FBH again - seems to be a different problem

DaPol · 21st December 2016, 21:13

Fitted an FBH sourced from eBay the other day to my car, along with a 2nd hand pump.

Manually primed the pump using a flying live lead and got diesel coming out of the under bonnet hose, connected the pump loom and the under bonnet loom.

The under bonnet loom is a *little* too tight - took some "enthusiastic encouragement" to get it to mate with the multi-way connector on the top of the heater itself. The 2 pin connector just goes straight on.

Problem I'm having is that the heater seems to never actually come on - had 4C outside tonight and tried, and the fan on it was drawing a very little air in, but not much, and the flue pipe wasn't even getting warm.

I've put the earth to pin 3, and the fan comes on full blast, will run for about 5 minutes, take a 30 second break and then go back to running full blast. At no point does it get hot.

I downloaded a copy of Webasto Thermo Test, connected my frigged-for-TOAF OBD cable, and told it to look at COM6 and a Rover Thermotop C/Z - lots of timeouts, no communication. Then tried the Webasto module in TOAF, which could see that the heater was there, but no more - no actual diagnostics.

I'd have thought a dead board, but reading the many previous threads, the behaviour with pin 3 earthed would seem to say that it's running as it should.

The car's a 2004 Contemporary CDTI 135 if that makes any odds.

Anybody got any idea, or have I actually already read what it would be and misunderstood the fault mode from a previous article?

Thanks

Paul

FrenchMike · 22nd December 2016, 06:55

Quote:

Originally Posted by DaPol

Fitted an FBH sourced from eBay the other day to my car, along with a 2nd hand pump.

Manually primed the pump using a flying live lead and got diesel coming out of the under bonnet hose, connected the pump loom and the under bonnet loom.

The under bonnet loom is a *little* too tight - took some "enthusiastic encouragement" to get it to mate with the multi-way connector on the top of the heater itself. The 2 pin connector just goes straight on.

Problem I'm having is that the heater seems to never actually come on - had 4C outside tonight and tried, and the fan on it was drawing a very little air in, but not much, and the flue pipe wasn't even getting warm.

I've put the earth to pin 3, and the fan comes on full blast, will run for about 5 minutes, take a 30 second break and then go back to running full blast. At no point does it get hot.

I downloaded a copy of Webasto Thermo Test, connected my frigged-for-TOAF OBD cable, and told it to look at COM6 and a Rover Thermotop C/Z - lots of timeouts, no communication. Then tried the Webasto module in TOAF, which could see that the heater was there, but no more - no actual diagnostics.

I'd have thought a dead board, but reading the many previous threads, the behaviour with pin 3 earthed would seem to say that it's running as it should.

The car's a 2004 Contemporary CDTI 135 if that makes any odds.

Anybody got any idea, or have I actually already read what it would be and misunderstood the fault mode from a previous article?

Thanks

Paul

Hi Paul ,what my diagnostics say ?

http://www.the75andztclub.co.uk/foru...BH+diagnostics

FBH season

Mike

DaPol · 22nd December 2016, 18:41

Quote:

Originally Posted by FrenchMike

Hi Paul ,what my diagnostics say ?

http://www.the75andztclub.co.uk/foru...BH+diagnostics

FBH season

Mike

Stops at around 2m dead, pauses 4 seconds, restarts - not seeing anything like that in your list, closest being "All OK".

FrenchMike · 22nd December 2016, 19:00

Quote:

Originally Posted by DaPol

Stops at around 2m dead, pauses 4 seconds, restarts - not seeing anything like that in your list, closest being "All OK".

Something like that ? (fan is the green line)

DaPol · 22nd December 2016, 19:03

Quote:

Originally Posted by FrenchMike

Something like that ? (fan is the green line)

Pretty much exactly, yes.

FrenchMike · 22nd December 2016, 19:08

Quote:

Originally Posted by DaPol

Pretty much exactly, yes.

So your glowplug resistor is too high (must be less than 0.40 ohms)

DaPol · 22nd December 2016, 19:30

Quote:

Originally Posted by FrenchMike

So your glowplug resistor is too high (must be less than 0.40 ohms)

OK - so I need to replace the glow plug.

Excellent!

Thank you Mike!

daznkel · 22nd December 2016, 22:55

"Tis the season Mike gets inundated, Tra la la la la lal la la la la"!

21st December 2016, 21:13	#1
DaPol Loves to post 75 CDTi Saloon Join Date: Jun 2010 Location: Bolton Posts: 302 Thanks: 47 Thanked 77 Times in 49 Posts	FBH again - seems to be a different problem Fitted an FBH sourced from eBay the other day to my car, along with a 2nd hand pump. Manually primed the pump using a flying live lead and got diesel coming out of the under bonnet hose, connected the pump loom and the under bonnet loom. The under bonnet loom is a little too tight - took some "enthusiastic encouragement" to get it to mate with the multi-way connector on the top of the heater itself. The 2 pin connector just goes straight on. Problem I'm having is that the heater seems to never actually come on - had 4C outside tonight and tried, and the fan on it was drawing a very little air in, but not much, and the flue pipe wasn't even getting warm. I've put the earth to pin 3, and the fan comes on full blast, will run for about 5 minutes, take a 30 second break and then go back to running full blast. At no point does it get hot. I downloaded a copy of Webasto Thermo Test, connected my frigged-for-TOAF OBD cable, and told it to look at COM6 and a Rover Thermotop C/Z - lots of timeouts, no communication. Then tried the Webasto module in TOAF, which could see that the heater was there, but no more - no actual diagnostics. I'd have thought a dead board, but reading the many previous threads, the behaviour with pin 3 earthed would seem to say that it's running as it should. The car's a 2004 Contemporary CDTI 135 if that makes any odds. Anybody got any idea, or have I actually already read what it would be and misunderstood the fault mode from a previous article? Thanks Paul

22nd December 2016, 22:55	#8
daznkel Posted a thing or two 04 MG ZT+ 190 XPG & 99 (T) Dealer Launch 75 V6 Connie Auto Join Date: Oct 2012 Location: Plymouth Posts: 1,080 Thanks: 615 Thanked 456 Times in 309 Posts	"Tis the season Mike gets inundated, Tra la la la la lal la la la la"! __________________ Click HERE To Be Added To The South West Members Location Map Upgrades/Mods so far: Custom Angel Eye DRL's, MG7 Rear lights, Custom Door Cards, MGR Plates, Red Alcantara Seats, Black Oak Dash, Powerflex bushes, Plenum Spy Mod, Rear Light Seals, 5000K HID Kit, Navall 3 DD, Blue LED Conversion, Custom badges, Union badges, Flip key. Working on more! [SIGPIC][/SIGPIC]