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roel

Member Since: 08 Aug 2009
Location: Lelystad
Posts: 2039

hand brake / brake fluid level warning light stays on.

Dear all,

2003 90 td5 Farmers runaround.

I have s atrange problem, normally when something breaks it doesn't work, but my warning light stays on while it should be off.
First off all I was amazed that I found elektronics behind the dash:

Click image to enlarge

Looking at my Rave disc I have to admit it only goes including the 2002 modell But I thought that would be the same as the other one is the 1999 model. At the electric diagram it shows the instrument light getting the power from connector C0230 pin 1 and the sensors are connected to C0230 pin 14. Pin 13 and 9 are connected to each other and internally pin 13 and 14 are connected and there is a resistor between the power part pin 1 and pin 9.

So I start measuring 14 has 6 V when engine is running.

I think the switches on the Hand Brake and the fluidlevel are OK as the resistences will drop to 0 ohm when the hadbrake is pulled or the fluid level sensor is pulled above the container.
When everything is connected the voltage also drops to 0V when the hand brake lever is pulled etc.

Is the electronics part broken?

Another thing what confuses me is that when I pull the C0230 plug off completely the handbrake and fluid level light is on and also the ABS light is on, while these should only be powered by C0230 pin.

Click image to enlarge

Does anybody have an idea????? Roel

1984 90 2.5 na Diesel - RR V8 (1994-2001)
1997 Camel Trophy Discovery 300TDI (2001-2009)
2005 G4 Discovery III 4.4 V8 (2008-2018) It's gone but it still hurts.
2003 90 Td5 (2009-now)

3rd Aug 2016 4:19pm

4RF RDS

Member Since: 19 Jul 2015
Location: Ottawa
Posts: 898

2000 Defender 110 Td5 XS CSW Epsom Green

I'd recommend you stop messing about, put it back together and then get it plugged in and scanned. Sounds like a bad ABS sensor or ABS pump fault. Read the codes first then it might help you determine what's up and where to look.

Cheers 2010 Range Rover MkIII Autobiography Super Charged (Idris)
2003 Range Rover Mk III (Desmond FitzWilliam)
2000 Defender 110 CSW TD5 (CTX)
1992 Range Rover Classic (Lizzy)
1972 Series III 300 Tdi (Stanwood)
1967 MGB GT

Every normal man must be tempted at times to spit on his hands, hoist the black flag, and begin to slit throats.
H. L. Mencken (1880 - 1956)

4th Aug 2016 2:27am

roel

Member Since: 08 Aug 2009
Location: Lelystad
Posts: 2039

I don't think I am messing about.
I used my Nanocom and there are No faults recorded.

The ABS has it's own light anyway and a small point I don't have ABS anyway.

I found the problem anyway and solved it, but reading your reaction you probably won't like my solution either.

Click image to enlarge

Looking at the wiringdiagram The + is connected along a resistor to pin 9. After a lot off measuring I noticed that the power did not get to pin 9. So with a test wire I solved the problem and the picture shows my permanent fix.

RF4 RDS you would peobably go to the stealers and pay €300 or more.

Roel

1984 90 2.5 na Diesel - RR V8 (1994-2001)
1997 Camel Trophy Discovery 300TDI (2001-2009)
2005 G4 Discovery III 4.4 V8 (2008-2018) It's gone but it still hurts.
2003 90 Td5 (2009-now)

5th Aug 2016 7:25pm

4RF RDS

Member Since: 19 Jul 2015
Location: Ottawa
Posts: 898

Hey what ever works, man. Glad you got it sorted.

Your solution is workable and fixed it, that's all that matters. I never take anything to the stealers. They just are so crappy. I do all my own servicing and repairs. 2010 Range Rover MkIII Autobiography Super Charged (Idris)
2003 Range Rover Mk III (Desmond FitzWilliam)
2000 Defender 110 CSW TD5 (CTX)
1992 Range Rover Classic (Lizzy)
1972 Series III 300 Tdi (Stanwood)
1967 MGB GT

Every normal man must be tempted at times to spit on his hands, hoist the black flag, and begin to slit throats.
H. L. Mencken (1880 - 1956)

5th Aug 2016 9:06pm

roel

Member Since: 08 Aug 2009
Location: Lelystad
Posts: 2039

Roel

1984 90 2.5 na Diesel - RR V8 (1994-2001)
1997 Camel Trophy Discovery 300TDI (2001-2009)
2005 G4 Discovery III 4.4 V8 (2008-2018) It's gone but it still hurts.
2003 90 Td5 (2009-now)

5th Aug 2016 10:22pm

miker

Member Since: 13 Sep 2015
Location: Surrey
Posts: 1758

There's a few odd transistor based drive circuits that board as well. I need to whip the soldering iron over mine when I do an RS order...

6th Aug 2016 1:40pm

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