Archived Truck Dead - ECM Dead???

[R-N-R]

I replaced the VP, replaced all of the plumbing from the frame forward, added a frame mounted pusher, and changed the fuel filter last week. I filled the tank at my local truck stop this past Sat. Sunday I replaced the shocks and changed the oil. I also disconnected the batteries to reset the APPS. Test drive last night went fine, started up and drove twice. Started up and drove fine twice this morning. Leaving for lunch today, the truck started fine I turned the comp box on (nice day today) and within a couple of minutes the engine started to sputter and surge. The MIL light came on and moments later the WIF light also turned on. Seems like too many codes for just a WIF problem. HELP!



P0622 Alternator Field Improper Switching

P0753 Trans 3–4 Shift Sol/Trans Relay Circuits

P1765 Trans 12 Volt Supply Relay Control Circuit

P1693 DTC Detected In ECM Or PCM



P0238 MAP Sensor Voltage Too High

P0178 Fuel Composition Sensor Circuit Low Voltage

P1475 Aux. 5 Volt Output Too High

P0112 Intake Air Temperature Sensor Voltage Low

P0177 Water In Fuel Sensor Voltage Too Low

P0118 ECT Sensor Voltage Too High

P0237 MAP Sensor Voltage Too Low

P0563 Charging System Voltage Too Low



The trans codes I am familiar with, up until today I also had the 0126 code. I checked the ECM connections and they seem fine. Should I reseat the connectors? Did the ECM or something else die? Did I get a bad load of fuel?Or, did somebody tamper with my fuel last night, and if so would a WIF problem not show up until after a couple of short drives?



TIA

Bill

 

[johnmcdn]

From the looks of your codes the 5 volt supply in your ECM is either being shorted (wiring problem) or the 5V supply (ECM) itself is dying. I would suspect it could be a wiring problem. That is... look for bare insulation in the harness, reseat the connectors (diconnect battery first), check for moisture getting into the connectors when you reseat them. Good luck.



John

 

[R-N-R]

Thank you for the input John.



I disconnected the batts for 30 min, checked the ECM connections for the Trans Controller, and re-seated the ECM connectors. No new codes, the WIF light comes on after running for a few moments, idles okay until I touch the fuel pedal. Now, after running for a few moments, the Water Gauge pegs to hot, and of course the Check Gauges light comes on. Now I am thoroughly confused.



EDIT: WTS light stopped appearing... I just disconnected the positive batt cables. I will wait 30 min and reset the ECM. Phone support from Bob W.

 

[R-N-R]

TTT



WIF light still on, Temp still pegs hot, WTS came on the first time, but did not return. Still idles okay until I give it some fuel, then it starts the sputtering and surging.



P0563 Charging System Voltage Too Low



Has been replaced with...



P0121 Accelerator Pedal Position Sensor Signal Volts Do Not Agree w/Idle Validation Signal

P0343 Camshaft Position Sensor Circuit High Voltage



I am having one of those OH ***** afternoons... . :{

 

[AKAMAC]

PM sent... ... ...

 

[R-N-R]

Ever experienced an ECM going nuts?

#ad






Starting to feel like I am having a conversation with myself here :-laf

 

[jrobinson2]

I think the trans and alternator codes are from the PCM, whatever your problem is seems to be affecting both computers, have you checked all the grounds? Have you checked the system voltage while the truck is running?



Jared

 

[Marco]

You have codes from both the ECM & PCM. All seem to be related to voltages either high or low. Both going nuts at the same time??? I really don't think so.



http://www.dodgeram.org/tech/dsl/ECM/ecm.gif



As you can see here several sensors share the same ground. If that ground is bad... see what I mean? I'd start to check the connectors on the firewall top of the engine.



Marco

 

[R-N-R]

The PCM codes have been present ever since I added the Trans Controller in '03. Several others with the same controller have these codes as well.



I cleaned and greased conections yesterday. Is a grounding problem the kind of thing that can appear out of the blue and disable the truck? Thank you for the suggestion. Tonight I will check the grounds on the firewall.



