I have a 2000 rodeo, My A/C works, but causes the check engine light to come on. I have narrowed it down to a wire that goes from the pcm to the inside of the cab, I do believe it runs up to something like the fan control. The wire has no voltage ever, the a/c works with or without the wire. I have noticed that the a/c compressor will not dissengage when the fan/system is truned to off. Witch makes believe this is the function of that wire??
Optional Information:
2000
Isuzu Rodeo 6