"Oil change due" warning reset. - JeepForum.com
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post #1 of 19 Old 10-17-2020, 07:53 AM Thread Starter
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"Oil change due" warning reset.

I have a UK 2011 WK2 3.0 CRD Limited. I did an oil change a bit before it was actually due, and about 1 week after doing the change, the "Oil Change Due" message popped up on the dashboard. I have followed the information in the hand book on how to reset the message.

e.g. Press start button twice, press accelerator 3 times, press start button again., but this does not reset the message. I have tried it so many times, door open, door shut, wait until the light check function has completed, wait until the actual message appears, but nothing seems to clear it.

I looked online for some clues, and found a few videos that showed how to do it, all exactly as I was doing it (let's face it, it's not exactly hard), then came across this video on Youtube.


Now I am a bit confused, as my cars own handbook says it can be done, but I am seeing what this guy says. Anyone else seen this, is it true?


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post #2 of 19 Old 10-17-2020, 08:39 AM
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The accelerator needs to be pressed and released slowly on my 2011 for it to reset. .

I just got lost in thought. It was unfamiliar territory;
Current: 2011 Grand Cherokee Overland V8, 2009 Liberty Rocky Mt V6
Previous: 2000 Grand Cherokee Laredo I6, 1979 CJ7 I6 Quadratrac
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post #3 of 19 Old 10-17-2020, 09:11 AM Thread Starter
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Quote:
Originally Posted by ColdCase View Post
The accelerator needs to be pressed and released slowly on my 2011 for it to reset. .

How Slowly? I tried taking about 2 seconds to press it down, and then 2 seconds to lift it back up.


In my manual, it says I have 10secs to do it, but it does not say if that 10 seconds is from the press of the start button, from when all the check lights go out, or from the first press of the accelerator.

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post #4 of 19 Old 10-17-2020, 10:02 AM
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I turn the ignition switch to on but do not start (foot off the brake). Then I fully depress the pedal and release slowly three times. It takes me 1-2 seconds to fully depress, hold a second, 1-2 seconds to release hold for a second repeat. Then I turn the ignition to Off.

I think when the oil change advisory is not active, its hit or miss.

Most OBD scanners will reset the oil change indicator.

I just got lost in thought. It was unfamiliar territory;
Current: 2011 Grand Cherokee Overland V8, 2009 Liberty Rocky Mt V6
Previous: 2000 Grand Cherokee Laredo I6, 1979 CJ7 I6 Quadratrac
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post #5 of 19 Old 10-17-2020, 10:47 AM Thread Starter
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Quote:
Originally Posted by ColdCase View Post
I turn the ignition switch to on but do not start (foot off the brake). Then I fully depress the pedal and release slowly three times. It takes me 1-2 seconds to fully depress, hold a second, 1-2 seconds to release hold for a second repeat. Then I turn the ignition to Off.

I think when the oil change advisory is not active, its hit or miss.

Most OBD scanners will reset the oil change indicator.

Thanks for the help.



Tried it again (several times), just like you said, but nope, still won't clear.


I have Blue Driver, and InCarDoc Pro scanner software, neither of which will reset it. I did a full download, and full reset, but it's still on.


Any clues as to what ODB scanner does specifically do it.

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Red over Silver 2001 LWB Terrano 2.7TDi SE+
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post #6 of 19 Old 10-17-2020, 12:43 PM
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post #7 of 19 Old 10-18-2020, 09:42 AM Thread Starter
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I wonder if anyone could put an OBD reader on their WK2, and look at what the "Accelerator Pedal Position D (%)" reads on their car in the off and full on positions.


I am wondering if the reason my oil message won't clear is because mine only goes from 8.6% foot of the accelerator, to 88.6% with my foot hard down. I have checked and there is nothing stopping the pedal going any further. I wonder if there is a problem with the pedal.


Thanks

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post #8 of 19 Old 10-18-2020, 11:12 AM
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That sounds likely. In my 2017 it's just 3 presses and done. Not quickly slamming it down and off, but no delays either. My WK was the same. You may have to replace it.

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post #9 of 19 Old 10-18-2020, 11:28 AM
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There are two pedal position sensors, and the PCM compares their values. When one is different than the other it will throw a code.

They could be out of calibration, there is a PCM relearn procedure (ETC Learn) a test set can initiate.

