Thread: Cruise control

Could be cruise control ECU. Brake switch and vacuum lines are the usual suspects - but you've checked them. I had the same symptoms on both my old Discovery and current P38 - the occasionally working thing is the main clue I think - it got progressivly worse until it rarely worked. Replacing the ECU on both vehicles fixed it up. It was part number AMR 1173 for both my vehicles ('98 Disco and '95 P38) - I believe later model P38's use a different part.

ECU is located near the steering wheel in that access panel under the wheel

Have you reset the brake switch ?

You have to remove the main panel under the steering wheel and the black panel that surrounds the pedals.

Reach up the brake pedal until you feel the switch plunger.

push the brake down out of the way and gently pull the plunger out towards the brake you will hear a ratchet clicking sound.

Then slowly release the brake pedal and it will click it to the correct position.

This works for me when I occasionally lose CC as you have described.

For 10 minutes effort it can't hurt to try.

Dave

Thanks Fellas, was afraid of the ECU bit... Anyway, LR stealer said its NLA, No Longer Available. Anyone ever contacted a UK dealer for parts and if so any recommendations? Also any wreckers to ask?

Perhaps try some of the local independent Landrover Spare Parts suppliers for your ECU. Or get a second hand unit - some suppliers will back their used parts with a 3 month replacement warranty.

ebay.co.uk is your friend - search for 'p38 cruise ecu' or similar

Agree withy Junosi on the ebay.co.uk they have it all and super cheap compared to here... you just need to wait and pay a little extra for freighting from UK. I have used Island4X34 and P38spares and both are good to deal with and reasonably competitive for freight and time. Also try Andrew E on this forum as he wrecks a few P38's and may have parts sitting here ready to express post to you.

Ok update.

Gone through the ETM in RAVE again. Seems i have no signal from the BECM to terminal 11 on Cruise ECU. Asks for 5 volts with ignition at stage II and 2.5 Volts ignition at stage II and wheel spinning. Cant even get the 5 Volts without wheels spinning. Not a broken wire as i have this YR (Yellow red) wire back to the BECM and tested. Hmmm, anyone good with BECMs? I have hooked up my Faultmate to see if speed signals are going around and there are signals from all 4 ABS sensors, from the gearbox sensors and from the GEMS. Where to now??

I had problems with non-functioning Cruise Control in one of our 2 x Pre 99 HSE Range Rovers... did all the normal troubleshooting to no avail. Purchased a Good Used Cruise Control ECU (AMR1173) and resolved all issues.

Very quick and easy to change over, was only 20 Pounds Inc Shipping from the UK for a good used one.

Theres 3 or 4 on Ebay UK/USA at the moment.