TwinTurbo.NET: Nissan 300ZX forum - '94 to '96 r134a refrigerant cars
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Subject '94 to '96 r134a refrigerant cars
     
Posted by JMartz on April 13, 2017 at 9:02 AM
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Message The TCA in my car is shutting the the a/c compressor at a warmer temperature than designed. The thermisor is supposed to do so at 34 but is doing it at 44, causing insufficient cooling. The control wire of the TCA goes to pin 46 on the ECU. I removed the pin in hopes that the "early" signal to shut the compressor, would not reach the ECU; except this disabled the a/c completely.

Does anybody know what the TCA is sending the ECU? Is is a permanent ground that is interrupted, or 5v or 12v or a ground that is applied?

What does the ECU want at pin 46 to let the a/c work?

     
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