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Unread 03-20-2014, 03:57 PM   #1
ryann04
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WK Reverse Sensors

I installed a rear tire carrier via my hitch.

now when reversing, the parking assist goes crazy thinking I'm about to hit something. Fair enough, now to correct this issue, because the spare tire carrier stays on!

My question is; if I disconnect the two middle sensors (closest to the receiver) will there be an issue with the other two sensors working?

Thanks,

Ryan

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Unread 03-20-2014, 05:27 PM   #2
sickchilly
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No. The system will complain if any of the four sensors cannot be read.
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Unread 03-20-2014, 06:38 PM   #3
Bigdlensch
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You could just turn park assist off when you get in the jeep. I know kind of a pita, I think if you unhook them it will beep at you when you first start it but should turn it off automatically thinking back to mine being covered in ice this winter.
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Unread 03-20-2014, 06:42 PM   #4
sickchilly
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That's actually what I do when I'm trailering. And it's not that big of a pain since it stays deactivated until you turn it back on.
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Unread 03-20-2014, 09:50 PM   #5
Chirpz
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Quote:
Originally Posted by sickchilly View Post
That's actually what I do when I'm trailering. And it's not that big of a pain since it stays deactivated until you turn it back on.
Dittos, I turn mine off when towing too....
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Unread 03-21-2014, 06:44 AM   #6
ryann04
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Good to know. Now to battle the error it will give me if I unplug it. Maybe I can jump the signal over to them while unhooked to trick the system.

I don't plan on removing my spare tire carrier, it will be "part of the jeep" for now on, if it was just a trailer, I could live with it for a couple days...

Options:

1. Disconnect the two inner sensors. Splice the two inner sensors with the two outer, thus sharing a signal and hopefully not reading an error.

2. Disconnect the two inner sensors. Somehow jump the plug with a resistor or something to trick it into thinking its ok..?

Comments or ideas guys?
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Unread 03-21-2014, 07:25 AM   #7
hxdrummerxc
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This is very interesting. Wish I could help, but I have no idea. I want to get a lift with a spare tire carrier one day, whenever I get the money (if ever). And I never thought about it throwing off the sensors like that.

Those two ideas that you have seem pretty good.......... as long as the backup sensors aren't running through the damn pain-in-the-*** Digital CanBus system like the audio and most everything else is. Im gonna keep an eye on this thread.
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Unread 03-21-2014, 09:33 AM   #8
ryann04
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well, I will test my theories when I get a chance after work.
It's cold outside, and hopefully I can access the wire harness without taking off the rear bumper. (The OME lift should help get my fat *** under the Jeep... lol)
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Unread 03-22-2014, 08:36 AM   #9
norwaywj
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Please keep us informed ! I have a front bullbar in front of two sensors
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Unread 03-22-2014, 11:27 AM   #10
sickchilly
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This is indeed a CANbus mess guys. Each sensor is monitored independently. 01-05 are the front sensors (option on export models) and 06-10 are the rear sensors.

Therefore:
1. You can't disconnect any one sensor or the lack of that sensor will cause an error.

2. You can't splice multiple sensors together, that would short two lines together and cause an error.

3. You can't out more than one sensor on one line. That will overload the line and cause an error.

The only thing that MIGHT work is faking out the system with a dummy load (resistor) that keeps the signal within the "no obstacle" range. I'd have to look through the service manual to see of those ranges and the reference voltages are stated for testing. Else, you may have to find the data sheet for the original part.
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Unread 04-04-2014, 06:59 AM   #11
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Sickchilly, could you check what resistor is needed ?
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