2015 T'Reg with Screwed up ACC

Uwe · Oct 27, 2015

This car got its nose out of joint in an altercation with the trailer hitch on a Jeep Cherokee. The damage was largely cosmetic, except for ACC sensor 2. The cosmetics have been repaired, but the dealer was missing some of the tools needed to re calibrate the ACC, so it hasn't been done yet.

Auto-Scan with happy systems have been snipped for brevity:

Code:

Tuesday,27,October,2015,16:45:22:42678
VCDS -- Windows Based VAG/VAS Emulator Running on Windows 7 x86
VCDS Version: 15.8.4.0
Data version: 20150904
www.Ross-Tech.com

Workshop Code: 444 03743 000001

VIN: WVGEP9BP9FD003413   License Plate: 15.8.4-HNAP
Mileage: 10917km-6783mi   Repair Order: 


Chassis Type: BP (7P6)
Scan: 01 02 03 05 08 09 10 13 15 16 17 19 36 3C 42 46 47 52 53 55
          56 5F 62 65 69 6C 6D 72 85 8B 8E

VIN: WVGEP9BP9FD003413   Mileage: 10917km-6783miles

01-Engine -- Status: OK 0000
02-Auto Trans -- Status: OK 0000
03-ABS Brakes -- Status: OK 0000
04-Steering Angle -- Status: OK 0000
05-Acc/Start Auth. -- Status: OK 0000
08-Auto HVAC -- Status: OK 0000
09-Cent. Elect. -- Status: OK 0000
10-Park/Steer Assist -- Status: OK 0000
13-Auto Dist. Reg -- Status: Malfunction 0010
15-Airbags -- Status: OK 0000
16-Steering wheel -- Status: OK 0000
17-Instruments -- Status: OK 0000
19-CAN Gateway -- Status: OK 0000
36-Seat Mem. Drvr -- Status: OK 0000
3C-Lane Change -- Status: OK 0000
42-Door Elect, Driver -- Status: OK 0000
46-Central Conv. -- Status: OK 0000
47-Sound System -- Status: OK 0000
52-Door Elect, Pass. -- Status: OK 0000
53-Parking Brake -- Status: OK 0000
55-Headlight Range -- Status: OK 0000
56-Radio -- Status: OK 0000
5F-Information Electr. -- Status: OK 0000
62-Door, Rear Left -- Status: OK 0000
65-Tire Pressure -- Status: OK 0000
69-Trailer -- Status: OK 0000
6C-Back-up Cam. -- Status: OK 0000
6D-Trunk Elect. -- Status: OK 0000
72-Door, Rear Right -- Status: OK 0000
85-On Board Cam. -- Status: OK 0000
8B-Adaptive Cruise 2 -- Status: Malfunction 0010
8E-Image Processing -- Status: OK 0000
 
-------------------------------------------------------------------------------
Address 13: Auto Dist. Reg (J428)       Labels: 4H0-907-561.clb
   Part No SW: 7P6 907 561 C    HW: 7P6 907 561 
   Component: ACC3          H21 0400  
   Serial number: 00000000000000
   Coding: 3701010101
   Shop #: WSC 31414 790 00001
   ASAM Dataset: EV_AdaptCruisContrVW526 002012
   ROD: EV_AdaptCruisContrVW526.rod
   VCID: BC3B37AB37CD91DE7F-80E8

1 Fault Found:
92416 - Function Restriction due to Faults in Other Modules 
          U1113 00 [009] - -
          Confirmed - Tested Since Memory Clear
             Freeze Frame:
                    Fault Status: 00000001
                    Fault Priority: 6
                    Fault Frequency: 2
                    Reset counter: 52
                    Mileage: 10909 km
                    Date: 2015.10.27
                    Time: 12:03:22

                    Control Module temperature: 18 °C
                    Voltage terminal 15: 14.823 V
                    Velocity_vehicle_reference: -0.01 m/s
                    Longitudinal_acceleration_vehicle_reference: 0.08 m/s²

-------------------------------------------------------------------------------
Address 8B: Adaptive Cruise 2 (J428)       Labels: 4H0-907-561.clb
   Part No SW: 7P6 907 541 C    HW: 7P6 907 541 
   Component: ACC3          H21 0400  
   Serial number: 00000000000000
   Coding: 3701010101
   Shop #: WSC 31414 790 00001
   ASAM Dataset: EV_AdaptCruisContr2VW526 002011
   ROD: EV_AdaptCruisContr2VW526.rod
   VCID: BA3731B33DF9AFEE6D-80EE

3 Faults Found:
88064 - Sensor for Automatic Distance Regulation; Incorrectly Positioned 
          C1103 00 [009] -  - 
          Confirmed - Tested Since Memory Clear
             Freeze Frame:
                    Fault Status: 00000001
                    Fault Priority: 2
                    Fault Frequency: 1
                    Reset counter: 52
                    Mileage: 10909 km
                    Date: 2015.10.27
                    Time: 12:03:28

