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landybear

Member Since: 18 Oct 2015
Location: Tamworth & Worcester
Posts: 134

Help locating TD5 ECM earthing point

I’ve been trying to sort a water gauge fluctuation issue out and have found an issue with using my Nanocom (early model). A bit more research has suggested to reinforce the earth at the obd connector and the Engine ecu with a direct connection to the battery earth to ensure the potentials are the same. After a look at the manuals I now have another head scratcher as the ECM earths supposedly all connect and run to stud C0056 under the drivers seat. After a look I have the stud/nuts covered in original paint and no wiring attached. Any idea where the ECM earth point is?

Click image to enlarge

Click image to enlarge 2003 Defender TD5 Hardtop (current - work in progress)
2014 Discovery 4 HSE (Current) / 2009 Discovery 3 HSE 2009 (Previous)
Disco 2 Landmark 2004, 2001, 2002 (Previous)
Disco 1 300tdi 1996 & V8i 1995, 200tdi 1993 (previous)
Defender 110 300tdi 1993 (Previous)
Range Rover Vogue 4.6 - 2001 (Previous)
Freelanders TD4 (2001 3 door & 2002 5 door) Previous
90 2.5 then converted to V8i (1990), 90 2.25 then converted to v8 (1986) plus others

25th May 2020 7:29am

rallysteve

Member Since: 10 Feb 2014
Location: Cumbria
Posts: 2225

2002 Defender 110 Td5 DCPU Keswick Green

The earth will be on the driver's side of the transfer box. When i swapped my loom over in my 02', the original ECM earth was on one of those studs in your image. The new loom had the ECM earth on a ring terminal next to the transfer box.

Hope that helps ?

Steve 02' 110 TD5 Double Cab Rebuild Thread

25th May 2020 12:09pm

landybear

Member Since: 18 Oct 2015
Location: Tamworth & Worcester
Posts: 134

Many thanks. I’ve solved all my problems by running an additional earth from the internal stud direct to the battery and also cleaning the bulkhead earth behind the expansion bottle. Happy now 😀😀 2003 Defender TD5 Hardtop (current - work in progress)
2014 Discovery 4 HSE (Current) / 2009 Discovery 3 HSE 2009 (Previous)
Disco 2 Landmark 2004, 2001, 2002 (Previous)
Disco 1 300tdi 1996 & V8i 1995, 200tdi 1993 (previous)
Defender 110 300tdi 1993 (Previous)
Range Rover Vogue 4.6 - 2001 (Previous)
Freelanders TD4 (2001 3 door & 2002 5 door) Previous
90 2.5 then converted to V8i (1990), 90 2.25 then converted to v8 (1986) plus others

25th May 2020 1:38pm

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