The Z3 Diagnostics Thread: Instructions, Experiences, Discussions, Experimentation

[MiddleSeat]

When I try to connect to "DSC E46" under E36/Chassis/ABS, i get the message "NO RESPONSE from the control unit" (instead of the message "COMMAND NOT ACCEPTED..." when connecting to the other ABS/DSC scripts.) What is puzzling, though, is the "engine check" light came on a month or so before the ABS/DSC lights, and also, the engine check light turns off as soon as I clear the error memory (and consistently comes back on after driving the car for 30 miles), but the ABS/DSC do not blink (remain on all the time.) I have checked all ABS/DSC fuses (except for the dreaded fuse 48 which seems to be cleverly buried in the bundle of wires under the dash) and they seem OK but if you think the "Vehicle Speed Sensor Fault" reading is likely a red herring and the problem is the ABS module with bad solder joints, I'll contact the Module Masters to see if they accept this model for repair.

Thanks again for all your help and providing the clues for this puzzle !

[328 Power 04]

but if you think the "Vehicle Speed Sensor Fault" reading is likely a red herring and the problem is the ABS module with bad solder joints, I'll contact the Module Masters to see if they accept this model for repair.

Thanks again for all your help and providing the clues for this puzzle !

It's not a red herring... and not a Vehicle speed sensor fault.
What I am trying to say is that the DME (engine control module) is looking from the usual speed signal from the DSC module (used for traction control calculations for actuating the throttle body appropriately). A dead DSC module cannot give the DME this signal... so the DME gives you a check engine code. I cannot be any clearer on this.

You also have an implausible brake light switch signal... so that's the distractor, which involves putting a new brake light switch in (at your brake pedal).

[rf900rkw]

I believe this version uses a cooked signal from the ABS module as the DME VSS input rather than the cluster and diff sensor. Getting a working ABS system is the next step.

[MiddleSeat]

Thanks for the (double) clarification; it looks like the next step is to have the ABS unit fixed and, with any luck, that would clear the engine check as well as ABS + DSC lights. Thanks also for the reminder about the brake light switch. The 3 brake lights are seemingly functioning as expected but I do understand that a transient disconnect can throw the flag so replacing the brake pedal switch at the same time that the driver seat wire connectors are being cleaned would hopefully prevent a recurrence of the fault.

Appreciate all the handholding !

[rf900rkw]

The brake switch is actually two switches in one housing. The main switch, the one that drives the lights, is pretty stout. It's the light redundancy check switch that fails.

[tazmantic]

Well let me start by saying Hi as I'm new here as a poster though Ive been in the background a little while and may I say its a great forum..

I found this thread as I was after help wit a DSC fault and I had tried a cable before but could not get it to work so sent it back and this week bought a 310+ which helped but after reading this amazing wright up I bought a new cable and have it working fine thank you so much for this thread.

Well onto my problem, think I need to say that due to various problems my Z3 is hardly used and been stored for many years, and has got very wet insid due to condensation etc but is now dry. The fault first arose several years back when the DSC and Hydraulic amber light came on after the battery went flat, I did the turn steering wheel trick and it reset, well this happened a couple of times then abote 2 years ago I thought Id start using it, got it MOTd and all was fine then the battery went flat again and this time when the lights came on it would not reset......

Well Ive finally go to looking for the fault (got the fault code readers etc) and I have 2 errors......

5E30 lateral acceleration Sensor electrical failure
5E1E CAN Timeout LWS

Ive looked at the live values and the lateral acceleration Sensor shows approx 1 (full scale right, if disconnected it goes full scale left) but if you move the sensor the value do move and if you turn it 90 degres and put it with the cable up it shows approx 0 and the fault clears??????

The steering angle sensor shows 960 if connected or not and the scale does not move.

so are these 2 sensors faulty? could they fail like this? or is it the DSC......... Ive tried to calibrate but I can only find the command via tool32 for the lateral acceleration Sensor and it fails there dose not appear to be one for the steering angle sensor as mine is the DSC MK60.

hope this makes sense and any help would be great...Thanks

[328 Power 04]

Well let me start by saying Hi as I'm new here as a poster though Ive been in the background a little while and may I say its a great forum..

I found this thread as I was after help wit a DSC fault and I had tried a cable before but could not get it to work so sent it back and this week bought a 310+ which helped but after reading this amazing wright up I bought a new cable and have it working fine thank you so much for this thread.

