Cruise Control Troubleshooting

Matrix733 · Post by **Matrix733** » May 23rd, 2007, 8:01 pm

Hello all, I recently notice that my cruise control is not functioning. I have a 93 1.8l v6 gs. When i press the cruise on button, the light comes on but when the set button is pressed on the steering wheel it does not do anything.

how do i go about troubleshooting this? Is it vacuum controlled? Does it use a relay/fuse?

if you have any advice what to start checking please let me know.

thanks
matrix733

PATDIESEL · Post by **PATDIESEL** » May 23rd, 2007, 10:14 pm

There is a fuse and the cruise is vacuum controlled. I would check the fuse and then the vacuum line. The diaphram can also go out, but I've not heard it to be very common that they fail.

Matrix733 · Post by **Matrix733** » May 27th, 2007, 9:45 pm

thanks, will give it a try

Matrix733 · Post by **Matrix733** » June 2nd, 2007, 5:10 pm

Well fellows, the meter fuse is fine and the line from the vacuum unit under the hood is connected to the manifold.

Is there anymore connections under the hood or can someone point me to a diagram of the crusie control system.

thanks

AlexMX3 · Post by **AlexMX3** » June 22nd, 2007, 1:47 am

Try setting cruise on and then hold the bottom button (not sure whitch it is but is the lower one of the two on the steering weel) for 2 seconds and release press the top button once or twice for 1 or 2 seconds works for 93 MX3 GS 1.8. good luck

fritzfab · Post by **fritzfab** » July 5th, 2007, 12:40 pm

i have the same car and mine does the same thing the light goes on but the car doesnt maintain the speed, is it just easier to take it all out cuz i dont need it , its kinda a pain cuz it doesnt work its like a tease lol

wyldside · Post by **wyldside** » July 5th, 2007, 5:50 pm

Check for a blockage or kink in the vac line. Basically (with the car running) disconnect the hose from the cruise unit and see if there is a good amount of vac suction against your finger. If not, the hose might be plugged or kinked, or the small vac port into the intake might be plugged with crud. I hope that helps. It's a pretty simple circuit to diagnose.