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Re: Dodge/Ram Techs Some Help Please (Long) [Re: runnerrt] #1482470 08/13/13 02:04 PM 08/13/13 02:04 PM
Joined: Feb 2010 Posts: 1,377 Ohio Todd pro stock
Todd pro stock Joined: Feb 2010 Posts: 1,377 Ohio	Have you checked the APPS (pedal)? Can you read the voltage of the sensor with the scan tool you have? If so read the voltage of APPS sensor #2 and then disconnect and see if the voltage changes or not If it stays a 3v its possible you have a bad pedal assy.

Re: Dodge/Ram Techs Some Help Please (Long) [Re: Todd] #1482471 08/13/13 02:19 PM 08/13/13 02:19 PM
Joined: Jan 2003 Posts: 27,421 Balt. Md 3 383man Too Many Posts
383man Too Many Posts 3 Joined: Jan 2003 Posts: 27,421 Balt. Md	Todd is correct as its easy to forget about the pedal unit. It has sensors that tell the PCM what pedal posistion the driver wants and then the PCM will work the throttle body motor to move the throttle where it needs to go. The throttle body is not cheap and your best bet would be to have a shop diagnose it to be sure what it is. Not trying to be smart but you really need to know what your looking at to diagnose it right and not replace the wrong part. When I get one with alot of codes I pick one that makes the most sense and then diagnose that code which will usually get to fixing everything. I just dont want to see you replace the throttle body if your not sure thats it. Its tuff to try and diagnose over the internet. With the scan tool you can read the APP sensors and the TPS sensors to see just what is going on and you can acuate the throttle body motor to see if the PCM can comand it. Ron Last edited by 383man; 08/13/13 02:21 PM.

Re: Dodge/Ram Techs Some Help Please (Long) [Re: Todd] #1482472 08/13/13 02:24 PM 08/13/13 02:24 PM
Joined: Feb 2005 Posts: 550 Lakewood, Colorado R runnerrt OP mopar
runnerrt OP mopar R Joined: Feb 2005 Posts: 550 Lakewood, Colorado	Quote: Have you checked the APPS (pedal)? Can you read the voltage of the sensor with the scan tool you have? If so read the voltage of APPS sensor #2 and then disconnect and see if the voltage changes or not If it stays a 3v its possible you have a bad pedal assy. I can just read it and it is at 5V both APP1 and APP2 plugged in and unpluged. the scanner has a ETC learn values test and when I run that it states APP1 did not see low voltage. 1969 Super Bee High School car I got back 2004 Ram 2500

Re: Dodge/Ram Techs Some Help Please (Long) [Re: runnerrt] #1482473 08/13/13 02:30 PM 08/13/13 02:30 PM
Joined: Jan 2003 Posts: 27,421 Balt. Md 3 383man Too Many Posts
383man Too Many Posts 3 Joined: Jan 2003 Posts: 27,421 Balt. Md	What do the APP sensors read when you move the gas pedal with them hooked up as they should change. 5 volts at rest does not sound right. Ron

Re: Dodge/Ram Techs Some Help Please (Long) [Re: 383man] #1482474 08/13/13 02:55 PM 08/13/13 02:55 PM
Joined: Feb 2005 Posts: 550 Lakewood, Colorado R runnerrt OP mopar
runnerrt OP mopar R Joined: Feb 2005 Posts: 550 Lakewood, Colorado	Quote: What do the APP sensors read when you move the gas pedal with them hooked up as they should change. 5 volts at rest does not sound right. Ron 5V at rest or depressed,plugged in or not. 1969 Super Bee High School car I got back 2004 Ram 2500

Re: Dodge/Ram Techs Some Help Please (Long) [Re: 383man] #1482475 08/13/13 02:56 PM 08/13/13 02:56 PM
Joined: Feb 2010 Posts: 1,377 Ohio Todd pro stock
Todd pro stock Joined: Feb 2010 Posts: 1,377 Ohio	Quote: What do the APP sensors read when you move the gas pedal with them hooked up as they should change. 5 volts at rest does not sound right. Ron Sounds like its time for a new pedal. The voltage on sensor 1 goes in the opposite direction than sensor 2 does when the pedal is depressed.

Re: Dodge/Ram Techs Some Help Please (Long) [Re: Todd] #1482476 08/13/13 03:09 PM 08/13/13 03:09 PM
Joined: Feb 2005 Posts: 550 Lakewood, Colorado R runnerrt OP mopar
runnerrt OP mopar R Joined: Feb 2005 Posts: 550 Lakewood, Colorado	Quote: Quote: What do the APP sensors read when you move the gas pedal with them hooked up as they should change. 5 volts at rest does not sound right. Ron Sounds like its time for a new pedal. The voltage on sensor 1 goes in the opposite direction than sensor 2 does when the pedal is depressed. Could that cause IAT,ECT,Ambient,fuel sensor A all to read 5V ? 1969 Super Bee High School car I got back 2004 Ram 2500

