OBD-I computer not control OBD-II car's A/C system?
05-28-2011, 11:04 AM
#1
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OBD-I computer not control OBD-II car's A/C system?
1997 Firebird, converted from OBD-II to OBD-I.
After getting the car back together, took it to get an alignment and my rotors turned. While I was there I asked about the A/C. They tested my system, said it held a vacuum, and that it could be filled. Had them fill it.
They said it wouldn't turn on unless they grounded the relay, and asked if I had an aftermarket computer. Sort of.
OBD-I in there.
Is there something in the OBD-I computer that is missing to kick on the A/C relay? Or is this known, and I have to run the A/C off a toggle switch?
Thank you.
After getting the car back together, took it to get an alignment and my rotors turned. While I was there I asked about the A/C. They tested my system, said it held a vacuum, and that it could be filled. Had them fill it.
They said it wouldn't turn on unless they grounded the relay, and asked if I had an aftermarket computer. Sort of.
OBD-I in there.Is there something in the OBD-I computer that is missing to kick on the A/C relay? Or is this known, and I have to run the A/C off a toggle switch?
Thank you.
05-28-2011, 11:29 AM
#2
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Join Date: Dec 1969
Location: Little Rock, AR
Posts: 27,709
Re: OBD-I computer not control OBD-II car's A/C system?
There is no difference in a/c operation that I am aware of. Check for the presence of an a/c code. It has to be cleared (or PCM reset) to allow compressor operation.
05-28-2011, 12:59 PM
#3
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Re: OBD-I computer not control OBD-II car's A/C system?
I have this code:
71 a/c evaporator temperature sensor circuit low
That's probably it then? I ***umed I had that code because I didn't have a freon charge.
I feel dumb asking how to clear it, as long as I've been here.
71 a/c evaporator temperature sensor circuit low
That's probably it then? I ***umed I had that code because I didn't have a freon charge.
I feel dumb asking how to clear it, as long as I've been here.
05-28-2011, 01:38 PM
#4
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Join Date: Dec 1969
Location: Little Rock, AR
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Re: OBD-I computer not control OBD-II car's A/C system?
The evaporator sensor is on the evaporator coil under the dash.
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