off the alarm sounder, and she was then able to drive the car.
I got to see the car in early November when I traveled down for her 80th Birthday party, by which time the remotes had stopped working. Having seen the relevant threads on this forum, I plugged in VCDS and scanned the CCU for faults. It was very intermittent - sometimes VCDS would see the module, but if you went to do anything with it it timed-out.
Thinking that a bit of a plug-wiggle might sort things out I pulled the CCU and re-installed, leading to a complete CCU failure
So now she had a car with no electric windows, mirrors, interior lights, fuel release, boot release etc. etc. (and a still-broken alarm). What a special Birthday present!!
Before traveling home the next day and leaving her completely stranded I rigged a piece of string to the emergency boot release and wedged a slice of wooden clothes peg in the filler flap to stop it locking so she could a least get to Tescos and back. I also pulled the CCU and got it straight in the post to Lau in Germany (what a nice guy). He fixed it and tested all the functions in his A2 before returning it to me.
Two weeks later and I have a fixed CCU back, which I send to my bother-in-law to plug back in for me (he's only 40 miles away from the car). He plugged it back in and was somewhat upset to find that it still did nothing, although he could scan it reliably. So we were moving forward albeit slowly.
Last weekend I bit the bullet and drove down to collect both Mother and the car, so it's on my Drive, and she's on my sofa (saying "is it fixed yet")!!
I found that Fuse 41 was blown. Restoring that fixed most things (boot, all 4 windows, interior lights, door mirrors), but not the alarm or the remotes (Lau coded his keys to the CCU to test so adaption would be required to sort that anyway). Biggest problem was with the fuel filler, pressing the button blew F41 again. Scanning the CCU shows no faults until the fuel button is pressed, which registers DTC 01357
Tank flap lock motor -V155 Short to positive, Short to earth.
To cut a long story short I've tried everything I can think of. I can fire the fuel flap solenoid manually (connect pins 11 and 3 of connector 1 of the CCU) so I don't think there is a fault in the harness between the CCU and the solenoid. I've beeped out the cabling to the switch and can't find a fault at that end either.
There are a couple of other odd goings-on which I'm not sure are related:
1)The rear-window locking switch on the driver door card is always illuminated unless it's pressed, and it doesn't latch down. Functionally this switch works - if you hold it down the rear windows work, if you don't they don't. Is this a broken switch or something else?
2)The alarm sounder has been re-connected and doesn't sound. Is this something to do with the battery backup unit which I can't find any real info on but have seen mentioned?
3)I can't seem to register the keys with the CCU - doing the adaption on channel 21 using VCDS I managed to get one of the keys registered on slot 3, but it still didn't unlock the car. Since then neither key can be detected when I do the adaption thing.
Final question for now - anyone know where I can buy cheap 10A fuses? I've gone through millions of the little beggars!!!!
Fingers crossed someone can help,
Blippy
This is my first post, but I've been hanging around the forum for a few months, and it's been a great help in what has turned into a bit of a repair saga. So firstly, thanks to everyone who's come before and taken the trouble to share their info. I think I'm winning, but I'm stuck at the moment.
OK, here goes......
My mother has an '02 plate 1.4, and last October it started having a problem with the alarm going off on its own. As I live at the opposite end of the country to her, I advised her to take it to the local auto-electrical place, (not the dealership) to see if they could help. Short answer is that they couldn't, but they pulled the hazard fuse and the connector off the alarm sounder, and she was then able to drive the car.
I got to see the car in early November when I traveled down for her 80th Birthday party, by which time the remotes had stopped working. Having seen the relevant threads on this forum, I plugged in VCDS and scanned the CCU for faults. It was very intermittent - sometimes VCDS would see the module, but if you went to do anything with it it timed-out.
Thinking that a bit of a plug-wiggle might sort things out I pulled the CCU and re-installed, leading to a complete CCU failure
So now she had a car with no electric windows, mirrors, interior lights, fuel release, boot release etc. etc. (and a still-broken alarm). What a special Birthday present!! Before traveling home the next day and leaving her completely stranded I rigged a piece of string to the emergency boot release and wedged a slice of wooden clothes peg in the filler flap to stop it locking so she could a least get to Tescos and back. I also pulled the CCU and got it straight in the post to Lau in Germany (what a nice guy). He fixed it and tested all the functions in his A2 before returning it to me.
Two weeks later and I have a fixed CCU back, which I send to my bother-in-law to plug back in for me (he's only 40 miles away from the car). He plugged it back in and was somewhat upset to find that it still did nothing, although he could scan it reliably. So we were moving forward albeit slowly.
Last weekend I bit the bullet and drove down to collect both Mother and the car, so it's on my Drive, and she's on my sofa (saying "is it fixed yet")!!
I found that Fuse 41 was blown. Restoring that fixed most things (boot, all 4 windows, interior lights, door mirrors), but not the alarm or the remotes (Lau coded his keys to the CCU to test so adaption would be required to sort that anyway). Biggest problem was with the fuel filler, pressing the button blew F41 again. Scanning the CCU shows no faults until the fuel button is pressed, which registers DTC 01357
Tank flap lock motor -V155 Short to positive, Short to earth.
To cut a long story short I've tried everything I can think of. I can fire the fuel flap solenoid manually (connect pins 11 and 3 of connector 1 of the CCU) so I don't think there is a fault in the harness between the CCU and the solenoid. I've beeped out the cabling to the switch and can't find a fault at that end either.
There are a couple of other odd goings-on which I'm not sure are related:
1)The rear-window locking switch on the driver door card is always illuminated unless it's pressed, and it doesn't latch down. Functionally this switch works - if you hold it down the rear windows work, if you don't they don't. Is this a broken switch or something else?
2)The alarm sounder has been re-connected and doesn't sound. Is this something to do with the battery backup unit which I can't find any real info on but have seen mentioned?
3)I can't seem to register the keys with the CCU - doing the adaption on channel 21 using VCDS I managed to get one of the keys registered on slot 3, but it still didn't unlock the car. Since then neither key can be detected when I do the adaption thing.
Final question for now - anyone know where I can buy cheap 10A fuses? I've gone through millions of the little beggars!!!!
Fingers crossed someone can help,
Blippy
