My '91 Celica GTS has a cruise conrtol that works only some of the time. The green light says "cruise control" (or "on") all the time when I turn it on, but the actual cruise control will engage only some of the time. It seems to be completely unpredictable. Can anyone offer any suggestions? Thanks!
Check the vacuum line coming off the intake running to the cruise control actuator. Everytime you push the cruise button the light always comes on but, when it actually working when you feel the gas pedal move from your foot.
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Check the cruise servo under the hood...usually on the driver side of the car...there should be a cable that either comes from the throttlebody or comes out of the firewall and connects to the servo..most are vacuum operated and the diaphragm becomes brittle and leaks air over time.
yes u can remove your cruise control on your celica (sept #1 take out or disconnect the cruise control cable on the throtle body then disconnect the wiring harness on the cruise control unit and if theres a vacum hoses connected just plug main vacum supply hose and your cruise control is already disable
The idle on these is controlled electronically by an IAC solenoid (idle air control). Adjusting the screw will not do anything to adjust your idle down. Chances are you could have a vacuum leak, or a faulty IAC solenoid. I would start by checking for vacuum leaks.
I had a similar problem and it turned out to be the brake fluid level. This may be an answer. Also have you had the brakes checked. The cruise control is integrated with the brakes. Any little thing wrong with them effects the cruise.
I had a problem with the interlock switch located on the brake pedal. There are too switches one for the brake lights and one dedicated to the cruise control. If either switch is acting up it will affect the cruise control. Then interlock switch is the same switch that is used on the clutch with cars that have a manual transmission. It has smaller electrical terminals in the connector than the brake light switch. You can jumper the connection and see if it solves the problem. You still have the other switch that will disengage the cruise control when you hit the brake. If that is the problem then that's the one you need to replace.
Most cruise controls are designed to disengage when you press the brake pedal. I always mention this first because people tend to try to press the clutch pedal while the cruise control is engaged and this startles them when the engine revs up all the way...
Anyway, to use your cruise control:
1) Press the Cruise control button to on.
2) Drive up to the speed you need to go.
3) Press the "Set/Coast" button.
4) let go of the accelerator pedal
If the cruise control system is operating correctly, your vehicle will continue to travel at the same speed until you either press the brake pedal or you cancel the cruise setting with the cancel button of the cruise control.
Remember: Your civic is not equiped with a radar system for your cruise control, so if you are aproaching an intersection or traffic in front of you, do not expect the car to know it needs to stop. Also, cruise control only operates the accelerator pedal i your car, it is not autopilot, so it will not steer your car for you.
(you think it sounds silly that I am writing this? You should see my friend's car... He thought Cruise control was like autopilot, so he smashed his brand new civic into a tree...)