By damian on Monday, April 16, 2001 - 10:36 pm: Edit

I've posted this before, but unfortunatly have lost the solutions.

Basically CC does not work. The vaccum hose is OK. So what other things should I look at, and in what order, obviously I do not want to replace parts un-necessarily.

TIA

By Kevin D on Tuesday, April 17, 2001 - 07:45 am: Edit

After eliminating the more obvious vacuum leaks, the steps for diagnosing cruise control system problems are in the LR genuine electrical troubleshooting manual (typically specific to a year and model vehicle).

Alternatively, I obtained the diagnostic procedures through http://www.alldatadiy.com/ (disclaimer: no affiliation etc...). I subscribed for my 93RR at a cost of $19.95 for one year.

Using a multi-meter, I checked the operation of the cruise ECU, main switch, steering wheel switches, brake switch, speed sensors, wiring, etc. The hardest part was dis-assembling the lower dash panel to access the ECU and its wiring harness (procedures were in my workshop manual).

I found my cruise control problem was a failed vacuum pump which is located in the front left of the engine compartment. It doesn't seem to be serviceable, and a new replacement part is about $300 list price. So I am going without cruise control until I determine a lower cost solution.

By hisk on Sunday, May 27, 2001 - 04:58 pm: Edit

Check the actuator above the injection system( throtte cables) The rubber diaphram may have a leak. Goop it or tape it to seal and check it. It may need just a little sealer of some sort. save you 150. scott

By dave on Monday, May 28, 2001 - 03:56 am: Edit

Mine had stopped working a while back. It turned out that the switch on the brake pedal had popped out of its bracket.

Its worth checking if you have not already.

By Rob on Tuesday, May 29, 2001 - 09:58 am: Edit

After a crack in the tubing check the diaphram. Pull the tube out of the diaphram. Squeeze the daiphram gently and not all the way. Now put your finger where the tube was the hold in the air. If the diaphram releases you have a hole somewhere in it. If it holds lets look for something else.
This procedure should take about 2 seconds.