I have a MY'98 Plymouth Voyager with a 3.3. Misses, smells rich has MIL. Went to scan codes (no communication) Have power(2.5v) on serial +/-. So just for the hell of it checked continuity from pcm pins to the DLC = 2-3 Ohms. Okay, well comm lines are ok. so tested pin 67 on the PCM harness to power on the PCM fuse=75 Ohms!!! Can't be right. Any ideas??? Need some help.

 

the dlc test was .2-.3 ohms....sorry

 

now its a crank no spark

 

Make sure you are not connected to inputs or outputs of the various controller modules when you read with an Ohmmeter. The voltage supplied by the battery in the meter is enough to fry some interface circuitry. Not sure what the DLC is. Try obtaining the codes with the ignition key.
Try this link for info.
http://www.allpar.com/fix/codes.html

 

DLC=Data Link Connector. And im using a high impedence meter. I'll try the "key trick" thanks

 

Hi impedance usually pertains to the voltage scales so they do not load high impedance circuits. The ohmmeter portion can still do as I mentioned above. As far as that 75 ohms connected to pin 67, my prints for a 2000, show 67 is a driver for the automatic shutdown relay, possible you are reading thru the coil?

 

well, is there a "B+ pin" I can sheck on the harness, can't figure the no communication.

 

B+ is on C2 pin 46 and the input from the ignition switch in start and run is C1 pin 20. Did you try the Key thing for codes?

 

B+ is on C2 pin 46 and the input from the ignition switch in start and run is C1 pin 20. Did you try the Key thing for codes? Also have you tried disconnecting the battery for a few minutes and then reconnecting?

 

here's the data connector for you car maybe it uploaded if not email me jjsticks@comcast.netlet me know moe!

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