Thread: Brake Light Switch Replacement D4

Hi weakestlink,
I think that you'll find that the problem afflicts other makes with the "same" gearbox. Hence, it is a ZF problem more than an LR one.

After clearing adaptations the slight think time has gone. I didn't consider the wait particularly significant but it is nicer to take off immediately and smoothly rather than with a bit of a delayed surge. It would be good if there was an option for the gbox to not learn.

or tell it to learn not to think so much!

Glad you don't have the problem I had Graeme.

Bob

Ok - blew the front left indicator globe tonite - can I now expect the suspension to go to super extended mode now or something equally silly?

Garry

Originally Posted by Learner

Hi weakestlink,
I think that you'll find that the problem afflicts other makes with the "same" gearbox. Hence, it is a ZF problem more than an LR one.

If Landrover knows the problem occurs with volatage fluctuations then volatge regulation like we have for in U.P.S. systems for server or even work station computers would have been a simple and easy way to avoid a small problem impacting on so many areas of our landrovers systems.

A gear box issue should not be able to affect susspension or DSC. A brake light should not be able to stuff up our cars. Landrover gets very poor kudos for Q.A. for allowing a known issue to be a ongoing issue when a fix would have been fairly straight forward. Surely there is a little slack in $100,000 odd purchase price to avoid a multi systems failure cuased by one of several minor problems which have a minor effect on voltage?

Now a 18inch wheel option is available I could look at a D4 to replace my D3 when needed. Now I am not at all sure I would consider it given this problem. It is fixable but should not exist. Zulu Bravo!

Originally Posted by weakestlink

If Landrover knows the problem occurs with volatage fluctuations then volatge regulation like we have for in U.P.S. systems for server or even work station computers would have been a simple and easy way to avoid a small problem impacting on so many areas of our landrovers systems.

Voltage regulation to the level expected by many IC manufacturers is a lot harder within the environment of a car engine bay than your 240V supply at the office. Military-spec components will achieve it, but at cost and around a 5 year lag in features/development. Hence the dog-chasing-tail attempts of car manufacturers to produce fail-safe systems that can reduce catastrophic systems failure. They get a fair bit of it right, but there's still a lot of "butterfly effect" that is in practice untraceable, let alone being addressed.

Cheers,

Gordon

Its got nothing to do with voltage, rather the "smartness" of the gbox ecu to adapt its gear selection to a driving style but the minor lag that seems to develop over time is an inappropriate consequence and IMO should better programmed. However my gbox behaves much more reasonably since its s/w was updated a few weeks ago than it did previously.

Its also my opinion that LR erred in having the suspension ecu react to any fault reported by the ABS ecu by lowering the vehicle to a "safer" height.

Originally Posted by Graeme

Its also my opinion that LR erred in having the suspension ecu react to any fault reported by the ABS ecu by lowering the vehicle to a "safer" height.

That decision's got me stumped too - it should "freeze" the car at whatever height it's currently at. I don't understand the logic behind thinking that the system is only safe at access or bump-stop height. Short of a compromised air-bag, it's a better bet to leave the car at current height. I've tried getting a D3 out of a forest track on its bump-stops, and it wasn't pretty .........

Cheers,

Gordon