2002 Diesel Tourer - air pump won't turn off

2ndmouse · 24th July 2014, 09:44

I'm an under-the-bonnet ignoramouse, so please allow for this.

I have been driving my Tourer Club SE for 12 years and have had very few problems.

Yesterday, I jumped into my car only to find that the battery was completely flat - not a hint of power coming from it.

In normal circumstances, when I turn off the ignition, some kind of air pump cooling motor continues to run for about 10 mins, then automatically turns itself off.

Since yesterday, this motor refuses to turn itself off - this is what caused the flat battery as I didn't notice that the thing was still running.

I have since disconnected this pump and had the battery charged, and now the problem has disappeared.

I'm wondering how crucial the air pump is as the car seems to run fine without it.

The flat battery has also caused (i think) my climate control settings to show an error (Er) instead of showing a temperature. Is there an easy way to reset this?

Sorry if I haven't given enough detail. Please reprimand me accordingly.

Regards to all

DMGRS · 24th July 2014, 09:50

It could be your FBH - it's a small unit in front of your battery, and when the PCB (circuit board) has issues, they can run on or cause other problems.

If it's this, you're OK to leave it unplugged.

spyder · 24th July 2014, 10:26

The FBH (air pump thingy ) is controlled by the outside temperature sensor, it is fitted behind the lower grill. If the FBH thinks that the temperature is below 5 degrees it will attempt to start.

DMGRS · 24th July 2014, 10:33

Quote:

Originally Posted by spyder

The FBH (air pump thingy ) is controlled by the outside temperature sensor, it is fitted behind the lower grill. If the FBH thinks that the temperature is below 5 degrees it will attempt to start.

It will, but it shouldn't run on indefinitely - after a couple of minutes at most it should shut down unless the engine is on or it's commanded by a timer.
Sounds like (if it is the FBH) it's goosed.

berkshirelad · 24th July 2014, 12:52

Hang on guys, are we sure this isn't a fan problem (and a bit more likely..)

DMGRS · 24th July 2014, 13:55

Quote:

Originally Posted by berkshirelad

Hang on guys, are we sure this isn't a fan problem (and a bit more likely..)

We don't know, but disconnecting the fan is a bit of a faff - much easier to unplug the FBH.

2ndmouse · 24th July 2014, 20:47

Thanks for all the replies/suggestions guys

I've left the air pump disconnected and the car is running fine - presumably there's a thermostat somewhere that switches the pump off. Maybe that (if it exists) would be easy to replace????

Any ideas re my 2nd question regarding the climate control error? Couple more clues - the rear window heating switch is not working, the switch for internal circulation is also not working. Lastly, the indicator lights no longer flash when I lock the car.

Any ideas?

Snagger · 24th July 2014, 21:12

Have you removed both the plugs as shown in post no 2?

one two wire, one six wire.

This is assuming you have a FBH of course.

The faulty PCB in the FBH itself can be the cause of some, and more, of the errors you are telling us of, as it is linked to the car wiring loom K-BUS circuit , that a lot of other components share.

You can also remove fuse 8 from the underbonnet fuse box too, which is for the FBH also.

Snagger.

COLVERT · 24th July 2014, 21:17

Quote:

Originally Posted by 2ndmouse

Thanks for all the replies/suggestions guys

I've left the air pump disconnected and the car is running fine - presumably there's a thermostat somewhere that switches the pump off. Maybe that (if it exists) would be easy to replace????

Any ideas re my 2nd question regarding the climate control error? Couple more clues - the rear window heating switch is not working, the switch for internal circulation is also not working. Lastly, the indicator lights no longer flash when I lock the car.

Any ideas?

A flat battery can upset some of the items in the ECU. Try a battery reset.

Disconnect the negative terminal for about half an hour or so. This will often reset all the items you are having problems with.

2ndmouse · 25th July 2014, 08:14

Quote:

Originally Posted by COLVERT

A flat battery can upset some of the items in the ECU. Try a battery reset.

Disconnect the negative terminal for about half an hour or so. This will often reset all the items you are having problems with.

Hi - are there any adverse effects if I do a battery reset?

