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10-10-2011, 11:47 AM
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#2 |
 ULTIMATE
Drives: 09 5dr LB, 2x 08 3dr LB Join Date: Oct 2008
Location: USA, CT
Posts: 13,460
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The AC ECU controls the compressor clutch and if it senses an issue, such as too high or too low of refrigerant pressure, it will not activate it. The AC ECU has DTCs just like all of the other ECUs, but unfortunately there is no trick with it for getting it to flash a light to tell you the code. Its codes have to be read with a TechStream tool.
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