                    Control Module temperature: 19 °C
                    Voltage terminal 15: 14.772 V
                    Velocity_vehicle_reference: -0.01 m/s
                    Longitudinal_acceleration_vehicle_reference: 0.07 m/s²

88320 - Sensor for Automatic Distance Regulation; Incorrectly Positioned 
          C1103 00 [009] -  - 
          Confirmed - Tested Since Memory Clear
             Freeze Frame:
                    Fault Status: 00000001
                    Fault Priority: 2
                    Fault Frequency: 1
                    Reset counter: 52
                    Mileage: 10909 km
                    Date: 2015.10.27
                    Time: 12:03:28

                    Control Module temperature: 19 °C
                    Voltage terminal 15: 14.772 V
                    Velocity_vehicle_reference: -0.01 m/s
                    Longitudinal_acceleration_vehicle_reference: 0.07 m/s²

12032 - Sensor for Automatic Distance Regulation; Incorrectly Positioned 
          C1103 00 [009] -  - 
          Confirmed - Tested Since Memory Clear
             Freeze Frame:
                    Fault Status: 00000001
                    Fault Priority: 2
                    Fault Frequency: 1
                    Reset counter: 52
                    Mileage: 10909 km
                    Date: 2015.10.27
                    Time: 12:03:28

                    Control Module temperature: 19 °C
                    Voltage terminal 15: 14.772 V
                    Velocity_vehicle_reference: -0.01 m/s
                    Longitudinal_acceleration_vehicle_reference: 0.07 m/s²

For laughs, I poked around in these modules today and look at what I found in the measuring values.

Sensor 1:
Address 13: Auto Dist. Reg (7P6 907 561 C)

17:02:16
015 Horizontal angle deviation 0.89 °
017 Misalignment angle 0.04 °
018 Misalignment angle; fast algorithm 0.02 °
025 Vertical angle deviation -0.06 °

Sensor 2:
Address 8B: Adaptive Cruise 2 (7P6 907 541 C)

17:01:25
003 Horizontal angle deviation -1.00 °
004 Misalignment angle 2.50 °
005 Misalignment angle; fast algorithm 2.48 °
012 Vertical angle deviation -0.36 °

Does anyone know what the acceptable Misalignment values are, and on what basis the module calculates them?

I'm told there are mechanical adjusters on the sensor.

There's a Basic Setting in these modules named "Reset misalignment angle" but I didn't try it -- yet.

-Uwe-

AIB Wolfgang · Oct 28, 2015

"Does anyone know what the acceptable Misalignment values are, and on what basis the module calculates them"

Hello Uwe
maximum deviation 0,8° and should be adjusted, will be noticeable in control mode.
Over 1,4° fault will be set.
To adjust you need wheel alignment equipment with VAS 6430/1 and VAS 6430/3

NEtech · Oct 28, 2015

Uwe said:
Does anyone know what the acceptable Misalignment values are, and on what basis the module calculates them?

Right as Wolfgang wrote, there is some explanation in SSP 276 and 289.

AIB Wolfgang · Oct 28, 2015

AND much better SSP620 :thumbs:

Uwe · Nov 9, 2015

OK, so this car has been in service (being used mostly locally) since my last post. This weekend I took it just around the corner to get some fuel for my lawn equipment (it's leaf clean-up season) and I noticed that the warning for ACC and Front Assist was no longer active!

Nothing has been done to the car. In fact, I have an appointment to have it calibrated at the dealer on Wednesday morning.

So today we scanned it and found the following fault codes:

13:

Code:

-------------------------------------------------------------------------------
Address 13: Auto Dist. Reg (J428)       Labels: 4H0-907-561.clb
   Part No SW: 7P6 907 561 C    HW: 7P6 907 561 
   Component: ACC3          H21 0400  
   Serial number: 00000000000000
   Coding: 3701010101
   Shop #: WSC 31414 790 00001
   ASAM Dataset: EV_AdaptCruisContrVW526 002012
   ROD: EV_AdaptCruisContrVW526.rod
   VCID: 3C7CFC86B7916DDE41-8068

2 Faults Found:
12032 - Sensor for Automatic Distance Regulation; Incorrectly Positioned 
          C1103 00 [008] -  - 
          Intermittent - Confirmed - Tested Since Memory Clear
             Freeze Frame:
                    Fault Status: 00000001
                    Fault Priority: 2
                    Fault Frequency: 3
                    Reset counter: 94
                    Mileage: 10921 km
                    Date: 2015.10.28
                    Time: 11:30:10

92416 - Function Restriction due to Faults in Other Modules 
          U1113 00 [008] - -
          Intermittent - Confirmed - Tested Since Memory Clear
             Freeze Frame:
                    Fault Status: 00000001
                    Fault Priority: 6
                    Fault Frequency: 1
                    Reset counter: 94
                    Mileage: 10917 km
                    Date: 2015.10.27
                    Time: 16:53:48

