[secrethero]

Hi Guys,

I have a 2008 335xi auto (no active steering) and getting following errors.
There is no power lost.

1. ABS / DSC / Brake:
<--------------------------->
Dynamische Stabilitaets Kontrolle / DSC:
- Fault: AFS actuator signal implausible.
- Code: 005E52
<--------------------------->
Transmission / Getriebesteuerung:
- Fault: VGSG-wheel-Notlaufregelung activated. No DXC target torque setting.
- Code: 0055C3
- Fault: CAN MESSAGE SPEED RAD, CE
- Code: 0055C6


Battery is new.
Getting these errors while driving at highway at 100Kmh + sometime slower than that.
It goes away after parking for a while and dashboard lights up like Christmas tree once I start driving.

One time I got following error but it was just once. It went away after clearing codes:

<--------------------------->
Dynamische Stabilitaets Kontrolle / DSC:
- Fault: F-CAN SSL serial number incorrectly.
- Code: 005E50
<===========================>

My car doesnt have active steering but code 005E52 pops up.


I did calibrate the steering angle with INSTA and also manually turn the steering wheel all the way to the left&right few times but it made no difference.


Any thoughts?

Thanks!

[gbalthrop]

Originally Posted by secrethero

... 2008 335xi auto... getting following errors:
5E52, 55C3, 55C6...

Wheel Speed signal from Front-Right Wheel Speed Sensor (5E52) appears to be causing your Warning Lights & Codes.

Suggested Diagnostics:
1) Use Scan Tool or Diagnostic Software (INPA/ISTA) to view Wheel Speed "Live Data" as you slowly move forward & backward.

2) Look for any discrepancy between Right Front wheel speed/direction vs. other three. Report Findings.

3) If RF signal differs from others, carefully examine Speed Sensor wiring & connector in Wheel Well for any damage.

3a) If your Scan Tool/Software can show "Freeze Frame Data" for 5E52 Code, please provide that data.

4) If NO obvious damage, please provide results from tests above & Last-7 Characters of VIN so we can provide ISTA wiring diagram & other test suggestions.
George

[secrethero]

Originally Posted by gbalthrop

Wheel Speed signal from Front-Right Wheel Speed Sensor (5E52) appears to be causing your Warning Lights & Codes.

Suggested Diagnostics:
1) Use Scan Tool or Diagnostic Software (INPA/ISTA) to view Wheel Speed "Live Data" as you slowly move forward & backward.

2) Look for any discrepancy between Right Front wheel speed/direction vs. other three. Report Findings.

3) If RF signal differs from others, carefully examine Speed Sensor wiring & connector in Wheel Well for any damage.

3a) If your Scan Tool/Software can show "Freeze Frame Data" for 5E52 Code, please provide that data.

4) If NO obvious damage, please provide results from tests above & Last-7 Characters of VIN so we can provide ISTA wiring diagram & other test suggestions.
George

Thanks George.
INPA doesnt seem to work but ISTA does.
Do you happen to know the steps to capture Wheel Speed "Live Data" within ISTA? Its been a while.

[gbalthrop]

Originally Posted by secrethero

... INPA doesnt seem to work but ISTA does.
Do you happen to know the steps to capture Wheel Speed
"Live Data" within ISTA? Its been a while.

I attach a ScreenPrint of the ISTA "Diagnosis Scan" Wheel-Speed Sensor screen from my 328xi with "DXC_90".
Vehicle was stationary at time ScreenPrint saved.
Connect to DSC/DXC Module at Control Unit Tree or List, Select "Diagnosis Scan" Tab, & then Wheel-speed sensor".

See attached pdf's for ISTA (1) Fault Memory & Test Plan, & (2) ISTA as Shop Manual.
George

[secrethero]

Originally Posted by gbalthrop

I attach a ScreenPrint of the ISTA "Diagnosis Scan" Wheel-Speed Sensor screen from my 328xi with "DXC_90".
Vehicle was stationary at time ScreenPrint saved.
Connect to DSC/DXC Module at Control Unit Tree or List, Select "Diagnosis Scan" Tab, & then Wheel-speed sensor".

