Dodge Repair Questions? Ask a Mechanic for Answers ASAP
Hi, you have a pedal position sensor problem not corrulating with the computers data.
you have an electronic throttle that uses 2 throttle position signals to identify its position to the computer for diesel delivery to the combustion system one increases in voltage and the other decrease in voltage as you press the pedal the computer looks and the increase and the dcrease on voltage on both and should be sinchronizing together.
Ok, what should I be looking for to correct this issue.
one loosing voltage and the other gaining the voltage the other sensor is dropping.
you will need to test the voltage drop and increase voltage of both sensors and this can only be done with a scanner.
either sensor is out of limits.
this can be a bad conection at the throttle also.
check the conector make sure there is no corrution on the electrical pins inside the conector.
You type faster than me, you keep answering my questions before I can type it. LOL
ok where is the sensor in the engine compartment
yes one is at the throttle in the engine compartment and the other one is at the gas pedal inside the drivers compartment it looks like a brake switch.
yes I'm familiar with the pedal end. Is the throttle in the pump?
the throttle is at the air intake
The Accelerator Pedal Position Sensor (APPS) (1) is located inside the vehicle. It is attached to the accelerator pedal assembly (3).
The Accelerator Pedal Position Sensor (APPS) provides the Engine Control Module (ECM) with two DC voltage signals which change as the position of the accelerator pedal changes. One of the DC voltage signals will be half the voltage of the other signal.
ok I havent looked at the intake that closely. can the voltage be checked with a digital meter and witch wires?
give me a minute let me see if i can find a pin out picture for you to follow.
ok will fill my coffee cup
ok this is the wiring schematic between the computer and the electronic throttle at the intake, i will send you also the conector view and its function so you can check for voltage.
is there a certain procedure ie. depress pedal while checking etc.
check the voltage between both sensors , while depresing the pedal see if
the voltage transition shown on the scan tool smooth while depressing the accelerator pedal and is the voltage from APPS 1 twice as much as the voltage from APPS 2?
this can be hard to do with a multimeter thats why i say you need a scanner to be able to see both voltages at the same time.
you will also need to mesure resistance at the sensors let me send you that also.
Just to add. last weekend I was towing my rv trailer and almost had an accident because of this, since then (having done nothing) I haven''t had any problems. It's very frustrating.
i understand the pain belive me i see this every day in here with the electronic throttle bull the factory invented in stead of staying simple with the throttle cable.
Measure the resistance of the APPS 1 supply circuit between the APPS sensor connector and the ECM connector.
ok thanks. I have two meters. The scanner you refer to is the dodge one that costs about $5000??
we can do with two meters is ok.
For $5000 I could probably have the dealer figure it out
make sure the resistance less than 10 ohms?
Cool, all great info so far. do you know if I can print this conversation?
if there is hi resistance then you have a wiring problem.
wouldn't surprise me I've had to repair the dr side pass door harness before
very good some knollege is always welcome it makes my job easier, and as i see you know what you are doing .
I hope I find a bad wire. I have replaced the pedal 3 times trying to keep the truck drivable
if the resistance is ok, then follow the next step
Measure the resistance between the APPS 1 signal circuit at the sensor connector and battery negative.
okThe dealer seems to just want to replace the pedal again rather than find the cause
thats just gessing and that can be expensive unless its warrenty then who cares right?
thats call a shot gun repair .
going back on the last info.Measure the resistance between the APPS 1 signal circuit at the sensor connector and battery negative.
Yeah, thats the problem. I can't afford to pay the dealer to diagnose this. I spent $600 last month and still have the issue
it should be not greater than 100 K ohms.
Great this is the kind of info I've been looking for. It's fine to check wires but if you don't know limits you could miss the problem
let me know what you find ,if no problems found with the sensors and wiring then replace the electronic throttle.
Is there a way I can get back to you?
yes just save the page and open it again when you have resolts i will leave the question open.
yes it is , they may not have an electronic throttle as yours does, there are no TSB from the factory stating any fix to this problem, they do have a flash programing to the electronic throttle but they will not disclose the procedure this is something you will need to ask them as you bye the part. make sure the connector is fully seated and secure, make sure your battery is in good condition check the battery terminal wire for a good ground to the engine, make sure the alternator is charging well, this are all the posible points that may affect pps#1 and #2 operation and duration.
no you have the remove the heater box out and the evaporator is there sorry you have to evacuate.