Question about 1991 Toyota MR2

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My cruise control does not work all the time and when it does it will speed up on it own and then cut off and will not come back on.

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Try swapping out the CC Module.

Posted on Jan 10, 2010

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1 Answer

Cruise control not working


cruise controls are dependent on the following sensors all working together
brake sensor
clutch sensor
auto--vehicle speed sensor
rpm's sensor
fuse for the cruise control
cruise control switch either or all not working will stop the cruise control from engaging
road speed at which you can engage the cruise control has to be above a reset speed before it will cut in and work

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cruise controls will disengage automatically if the road speed is too slow ( higher for manuals than autos ) so if the road speed is below around 20mph it may not engage at all as the VSS says it is too slow for the engine rpms
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Cruise control doesn't stay on in my 2004 Chevrolet Cavalier?


not being informed if it is auto or manual, here are some of the items that control the cruise control
brake pedal sensor ,
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Cruise control stopped working


no year stated, wow.
the first checks are not the CRUISE.
they are:
1: all fuses good.
2: CEL lamp out driving, if not the PCM will in fact cut Cruise function ( preventing TOYOTA SYNDROME)
3: scan tool do a full PCM scan, got errors. got DTCs, bingo.

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Cruise control not working


as it an automatic and one of the sensor for the cruise control is the VSS then I would be suspecting that there is a problem in the overdrive of the transmission -could be harness connections , TCM
cruises control need these items to operate
brake witch to be operational-- touching the brakes cancels the cruise control
VSS to be operational , --reports the speed of the vehicle so that the cruise controlled speed can be maintained
tachometer to be operational --- will shut the cc of if there is a speed limiter involved
gear position switch to be operational ECM to be operational
if any one item has a break in circuit , the cruise control will turn off
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Check for a vacuum leak...or have someone check for a leak.

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Cruise control not working


there are 2 possible parts here, one is a transmission speed sensor, this part tells the cruise what speed u set and keep it there, the other is the the actual actuator that holds the throttle at the right position to maintain set speed, other less common issue's make sure the brake and clutch (if manual trans only) cruise cut off switche's are ok

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It works off the speed sensor on the tranny. The information goes thru the computer from the speed sensor and then controls the throttle. Hitting the brakes just cuts (shut) the speed control (it turns it off) The brakes have no control

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CRUISE CONTROL


My 2003 Ram 1500, would not engage the cruise control, when the speed sensor on the rear axle, was the problem. The other symptoms, speedometer worked irregularly. Replaced speed sensor on top center of rear axle, and problem went away.

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