R50/53 A/C issue
#1
A/C issue
Well, my Mini build is almost done. Started off with a 2002 R53 with a blown motor, swapped it with a low miles engine. Did all of the stuff I needed to do while I had it apart; new water pump, single mass clutch kit, new hoses, belts, gaskets. New brakes and rotors, tires. Other stuff. It cranked right up, runs and drives great, but there's a strange air conditioning issue.
The compressor won't come on, and it appears that there is no signal coming out of the ECU telling it to work. The way I understand it (coming from my mechanic), the ECU will give a ground to complete the circuit and the compressor will run. If we ground it manually, it runs, and blows cold air. The A/C controls are working right, there is just no signal from the ECU to turn the compressor on. It's a little hot in Alabama during the summer to run around with no A/C.
I know nothing is wrong on the A/C side of things, so it must be electrical or electronic. Haven't had a chance to get it plugged into a diagnostic scanner; the only place in town that has one couldn't get to it on Friday, and won't be back until Tuesday. In the meantime, I thought I'd throw the problem up here in case someone has a "Oh, yeah, I know what your problem is" kinda answer. Any guidance will be greatly appreciated.
The compressor won't come on, and it appears that there is no signal coming out of the ECU telling it to work. The way I understand it (coming from my mechanic), the ECU will give a ground to complete the circuit and the compressor will run. If we ground it manually, it runs, and blows cold air. The A/C controls are working right, there is just no signal from the ECU to turn the compressor on. It's a little hot in Alabama during the summer to run around with no A/C.
I know nothing is wrong on the A/C side of things, so it must be electrical or electronic. Haven't had a chance to get it plugged into a diagnostic scanner; the only place in town that has one couldn't get to it on Friday, and won't be back until Tuesday. In the meantime, I thought I'd throw the problem up here in case someone has a "Oh, yeah, I know what your problem is" kinda answer. Any guidance will be greatly appreciated.
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cub4bearindiana
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06-30-2016 06:11 AM