Question about 2001 Chrysler PT Cruiser
If you look at the sensor it will have a vacuum hose to it and yes 3 wires, they are reference, ground and signal output Do not replace the sensor just because there is a code, that code means a problem with the system itself, it can be the sensor, the wiring the PCM, test first, replace parts only then, MAP sensors are expensive and it may no cure the problem.
Posted on Aug 04, 2008
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Posted on Jan 02, 2017
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How to Check? The MAP has three electrical
pins, one for 12 volts (or 5 volts) reference, one for ground and the third
(the middle one generally) is the 'signal' output. Put a voltmeter positive connector on the 'signal'
pin of the connected socket (back probe by inserting a bit of wire). Apply suction to the vacuum input, even
sucking on it with your mouth, should result in a measurable voltage output. At normal air pressure (open throttle) the
voltage seen should be 0 volts. As
vacuum is applied the voltage output should change to about 5 volts (throttle
closed at idle). If no transition seen
the MAP is faulty.
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