Well onto my problem, think I need to say that due to various problems my Z3 is hardly used and been stored for many years, and has got very wet insid due to condensation etc but is now dry. The fault first arose several years back when the DSC and Hydraulic amber light came on after the battery went flat, I did the turn steering wheel trick and it reset, well this happened a couple of times then abote 2 years ago I thought Id start using it, got it MOTd and all was fine then the battery went flat again and this time when the lights came on it would not reset......

Well Ive finally go to looking for the fault (got the fault code readers etc) and I have 2 errors......

5E30 lateral acceleration Sensor electrical failure
5E1E CAN Timeout LWS

Ive looked at the live values and the lateral acceleration Sensor shows approx 1 (full scale right, if disconnected it goes full scale left) but if you move the sensor the value do move and if you turn it 90 degres and put it with the cable up it shows approx 0 and the fault clears??????

The steering angle sensor shows 960 if connected or not and the scale does not move.

so are these 2 sensors faulty? could they fail like this? or is it the DSC......... Ive tried to calibrate but I can only find the command via tool32 for the lateral acceleration Sensor and it fails there dose not appear to be one for the steering angle sensor as mine is the DSC MK60.

hope this makes sense and any help would be great...Thanks

This is for an S54 Z3M?


If the lateral acceleration sensor will not calibrate after multiple tries on flat surface, then I would look into getting a replacement, and trying to calibrate that one. (Is yours the right part number? There are many on different BMW chassis that are mounted at 90 degrees instead at 0. You must have the correct one in, do not retrofit different part numbers.)


Steering angle sensor gets calibrated with "lenkwinkel_dsc_abgleichen", but yours may in fact be dead.

Usually when you replace the steering angle sensor, you have to code the DSC unit (using NCS Expert, and stock coding values, job "SG_Codieren") to get the steering angle sensor ID to be referenced in the DSC module. Then you can calibrate it as well.

[tazmantic]

No sorry the M54 Z3 3.0 sport

My lateral acceleration sensor is the original item so expext it to be correct just odd how if I tilt it through 90 it seems to work ok and ok thanks I might try calibrating the steering sensor tomorrow but as its giving can timeout expect its dead...... So if I replace the steering sensor I need to code it??

Many thanks its really appreciated

Also for calibrating lateral acceleration sensor it shows running “login_dsc” first, this isn't on the DSC MK60 list either...

[tazmantic]

So quick update........

Had lateral sensor indoors last night in the warm and today when I put it on in the correct position it showed a reading of approx 0.4 instead of full scale so could erase fault, looks like maybe its got damp inside??? would drying for longer cure it????

but when I ran “querbeschleunigungssensor_dsc_abgleichen” I got an error....

apiJob("DSC_MK60","querbeschleunigung_dsc_abgleich en","","")
Satz : 0
OBJECT = dsc_mk60
SAETZE = 1
JOBNAME = querbeschleunigung_dsc_abgleichen
VARIANTE = DSC_MK60
JOBSTATUS =
UBATTCURRENT = -1
UBATTHISTORY = -1
IGNITIONCURRENT = -1
IGNITIONHISTORY = -1
Satz : 1
JOB_STATUS = ERROR_ECU_CONDITIONS_NOT_CORRECT_OR_REQUEST_SEQUEN CE_ERROR
_TEL_AUFTRAG = 7 Bytes
0000 : B8 29 F1 03 31 22 00 ¸)ñ.1".
_TEL_ANTWORT = 8 Bytes
0000 : B8 F1 29 03 7F 31 22 0F ¸ñ). 1".

and when I ran "lenkwinkel_dsc_abgleichen" I got error....

apiJob("DSC_MK60","lenkwinkel_dsc_abgleichen",""," ")
EDIABAS Error 19 : IFH-0009: NO RESPONSE FROM CONTROLUNIT


Thanks

[tazmantic]

So quick update........

