[Dfbpurcell]

I was trying to figure out why my speedo is going 4-8km/h with the ignition on and the car off, in park, on jack stands, with 4 brand new wheel speed sensors. The car wasn't throwing any codes to indicate where to look so I decided to delve deep into the live data using Protool and I noticed the speed was being reported by the transmission and the DME but not the wheel speed sensors. I tried changing gears and noticed the "Actual Gear" Value is stuck in third and the "Target gear" value is offset for each shifter position! The transmission is able to be flashed successfully with XHP. Has anyone experienced this?


Shifting to P = Target gear: 3RD
Shifting to R = Target gear: P
Shifting to N = Target gear: R
Shifting to D = Target gear: N
Actual gear no matter what: 3RD
Wheel Speed: 2.484mls (fluctuating, that's all I recorded)
EGS error code CF2B: No message from LDM (Transmitter GWS/LDM)
AFS CE93: Message faulty (Receiver active steering. Transmitter SZL)

2006/10 built 2007 E90 335i N54 ZF6HP21

[e90yyc]

Originally Posted by Dfbpurcell

Has anyone experienced this?

[Andystobbs]

Can't help with transmission but I've seen the speedo thing before when the wrong type of wheel speed sensor is installed.

[Dfbpurcell]

Originally Posted by Andystobbs

Can't help with transmission but I've seen the speedo thing before when the wrong type of wheel speed sensor is installed.

thank you. I've already ruled that out by replacing all 4 with brand new oem and checking the live data. they all show correct wheel speed and direction when I move the wheels and nothing when the wheels aren't moving

[NZE90]

Interesting that it has a fault regarding the LDM. 335i never had an LDM. They were obsolete as of 3/2006
Edit. This is wrong. LDM was still used but only if the car had ACC 541

[Tambohamilton]

Doesn't active cruise control always use an ldm? Does it have ACC in the VO by mistake?

[NZE90]

Originally Posted by Tambohamilton

Doesn't active cruise control always use an ldm? Does it have ACC in the VO by mistake?

I was partly wrong with my previous statement. If the car has cruise control with braking function 544, the LDM was no longer used after 3/06.
If the car has active cruise control 541 it still used the LDM.

[Tambohamilton]

I'd be tempted to add ACC to the VO and default code. Then remove it and default code. Some sort of software version of 'switch it off and on again'.

But that's just a guess because I don't have any better ideas.

[Dfbpurcell]

Thanks guys, car came with 544 and has a production date of 2006-10 so it shouldn't have LDM, right? Why else could it be asking for it? I tried removing ACC from the VO and default coding the affected modules. Didn't work. No matter how many times I change the VIN and default code the DSC it still gives me these errors and initializing the steering angle sensor does nothing even though it says success. Could there be something linked to all 3 stopping the transmission, afs and dsc from communicating properly without throwing any codes?

DSC [DSC_87] | 5E59: Control module: recode
DSC [DSC_87] | 5E1F: Control module: incorrect vehicle identification number; calibration required
DSC [DSC_87] | 5E50: Steering-angle sensor: serial number; calibration required
EGS [GS19D] | CF2B: No message from longitudinal dynamics management, receiver EGS, transmitter GWS/LDM
AFS [AFS_90] | 614A: Motor position angle: not initialized
AFS [AFS_90] | CE93: Message (steering wheel angle, 0xC8) faulty, receiver active steering, transmitter SZL

(Still in the wrong gear and thinks it's driving slowly)

[Andystobbs]

Can you categorically say whether there is an LDM fitted or not?
Does the DSC vin match the car?
Does the car actually have AFS?

[NZE90]

What software are you using to change VO and coding? Are the settings correct?
I have had trouble with NCS Expert not having the correct settings. Everytime i coded something it went through ok on screen, but the changes i made wouldn't stay, similar to what you are saying.

[Dfbpurcell]

the car does have afs but it shouldn't have an ldm. the vin does match the car but it still says its wrong. i tried to code with protool and ncsexpert and it says success but doesnt actually change the settings. perhaps its because i can't cycle the ignition without pulling the battery off? there's no way to turn the power off - it's stuck with the ignition on and won't give the key back because the transmission is stuck in third and the shifter is targeting the wrong gear even though it doesn't do anything. putting it into park now targets "N/A" gear. i looked at the live data again today and noticed all 4 wheel speed sensors were going crazy. it's 100% NOT the wheel speed sensors as they are brand new oem. i think i was sold a bad dsc module. it has over half a million km on it and won't accept the "has AFS" coding option. keeps acting like i never changed anything.

[Andystobbs]

So the DSC has just been replaced?

[Tambohamilton]

So... You replaced the DSC and now getting a bunch of errors related to the DSC?

[NZE90]

Maybe put the old DSC unit back in then.

Coding settings with NCS Expert change immediately. There is no requirement to cycle the ignition.

[e90yyc]

Yeah the whole DSC replacement thing definitely belonged in the original post if not the title .

[Dfbpurcell]

Previously there was no communication to the old DSC so I replaced it. Today I confirmed the "new" DSC is either faulty or the wrong part number for the car. I can read data from it, but not write to it. I read the live data from the DSC again and all 4 (brand new oem) wheel speed sensors were going crazy. Unplugged the DSC and the car is no longer reporting an erratic wheel speed, I can actually turn it off and pull the key out, BUT there is no change with the transmission - still stuck in third, still targeting wrong gear and shifting to park returns a value of N/A instead of P.

In the past 12 months I haven't been able to find any of the part numbers that match my car on RealOEM so I tried that module which clearly isn't working properly even though the wrecker said it should. It does have over half a million km on it (recorded in the "wrong VIN" error code which won't go away even though it has the right VIN. Does anyone know what the differences are between the 50+ part numbers for the DSC modules? What can I swap in, what can I not?

2007 E90 335i RHD N54 (Prod 2006-10) VIN wbavb72040km95262

[Tambohamilton]

As far as I can tell, you want:
34516777162 (complete unit with pump)
...or...
34506777163 (DSC module only)

There are exchange part numbers that technically supersede each of those, but I'd guess the original part nos will be easier to find. What are the numbers on the original unit?

[Dfbpurcell]

Thank you. I got rid of the original unit a long time ago so I have no idea. All I have is RealOEM for reference but they have a ton of part numbers and it doesn't say what the difference is. All the modules for sale have part numbers that don't match

Originally Posted by Tambohamilton

As far as I can tell, you want:
34516777162 (complete unit with pump)
...or...
34506777163 (DSC module only)

There are exchange part numbers that technically supersede each of those, but I'd guess the original part nos will be easier to find. What are the numbers on the original unit?

[NZE90]

BM World in Auckland will probably have one from a 335i.

Also found this one being parted out on Tardme

https://www.trademe.co.nz/4040931812

[Andystobbs]

Have you got ISTA? If so let it generate a measures plan and flash then encode the DSC.

Has the DSC been flashed by you at all?

That sounds to me like a 4 cyl DSC. Post the part numbers. If so flashing won't help as it's different in hardware terms.

[Andystobbs]

I think you're getting fixated on this target gear thing.
Why would it show a target of P in P - its already there. P isn't even a gear, its a lack of gear, ditto N.