'99 RX300 Cruise control not working - how to fix?
#1
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'99 RX300 Cruise control not working - how to fix?
The cruise control light comes on in the dash, but does not control the speed anymore - just pure decceleration.
Can this be fixed w/o taking to the dealership?
Anyone have a copy of the repair manual that has floated around this board in the past?
Can this be fixed w/o taking to the dealership?
Anyone have a copy of the repair manual that has floated around this board in the past?
#2
Lexus Test Driver
This may sound like a dumb question, but are you setting the speed? Once pressing the on button (by pushing in), you have to push the stick up to set the speed. And then only will it stay at the same speed.
#3
Driver School Candidate
I have the same exact problem. I do set the speed. I try every button on the cruise control. It does not work but when you click the cruise control (on) button it lights up in the dash.
#4
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Yes, I am pressing the button to set the speed.
It won't hold any speed anymore, doubt it is a fuse, as I checked the diagram and didn't see any dedicated cruise control fuse to be blown. If it was a fuse, I'd see other systems not working.
It won't hold any speed anymore, doubt it is a fuse, as I checked the diagram and didn't see any dedicated cruise control fuse to be blown. If it was a fuse, I'd see other systems not working.
#6
I have the cruise control info. But when I try to upload it the upload fails.
I don't know why.
I don't know why.
#7
Moderator
Going on limb here ..
The accelerator cable goes over a 1/2 circle on throttle body. The other half is the cable from the cruise control module which is pretty much at the top of the engine .. positioned in line with the passenger. First examine that linkage. I dont think it is controlled by vacuum. I would suggest clearing out the ecu by disconnecting the battery for 20 mins or so ... just in case there are some gremlins in the software.
Salim
The accelerator cable goes over a 1/2 circle on throttle body. The other half is the cable from the cruise control module which is pretty much at the top of the engine .. positioned in line with the passenger. First examine that linkage. I dont think it is controlled by vacuum. I would suggest clearing out the ecu by disconnecting the battery for 20 mins or so ... just in case there are some gremlins in the software.
Salim
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#8
Driver School Candidate
Going on limb here ..
The accelerator cable goes over a 1/2 circle on throttle body. The other half is the cable from the cruise control module which is pretty much at the top of the engine .. positioned in line with the passenger. First examine that linkage. I dont think it is controlled by vacuum. I would suggest clearing out the ecu by disconnecting the battery for 20 mins or so ... just in case there are some gremlins in the software.
Salim
The accelerator cable goes over a 1/2 circle on throttle body. The other half is the cable from the cruise control module which is pretty much at the top of the engine .. positioned in line with the passenger. First examine that linkage. I dont think it is controlled by vacuum. I would suggest clearing out the ecu by disconnecting the battery for 20 mins or so ... just in case there are some gremlins in the software.
Salim
#10
I found the module in engine compartment. Carefully pressed release tab on electrical connector, pulled connector free. Squirted electro repair conductor grease into each cavity on plug, wiped clean, re-plugged. All functions now perfect.
#11
Thanks,
Bear
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