See attached pdf's for ISTA (1) Fault Memory & Test Plan, & (2) ISTA as Shop Manual.
George

Thanks. I'll give that a try.

[secrethero]

It looks like Front Right wheel is jumping up and down ever so slightly.
What is the acceptable delta between wheels?
There was also brief-millisecond where it said "not available km/h" for all wheels.
And "not available" for direction of rotation but it was very quick (millisecond).

[oVeRdOsE.]

I was chasing this earlier in the spring. And my live speed were equal in INPA.
Yes I had communication cuts, but might be the latency.

your speed delta is high. It's enough to trigger the flat tire warning (assuming you have a canadian car). Is it the case?

by any chance, does your tires are all equal size and air pressure?

other than that, it can very be the speed sensor. Easy to change. You can find a DIY only to clean it instead of buying new.

only for your info, here what I've checked and what was my solution :

- reset the steering angle (steer right and left)
- check battery voltage
- Check the steering angle sensor position ( I changed my steering wheel)
- check speed sensor (physically and INPA)
- check transfer case connection
- reset transfer case with ISTA ''oil change''
- clear code with JB4
- get an alignent

all those didnt worked

- and one day I decided to clear code with MHD and they never came back.

beat me, a coincidence probably, can't tell what was the ''real issue'', and the code was probably ghosting here.

[secrethero]

Originally Posted by oVeRdOsE.

I was chasing this earlier in the spring. And my live speed were equal in INPA.
Yes I had communication cuts, but might be the latency.

your speed delta is high. It's enough to trigger the flat tire warning (assuming you have a canadian car). Is it the case?

by any chance, does your tires are all equal size and air pressure?

other than that, it can very be the speed sensor. Easy to change. You can find a DIY only to clean it instead of buying new.

only for your info, here what I've checked and what was my solution :

- reset the steering angle (steer right and left)
- check battery voltage
- Check the steering angle sensor position ( I changed my steering wheel)
- check speed sensor (physically and INPA)
- clear code with JB4
- get an alignent

all those didnt worked

- and one day I decided to clear code with MHD and they never came back.

beat me, a coincidence probably, can't tell what was the ''real issue''.

Thanks, oVeRdOsE. - Yes, I have a Canadian car and tires are all equal size. I ll double check the air pressure.
Flat tire warning/error doesnt get triggered.
Wheel alignment/tire-balance/rotation was done 7000km ago.
I did calibrate steering angle manually and using ISTA.
This seems to happen at high speeds.

[gbalthrop]

Originally Posted by secrethero

It looks like Front Right wheel is jumping up and down ever so slightly.
What is the acceptable delta between wheels?
There was also brief-millisecond where it said "not available km/h" for all wheels.
And "not available" for direction of rotation but it was very quick (millisecond).

I see Multiple "issues" with the data:
1) 1 of 3 screens showing all 4 wheel speeds, RF is <1% deviation from others. Other two screens, 4 to 6% deviation, RF slower than others

2) 1 of 4: Rotation Direction "Not Available" on all 4 wheels;

3) 1 of 4: Wheel Speed "Not Available" on all 4 wheels;

Be aware that what you see on screen is NOT instantaneous. There is s "Refresh Rate" in the data, which depends upon the number of Parameters or inputs that are processed & displayed.

Since there are Multiple intermittent Live Data errors, I would suggest disconnecting the Connector at the DSC and checking for corrosion/damage of pins/sockets. Also check the Chassis Ground connection on the L Strut Tower.

It is "possible" that there is a signal problem from the RF Speed Sensor which is causing issues at the DSC. While I do NOT see that as probable, you could always disconnect that Sensor & see if Live Data anomalies cease (except for NO RF Speed/ Rotation Direction, & Fault).
George

[secrethero]

Originally Posted by gbalthrop

Since there are Multiple intermittent Live Data errors, I would suggest disconnecting the Connector at the DSC and checking for corrosion/damage of pins/sockets. Also check the Chassis Ground connection on the L Strut Tower.

gbalthrop - Where is is DSC Connector located? Do you have a diagram? Thanks again!

