Thread: How do I fix this - RRS

When doing a hard reset:

FIRST - open the bonnet - so you don't wake the car up again by opening a door!!

Then: exit car, close all doors and wait around 3 mins until the clock goes out. Then disconnect battery leads and either wait 10 to 15 mins, or short them out. This is to ensure there is no residual charge in the capacitors before you reconnect.

Now reconnect the terminals and restart the car. If you need to repeat, you have to go through the whole procedure again.

Seeing as your're not getting any suspension errors, it could be the TCM that's got wet? It's behind the battery on the firewall. Check that the connectors are not wet or corroded.

Cheers,

Gordon

Originally Posted by drivesafe

Hi Garry, I could be wrong and I hope Sniegy is about so he can give the correct advice if I am wrong, but a system reset requires the battery leads to be removed and then the positive and negative leads need to be held together, shorted, to give a fully system reset.

Note, if you have a dual battery system, make sure the leads are removed from any auxiliary batteries and if towing a caravan or camper trailer make sure it is unplugged before shorting the cranking battery leads together.

AGAIN, hopefully Sniegy can confirm or discredit this reset method.

This is correct Tim.
Also as Gordon has said the time in between steps is also critical.

Thanks guys.

Garry, check the connections in the TCCM (Transfer Case Control Module) any sign of corrosion will require a good clean of the terminals.

Again when disconnecting ECU's from the vehicle, again wait for the vehicle to go to sleep for a good 5 mins before disconnecting battery.

Cheers

Thanks to everyone for your posts and information - there is a lot of information.

The fault was still in the car this morning when I got up so I lifted the bonnet and left it while I had breakfast. I then did the hard reboot. Checked the error and it was gone . Hi/Lo Range available etc.

Went down to Repco to get a radiator hose for my 101 and all was well. As usual Repco did not have what I wanted so I decided to go to SuperCrap. On starting the error was back - no low range. Drove to Supercheap and got my hose - on start the error was gone and I checked if I had low range then the error came back so stuck in low range - did not fancy driving 10km home in low range. Switched off and waited a minute or so and switched back on and error was gone and drove home without a problem. Just checked it again and all is OK - fingers crossed.

Gordon - glad you mentioned the TCM - that is probably the problem - yesterday morning I took the battery cover off and this was one area that the detailers had missed before I bought the car to I used the hose on spray (not jet) to clean things up. Must have got some water in the TCM - surely it should be water proof. So what happens if you drive through a deep puddle - do you loose low range.

I addition to the hard reboot I understand that there is a soft reboot using the igntion and door locks - is this so? and what is the routine as I cannot find anything on this.

Thanks to everyone for your help - lets hope the problem stays away - no back to gremlins in the 101.

Garry

No, the TCM (TCCM) is NOT waterproof!! Water from wading will rarely get that far up due to air being trapped at the top of the engine bay, but washing it is a no-no!

You'll need to remove the battery, get the TCM off the firewall, disconnect, dry it and all leads thoroughly, reconnect. Good idea to waterproof it while you've got access. If the terminals are corroded, you may need a new TCM

Cheers,

Gordon

Originally Posted by gghaggis

No, the TCM (TCCM) is NOT waterproof!! Water from wading will rarely get that far up due to air being trapped at the top of the engine bay, but washing it is a no-no!

Another example of poor design on a vehicle that is supposed to be a full on capable 4wd. It is not unexpected that engine bays will get dirty and require cleaning in the traditional way - to me any component in the engine bay should not be able to be damaged by water.

I guess the good ole days are gone.

Garry

Originally Posted by ivery819

Garry.
Have you tried lowering the vehicle and locking it in access height then shutting down and exiting and door locking it. Give it 30 minutes and try again ?

ADMIRAL
Have they checked under the front seats and that the runners are not interfering with the wiring loom. There is a power feed to the back of the gear selector system that can spike the gearbox module and cause strange 'bus ' faults.

My response exactly. I released the loom from the clips on the seat, and reattached loosely with zip ties. The frequency of the issue occurring dropped to 2 in 6 weeks. The dealer checked the loom and reattached ( they also advised that there was nothing in the loom to cause the issue )
The problem resurfaced big time within a day of the dealer service. I think they realise it may be a gearbox issue now, and not suspension.

I have driven over 2000km since the problem showed itself. The more the car is used the less the fault appears and can now be cancelled just by turning the ignition off and back on.

Seems that the module did get splashed and is slowly drying out - where I live corrosion is not likely to be an issue but when I next have the battery out I will pull the module and put some lanolin on the cantacts and try to water proof it.

Cheers

Garry

Hi Garry,
go to a good electrical "goodies" place - like Jaycar for example and get the correct silicon for the job - they have special stuff for sealing electrical contacts (it's non corrosive) - I can't remember the name just now - just ask them and they'll put you right. Failing that I'm sure someone here will steer you towards the right "stuff".
cheers