Fuel realy does not pickup in the keyswitch "Start-Run" position; and the starter relay will not pick up in the keyswitch "Start" position. All other controls and accessories seem to work just fine (radio, lights, remote lock, headlights go off in the start position, etc). I suspect a PCM problem. The dwgs are pretty bad and hard to follow and hard to cross reference from sheet-to-sheet. The vehicle is a 2003 Dodge Caravan V6 3.3L. All the wiring harnesses look good. No codes. Problem was intermittent for a days and now permanent. WILL NOT CRANK OR START. I have power from the keyswitch to C9, Pin 2 of the IPM. Can the PCM prevent starting and prevent the fuel pump from running in ignition switch on position? The batter is fine.

Thanks very much. Clarification: This is a 2003 and I will check the asd relay next. All the control power thus far is OK at the IPM. I suspect the PCM is not pulling the ASD and Fuel Pump Relay to gnd, ie, no output from the PCM. Documentation is NOT very good on this stuff. If I had a copy of dwgs of this 2003,3.3 V6 Model, I could probably better chase the signals around in the IPM. I have the keyswitch 12V inputs at the IPM connectors in both the run-start, and start positions. PCM returns no codes. I suspect the PCM but no way to look internally at the program. What kind of device failures (inputs) to the PCM would likely cause the PCM to call for an ASD shutdown? Thanks very much. Clarification: This is a 2003 and I will check the asd relay next. All the control power thus far is OK at the IPM. I suspect the PCM is not pulling the ASD and Fuel Pump Relay to gnd, ie, no output from the PCM. Documentation is NOT very good on this stuff. If I had a copy of dwgs of this 2003,3.3 V6 Model, I could probably better chase the signals around in the IPM. I have the keyswitch 12V inputs at the IPM connectors in both the run-start, and start positions. PCM returns no codes. I suspect the PCM but no way to look internally at the program. What kind of device failures (inputs) to the PCM would likely cause the PCM to call for an ASD shutdown?

ASD does NOT pickup, even though the +12V is on the coil; the PCM is not allowing the ASD to operate. Thbe relay itself is OK. We are ordering a remanufactured PCM unless you have some more information to go on. ASD does NOT pickup, even though the +12V is on the coil; the PCM is not allowing the ASD to operate. Thbe relay itself is OK. We are ordering a remanufactured PCM unless you have some more information to go on.

Thanks, Ray. No, we did not check the crankshaft position sensor. I do not know how the crankshaft sensor would keep the starter from cranking. Maybe if the crankshaft sensor were to short out the 5V it might keep the computer from letting the ASD and Fuel Pump relay from picking up? But if the Crankshaft Position Sensor were bad, shouldn't we have seen some kind of code??? THANKS for any additional detail you can provide. Is the position sensor an absolute positioin input, or justosi Thanks, Ray. No, we did not check the crankshaft position sensor. I do not know how the crankshaft sensor would keep the starter from cranking. Maybe if the crankshaft sensor were to short out the 5V it might keep the computer from letting the ASD and Fuel Pump relay from picking up? But if the Crankshaft Position Sensor were bad, shouldn't we have seen some kind of code??? THANKS for any additional detail you can provide. Is the position sensor an absolute positioin input, or justosi

--whoops, I hit send too soon. Isn't the CPS just a pulse, or is it some kind of absolute position sensor? --whoops, I hit send too soon. Isn't the CPS just a pulse, or is it some kind of absolute position sensor?