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Unfortunately the bcu nor the idm store fault codes so they can't self diagnose internal faults so while you will need a Discovery dedicated reader to program a replacement bcu as they are not plug and play, it will not help you identify the bcu as being faulty, only when you have several random...

Was this a one off occurrence, if so put it down to gremlins, if not have fault codes read, cleared and read again when the fault has re occurred so that you are not investigating a historic fault. If there is fault code P0705 position switch monitoring, please be aware that this refers to the...

If you want to understand what is involved in changing an xyz switch, search on line for and download as pdf Vdr 100090 ENG (6) Workshop manual 1999 my on Look in auto gearbox repair for switch - starter inhibitor as this is xyz switch. In removal, if your hands are nimble enough you should be...

You may find this information useful as you can download these as pdf files if you search for them. LRL 0529 ENG 3 Discovery 2 my99 to my03 electrical Library (This will show you where connector 0287 is, be aware this is shown as lhd and rhd models so check). LRL 0436 ENG 2 Circuit diagrams...

Garage who knows what they are doing should take about 30 minutes, mine took 20 minutes but they have small hands and do them regularly. Just for information, the park / neutral circuit uses an earth path to energize it so is not fused. The reverse system takes its power supply from fuse 25 in...

Not the xyz switch, otherwise the green m+s lights would flash.

What you are describing is the default position adopted by the eat (electronic automatic transmission) ecu when a fault is logged in the eat ecu. In Rave, the land rover discovery workshop manual, there is a list of about 19 faults which will trigger this default position. So you need to have...

Knew one was longer than the other. Do you have a copy of rave, lr workshop manual if not can be downloaded from a link on d2boys club web site . In rear suspension it gives a step by step description with pictures of how to change rear hub and from reading o ring fits on hub.

Think the ABS sensor cable is longer on the rear hub.

Simple check, does the red light by gear selector illuminate and P show in instrument display when park selected when the fault occurs. If they do, it is not the xyz switch. If they don't, the xyz switch probably needs realigning

How do you know that your key, or keys are not faulty. What diagnostic equipment have you used.

Is it possible that the bcu changed the transmission register from Automatic to manual (not unheard of) and this was the problem all along and all the garage did was change it back, hence the £25 charge, worth asking in case the fault occurs again.

Yes essentially it is a twisters pair of wires that is used for two way flow of information between two ecus and the number of twists in the wire is critical to its correct operation. on td5 it is a twisted pair on wires that is used for two way flow of information between engine ecu and...

I would check that your workshop is using test book, nanocom or hawkeye fault code reader as flashing m&s lights should log a fault code in electronic automatic transmission ecu so fault does not need to be present to be read, d2 td5 is not obd 2 compliant using landowners own system so other...

Look at the thread d2 auto gearbox fault 2nd October 2018 as the posts may help you understand any fault codes you may find when you have them read. As a matter of interest what is the state of the lights by the gear selector and the gear display in the instrument pack when the fault occurs.

If you want to understand the automatic transmission system in a Discovery 2 you should down load the rave workshop manual available here d2bc.co.uk which gives a comprehensive description of the system, fault codes etc. You need any fault codes read by a test book, nanocom or hawkeye, as any...

Necessity is the mother of invention. In my case after six months, endless visits to local indie and car electronics experts, about £1000 worth of bills and no further forward in fixing problem I finally decided to investigate the mysteries of the automatic transmission system. Rave is...

If you have air conditioning, the drains under the car can become blocked ( the one that empties onto the xyz switch of autos) and then the water leaks into the front footwell either side of central console.

From your description of symptoms you are not experiencing limp mode as described in rave and do not have a problem with automatic transmission. From your description you have similar problems to one's I had, started ok, ran ok up to 30 mph, slow rough running up to 50 mph with heavy...

Do the sport and manual green lights light up on systems check when you turn on ignition. Have the fault codes in the automatic transmission read to see if there are any present, clear them then have reread after you experience limp mode again to see which are current as opposed to historic...