coolant temp guage and fans not working

[TopDonkey]

I've finally got my chinese Actia interface working, and have the Peugeot Planet 2000 software installed and working properly too.

Trouble i have, is that the dash temp gauge doesnt register the coolant temperature, and the fans dont kick in when needed, I have already replaced the coolant temp sensor with a new one from the dealers and it made no difference.

I can see the coolant temperature in Peugeot Planet, and it climbs steadily, and goes down when i turn the heater on full blast, so i know its working properly, but the dash gauge doesnt display it.

I also can test the fans, slow speed or high speed will work from Peugeot Planet, but if i unplug the coolant temp sensors plug, the fan goes into high speed mode, so i know the fans (and probably the relays) work ok.

Can anyone suggest any other diagnostics, or tests i could do to try and pinpoint the problem with my car and get my coolant temp gauge and the fans working again ?

Thanks

[Doggy]

I've finally got my chinese Actia interface working, and have the Peugeot Planet 2000 software installed and working properly too.

Well done! - I'd love to know what that lot cost you / how much grief to get working.

Trouble i have, is that the dash temp gauge doesnt register the coolant temperature, and the fans dont kick in when needed, I have already replaced the coolant temp sensor with a new one from the dealers and it made no difference.

I can see the coolant temperature in Peugeot Planet, and it climbs steadily, and goes down when i turn the heater on full blast, so i know its working properly, but the dash gauge doesnt display it.

Might be worth a BSI reset if you haven't already tried it, otherwise sounds like a comms problem with the instruments - I guess it can't hurt to reseat the connectors for this and maybe the engine ECU.

I also cant test the fans, neither slow speed or high speed will work from Peugeot Planet, but if i unplug the coolant temp sensors plug, the fan goes into high speed mode, so i know the fans (and probably the relays) work ok.

Can anyone suggest any other diagnostics, or tests i could do to try and pinpoint the problem with my car and get my coolant temp gauge and the fans working again ?

Thanks

Are you able to test any of the actuators successfully?
Do the fans run if you turn on the a/c?

[TopDonkey]

Hi

It cost just over £300 in total for all the connectors and a working copy of the peogeot planet and actia, I installed it on my XP laptop as it wouldnt install on vista or windows 7, but it was a real pain to get it all installed and working, its a bodge to get the sotware running as it doesnt want to activate and the key that they supplied with it didnt work, but i managed to find one that did with a bit of googling


I assume you mean disconnect the battery and short the leads for 30 mins ? (i shorted them overnight), and when i plugged it all back in, the remote central locking had stopped working, but a bit of fiddling with it in and out of the locks and locking and unlocking got it all working, but it didnt help the fans at all

If i go into Peugeot Planet i can activate the slow speed and high speed fans manually, and they pulse on and off (i think they are meant to do this in actuator test mode), but the fans still wont come on by themselves

I've been through all 3 relays abd connectors, and buzzed them through, and cleaned the terminals till they were shiney, so i'm a bit stumped at the moment

[TopDonkey]

Next problem (and 1 i think might be causing all my troubles) is the following warning message i get when i first enter the diagnostics

Warning:
- Incorrect matching of the ECU (incorrect engine, system or vehicle).
- In spite of this incorrect matching of the ECU, do you wish to continue the diagnostics procedure?.

[TopDonkey]

I select the correct engine and ecu type when i go into Peugeot Planet which is an RHZ engine type, and an EDC15C2 ecu (confirmed by me) and i get the following message


Warning: ECU fitted to
NOUVELLE406 ECD15C2 RHZ

[poddack]

This all sounds a bit over the top for this kind of fault, have you checked the thermostat and made sure the system is bled properly? What 406 and engine do you have?

[poddack]

Sorry D9 HDi, i see.

[TopDonkey]

the system has been flushed and reverse flushed, bled with a 15" high bottle attacked to the header tank, and bled from all 3 bleed points, I've run it without a thermostat, with a brand new thermostat, and also with a good known working thermostat from my C5 HDI, so i am pretty confident it isnt an airlock or dodgey thermostat that is causing my problem

And yes, its a D9 RHZ HDI engine in it, the heater gets very hot, and i have managed to get the coolant up to 87 degrees and still no fans come on, and with the aircon on, the fan dont come on either.

I can force slow or high speed of the fan from Peugeot Planet, and if i disconnect the temperature sender, the fan goes to high speed with a warning on the dash (stop), so i am baffled as to why it wont run on its own

[poddack]

With a thermostat does the engine warm up quicker? I'm under the impression from previous posts that the fans come on half speed at about 95deg the full at 110deg. Anyone who can confirm? My 2.1td engine in this cold weather doesn't go above 70deg but I shall be swapping the thermostat soon.

[poddack]

I've just been looking on servicebox, would I be right in saying there is only 1 temp sensor? If so have you checked the two connectors on the back of the display clocks for dry joints?

[TopDonkey]

With a thermostat in, it warms up to 85 degrees in about 40 minutes, without the thermostat, i cant get it above 45 degrees no matter how long i idle it for, my thermostat is an 83 degree one, and it seems to open at 84 degrees when watching peugeot planet as there is a 2 degree temperature drop at 84 degrees which i assume is the thermostat opening

and yes, i do only have 1 temperature sensor on my engine, its above the gearbox on the side of the engine in a plastic manifold that bolts the the whole side of the engine, and i dont have a bitron either, i think the BSI or possibly the ECU controls the fans (or not in my case!)

And i havent checked the back of the clocks, i didnt think they would have had any effect on fan control as i know the BSI or ECU can see the coolant temperature as i can see it displayed in Peugeot Planet

[poddack]

Right, from this I'm "guessing" that you only have one fault, the temperature gauge on the dash. I'm sure the fan doesn't come on until 95deg. Please correct me if I'm wrong!

[TopDonkey]

If your right about the fans cutting in at 90 degrees, then it possible that they do work, but i cant get the engine that hot in this weather, so at the moment, yes, the only fault is that the temperature display doesnt work

I guess it time to pull the clocks out of the dash and have a fiddle about and see if i can get them working, its a pity Peugeot Planet doesnt have a needle test actuator in it, i could then see if the temp clock was actually working or not

[poddack]

LOL, faults with the dashboard clocks are quite common, if you trawl through this site, you'll see many mentions of speedo's and rev counters not working with a quick slap on the top sometime bringing them back to life, these are usually caused by dry joints on the two connectors at the back, these can also cause any other function of the clocks not to work depending on which need soldering. I have repaired a speedo fault on a Citroen Saxo by resoldering these connections. You could also try slapping the top of the dashboard when the engine is warm, you never know!

[TopDonkey]

Well you learn something new every day !!, i did search for temperature gauge problems, but it turned nothing up on here, so assumed the fault would be somewhere else

thanks, i will take the clocks out tomorrow morning and see if i can find the fault, i would do it tonight, but my wife needs the car to take her mum home just after midnight !