TDV6 2.7. Engine not start after fording

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Originally Posted by DazzaTD5

My obvious thought there is prolly some blown fuses (on the passenger side behind the glovebox), but the below fault will bring up a whole list of what seems unrelated faults as you have listed.

This is a common fault on the D3/early RRS.
"Lost communication with transfer case control module"
When the Transfer Case Control Module gets wet, (pressure cleaning engine bay, water crossings, body seals above failing) eventually it shorts a circuit on the pcb (the computer board), its behind the battery, behind a plastic cover.

When I replace them (round $600 from memory) I open the aluminum housing and waterproof the board with circuit board lacquer, then seal the alum case joints with sealant, finally use rubber grease on the seal for the plastic cover. Spray the whole lot with waterproofing.

The transfer case control module needs to be initialized/calibrated before it will function again. but the vehicle can be driven as a manual, as in use in sports mode and change gears, it will up-shift as you shift, but do be careful as it will also down shift as you shift, meaning it will go down into gears at speeds it prolly shouldnt.

Thats where I would start...

Regards
Daz

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The ecu behind the battery appears dry...very dry dust. Do you mean a controller on the transfer itself?

Have seen water in the bottom of the engine bay fuse box. One wire hanging down with a connection was damp...cleaned this out with water dispellant.

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Originally Posted by LandyAndy

From Gordons GOE seminar,you need to check/clean the connections at the air-compressor and above the rear strut(cant remember if its on the left or right hand side.
The tranny/transfer ecu was the other location,you are already onto that one adj to the battery.
GOODLUCK.
Andrew

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Hi Andrew,
Great information too. I'll have a look at the air compressor etc.....when/if it stops raining.
Thanks

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Originally Posted by Chilly

Do you mean a controller on the transfer itself?

Have seen water in the bottom of the engine bay fuse box.

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No, its in the vicinity of the engine bay fuse box and battery.
Water in the engine bay fuse box is not a good sign.

Given that water got into the car and that the car only had issues once you began driving uphill, I would hazard a guess that you may have issues with water getting into connectors at he rear of the of the vehicle.

I would suggest you lift the carpet at the doors and check that the channels that house the front to rear wiring (including canbus wires) to make sure it is dry.

Work your way to the back of the vehicle making sure all connectors (if any) are dry.

Have you got a snorkel and have you checked the air box to see if there is any water in there or the filter is wet?


It is possible that there was water in the air box and when you accelerated it was sucked into the engine, whereas it was OK while idling with little air flow.

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Originally Posted by BobD

Have you got a snorkel and have you checked the air box to see if there is any water in there or the filter is wet?


It is possible that there was water in the air box and when you accelerated it was sucked into the engine, whereas it was OK while idling with little air flow.

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Air filter was damp but not wet/soaked. no signs of water in any housing after filter. I do have a RAI fitted.

Sounds like you have multiple issues, if you have water past the air filter, which it sounds like you do, then your likely to have issues with injectors. I take it your RAI snorkel had not been water proofed?

It doesn't take a lot of water to partially block injectors, if your filter has moisture in it and your running the engine then your sucking what ever moisture is in the filter through it and into the engine via the injectors.

Water in electricals is more likely to stop the engine from running at all, not just run rough.

Anyway good luck with it and I hope it's not injectors.

Water up to the side air in take? That's quite deep.

As said earlier. Lift the sill plates and feel inside the cavity for dampness, particularly if you sat in water for a while.

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Originally Posted by TerryO

if your filter has moisture in it and your running the engine then your sucking what ever moisture is in the filter through it and into the engine via the injectors.

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Late night Terry? Only if water in the fuel.

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Originally Posted by Graeme

Late night Terry? Only if water in the fuel.

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I assumed that's what he meant.