Regards

24th July 2014, 09:44	#1
2ndmouse Regular poster Rover 75 Tourer Club SE Diesel 2002 Join Date: Jul 2014 Location: Ashford, Surrey Posts: 51 Thanks: 7 Thanked 3 Times in 3 Posts	2002 Diesel Tourer - air pump won't turn off I'm an under-the-bonnet ignoramouse, so please allow for this. I have been driving my Tourer Club SE for 12 years and have had very few problems. Yesterday, I jumped into my car only to find that the battery was completely flat - not a hint of power coming from it. In normal circumstances, when I turn off the ignition, some kind of air pump cooling motor continues to run for about 10 mins, then automatically turns itself off. Since yesterday, this motor refuses to turn itself off - this is what caused the flat battery as I didn't notice that the thing was still running. I have since disconnected this pump and had the battery charged, and now the problem has disappeared. I'm wondering how crucial the air pump is as the car seems to run fine without it. The flat battery has also caused (i think) my climate control settings to show an error (Er) instead of showing a temperature. Is there an easy way to reset this? Sorry if I haven't given enough detail. Please reprimand me accordingly. Regards to all

24th July 2014, 09:50	#2
DMGRS Discount MG Rover Spares Rover 75 CDTi, 2x MG ZS180 Join Date: Jun 2011 Location: Hythe, Southampton Posts: 11,320 Thanks: 456 Thanked 3,377 Times in 2,027 Posts	It could be your FBH - it's a small unit in front of your battery, and when the PCB (circuit board) has issues, they can run on or cause other problems. If it's this, you're OK to leave it unplugged. __________________ Your trusted MG Rover specialist! Tel: 02380 001133 / Email: [email protected] We now have a 'chat' function on our site for even quicker replies. Give it a try! Remember - discount code FORUM5 for 5% off

24th July 2014, 10:26	#3
spyder This is my second home 75 CDT Auto Tourer , Rover 45 , Astra, Zaffira, Chev Captiva Join Date: Mar 2011 Location: Wilts Posts: 3,342 Thanks: 203 Thanked 436 Times in 360 Posts	The FBH (air pump thingy ) is controlled by the outside temperature sensor, it is fitted behind the lower grill. If the FBH thinks that the temperature is below 5 degrees it will attempt to start. __________________ Chrome skull caps, EGR cleaned (original housing), Mondeo lower mounting, 12V outlets in the armrest and tourer boot, cat fixed, working FBH, Lidl plenum covers, DD with reverse camera.New speakesr/Tweeters with MDF rings. wood dash, Memory leather seats, wooden finished steering and handbrake, Xenon headlights.

24th July 2014, 21:12	#8
Snagger Gets stuck in ROVER 75 CDT CLUB SE 02 Join Date: Aug 2009 Location: Kent Posts: 658 Thanks: 30 Thanked 141 Times in 87 Posts	Have you removed both the plugs as shown in post no 2? one two wire, one six wire. This is assuming you have a FBH of course. The faulty PCB in the FBH itself can be the cause of some, and more, of the errors you are telling us of, as it is linked to the car wiring loom K-BUS circuit , that a lot of other components share. You can also remove fuse 8 from the underbonnet fuse box too, which is for the FBH also. Snagger. __________________ How to remove CDT alternator from top & side :- http://www.the75andztclub.co.uk/foru...d.php?t=199608 Battery charge light problems on a diesel ? http://www.the75andztclub.co.uk/foru...3&postcount=64 Diesel charging FBH voltage supply diagram http://www.the75andztclub.co.uk/foru...ght=cdt+charge How to identify voltage regulator type diesel http://www.the75andztclub.co.uk/foru...56&postcount=3

24th July 2014, 12:52	#5
berkshirelad Gets stuck in Rover 75 Tourer Connoisseur SE Join Date: Jan 2012 Location: Newbury Posts: 836 Thanks: 9 Thanked 101 Times in 91 Posts	Hang on guys, are we sure this isn't a fan problem (and a bit more likely..)

24th July 2014, 20:47	#7
2ndmouse Regular poster Rover 75 Tourer Club SE Diesel 2002 Join Date: Jul 2014 Location: Ashford, Surrey Posts: 51 Thanks: 7 Thanked 3 Times in 3 Posts	Thanks for all the replies/suggestions guys I've left the air pump disconnected and the car is running fine - presumably there's a thermostat somewhere that switches the pump off. Maybe that (if it exists) would be easy to replace???? Any ideas re my 2nd question regarding the climate control error? Couple more clues - the rear window heating switch is not working, the switch for internal circulation is also not working. Lastly, the indicator lights no longer flash when I lock the car. Any ideas?