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So this car has this funny thing that when you turn the AC on, the fans never turn on and freon gas is spit out. We have replaced PCM, Coolant Sensor, Empty out freon/put again and checked wiring. Compressor works perfectly, ambient is showing correct temperature, inside sensor is showing correct as well, so is coolant. We checked anti-freeze and everything is working excellent. So my question is has anyone seen this problem? Everything works correctly, fans turn on when temp reaches, so car has never overheated. Just that they won't turn on when A/C is on. Anyone have any ideas??? Thanks!
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is there a data PID for the high side pressure in the engine data list ? What is the pressure reading ? -
Thanks for the response greasybob. So we rechecked the wiring and data, nothing seemed out of place. And behold! We checked the wiring to the High preassure Switch, 0 Volts. No 5V, traced it back to a broken wire. No codes is the most surprising thing, usually you would see a high circuit DTC. Nope, not this trash car. Once we fixed that wire, fans worked the second we turned on the AC. Puzzled as to why no DTC or PID showing 0V.
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Does someone have the compressor hot wired or relay bypassed ? Usually the PCM won't command the compressor on with a zero voltage reading from the sensor .Comment
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