I have 3 disco 2s. One is giving me shift problems. My live data shows one vehicle speed signal that is acurate. The other is all over the place. I want to try the slabs ecu in a different rover to test it. Can I do it without testbook??

 

Assuming you don't have SLS.

 

I'd look inside the ECM for corrosion.

 

I second that. I got the 3 Amigos several years after my shuttle valve repair with option B. After verifying my repairs were still good, I checked voltages to the modulator and from the SLABS ECU and compared with a friend's D2. After finding slightly different voltages, I borrowed his SLABS ECU, and no more amigos. I've had his in my D2 for the past 3 months while his is down while he considers doing head gaskets. Mine is a 2000, and his a 2002. Neither with SLS.

 

By the way I meant to check the engine computer for green stuff.

 

Thanks for the input. The only feature that this rover has that the others don't is active cornering enhancement. Does that also mean that it is self leveling??

 

If you've got coil springs instead of airbags, you'll be fine.

 

Thanks again! I just looked under it. It has coil springs and conventional shocks.

 

I will mention that there is just one wire/pin on the slabs computer for road speed signal, so if your speedo is showing the correct speed and at least one of the computers is showing the correct speed, your slabs is probably fine. I'd be concerned about the wiring or the computer that has incorrect data.

This is how I found what was wrong with mine. I swapped the slabs from my 03 to my 99 and nothing changed... the engine ecu still thought I was going 88mph, but the speedo was dead on and so was the speed from the slabs or the tcm, I don't recall which I could see with the hawkeye. This was causing the engine to never idle properly.

I opened the engine ecu up and it was nasty. I rolled the dice and WASHED the inside of the computer, connectors, chips, and all, under the kitchen faucet with dish soap, and then rinsed it with alcohol and again with distilled water, and let it dry and tried it again. Of course I'm not advising anyone to do that, except at their own risk of damaging something, but I figured I was going to have to buy a new ECU anyway so what the heck.

 

Provided the SLABS is the same 'family' and functions which can be seen by the serial # or series, all should be OK. Look up the type/serial # and ensure they match. Check to see whether the SLABS stores data and what data is stored from any given vehicle.