[platii]

Hi,
I just purchased a donor EURO M5 for my E30 M3 S85 project with starting inhibited, it has SMG malfunction red COG sign.
The engine will start in a limp mode with one of the SMG ECU connector disconnected.
the transmission stick moves but always at N and doesn't change to 1st to drive or any other
position. No one knows what the previous owner did to the car before selling it to the guy I purchased the car from.
I scanned her with ISTA+ with everything connected and showed those errors attached.
My Main Concern is these Errors:
9501 : SZL: Steering-angle sensor not adjusted.
94C1 : SZL: Coding-data error.
4F66 : SMG: Learning not run (Gearbox, longitudinal accelerator sensor).
4F67 : SMG: Learning not run (Clutch valve values, Clutch slipping point).
5007 : SMG: Rocker switch, Negative.
5E43 : DSC: Steering angle sensor: Adjustment.
when I scanned the car with SMG connector disconnected and engine started i get 7 error more related to SMG ECU and only one error related to engine which is
2713 : Air-mass flow sensor, Bank 2.
I will get the car by Tuesday, so i want you guys to set a plan for a diagnose.
When I put all the errors together i feel it is a coding/programming issue
more than a hardware failure. The car was sitting long time and possible battery weakness.

 

[platii]

Car will be here in 10 hour.

 

[platii]

The car is not driveable, the engine will not crank.
I found these errors when I first meet the car and the guy who wants to sell it.
The car will arrive soon.
now all my thinking is the SMG package would stop it from running.
i dont see any hard fault in the SMG, and not sure if learning process would stop
the engine from cranking!!.

 

[platii]

Im taking a guess here but Have you tried changing the Smg relays?

not yet.

 

[platii]

Car is here guys, troubleshooting commenced.
Good news I heard the SMG pump runs smoothly after hooking up battery stabilizer set at 13.5V, but still car doesn't run.
will do full IsTA+ full scan to see whats going on.

 

[platii]

Triggered the SMG HYD pump with ISTA+ and it shows 3.5 bar. when stopped the reading is 1 bar.
the lever is locked by the system and the light is off on the shifter.
the cluster display N position.
i tried to engage gears with ISTA+ but it says gear is engaged for each selection i choose.
I will continue and report back with pictures.

 

[platii]

yes 3.5 bar. Confirmed motor runs pump run but low pressure. Based on the extensive reading in this forum
the best choice is to replace the motor and may be the pump internal seal.
Does the MLReng kit has the O-rings for the SMG directional control valve PN/ 23017845630, does tis valve control hyd press. in somehow.
My plan now is to inspect and evaluate the conditions:
1- check the SMG pump oil tank and quantity ( i hope it is not empty or the pump is gone).
2- remove the motor and disassemble and check the integrity of the brush ( is it possible to test the motor output)
Then I will give it another test and see what is the outcome before ordering the motor.
in fact the sound of the hyd pump is really smooth but you can notice the struggling to build the required pressure as it runs 15 second four times before giving up.

 

[platii]

Flacoramos, thats what I think too,and it sounds just like in the video, the only difference is that gradual low pitch when the the pressure reach the set value.
I jacked up the car and will check and fill if required, then will run the pump again
and check if pressure improved.

 

[platii]

I managed to start the car with SMG ECU fully connected.
Shifter unlocked and N illuminated.
I found the SMG pump tank almost empty, I poured maybe about 800 ml of oil, now i have full pressure 108-89 bar.
accumulator is good holding the pressure of 58 when i test it bleed to the specified 44 bar.
so confirmed i have good motor good accumulator and good pump.
I am half way solving this problem.
1- Complete transmission teach-in failed( gear 1 and R not engaging).
2- Actuator block ventilation failed.
Tests that I manged to complete:
1- Clutch slave cylinder ventilation.
2- Clutch Valve characteristic value. (fault 4F67 eliminated).
3- Clutch slipping point teach-in. (fault 4F67 eliminated).
4- longitudinal acceleration sensor teach-in. (fault 4F67 partially eliminated,I think the transmission teach-in has to be completed to fully eliminate this fault).
Note: These test passed when I chose transmission control sub menue but earlier failed under other sub menu, for example, clutch replacing sub menu.
5- Position gearshift rods in center position. (This one give me a feeling that the transmission is not internally damaged when 1 gear and R gear didn't engage, so i think the problem is in the control which is the shift valve on the top of the transmission).
Summary:
1- Actuator block ventilation fail.
2- 1 gear and R gear not engaging.
3- 4F80: Gearbox fault showed at the last error reading.
4- 4F82: SMG: Engage 1/R gear not possible fault showed at the last error reading.

