Hi,
I already own a Trinity that is working with my 2011 Dodge Challenger R/T.
Also, I own a 2011 Grand Cherokee 5.7l.
Sometime, very rarely and aleatory, the SERV4WD message appears.
And it disappears for a while as soon as I turn the engine off.
Can I use my Trinity to disgnose this trouble, when the message is displayed?