I have a couple of fault codes relating to an intermittent fault on both cooling fans - they cut in whenever they like. Sounds like a jet turbine warming up.
18080 - Coolant fan control 1
P1672-004- Open or short to ground, intermittent
18308 - Coolant fan control 2
P1900 - 004 - Open or short ground, intermittent
Any help appreciated. The indie reckons it could be a 10 mins or 10 hour job, so any pointers where to start looking first would be a great help.
Cheers
Help with fault codes
Re: Help with fault codes
Quick search brought up this thread, which may help
viewtopic.php?t=107031
Sent from mobile with fat fingers
viewtopic.php?t=107031
Sent from mobile with fat fingers
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Bradders911
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Re: Help with fault codes
Thanks TechNick. I should have thought to do a search first.TechNick wrote:Quick search brought up this thread, which may help
viewtopic.php?t=107031
Sent from mobile with fat fingers
Is there one control unit for both fans ? If not, then is it likely both ECM have died as both fans are coming up with the same fault in my case ?
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atledreier
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Re: Help with fault codes
Is the water temp reading fine? I had a faulty sensor that played havoc with my fans. Can't remember the fault code it threw, though. I made a thread for it a little while back.
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2003 RS6 Avant, Daytona grey
2012 Toyota GT86
2014 Toyota Prius Plus 7
2012 Toyota GT86
2014 Toyota Prius Plus 7
Re: Help with fault codes
If you clear them, do they come back? Could be old codes from a previous wire disconnection.
Do an output test to spin up the fans and see if they do.
If not, check the fuses behind the dash. They are big ones. I'd be surprised if you had an intermittent code if the fuses were gone, but it's something that needs to be eliminated.
Then log your temps (to the ECU and to the dash) to see if they are coherent.
Each fan has its own controller. One of them is integrated into the fan unit, the other is bolted under the chassis member. Someone posted a photo of the location recently.
Do an output test to spin up the fans and see if they do.
If not, check the fuses behind the dash. They are big ones. I'd be surprised if you had an intermittent code if the fuses were gone, but it's something that needs to be eliminated.
Then log your temps (to the ECU and to the dash) to see if they are coherent.
Each fan has its own controller. One of them is integrated into the fan unit, the other is bolted under the chassis member. Someone posted a photo of the location recently.
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."
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Bradders911
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Re: Help with fault codes
Water temp is fine.
I'll pass the other comments onto the garage, cheers guys.
I'll pass the other comments onto the garage, cheers guys.
Re: Help with fault codes
How do you know?Bradders911 wrote:Water temp is fine.
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."
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Bradders911
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Re: Help with fault codes
Fair point - I was going by the dash gauge.
Re: Help with fault codes
The dash uses a different coolant temp feed to the ECU (plus it's pinned to 90 unless there is a huge variation).
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."
Re: Help with fault codes
Which is a good point. So best practice - even the slightest deviation above 90, no matter how minor - stop IMMEDIATELY.
Shoppinit wrote:The dash uses a different coolant temp feed to the ECU (plus it's pinned to 90 unless there is a huge variation).
"not a professional engineer, mechanic and mechanist"
Re: Help with fault codes
MattV8 wrote:Which is a good point. So best practice - even the slightest deviation above 90, no matter how minor - stop IMMEDIATELY/or pull over in a safe place!
Shoppinit wrote:The dash uses a different coolant temp feed to the ECU (plus it's pinned to 90 unless there is a huge variation).
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Audi S3, S4 V8 avant.
Porsche Macan Turbo.
Gone but NEVER forgotten - C5 RS6 Misano red avant.
Now - Empty garage
If you don't know where you're going, any road will take you there!
Audi S3, S4 V8 avant.
Porsche Macan Turbo.
Gone but NEVER forgotten - C5 RS6 Misano red avant.
Now - Empty garage
If you don't know where you're going, any road will take you there!
Re: Help with fault codes
What was the outcome?
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."
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Bradders911
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- Joined: Sun Jun 29, 2014 12:54 pm
Re: Help with fault codes
Dunno I rejected the car......
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