Operation CHARM: Car repair manuals for everyone.

IA7 Compressor Cool Down



^ The air compressor has an internal thermal non-cycling circuit breaker in it that opens the B+ power supply to the air compressor armature when the internal temperature exceeds a predetermined limit. In order for this thermal circuit breaker to be reset the following two things must happen:

1) The internal temperature must drop below the predetermined limit.

2) The power to the compressor must be off.

^ In this part of the test, allow the compressor to cool down for 15 minutes. The air compressor thermal circuit breaker may have been tripped by repeatedly running diagnostic checks.

^ Has at least 15 minutes elapsed since air compressor was disconnected from vehicle wiring harness?

YES -- GO to IA8.

NO -- CONTINUE with Step IA7 until 15 minutes has elapsed.