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Old 29-09-17, 01:10 PM   #1
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Default Pre/Post Heating Relay

Hi,

Whilst trying to get cruise control working on my 307 I connected to planet and did a global test. It came up with a fault saying "Permanent Fault Pre/Post Heating Relay Circuit Relay Stuck".
The car runs fine and starts easy. I am in South of France but will be taking the car up into the Alps for the winter so do not want starting problems.
My unit is a G Cartier relay. Is there any way of unsticking the relay or will I just need to get a replacement.
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Old 29-09-17, 01:31 PM   #2
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Have you tried clearing it to see if it comes back? Might be an old code.
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Old 29-09-17, 04:10 PM   #3
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Be wary of glow plug messages as they seem to be phantom ones on some cars. I have one on my 1.4HDi but there is nothing wrong with the actual system.
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Old 30-09-17, 07:28 AM   #4
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I have cleared the code but have not driven the car since. So I will give it a couple of days and then check it again.
Is it possible to dismantle the relay or is it a sealed unit?
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Old 30-09-17, 08:32 AM   #5
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Doesn't the 1.4 hdi suffer from the wiring loom rubbing under the battery tray?
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Old 30-09-17, 08:35 AM   #6
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I agree with madbadandold. Nearly every car I've done a diagnostic on has shown this error and some of those have been petrol engines. One member had this error on his 407 but when it was diagnosed at a Peugeot Dealer that particular error was not showing. Seems like some clones are prone give this as a false error.
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Old 30-09-17, 12:51 PM   #7
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I have given the car a run and then put it on planet again. The fault code is back. I have tried to do a test on it through planet and I can hear the relay operating during the test but then planet locks up my laptop and will not let me exit that part of planet. The only way out is to do a restart of the computer.
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Old 30-09-17, 02:29 PM   #8
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Check the resistance of each plug to ensure they are working. You will not get the warning symbol on until it gets very cold as a normal anyway but they are sealed but if the engine starts ok in the cold forget it.
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Old 05-10-17, 07:42 AM   #9
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It starts fine but in the winter when the temperature can drop into the minus 20s it might be a different story.
The coil symbol comes on when I turn on the ignition but goes out immediately.
Last winter it came on and stayed on for a few seconds before gong out as I would expect and the car started fine.
I think I will leave it and see how I get on this winter. However, I will take my booster starter with me.
I will also look in the breakers for a spare relay just in case.
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Old 05-10-17, 03:13 PM   #10
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It takes a few minutes to check the resistance of each glow plug . Just disconnect the plug from the relay and stick the meter on each cable and earth in turn. Each one should show some resistance. If any show no resistance then that plug is u/s. If I was you I would be prepared to find a couple or more dead. But so saying unless it is really cold, in the big minuses the HDI engines will cope without them.
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