Sure, I just went through this with a CodeAlert system on my H2. There are some wires on my alarm that are for options not used. They are sometimes not "powered" as my installer tells me so if they are not sending a 12V signal, then the H2 computer picks it up as a problem. The "service 4WD" message is exactly what is sent on the CodeAlert's but it only occurs on remote start. If it occurs with regular key start, then this is not the problem from what my installer tells me. I don't remember the exact nature of the problem except the service 4WD message. Do you even have a alarm or remote start besides the factory one?
David
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2005 H2 Adventure, Nav, Sunroof
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