Had lateral sensor indoors last night in the warm and today when I put it on in the correct position it showed a reading of approx 0.4 instead of full scale so could erase fault, looks like maybe its got damp inside??? would drying for longer cure it????

but when I ran “querbeschleunigungssensor_dsc_abgleichen” I got an error....

apiJob("DSC_MK60","querbeschleunigung_dsc_abgleich en","","")
Satz : 0
OBJECT = dsc_mk60
SAETZE = 1
JOBNAME = querbeschleunigung_dsc_abgleichen
VARIANTE = DSC_MK60
JOBSTATUS =
UBATTCURRENT = -1
UBATTHISTORY = -1
IGNITIONCURRENT = -1
IGNITIONHISTORY = -1
Satz : 1
JOB_STATUS = ERROR_ECU_CONDITIONS_NOT_CORRECT_OR_REQUEST_SEQUEN CE_ERROR
_TEL_AUFTRAG = 7 Bytes
0000 : B8 29 F1 03 31 22 00 ¸)ñ.1".
_TEL_ANTWORT = 8 Bytes
0000 : B8 F1 29 03 7F 31 22 0F ¸ñ). 1".

and when I ran "lenkwinkel_dsc_abgleichen" I got error....

apiJob("DSC_MK60","lenkwinkel_dsc_abgleichen",""," ")
EDIABAS Error 19 : IFH-0009: NO RESPONSE FROM CONTROLUNIT


Thanks

JUST BEEN READING, WOULD I NEED TO DO THE FTDI CABLE MOD TO STOP THESE ERRORS???

Thanks

[328 Power 04]

I would make sure the latency is at 1ms or 2ms for the cable in Device Manager.

Unfortunately without having a car in front of me to experiment on why the errors are coming up, it's really hard to say.
It still sounds like your steering angle sensor is disconnected or malfunctioning.

[tazmantic]

It is deff set to 1ms and I think the steering angle sensor is prob malfunctioning, if it was faulty would it state " NO RESPONSE FROM CONTROLUNIT " as for the lateral sensor on the " DSC MK60 " do I just run “querbeschleunigungssensor_dsc_abgleichen” because on your wright up for the " DSC_E46 " you go to “login_dsc” first but this is not listed on " DSC MK60 " or would a faulty steering angle sensor stop you calibrating the lateral sensor.

Thanks again so much

just looked the driver version is 2.12.28.0 should I change it to 2.10.00 as it seems to connect fine in INPA

[328 Power 04]

It's not a driver issue, that's for sure.

I don't think the login_dsc was necessary to do. In my few tests, it seemed a bit insignificant.

[tazmantic]

Well tried this morning with the cable mod (not pins soldered together just the software) and got exactly the same errors so I'm just wondering if I need to fix the 5E1E CAN Timeout LWS error before I can calibrate the lateral sensor, time to buy a lateral sensor and steering angle sensor off ebay then try again. Thanks for the help so far will be back soon with an update..

Thanks again

[tazmantic]

Hi all, not got items yet but had a thought when I run INPA and click on DSC MK60 I get the following message......

versions do not match
malfunction possible

But if I click ok I can read errors etc, could this be causing problems???

Thanks

[328 Power 04]

Those are "for your info" errors and do not affect diagnosis. Quite normal.

(Internal file versions of INPA data files aren't all matching, because of effort to keep it all in English as best as possible. It doesn't affect anything with the diagnosis process)

[Andpaw88]

What settings do you have for com port in device manager?

[328 Power 04]

Any COM port number you choose, as long as it matches obd.ini file. And 2ms latency.

[Andpaw88]

Any COM port number you choose, as long as it matches obd.ini file. And 2ms latency.

So try with 1ms

[328 Power 04]

?

Directed to wrong user?
I don't have any problems communicating. 1 and 2ms are very similar. 2ms has been much more stable in my experience.

[tazmantic]

Thanks guys I’m using 1ms so might try 2.

Any info at all is greatfully received

[Andpaw88]

Thanks guys I’m using 1ms so might try 2.

Any info at all is greatfully received

Show your settings in ediabas.ini and obd.ini. I'm also trying to find good settings for my K-DCAN interface. One thing I'm almost sure that you have pins soldered.

[328 Power 04]

Show your settings in ediabas.ini and obd.ini. I'm also trying to find good settings for my K-DCAN interface. One thing I'm almost sure that you have pins soldered.

He has communication to all modules and his settings are correct... He needs a working steering angle sensor.
Not sure what you're trying to accomplish.

[Andpaw88]

He has communication to all modules and his settings are correct... He needs a working steering angle sensor.
Not sure what you're trying to accomplish.

I didn't read all post, so I understand it wrong. Sorry

[tazmantic]

Well 2nd hand sensor turned up today, plugged it in and still exactly the same.........

So is it another faulty sensor or is the DSC faulty??? or could there some how be a break in the cables somewhere.... on the DSC MK60 does the steering angle sensor just connect to the DSC or is there another module?

Cheers guys

P.S or do I need to run the engine....