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Re: Dodge/Ram Techs Some Help Please (Long)
[Re: Todd]
#1482471
08/13/13 02:19 PM
08/13/13 02:19 PM
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Joined: Jan 2003
Posts: 27,421 Balt. Md
383man
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 27,421
Balt. Md
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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.
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Re: Dodge/Ram Techs Some Help Please (Long)
[Re: 383man]
#1482475
08/13/13 02:56 PM
08/13/13 02:56 PM
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Joined: Feb 2010
Posts: 1,377 Ohio
Todd
pro stock
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pro stock
Joined: Feb 2010
Posts: 1,377
Ohio
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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.
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Re: Dodge/Ram Techs Some Help Please (Long)
[Re: runnerrt]
#1482477
08/13/13 07:41 PM
08/13/13 07:41 PM
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Joined: Feb 2010
Posts: 1,377 Ohio
Todd
pro stock
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pro stock
Joined: Feb 2010
Posts: 1,377
Ohio
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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.
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Re: Dodge/Ram Techs Some Help Please (Long)
[Re: Todd]
#1482478
08/13/13 08:48 PM
08/13/13 08:48 PM
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Joined: Feb 2005
Posts: 550 Lakewood, Colorado
runnerrt
OP
mopar
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OP
mopar
Joined: Feb 2005
Posts: 550
Lakewood, Colorado
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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
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Re: Dodge/Ram Techs Some Help Please (Long)
[Re: 383man]
#1482481
08/15/13 08:05 PM
08/15/13 08:05 PM
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Joined: Feb 2005
Posts: 550 Lakewood, Colorado
runnerrt
OP
mopar
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OP
mopar
Joined: Feb 2005
Posts: 550
Lakewood, Colorado
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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
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Re: Dodge/Ram Techs Some Help Please (Long)
[Re: Todd]
#1482483
08/15/13 09:03 PM
08/15/13 09:03 PM
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Joined: Feb 2005
Posts: 550 Lakewood, Colorado
runnerrt
OP
mopar
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OP
mopar
Joined: Feb 2005
Posts: 550
Lakewood, Colorado
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Drive it I can do. Thanks
1969 Super Bee High School car I got back
2004 Ram 2500
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