Citroen Grand C4 Picasso 2012 MCP6 error

[ramirofiso]

The clutch release is slow during the drive, no issues when I move from N to A. The clutch was replaced by a mechanic, not me (and also he did the clutch programming several times)

[kalm007]

There is interesting. From my side the clutch was very slow when I started my car and I had to wait 3-4 sec from N to A.

During the driving. I do not know. I think there may normal thing, because this clutch is not too fast. Possibly can you take a video about the clutch process during driving.

[ramirofiso]

Yeah, I will make a video of it. But It can’t be normal, because If I use it in automatic, the clutch slip a lot between gear changes, so I have to drive it in Manual mode, and release the accelerator, change the gear, wain until the gear is engaged and the press the accelerator again..

[kalm007]

This is very interesting. and How many do you have to wait between speed changeb( for example from 3 to Video is very good because I can compare your car with my car

[ramirofiso]

If I’m in automatic mode, I have to wait around 3 seconds until the next gear is engaged. Something else to mention that will help you to understand why this is not normal: the gearbox never takes the accelerator control, if you are with the pedal fully pressed, it will never stop accelerating while it’ changing the gear, that makes slip the clutch a lot. Imagine the same situation in manual, you are not releasing the gas pedal when you are changing from 2nd to 3rd gear for example.. that’s exactly what is happening on my car..

[ramirofiso]

This is very interesting. and How many do you have to wait between speed changeb( for example from 3 to Video is very good because I can compare your car with my car

I have actually a question for you: what happens if you are deiving in automatic mode an you fully press the accelerator pedal? Does the ecu of the gearbox “cut” the gas while it is changing the gears? Because maybe what it is failing in my car is a sensor..
Thanks for your help!

[kalm007]

Yes. If I fully press accelerator pedal the car wont modify the accelerator pedal level.

Unfortunately this transmission is not the official automatic transmission. This is normal transmission with some motor and hidraulic channel. But if you can take a video about it I will check it that normal or not.

[ramirofiso]

Yes. If I fully press accelerator pedal the car wont modify the accelerator pedal level.

Unfortunately this transmission is not the official automatic transmission. This is normal transmission with some motor and hidraulic channel. But if you can take a video about it I will check it that normal or not.

Yes, got it, but I was not refering to the pedal being modified “physically” by the robot, I meant if the admision is “adjusted” electronically to avoid the car rev up when it’s changing from one gear to the next one. (Exactly like you do when you are driving a manual car, you just release the accelerator until you engage the next gear and then yo press the pedal again) I will try to do a video today, but defenitely my car is not doing that, it keeps the accelerator pressed while it is changing gears, and that makes slip the clutch..

[kalm007]

Yes, Yes I understand. I talked about this problem. If you press fully throttle there will cause this problem ,that the "clutching process" a little bit slow. But I do not understand why the clutch is slipping when you press the fully throttle.
I am very curiosity.

[ramirofiso]

Yes, Yes I understand. I talked about this problem. If you press fully throttle there will cause this problem ,that the "clutching process" a little bit slow. But I do not understand why the clutch is slipping when you press the fully throttle.
I am very curiosity.

Hi, I've recorded a video yesterday and also noticed something that I don't know if its right: When I check the parameters of the gearbox, the rpm measured by the gearbox sensor shows some rpm when I turn on the car, but then it quickly goes to 0, and shows no revs until I put the car in auto and move it. Is that behavior right?
Another conclusion is that the car behaves has it is always departing in 1st gear: It does not cut the throttle, and it release the clutch slow (just as if it was in 1st gear).
In the video https://drive.google.com/file/d/1n7FP8 ... p=drivesdkyou will se how it departs fine from 0km/h until it engages the 2nd gear. you will notice that the gear is engaged quickly, but the clutch release is veeery slow, that's why it makes the clutch slip a lot. (keep in mind that the clutch is brand new). Also you will notice that the throttle is not cut during the gear change..Any thoughts?

[kalm007]

I think the first problem is not problem.

The second problem. i checked your video. At 5 sec I heard a slipping/whistle noise. Did you mean cluch slipping here? Because if yes the noise not so good. Please check the pressure of system. You can check in the cluch/transmission menu. The normal pressure 50 bar ±2-3 bar. If there is too low the clutching process may too slow.

Please check the pressure of system with live data with chart, because you can check/see how change the pressure of system

[ramirofiso]

I can’t check the pressure live if you remember, my ecu does not allow me to see that. I’ve changed the pressure accumulator because I used to have the P0868 error code, but I that is now solved, and to be honest I dont hear the pump working a lot, it’s activated every 60 seconds or something.. to be honest I don’t know what else can I check..

[kalm007]

Yes I remember. Can you take a picture what the problem is when you would like to open the transmission menu?

[ramirofiso]

I can open the transmission menu and select a lot of different measurements, but it does not let me select the hydraulic pressure measurement. I will add a picture of the error tomorrow, but basically it says something like “your ecu does not allow to show this parameter”

[kalm007]

There is very interesting because I use same software and I could measure the pressure of system.

When you use the diagbox and you select the car from the list. Is diagbox recognise your car or not?

That is, you do not type your vin number into diagbox, it recognise your vin number.