Each sensor's voltage should go from about 0.45 volt to 4.6 smoothly across the range from release to full press. You can see the voltage with a scan tool, otherwise you will need to probe one of the sensor signal wires.
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I just got lost in thought. It was unfamiliar territory;
Current: 2011 Grand Cherokee Overland V8, 2009 Liberty Rocky Mt V6
Previous: 2000 Grand Cherokee Laredo I6, 1979 CJ7 I6 Quadratrac
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post #10 of 19 Old 10-18-2020, 11:30 AM Thread Starter
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Quote:
Originally Posted by Fast55 View Post
That sounds likely. In my 2017 it's just 3 presses and done. Not quickly slamming it down and off, but no delays either. My WK was the same. You may have to replace it.

Cheers, I just took the pedal out, and gave it a look over.


Seems fine to look at, no cracks or marks, so to speak.



I sprayed contact cleaner on the contacts and the plug, then put it all back together. It's still at 8.6% min, but went up to 92% max.


Just trying to find if there is any way to actually diagnose the pedal, but that's not looking so easy to find so far.

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post #11 of 19 Old 10-18-2020, 11:40 AM
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Wait, posted too soon, one sensor is ~0 to 5v, the other ~ 0 to 2.5 V

The Electronic Throttle Control (ETC) system uses two Accelerator Pedal Position (APP) Sensors to monitor the accelerator pedal position. The APP Sensors 1 and 2 are integrated into one assembly located at the pedal assembly. Each sensor has a 5-volt reference circuit, a low reference circuit, and a signal circuit. The Powertrain Control Module (PCM) reads the two signals individually and then compares the two signals as a redundant check of the throttle position. One of the sensors will fluctuate between 0 volts and 5.0 volts and the other sensor will fluctuate between 0 volts and 2.5 volts. The fluctuation of the two sensors should move proportionately. E.G. When operating properly, the voltage reading of the sensor operating on the 5.0 volt scale will always approximately two time the voltage reading of the sensor on the 2.5 volts scale.

You mat be able to measure the resistance between signal and ground with the pedal out, but I don't have the values handy. The sensors are just independent potentiometers.

I just got lost in thought. It was unfamiliar territory;
Current: 2011 Grand Cherokee Overland V8, 2009 Liberty Rocky Mt V6
Previous: 2000 Grand Cherokee Laredo I6, 1979 CJ7 I6 Quadratrac
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post #12 of 19 Old 10-18-2020, 11:44 AM
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With the pedal out, you could put a 5VDC supply across the sensor and measure at the signal voltage as you move the pedal....

I just got lost in thought. It was unfamiliar territory;
Current: 2011 Grand Cherokee Overland V8, 2009 Liberty Rocky Mt V6
Previous: 2000 Grand Cherokee Laredo I6, 1979 CJ7 I6 Quadratrac
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post #13 of 19 Old 10-18-2020, 11:53 AM
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I think you may need to run the relearn procedure (ETC Learn) to calibrate the sensors to the PCM in order to get 0 to 100%, assuming the scale is consistent.

I just got lost in thought. It was unfamiliar territory;
Current: 2011 Grand Cherokee Overland V8, 2009 Liberty Rocky Mt V6
Previous: 2000 Grand Cherokee Laredo I6, 1979 CJ7 I6 Quadratrac
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post #14 of 19 Old 10-18-2020, 01:19 PM Thread Starter
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Quote:
Originally Posted by ColdCase View Post
I think you may need to run the relearn procedure (ETC Learn) to calibrate the sensors to the PCM in order to get 0 to 100%, assuming the scale is consistent.

Thank you for your help, I have put it all back for now, but it is nice and easy to remove. I had the OBD running, and the output of both sensors is nice and linier when pressing the pedal, although one has a definite lag, which I am guessing is the software reading then displaying it.


I take it, the ETC Learn, is something I need a better diag software for, or is it something only a dealer can do?


Do you know of any software that will allow me to reset the oil message?

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post #15 of 19 Old 10-19-2020, 11:02 AM Thread Starter
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Well, this is a bit weird, I sent an Email the AppCar to ask if their software could reset it, and got a very interesting and helpful reply.


Quote:
Hello,

for diesel you should use a different procedure. The throttle procedure is for gasoline engines

This should help, the way depends on the engine type:
http://www.wk2jeeps.com/wk2_oil_indicator.htm

"C. Vehicles with diesel engines (export models):

1. Cycle the ignition to the "ON/RUN" position (Do not start the engine).
2. Fully depress the accelerator pedal and keep it fully depressed for at least 30 seconds.
3. Press and release the brake pedal six times while holding the accelerator pedal pressed.
4. Perform one ignition OFF-ON cycle, start the engine and verify that the reminder has been reset.

Repeat the process if the indicator does not reset."

Tried it, and it worked first time.


Hope that helps anyone else, and a big thank you to AppCar for helping me.

Green 2011Grand Cherokee 3.0 CDR Limited WR2
Red over Silver 2001 LWB Terrano 2.7TDi SE+
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