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Old 05-09-2015, 07:14 PM
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Service Start/Stop System Message after Air Force One Brake System Install

We traded our 2005 Jeep Grand Cherokee Limited for a 2015 Jeep Cherokee Limited to tow behind our motorcoach. We just picked up the Jeep from the installation of an Air Force One braking system. They powered the braking system off of the battery by connecting the B+ to the battery B+ and the ground to the battery negative terminal. On my drive home I got a Service Start/Stop system message. I stopped turned off the car and after restart the indicator was gone and the EVIC said that the Start/Stop was working normally. After about 4 stoplights the message returned. I am wondering if the ground connection to the negative terminal instead of to sheet metal is the problem

Bob
2015 Cashmere Limited with ADII

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Old 05-10-2015, 03:52 PM
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Re: Service Start/Stop System Message after Air Force One Brake System Install

Quote:
Originally Posted by Vagbnd View Post
We traded our 2005 Jeep Grand Cherokee Limited for a 2015 Jeep Cherokee Limited to tow behind our motorcoach. We just picked up the Jeep from the installation of an Air Force One braking system. They powered the braking system off of the battery by connecting the B+ to the battery B+ and the ground to the battery negative terminal. On my drive home I got a Service Start/Stop system message. I stopped turned off the car and after restart the indicator was gone and the EVIC said that the Start/Stop was working normally. After about 4 stoplights the message returned. I am wondering if the ground connection to the negative terminal instead of to sheet metal is the problem

Bob
2015 Cashmere Limited with ADII
Bob - Being that it's intermittent, have you pushed all the fuses and relays down in the fuse boxes? The Power Distribution Center is in the engine compartment. It's the large black rectangular box on the drivers side. Many, including me, have found quite a number of them not fully seated. The Body Control Module is in the interior by the driver's knee behind the small compartment door. I have not heard of anyone finding those fuses loose.

I've seen posts about the message you're reporting but have not read anyone getting a solution. Are you also getting the (A)! icon in the EVIC. The owners manual says to take it to the dealer.

On the installation method, the owners manual cautions tapping into the vehicle's electrical system. The safest way to do that is to pick up the 12 volts right at the battery, as your installer has done.
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Old 05-11-2015, 02:24 PM
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Re: Service Start/Stop System Message after Air Force One Brake System Install

Hi Bob,

Tapping into the battery should not cause any issues, unless the system is drawing excess power. As mentioned by Array, the electrical system is complexand many circuits are monitored for proper resistance (or current draw), so an external load can trigger an error. Have someone look at the schematic for the new system and look for a way to disable it and see if the problem goes away. Then maybe you can have a switch installed that isolates the new system for normal driving.

Good Luck!
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Old 05-12-2015, 05:04 PM
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Re: Service Start/Stop System Message after Air Force One Brake System Install

Problem solved. I took the Jeep to my dealer and he found out the code was for a vacuum leak (they didn't charge me for diagnostic as I am a good customer). Had the installer recheck the vacuum line connection and found one check valve backwards and the other check valve not installed. After fixing the problem I have over 60 miles with no issues.
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