The good thing is based on the sevice buletin SI B23 03 08 revision http://www.m5board.com/vbulletin/at...al-docs-thread-one-stop-shop-si-b23-03-08.pdf
which state that blocked gear (4F82- Gearbox blocked I/R in my case) related to software problem only if the integration is E060-08-09-510 or lower, and not sure if my beast fall within this range.
I really dont want to miss with programming the whole car as the recall solution, but I think it worth a try.
what do you guys think, or just reflash the SMG ECU alone .

 

[platii]

Falcoramos, you meant to bleed the actuator block.

 

[platii]

should i bleed clutch 3 times in arrow then move to actuator block and do it three times in arrow?

 

[platii]

Don't try an loosen the bleed screw in the block under pressure, just at the start. If the pump builds pressure just move on to the clutch bleed with the software. Make sure you have plenty of power.

I already have adequate pressure, i am in the bleeding process. The clutch bleeding pass but the actuator block failed.

 

[platii]

Good call on having proper charger or 12V supply hooked up. These cars draw A LOT of power (20-30A easy) with ignition on.

I do have a stabilizer with 120 A but i noticed that the battery still drain charge after i stopped the procedures earlier. Which means the stabilizer didn't charge the battery, may be it is not suppose to, I have no idea.

 

[platii]

I also think that there is something doesnt sleep when i lock the car over night, something is draining the battery, i will investigate that later. I do have other things to check in the list but after this major issue

 

[platii]

I tried to bleed the actuator block and clutch slave 3,4,5,6,7,8,9,etc. still the block didn't bleed, i get the error in the picture attached. I did bleed the slave cylinder and the clutch valve value over written and stored in the SMG ECU.
I am aiming to use DIS V57 to trigger the actuator block bleeding and repeat the whole adaptation process with it.
I am still convinced it is software manipulation and voltage.

So you did the clutch bleed with no problems, then you ran the actuator test and it failed. Have you tried running adaptations? What kind of pressure do you have? Set on S4 you should see cycle pressures of 50-70bar.

yes the clutch cylinder bled with no problem when i filled up the nearly empty tank with Pentosin 11S and the pump started to have real good pressure 108 bar then 89 bar within this range.

 

[platii]

Gemtegear, 120A is the capacity of the machine. I am putting 12.55V and the amp modulate from 1-35.
I am going to raise voltage to 13.8V during the DISv57 component triggering, bleeding and adaptation, as you know the
block bleeding is 15 minute set time and that may require strong voltage and current for the pump motor and other components to keep operating during the bleeding process. I never did this kind of complexity diagnosis before with ISTA+, INPA, never used DIS before, but my head is telling me DIS may do something difference as it was the main diagnosis system when the car released.

 

[platii]

Might want to check the wiring insulation on the gear shift fork position sensor array.

I would do that for sure only if i had to drop the box, I dont really want to get to that stage because i have no interest in the SMG for my project when I finish preparing for the E30 M3 S85 transplant. I am a manual transmission guy, so i dont want to spend on this box. But have to get the car running until the day comes at least to know and learn more about the system, engine to help preparation for my project.

 

[platii]

The machine is Chinese crap , it does drop 0.5V at the clamp, i'm getting 13.40V, it is MST-90+.
Ok I managed to bleed the actuator with DIS v57, I am gonna bleed it 2 more times as Falcoramos suggested and see if it shifts to 1st and reverse R, it didn't shift when i bled it the first time and still failing the complete transmission teach-in step because the engagement problem. I did also noticeed when raised voltage some flickring and arching noises during 1st and R gear selection during complete transmission teach-in or adaptation when the SMG ECU tried to adjust the mid-position of shift range for those specific gears, it timed out and failed on 1st gear and R gear. I think the signal is not going to the 1/R shifter valve due to wiring frayed as almost evryone know about this design issue, otherwise the box is toasted internally and the pressure is not able to pull the shift shaft for 1st or R gears.

 

[platii]

Right. I am putting that into consideration. I never programmed an ECU, but this i think i am gonna do it for this car if everything failed before dropping the transmission. Not sure what version should I program the SMG ECU.

 

[platii]

DIS will not program only diagnostic, progman will do the programming or other platform like NCS and Winkfp.