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1999 jeep cherokee 4.0 6cyl. I hooked up my snap on mt2500 with a 1996 thru 2001 primary cartridge. I dont have any personality keys for it yet but I have one on the way. But in generic obd2 Im capable of engine data and dtcs with out keys. I know because I tried it on a 2001 dodge durango and a 2003 ford torus. But the issue Im having is with the 1999 jeep cherokee. Its saying “appendix b” which according to the jeep reference manuel stands for vehicle does not communicate with scanner or enter self diagnostic state. my brother had it at school and was saying that hes been having a hard time reading it with a newer snap on scanner. Ideas?
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Is your cigarette lighter working? many vehicles have the “auxiliary power port” sharing a fuse with the OBD port. If the fuse is blown there won’t be any communication. There may also be a dedicated fuse to look for.
I’ll check for a fuse. As to my knowledge the dome light and the obd share a fuse. I’ll check the cigarette lighter for signs of life. I’ll heck the fuses cause even if a fuse is good doesn’t mean it’s the issue or so I’ve learned
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