Chrysler Repair: 98 Chrysler Concorde: no start, digital input data, pulley bolt

Question
Hi, I have a 98 concorde.. The car had a 2.7 that threw up at 49,000.. An HO 3.5 out of a 300 was replaced.. I have owned thecar for 4 years, it has run great, approx 2 years ago, I started having gauge troubles, they were intermittent, sometimes not working for months, then suddenlythey would come up, I would put a few miles on the car,then they die off agan.. while the guages are not working, the auto door lock feature does not work.. But that is another issue, As I said through all of the guage dea the car ran great.. One day I got in and the car will not start, I have fuel pressure, but no fire, I have switched asd rlay, checked voltage to crank and cam sensor..  When i was going to do the code check with the ignition switch and check engine light.. I tried several times but I have no check engine light.. If this means PCM is crap, then I cant use a vin programmed one because of the 3.5 engine replacement.. The PCM part No is po4606830AP, if you can give me ay thoughts that would be awesome..


Answer
Hi Brian,
I would doubt it is the PCM. Besides, the check engine light is not the way to get the codes. If anything, you would want to be able to read the odometer to see if it changes from mileage to show instead the 4-digit fault code numbers after you do the ignition key 'dance'. If the dash isn't working then I would begin by removing it ang checking for loose solder joint between one of the socket pins and the circuit board (pin 5 of the green carries the digital input data, and there are ground and voltage wires on 1,2,3,6 of that socket and 2,6 of the blue socket. Try reheating all those joints with a soldering gun.
I would also verify whether you have an actual signal from the cam and crank sensors. Put a voltmeter across the other two wires of each sensor, turn the ignition switch to the 'run' position, and turn the engine by hand using a ratchet on the crank pulley bolt. The voltage should pulse between 0.3 and 5V several times per revoilution if the sensor is good. Only after that, and getting an appropriate fault code would I consider replacing the PCM.
Roland