Chrysler Repair: Automatic shut down relay problem: 2.5L V-6, obd ii reader, pulley bolt


Question
It seems that my 1998 Chrysler sebring ASD relay is not functioning and allowing voltage to get to the fuel and electrical system. there is no voltage on the 10 amp fuse. When i remove the fuse and use my circuit tester to apply voltage to the circuit it is ok. The back end of this circuit ends up in the pcm. Does this mean that the PCM is bad.  

Answer
Hi Richard,
No I don't believe there is something wrong with the PCM. You are just bypassing the ASD which is not closing when it should (when you crank the engine, and of course also when it is running). I suspect rather that one of your sensors (the crank sensor or the cam sensor) is not putting out the necessary signal to tell the PCM to close the ASD relay.
If you have an OBD-II reader you could verify that by reading the codes. You might get a read out on the odometer window of the speedo by using the ignition key: "on-off-on-off-on and leave on" doing that in 5 seconds or less. Then see if any four-digit codes show up in the odometer window. If not then you may have to borrow a reader, perhaps from an Autozone store to see if you get either a 0320 (crank) or and 0340 (cam) sensor fault signal. You can also look at the signal wire from the sensors: cam on pin 3 tan/yellow wire at the 6 pin connector at the distributor, crank on pin 3 gray/black of the crank sensor's 3 pin plug, observing for pulsing on those wires as you turn the engine over by hand (wrench on the crank shaft pulley bolt and with the ignition in the on position). Oscillation should be between 5V and 0.3V. You might want to check that when you are cranking with the starter that the ASD coil's grounding wire (pin closest to the end of the PDC box) dark blue/violet at the ASD socket is not being grounded by the PCM, which is what has to happen for the ASD relay to close. That would also verify that in all likelihood it is either the crank or cam sensor that is bad. Otherwise, if it is being grounded then the ASD itself could be bad.
Let me know what you learn and we can go from there if you don't solve this.
Roland