Flashing M & S

[bov17]

Hi Everyone,

Very new to Landrovers, my father and I just bought a Discovery2 2002 TD5 auto with 200k on the clock.

Over all with the exception of a slight leak from the transfer case she is in great condition. With one exception.

We have started to see the M & S and D(selected gear on the dash) lights flashing as well as the two red lights either side of the gear selector.

Happens at random times, and I have done quite a bit of reading and have a couple of questions if someone may be able to answer?

What size battery should we have in her? The voltage was 12.7 off, and 14.x running.


Have checked the earths for the battery and they are clean and firm.

We also unplugged and checked (what we think is the right thing) on top of the gear box actuator (but again, we are not 100% we checked the right thing here)

What else should we be checking? After switching her off and back on it seems to clear and happily drive.

We took her for her first off road experience on Sunday and went flawlessly however yesterday and today just driving to work, 3 times on a 40k drive here. and once on the way home yesterday.

Not sure how to check the XYZ switch? When it is in reverse, put the windscreen wiper on and the rear turns on (even in limp mode)

Your help would be greatly appreciated!

Cheers

[alien]

Welcome to AULRO.

If M&S light only flash on the dash it's battery related, your reading looks fine.
Your M&S lights include the ones on the selector so it's transmission related.

My suggestion is to clean the XYZ switch as it could be water contaminated from the air conditioner drain tubes.
Lots of information and links to the above repair in this thread...
http://www.aulro.com/afvb/discovery-2/162615-causes-solutions-flashing-m-s-lights.html

Also check the wire harnes where it goes over the top of the transmission.
There have been a few cases of wires shorting due to the conduits be rubbed through.

[Bohica]

Not sure how to check the XYZ switch? When it is in reverse, put the windscreen wiper on and the rear turns on (even in limp mode)

Your help would be greatly appreciated!

Cheers

The rear windscreen wiper does do that, easier to see out the rear window when reversing.

Cheers and welcome

Julian

[PhilipA]

Not sure how to check the XYZ switch? When it is in reverse, put the windscreen wiper on and the rear turns on (even in limp mode)
I recently had to disconnect the selector as I removed the floor of the console.
The XYZ is properly adjusted when the dash indicator says the same as the selector, and the lights on the selector agree with the dash. I initially had mine a bit out but it literally fell into the correct adjustment when I loosened the jam nut.
Regards Philip A

[bov17]

Thanks for the replies.

Thanks Alien, Ill go through that page and see how we go.

Will report back what happens :-)

[bov17]

Hi guys.

Bit of a development. Well maybe.

I have noticed just before the lights come on the d on the dash flashes slightly. Then again. The the green m and s lights come on and limp mode.

Not sure if this is an indicator to the problem. Whitnessed this 4 times on the way home today. Somewhat frustrating off and on a bunch of times to get home haha.

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[Road Stone]

Hi,


Does sound like its XYZ related. They are expensive too so the above suggestion of cleaning it is the first step.


Low volts on the battery can also make this happen, I think N70 is the smallest battery you should have fitted?


Cheers, Jerry

[sierrafery]

Watch carefully, are you certain that the flashing symbol is D not a crossed B?

[bov17]

Watch carefully, are you certain that the flashing symbol is D not a crossed B?

I don't believe so no.

Definately appeared to just flash flash then flash flash and green lights came on.

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[bov17]

Will check out what battery I have now.

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[bov17]

N70ZZMF is what's in it.

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[justinc]

You really need to get some proper diagnosis done using a diagnostic scan tool like nanocom etc. Check the members with diagnostic equipment section for your nearest one. Many of these faults while actually driving along are also to do with actual transmission problems like tc lock clutch failure or a clutch set with excessive clearances . I have to warn you that 200k is getting close to the 4hp22e gearboxes' end of lifespan.

[bov17]

I don't seem to be able to find that section :(

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[Pedro_The_Swift]

PM sent.;)

Lots of info here about MS lights,, pretty common thing as these cars get older. As long as you dont have to replace the switch the fix is usually fairly cheap.

