Thread: New inhibitor switch but still have "S & M" lights.

99.999% it would be the throttle potentiomer/ pedal.
If you are getting 'driver demand' codes then that is confirmation.

JC

If the inhibitor switch isn't adjusted properly it will also throw M&S faults. Check that when you pull it through every gear that the correct gear is being displayed on the dash.

Will have to go and get the codes read I suppose. I set the inhibitor switch with the proper tool, so would have thought the settings were ok, and it ran ok yesterday but will double check tomorrow.

Dave

Just to reiterate what Slunnie said... run the shift through and check that the correct gear is showing on the dash display. If not, just get under there and fiddle lol

Have run through the shifts, correct gears showing on dash display and selector, did check that when replacing the switch,

Originally Posted by pomiron

Have run through the shifts, correct gears showing on dash display and selector, did check that when replacing the switch,

Could be a dying battery.

It could be all of the above or it could be the absolute pain in the preverbial that I just went through.

Had exactly the same problem with a box couldnt find the fault, changed the inhibitor switch twice for new ones. Checked all the wiring looms including the one in the valve body assembly to find no faults in them...

Still had M & S and limp home.

Pulled down the valve body completely and put it back together again.. good for 3 days and bang it comes back.

Changed the Auto ECU no change.

Out of pure frustration changed the wiring harness from under the centre console down to the box and lo and behold problem goes away.

Checked the one that was pulled out sitting on the bench... still cant fault the harness no matter what was done.

Problem fixed but none the wiser to what caused it.


Doc

I have seen this on a few vehicles now that they are getting older & i had this on mine too.

Check the metal "P" clip that sits atop the transfer box. The wiring loom from the multiplug under the centre console to the gearbox travels through this loom. I found on mine where the aluminium protective foil is, it is kept in place by a metal "P" clip on the rear of the transfer box, that is where i found 2 wires cut. Causing good contact, no contact, intermittant contact...No so fun across the Simpson Desert.
Also check the connector on the gearbox, it is a twist style connector, seen a couple come loose, which will also cause the pair of lights to come on.

HTH.

Cheers.