8B:

Code:

-------------------------------------------------------------------------------
Address 8B: Adaptive Cruise 2 (J428)       Labels: 4H0-907-561.clb
   Part No SW: 7P6 907 541 C    HW: 7P6 907 541 
   Component: ACC3          H21 0400  
   Serial number: 00000000000000
   Coding: 3701010101
   Shop #: WSC 31414 790 00001
   ASAM Dataset: EV_AdaptCruisContr2VW526 002011
   ROD: EV_AdaptCruisContr2VW526.rod
   VCID: 3A70FA9EBDA553EE53-806E

3 Faults Found:
88064 - Sensor for Automatic Distance Regulation; Incorrectly Positioned 
          C1103 00 [008] -  - 
          Intermittent - Confirmed - Tested Since Memory Clear
             Freeze Frame:
                    Fault Status: 00000001
                    Fault Priority: 2
                    Fault Frequency: 1
                    Reset counter: 94
                    Mileage: 10917 km
                    Date: 2015.10.27
                    Time: 16:53:34

88320 - Sensor for Automatic Distance Regulation; Incorrectly Positioned 
          C1103 00 [008] -  - 
          Intermittent - Confirmed - Tested Since Memory Clear
12032 - Sensor for Automatic Distance Regulation; Incorrectly Positioned 
          C1103 00 [008] -  - 
          Intermittent - Confirmed - Tested Since Memory Clear
             Freeze Frame:
                    Fault Status: 00000001
                    Fault Priority: 2
                    Fault Frequency: 1
                    Reset counter: 94
                    Mileage: 10917 km
                    Date: 2015.10.27
                    Time: 16:53:34

All the fault codes were now flagged "Intermittent" and the warning was still off

Positioning data now shows:

Code:

Address 13: Auto Dist. Reg  (7P6 907 561 C)

15:53:59
  015   Horizontal angle deviation 0.89 °
  017   Misalignment angle 0.31 °
  018   Misalignment angle; fast algorithm 0.13 °
  025   Vertical angle deviation -0.06 °


Address 8B: Adaptive Cruise 2  (7P6 907 541 C)

15:53:02
  003   Horizontal angle deviation -1.00 °
  004   Misalignment angle -0.08 °
  005   Misalignment angle; fast algorithm -0.26 °
  012   Vertical angle deviation -0.36 °

So we cleared the fault codes and it seems they are staying clear. Again, we've done nothing else to the car except drive it some. It's almost like this positioning stuff is self-adapting to some extent?

Now I'm debating whether it's worth taking time at the dealer to fix something that has un-broken itself..? :confused:

-Uwe-

Jack@European_Parts · Nov 9, 2015

I believe it could auto-adapt.

Uwe · Nov 10, 2015

Hat-tip to Niels for finding this article:

http://www.linzing.de/sensorjustage-wird-einfacher/

For those who don't read German, it basically implies that second-generation sensors are indeed capable of self-calibration to some extent.

Be that as it may, we're going to play with it at the dealer tomorrow anyway, just to see what the process is like, and maybe to get the angle deviation a little better than 0.89° and -1.00°.

-Uwe-

Uwe · Nov 11, 2015

So... Dealer put it on the rack today. Unfortunately, we did not arrive early enough to see it in real-time, but they took some pictures for me:

Sensor adjustment is very accessible after removing the access panels:

They say the "Fast Algorithm" values are the ones that change during the adjustment.

The "Horizontal angle deviation" values did not change at all (verified identical even after a short test drive). I suspect these are some kind of long-term "trim" and I am curious to see if they do change with time and miles..

-Uwe-

Uwe · Dec 4, 2015

Values ~1000+ miles later (much of which was driven on the highway with ACC on and working fine):

Code:

                Address 13: Auto Dist. Reg  (7P6 907 561 C)

14:19:58
  015   Horizontal angle deviation 0.89 °
  017   Misalignment angle -0.21 °
  018   Misalignment angle; fast algorithm -0.22 °
  025   Vertical angle deviation -0.06 °

--------------------------------------------------------------------------------
--------------------------------------------------------------------------------


                Address 8B: Adaptive Cruise 2  (7P6 907 541 C)

14:21:13
  003   Horizontal angle deviation -1.00 °
  004   Misalignment angle 0.29 °
  005   Misalignment angle; fast algorithm 0.28 °
  012   Vertical angle deviation -0.36 °

2015 T'Reg with Screwed up ACC

Uwe

Benevolent Dictator

AIB Wolfgang

VCDS Distributor

NEtech

VCDS Distributor

AIB Wolfgang

VCDS Distributor

Uwe

Benevolent Dictator

Jack@European_Parts

Gone But Not Forgotten

Uwe

Benevolent Dictator

Uwe

Benevolent Dictator

Uwe

Benevolent Dictator