C3 radiator fan

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Sl4yer
Posts: 849
Joined: 12 Apr 2003, 04:29
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C3 radiator fan

Unread post by Sl4yer »

As I said in the aircon topic, it didn't take long did it? :roll: I said that whatever replaced the ZX wouldn't be as reliable, and it's seeming that way so far...

Following a fault with the aircon, I examined a suggestion from Dom that the cooling fan is faulty. That appears to be the case - the Lexia actuation tests don't start it, and I've never seen it run with the aircon on. I'm a bit surprised that the aircon runs at all to be honest - I thought a standard requirement for the aircon to start is that the fan runs.

Does anyone have any experience with the fans on a C3? The command to start it is there, the Lexia even shows it to be running (there is a commanded parameter, and a speed parameter which slowed to 0% when the command was switched off, but the fan didn't move. :? ). Saying that, I didn't hear a motor spinning wildly when the fan was supposed to be engaged.

Does anyone know which the fan control relay is? The manual helpfully suggests that it's left to a Citroen dealer. (As an aside, I noticed the air intake hose was floating on it's own, not being connected to the corner that takes the air into the airbox. The clip on said corner was completely knackered, and the corner was resting on a pipe beneath where it should sit. I'm guessing this wouldn't have been disturbed since the last service, which was at a Citroen dealer...).

I don't imagine this will be a biggie to fix, and we got the car for a good price. I'm guessing it's a new relay or a new fan. Any advice / ideas appreciated, before it goes to my usual garage.

On a plus point, I'm delighted with the ability of my Chinese Lexia to look into a MUX car! :D

James
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Now Citroenless for the first time in 20 years
2008 Mazda RX-8 231
2007 Honda CR-V Auto
Sl4yer
Posts: 849
Joined: 12 Apr 2003, 04:29
x 2

Unread post by Sl4yer »

I now know which fuse is responsible for the cooling fan (maxi fuse 1) but can't get to it to check (it's on the side underneath the visible fuse panel). I don't fancy messing with the electrics on this, so it's off to the garage I think. :(

James
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Now Citroenless for the first time in 20 years
2008 Mazda RX-8 231
2007 Honda CR-V Auto
wheeler
Posts: 7898
Joined: 21 Sep 2002, 19:07
x 1045

Unread post by wheeler »

A garage to check a fuse ? are you mad ?
disconnect battery & undo 13mm nut on underbonnet fusebox & take the lead(s) off. There are then a 4 little tabs on the fusebox board that clip it into the box. Unclip them with a flatblade screwdriver & the box lifts out & you can then see the maxi fuses.
Sl4yer
Posts: 849
Joined: 12 Apr 2003, 04:29
x 2

Unread post by Sl4yer »

You're right wheeler. But I'm terrified (probably from reading on here :) ) of having electrical problems with the multiplexed C3. If I kill it, I'll never hear the end of it! :D Maybe I'm being paranoid - is it as simple as a 'normal' car, i.e. disconnect the battery and get stuck in? Nothing special about reconnecting?

Thanks,

James
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Now Citroenless for the first time in 20 years
2008 Mazda RX-8 231
2007 Honda CR-V Auto
wheeler
Posts: 7898
Joined: 21 Sep 2002, 19:07
x 1045

Unread post by wheeler »

Just take the key out the ignition & leave the ignition off for at least 3 minutes before disconecting the battery to allow the BSI to shut down. Dont open or close any doors or operate the plip or anything electrical on the car during this 3 minute period as this can 'wake' the BSI back up.
After reconnecting the battery wait 1 minute before trying to start the car or turning ignition on. You may have to re sync the plip afterwards, theres no radio code to worry about either.