Re: Dodge/Ram Techs Some Help Please (Long) [Re: runnerrt] #1482477 08/13/13 07:41 PM 08/13/13 07:41 PM
Joined: Feb 2010 Posts: 1,377 Ohio Todd pro stock
Todd pro stock Joined: Feb 2010 Posts: 1,377 Ohio	Quote: Quote: Quote: What do the APP sensors read when you move the gas pedal with them hooked up as they should change. 5 volts at rest does not sound right. Ron Sounds like its time for a new pedal. The voltage on sensor 1 goes in the opposite direction than sensor 2 does when the pedal is depressed. Could that cause IAT,ECT,Ambient,fuel sensor A all to read 5V ? Get out your manual and I would start with an easy sensor to get to like the IAT. Disconnect it and ground the signal return circuit. Look at the scan tool and see if the volts go to zero. If it does there is a problem with the sensor. If it stays the same, back probe the same circuit at the pcm connector with a T-pin. May have an internal problem with the PCM.

Re: Dodge/Ram Techs Some Help Please (Long) [Re: Todd] #1482478 08/13/13 08:48 PM 08/13/13 08:48 PM
Joined: Feb 2005 Posts: 550 Lakewood, Colorado R runnerrt OP mopar
runnerrt OP mopar R Joined: Feb 2005 Posts: 550 Lakewood, Colorado	I started doing the pinpoint tests for the high voltage codes and so far it looks like a PCM. I have a few more to try. Thanks for the help. Being a tech even though its Fords,I hate to send it to someone else. 1969 Super Bee High School car I got back 2004 Ram 2500

Re: Dodge/Ram Techs Some Help Please (Long) [Re: runnerrt] #1482479 08/13/13 08:56 PM 08/13/13 08:56 PM
Joined: Feb 2010 Posts: 1,377 Ohio Todd pro stock
Todd pro stock Joined: Feb 2010 Posts: 1,377 Ohio	I know what ya mean. Sometimes when you get some of these hair pullers(probably why I have none left) you have to wonder why we do this for a living.

Re: Dodge/Ram Techs Some Help Please (Long) [Re: Todd] #1482480 08/13/13 09:29 PM 08/13/13 09:29 PM
Joined: Jan 2003 Posts: 27,421 Balt. Md 3 383man Too Many Posts
383man Too Many Posts 3 Joined: Jan 2003 Posts: 27,421 Balt. Md	Quote: I know what ya mean. Sometimes when you get some of these hair pullers(probably why I have none left) you have to wonder why we do this for a living. That is so true. I always felt like us techs who do the electrical and dianosis work were way underpaid. But I did it for about 40 years. You might also make sure you have 5 volts at the 5 volt senors wires. And at the pedal assembly also as I had a broken wire do that before. None of the sensors were getting 5 volts on the #one 5 volt circuit because I had a open circuit in the 5 volt wire between the PCM and the first sensor that circuit fed. The PCM will still see 5 volts all the time since it has an open circuit on the 5 volt wire. If you dont get 5 volts at the sensors check it at the PCM and see what you get. If the 5 volt circuit was shorted the volts would show 0 even in the PCM. Ron Last edited by 383man; 08/13/13 09:31 PM.

Re: Dodge/Ram Techs Some Help Please (Long) [Re: 383man] #1482481 08/15/13 08:05 PM 08/15/13 08:05 PM
Joined: Feb 2005 Posts: 550 Lakewood, Colorado R runnerrt OP mopar
runnerrt OP mopar R Joined: Feb 2005 Posts: 550 Lakewood, Colorado	Put the new PCM in today, let the throttle body reset, and it fired right up. Overhead still reads -40 but ambient on the scanner was reading right. Do I have to reset the overhead somehow? Thanks for all the help on this. 1969 Super Bee High School car I got back 2004 Ram 2500

Re: Dodge/Ram Techs Some Help Please (Long) [Re: runnerrt] #1482482 08/15/13 08:19 PM 08/15/13 08:19 PM
Joined: Feb 2010 Posts: 1,377 Ohio Todd pro stock
Todd pro stock Joined: Feb 2010 Posts: 1,377 Ohio	Glad ya got it figured out The over head temp should update its self. Go drive it.

Re: Dodge/Ram Techs Some Help Please (Long) [Re: Todd] #1482483 08/15/13 09:03 PM 08/15/13 09:03 PM
Joined: Feb 2005 Posts: 550 Lakewood, Colorado R runnerrt OP mopar
runnerrt OP mopar R Joined: Feb 2005 Posts: 550 Lakewood, Colorado	Drive it I can do. Thanks 1969 Super Bee High School car I got back 2004 Ram 2500

Re: Dodge/Ram Techs Some Help Please (Long) [Re: runnerrt] #1482484 08/15/13 09:10 PM 08/15/13 09:10 PM
Joined: Jan 2003 Posts: 27,421 Balt. Md 3 383man Too Many Posts
383man Too Many Posts 3 Joined: Jan 2003 Posts: 27,421 Balt. Md	Good for you. Ron

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