What's up with codes and sequence changing? Another thing that I noticed is that early on several codes appeared twice within the given code viewing cycle, not necessarily in sequence.

 

[R-N-R]

Anybody have a tip on where to look for grounds on the firewall above the engine??? I am looking and I only see one small ground wire near the drivers fender.



EDIT: Disconnected Comp = No Change

EDIT: Disconnected Pusher Pump Harness = No Change

 

[TORQUE THIS]

Could it be possible you got the wrong VP-44???? Just a thought...



Did you check the grounds on the block, one by the oil filter and another up front, behind the front bumper...



The only ground I have on the firewall is a small lead from the right side of the PCM, follow it, it's on the firewall underneath the wire harness that runs along the hood weather seal.

 

[R-N-R]

Thank you TT, I found the one up front, but missed the ground near the oil filter. I will check that and the PCM lead after work today.

 

[Marco]

You mention that you've added a pusher pump. Where does the power for it come from? You do not get the power for the pusher directly from the lift pump wires?



Marco

 

[R-N-R]

Hi Marco,

I purchased a wire harness that intercepts the factory harness/LP. It has a lead that triggers a relay which supplies power to the pusher pump. The relay is powered straight from the +12v off the drivers batt and is grounded to the metal portion of the fender liner. I isolated the pusher pump relay from the factory harness and disconnected the comp box last night, did not reset the ECM again, however the symptoms did not change.



Each time I have reset the ECM, the CE light reappeared immediately, prior to starting the engine. The WIF light and Water Temp gauge pegging have taken a few moments to reappear. I am also fairly certain that were present after an ECM reset and prior to starting the engine on more than occassion. The WTS light has functioned the past couple of resets as well, however I have only started the engine a couple of times each reset. I am resetting the ECM by removing the batt cables for 30min to 3 hrs, turn the key on and reconnect the batt cables first.



Thanks for the help guys!!!

 

[TORQUE THIS]

Another thought...



Did you by chance pinch the wire for the cam position sensor when installing the VP-44?? Check the connection on the sensor also.



For the WIF light, could you have missed plugging in the 2 connections on the filter housing, or they are not making good contact???

 

[R-N-R]

Could it be possible you got the wrong VP-44???? Just a thought...

I missed this one earlier, It was tagged correctly and ran fine for 1 week.



The CPS wire harness was free and appeared fine. Can I pull the sensor without removing the VP first? Both filter connections were two of the many that I cleaned with electric parts cleaner, blew out with an air hose, and applied dielectric grease to.



I followed the ECM diagram and see exactly the reference to a shared ground. I could apply almost all of the codes to the different sensors from that trunk line.



I disconnected my batts last night, reseated several ground connections this evening, then reset the ECM again tonight. The same codes reappeared (without starting the engine), however tonight I confirmed that some of the codes were being displayed multiple times during a code check. Also, the water temp gauge went up and down slowly a few times, the codes for high and low voltages would reappear with the gauge activity. A local TDR friend stopped by and connected an Actron code reader which displayed 22 codes. Basically these included all the same codes as earlier, plus the opposite (voltage) code for each of them. It also displayed a couple of codes related to the APPS, and one significant addition was the "P0606 - ECM Internal Failure" code. I was able to clear the ECM codes with this unit, however they reappeared immediately upon the next key-on action.



I have the opportunity to use another ECM unit for testing. Naturally I am somewhat concerned about plugging in another ECM without having a clue on what happened to mine. Once again the new plumbing, VP, LP and wire harness ran fine for a week before the ECM problem. I changed the oil and shocks the day before, and ran the truck on 4 short drives before the problem. Aside from the obvious potential, what are your thoughts on this?



Much appreciation,

Bill



EDIT: Anybody ever had problems with a BC pump cover? I just realized that it is still installed, although I pulled the comp wire off of it. Another tidbit is that I had numerous loose fittings when I 1st fired up the pumps after replacing the plumbing. I had some residue under the drivers batt when I checked yesterday, however none of the connections that I inspected were wet or damp.



EDIT: Removed the BC cover = no change