anyone tested their pedal motor? - Jeep Commander Forums: Jeep Commander Forum
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post #1 of 14 (permalink) Old 11-06-2017, 11:06 PM Thread Starter
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anyone tested their pedal motor?

Has anyone found a way to test the pedal motor with it still in the vehicle? I would like to see if it works, and it is not the switch.
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post #2 of 14 (permalink) Old 11-06-2017, 11:36 PM
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Originally Posted by johnc View Post
Has anyone found a way to test the pedal motor with it still in the vehicle? I would like to see if it works, and it is not the switch.
Are you referring to the motor for adjustable gas/brake pedals?


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post #3 of 14 (permalink) Old 11-06-2017, 11:56 PM Thread Starter
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The motor that runs the pedals, yes.

Yes, that motor.
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post #4 of 14 (permalink) Old 11-07-2017, 12:04 AM
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Originally Posted by johnc View Post
Yes, that motor.
I've never had a problem with mine, I just press the button and the pedals move.

I'm guessing that your switch for the adjustable pedals is not working?

If that's the case, I'd say there is a much stronger chance that the switch is bad - not the motor.

That being said, I don't know how your would test the motor by itself - and I don't know how difficult it is to get to.


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post #5 of 14 (permalink) Old 11-07-2017, 08:55 AM Thread Starter
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On mine, I was able to take apart the switch, and clean the contacts. It sorta worked, and the pedals moved somewhat. The motor will make a noise like it is binding on something. To make sure the problem is not an out of phase issue between the brake and accelerator, I pulled the teleflex cable loose. No change, still acting like it is constipated-wants to go, but grunts.

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post #6 of 14 (permalink) Old 11-07-2017, 11:51 AM
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Originally Posted by johnc View Post
On mine, I was able to take apart the switch, and clean the contacts. It sorta worked, and the pedals moved somewhat. The motor will make a noise like it is binding on something. To make sure the problem is not an out of phase issue between the brake and accelerator, I pulled the teleflex cable loose. No change, still acting like it is constipated-wants to go, but grunts.
That may very well be a bad motor then from the sound of it.

That's a first though, I haven't heard of anyone having a problem with the adjustable pedal motor before.


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post #7 of 14 (permalink) Old 11-07-2017, 12:40 PM
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I agree, this is a first for me. We used ours all the time throughout the years and no issues. I haven't seen anyone else have this issue here or on that other forum. Let us know if you end up replacing the motor. Would be awesome to have a write-up for this should others begin to have the issue.
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post #8 of 14 (permalink) Old 11-08-2017, 08:27 AM
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I'm pretty sure there's something wrong with mine. The pedals only travel maybe 0.75" max before stopping. I assume the adjustment range would be more than that, and there's probably just an issue with the gearing mechanism, but it hasn't bothered me enough to dig into it. After the pedals stop moving, you can still see tension on the cable, like the motor is trying to move them but they're "stuck". I'd be interested to hear what johnc finds. It sounds like our issues are similar.
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post #9 of 14 (permalink) Old 11-13-2017, 06:44 PM Thread Starter
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There was a posting about problems with the pedals back in 2008:
https://www.jeepcommander.com/forums/...downwards.html

I seem to remember another post about failure of the gears in the motor. I could not find that one.
The motor is not removable unless you drill out some permanent fasteners. The entire pedal assembly is supposed to be replaced. I have not seen just the motor in online searches for parts.
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post #10 of 14 (permalink) Old 11-14-2017, 12:07 AM Thread Starter
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I took another look at it. The motor connection has just 2 wires. I checked the voltage on these. The current was good- positive one way, and negative the other way.
I was able to remove the motor via 3 torx bolts holding the motor to a 90 degree small gear box (a thick steel rivet holds this gear box in place). Motor spun in one direction only, and hardly any torque. The motor has a worm gear powering a single gear on a jackscrrew. As the gear turns, the jackscrew is run in or out, and that positions the brake pedal. This gear is plastic, and it was cracked. The motor may have been mis-indexed and kept driving at one limit, cracking the gear, or burned up as it kept driving against a non-meshing cracked gear.
The system also adjusts the accelerator pedal through a teleflex cable on the other end of the the motor. Both these have to be synchronized in their drive range. There may be an input to the computer to brake the system if the two pedals get out of synch as well.
So it is possible to test the motor, but one has to be careful the gear on the pedal jackscrew stays where it was, and the gas pedal drive cable will have to be disconnected when you test the motor, or it will not match the brake pedal postion after the test.

In summary, had the gear not been cracked, I could probably matched the numbers off the motor with another chrysler/jeep product donor and it would have worked.
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