Thread: D2a M & S Lights, hazards constant and no power to OBDII

Hi Grimace. The OBD2 port 12v is fused. Have you checked the fuse ? My older nanocom was very glitchy too sometimes. It did however work, sometimes you just needed patience. It's fine for the D2a (which I have). The newer Evo unit, which I purchased several months ago works much much better .... Hardly any glitches at all.

XYZ is either the switch itself or the wiring loom is prone to rubbing through. Trace from switch back. You need to reset the fault using the auto gearbox module of the nanocom. If the nanocom you used doesn't have the auto module it needs to be updated. The Evo does the auto gearbox ok.

Get the EVO. It will make your job much easier.



Kev..


Sent from my iPad using Braille

What Kev said.
Battery would be my guess, they do strange things in Td5 autos.

I would check and clean the ecu connections oil in the plugs can cause m & s issues

The Nanocom Evo if purchased for a Defender will not do anything on a Disco except the TD5. If the earlier Nanocom is the same, even if you sort the OBD plug it will not fix the M&S lights.

I had the same on Disco 2 I had a few years ago. It was the cabling close to the ecu damaged by mice chewing on the wires

If you see mouse poo under the bonnet it could be worth checking your loom for damage.

.

Just saw your other post on the fuel gauge- The other problems you are having are possibly related
During the investigation which, in my case, was mouse damaged wires, it was suggested to me a faulty fuel pump may give these symptoms.
Maybe someone out there knows a bit more about this problem

Thank you for all the feedback guys. Will borrow/buy the correct nanocom to clear the m&s.

Have checked all the fuses and replaced any that were blown. But still no power to the OBDII.

Any one think the hazards constantly flashing is another issue. I forgot to test the actual hazards switch but with it removed the hazards continued to flash so assume that's not the problem.

Originally Posted by Outback 1

I would check and clean the ecu connections oil in the plugs can cause m & s issues

I have done this. There was a lot of oil at the red plug when first removed.

I have ordered a new injector harness and will be replacing that shortly as well.

Grimace, remove the fuse box from under the dash and check it for water ingress/ corrosion. I recently had a d2 with a windscreen leak that caused similar problems, the fuse box shorted and burnt away some of the circuit board and connections. It is a non repairable item unfortunately. I'd reckon bundalene may have one?

Jc