Tough Roof problem 2009 E89

[RobbiZ4]

Txs 4 the pics, pump and CTM are from week 15/16 2009 and should fit together.

[RobbiZ4]

I was thinking that one of the micro switches is giving the CTM the wrong voltage. Not a huge difference in voltage that would produce a code, but enough to cause the roof not to work. Maybe 18 mV too high or too low. I will ignore this for now and come back to it later if other solutions dont work.[/b]

AFAIK all sensor values are working just logically, not by an exact voltage. Values are LOW (0,4-0,65V) and HIGH (1,8-2,6V). This seems to be very tolerable against drifting voltages. Hallsensors can be substituted by microswitches and vice versa for test purposes - very very tolerant input ports.

[Rob E89]

AFAIK all sensor values are working just logically, not by an exact voltage. Values are LOW (0,4-0,65V) and HIGH (1,8-2,6V). This seems to be very tolerable against drifting voltages. Hallsensors can be substituted by microswitches and vice versa for test purposes - very very tolerant input ports.

I see, so there is a lot of room for error with fluctuating electrical signals.

I had to take a few days off trying to fix it because it was causing me stress. I made a video of the live sensor data while im pushing the roof open button. Does anything look out of order/strange?

https://youtu.be/8aPLpKAxYdA

I think the loud creeking noise when I push the "roof open" button is all 4 window motors pushing the windows down for half a second. When I push the window open button and the window is already open, it makes a similar noise.

[Rob E89]

Im going to buy a new CTM. The CTM on the car is : 61357206761 dated at 15th week of 2009 with SW version 4.7

From my research I understand that I need a CTM made before 03/2012 to match my 3 solenoid hydraulic pump vs the newer 4 solenoid hydraulic pump. RobbieZ4 mentioned SW Version 6.0 being the newest CTM that the 3 solenoid hydraulic pump would accept. The newer CTMs are all SW 6.7.

I saw this compatibility chart, and it makes it look like the newer CTMs have superseded the older ones (You can uses newer 4 solenoid CTM with a 3 solenoid hydraulic pump?).

CTM compatability.jpg (73.38 KiB) Viewed 165 times

I can buy a 61357206761(SW 4.7), or 61357206762(SW 5.0) (Older version) For $500
Or a 613509281723 (2013 "newer" version) for $265

Is the compatibility chart I posted incorrect? Should I get the CTM with SW 5.0?

[RobbiZ4]

Im going to buy a new CTM. The CTM on the car is : 61357206761 dated at 15th week of 2009 with SW version 4.7
[...]
RobbiZ4 mentioned SW Version 6.0 being the newest CTM that the 3 solenoid hydraulic pump would accept. The newer CTMs are all SW 6.7.

I saw this compatibility chart, and it makes it look like the newer CTMs have superseded the older ones (You can uses newer 4 solenoid CTM with a 3 solenoid hydraulic pump?).
CTM compatability.jpg

I can buy a 61357206761(SW 4.7), or 61357206762(SW 5.0) (Older version) For $500
Or a 613509281723 (2013 "newer" version) for $265

Is the compatibility chart I posted incorrect? Should I get the CTM with SW 5.0?

No and maybe yes.

...one built with a SW version up to 6.00.00 (latest version for 3 solenoids), one with the newer one up to 6.70.00 (latest version for 4 solenoids).

As written, this is the only correct info.

Your compatibility list is hardware based, but doesn't contain the different sw requirements. New CTM's from stock always expect 4 solenoids and have to be downgraded with ISTA/P for 3-solenoid-pumps (or require a dummy resistor as solenoid replacement on the green CTM plug).

[Rob E89]

Your compatibility list is hardware based, but doesn't contain the different sw requirements. New CTM's from stock always expect 4 solenoids and have to be downgraded with ISTA/P for 3-solenoid-pumps (or require a dummy resistor as solenoid replacement on the green CTM plug).

I have ISTA+ 4.32.15, Is it worth saving $250 buying the newer CTM and downgrading the SW to 6.0 or earlier, or should I buy the SW 5.0 CTM to save a headache. I notice the HW(hardware?) version changes from 2.0 to 3.0 on the newer ctm too.

Many thanks for the advice

[RobbiZ4]

ISTA/P is required for programming, another TB consuming prog.

The newer hardware contains the additional port for the 4th solenoid. Interestingly there are hw-3.0 (4 solenoids) versions with sw-6.0 (3 solenoids) available as well.

Might be easier to think about the dummy option in combination with a new CTM from stock:
1 resistor
2 short wires to place it next to the green plug
2 MQS female contacts
shrink tube

[Rob E89]

ISTA/P is required for programming, another TB consuming prog.

The newer hardware contains the additional port for the 4th solenoid. Interestingly there are hw-3.0 (4 solenoids) versions with sw-6.0 (3 solenoids) available as well.

Might be easier to think about the dummy option in combination with a new CTM from stock:
1 resistor
2 short wires to place it next to the green plug
2 MQS female contacts
shrink tube

Ok thank you for the advice. Its interesting you can get SW 6.0 on a HW 3.0 ctm! I guess they are quite similar besides the 4th solenoid control. Ill order this newer CTM now, and make the dummy.

new ctm.jpg (28.37 KiB) Viewed 82 times

Do you have a writeup anywhere how to make the 4th solenoid dummy?

[RobbiZ4]

Its interesting you can get SW 6.0 on a HW 3.0 ctm! I guess they are quite similar besides the 4th solenoid control.

Yes, that's the prerequisite for downgrading new CTM's from stock for pre-2012 E89 Z4's.

Do you have a writeup anywhere how to make the 4th solenoid dummy?

Not yet, but the following as a starter:

Might be easier to think about the dummy option in combination with a new CTM from stock:
1 resistor
2 short wires to place it next to the green plug
2 MQS female contacts
shrink tube

We've tested several resistor values and ended up to ~150 (max. 240) ohms with a power of 1W (!). 150 should be save.

Pin 6 and pin 15 on the green connector X410

Should look like this and can be pinned directly into X410.

20200606_105018_150Ohm_1W.jpg (131.22 KiB) Viewed 69 times