[apachefreak]

Hi bov17
I have been through this before with my MY02 D2 with the MS lamps,
I had went to the trouble of taking my XYZ switch apart and cleaning it etc, (nothing wrong here, but felt good to check), if you decide to do this, note you should not be able to start your D2 in any gear other than in the P position.

Back to your MS lamps, if it is any thing like what I have experienced,
Give your main battery a full charge and give it another go,
failing this, replace your main battery!
You may find you have the cranking amps to start your D2 but the charge holding capacity of your battery maybe depleted.

I recommend to give this a go first :)

[bov17]

PM sent.;)

Lots of info here about MS lights,, pretty common thing as these cars get older. As long as you dont have to replace the switch the fix is usually fairly cheap.

Thanks for that

[bov17]

Hi bov17
I have been through this before with my MY02 D2 with the MS lamps,
I had went to the trouble of taking my XYZ switch apart and cleaning it etc, (nothing wrong here, but felt good to check), if you decide to do this, note you should not be able to start your D2 in any gear other than in the P position.

Back to your MS lamps, if it is any thing like what I have experienced,
Give your main battery a full charge and give it another go,
failing this, replace your main battery!
You may find you have the cranking amps to start your D2 but the charge holding capacity of your battery maybe depleted.

I recommend to give this a go first :)

I will borrow a good multistage charger and give it a charge and see where it goes.

I think for prosperity I might replace it anyway.

[d2dave]

N70ZZMF is what's in it.

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Smaller than the LR recommended battery. LR recommend 110 AH capacity.

N70 is around 90 AH.

[sierrafery]

There are 18 ''official'' reasons for flashing M+S warnings, 15 of them are together with limp mode, 2 with no aparent effect and 1 which will let it operate only in economy mode... low battery power and XYZ switch are the most common but it's possible to be any of the many so the best is to read the stored fault code and if there isnt one it means it's battery voltage or old/low oil related

the list of faults is in in RAVE - Workshop manual - Automatic gearbox - Operation (DESCRIPTION AND OPERATION 44-19)/(page 816 in my version)

[bov17]

Ok. So we put a scan tool on it. Nada. Nothing. Haha

Have now pulled the xyz off. Stripped cleaned was gunk in it but not so bad. Main observation was the pins that actually press against the board were hardly touching.

Cleaned them adjusted to contact properly. Put back together sealed her up.

Checked the air con drain pipe. Has already been extended. Win.

Put back together and had alignment issues. The old man helped align it and now NO LIGHTS.

Yet.

So will take her for a good drive tomorrow. I have ordered a second hand unit in case and will replace the battery anyway with a bigger unit.

What does everyone else run?

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[Pedro_The_Swift]

Calcium.
Unless you have a fridge or a winch the standard size is fine.:cool:

[bov17]

Calcium.
Unless you have a fridge or a winch the standard size is fine.:cool:
Have dual batteries. But the start battery is 70ah and 700cca.

Seems to be well below the standard size

[sierrafery]

Ok. So we put a scan tool on it. Nada. Nothing. Haha


what kind of scan tool cos those autobox P codes are not compliant with OBD2 protocol so a generic reader might miss them, if the warnings were caused by the XYZ switch there should be a P0705(gear position switch incorrect outputs) code stored... even for low battery if it fails below 9V while cranking(or engine running), which is not impossible with a such weak battery or if the charging system fails it should store a P1562 code(this one is not part of the OBD2 protocol and the other P0705 is recognised only on compliant vehicles and means something else

[bov17]

Yes was an obd2 reader from local mechanic. Even with just the switched clean now it's yet to fault (limited driving but it normally would have even driving out the driveway)

[Pedro_The_Swift]

and will replace the battery anyway with a bigger unit.

What does everyone else run?

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search in bottom left of page,, "TD5 replacement battery"

These seem to be a popular replacement,,
you will need to check dimensions
https://parts.cat.com/en/catcorp/115-2422

not sure on availability on the coast though:p