[gbalthrop]

Originally Posted by secrethero

gbalthrop - Where is is DSC Connector located? Do you have a diagram? Thanks again!

Attached are ISTA ScreenPrints showing Location of DSC/DXC on your 2008 335xi & also Connector View, Pin #ID, X1746.
The Module & Connector are located next to the Brake Fluid Reservoir, under the cover on the Lower Microfilter Housing
on the Driver side.

Please let us know what you find,
George

[secrethero]

UPDATE:
- Disconnected the connector at the DSC and pins/sockets looks good no corrosion or damage.
- Checked chassis Ground connection on the L Strut Tower and looks good.
- Removed Right Front Speed Sensor to see if it had any damage or worn out but it looks good.
Mine didn’t have a 1mm thick (7mm Diameter) washer. It wasn’t easy to take it out tho.

What I found was, Inner hex bolt that is supposed to hold the right front rotor is missing (see below photo). Rotor and brake pads were replaced around 8000km ago. I am guessing the mechanic(Indy) either forgot to install it (I don’t know how that is even possible because you need to align it with wheel lug housing to install the wheel) or he broke the original Inner hex bolt. Whole thing was hold by wheel lug nuts.

I need to get an Inner hex bolt rotor to see if this is the source of the problem.

[gbalthrop]

All the missing screw does is align & hold the disc in place so you can attach the 5 wheel bolts. The cause of your intermittent DSC/DXC wheel speed display, & resulting Warning Lights, is either in the INPUTs from Sensors to Module, Power supply/Ground to Module, or in the DSC Module itself.

Intermittent Faults are often the hardest to locate. Not sure why the amount of speed deviation in RF wheel varies, or WHY you have intermittent Issues with both Rotation & Speed in ALL wheels. ONLY code you've seen is for RF Speed?

Does your RF Wheel Speed Sensor get signal from toothed Reluctor, or magnets in Wheel Bearing? Any scraping of end of sensor by Reluctor or Bearing?
George

[secrethero]

Originally Posted by gbalthrop

All the missing screw does is align & hold the disc in place so you can attach the 5 wheel bolts. The cause of your intermittent DSC/DXC wheel speed display, & resulting Warning Lights, is either in the INPUTs from Sensors to Module, Power supply/Ground to Module, or in the DSC Module itself.

Intermittent Faults are often the hardest to locate. Not sure why the amount of speed deviation in RF wheel varies, or WHY you have intermittent Issues with both Rotation & Speed in ALL wheels. ONLY code you've seen is for RF Speed?

Does your RF Wheel Speed Sensor get signal from toothed Reluctor, or magnets in Wheel Bearing? Any scraping of end of sensor by Reluctor or Bearing?
George

I am capturing screen recording of ISTA+ with Camtasia software to be reviewed later.
Basically, I start ISTA+ and connect to the car, then open Camtasia and start screen recording with my laptop (placed on passenger seat). Then start driving on highway.
Communication cuts for Rotation Direction "Not Available" and Wheel Speed "Not Available" on all 4 wheels are only for millisecond, same as what @oVeRdOsE had.

I cleaned RF sensor. Also investigated Reluctor ring and cleaned it with power-towel rolled into screwdriver. Nothing much gunk or dirt came out.

Today I drew for couple of hours on highway with high speed while I was screen recording. No errors or faults came on, but I still see RF sensor ever so slightly jumping.
It might be the sensor. I'll get a new one to see if that fixes the issue.
As for other errors codes, for couple of years getting AUC SENSOR 00A6CF fault code. This is way before the RF wheel speed issue started.

Thanks!

[secrethero]

UPDATE:
After cleaning Right Fronts wheel speed sensor and Reluctor/ABS ring, the error code is no longer popping up. Its been two weeks. Looks like all good.
I didnt need to get a new sensor.
Thanks.