HEX-NET will to read engine addresses

   #1  

BinsuJiro

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I have a 2008 2.0T A4 Quattro which showed a check engine light two days ago. The A4 seems to be running well, but I cannot gain access to the OBD-II fault codes, and when I run a diagnostic none of the engine addresses are read. All other addresses are read normally and there is no data that indicates what might be wrong.

Any Ideas??? Best Binsu
 
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Uwe

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You're presumably doing this with VCDS-Mobile?

What happens if you just do [Select] -> [01-Engine]?

Shaun had a 2008 A4 2.0T for several years while working on the HEX-NET and VCDS-Mobile. So I'm pretty confident it should work. :)

-Uwe-
 
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Zenerdiode

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My A4q is a 2.0TFSi too, however it is the CDNC engine and I believe on your side of the pond, you have the CAEB. My HN works flawlessly wired with a USB cable, Access Point with VCDS, and stand-alone with VCDS-Mobile.

I’m pretty sure I’ve seen VCDS logs with the CAEB, but not sure of CAEB with VCDS-Mobile.
 
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BinsuJiro

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You're presumably doing this with VCDS-Mobile?

What happens if you just do [Select] -> [01-Engine]?

Shaun had a 2008 A4 2.0T for several years while working on the HEX-NET and VCDS-Mobile. So I'm pretty confident it should work. :)

-Uwe-
Yes, I'm using VCDS mobile, and I will try to select. But, I still cannot access the OBD-II data to find out what codes are being thrown.

Best, V
 
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BinsuJiro

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My A4q is a 2.0TFSi too, however it is the CDNC engine and I believe on your side of the pond, you have the CAEB. My HN works flawlessly wired with a USB cable, Access Point with VCDS, and stand-alone with VCDS-Mobile.

I’m pretty sure I’ve seen VCDS logs with the CAEB, but not sure of CAEB with VCDS-Mobile.
I have been unable to even access the OBD-II fault codes, and all of the other addresses output results. One anomaly I noticed is that some engine data appeared for a split second when I first started the diagnostic, but immediately disappeared. Thanks, Binsu
 
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Shaun

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If you go to [Select] -> [Engine] -> [Functions] -> [Fault codes] do you see anything?
 
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BinsuJiro

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You're presumably doing this with VCDS-Mobile?

What happens if you just do [Select] -> [01-Engine]?

Shaun had a 2008 A4 2.0T for several years while working on the HEX-NET and VCDS-Mobile. So I'm pretty confident it should work. :)

-Uwe-
Dear Uwe, I tried that and the HEX-NET makes three attempts to initiate the K-line and will not load any address from 01 through 07. OBD-II data is unavailable. However, the Check Engine Light [CEL] has gone off.

My son drives the car, so I have no first hand knowledge of the conditions under which the CEL will light, and there were no apparent symptoms that I could hear, see or feel. There could have been a possibility that either the oil filler cap or the gas cap may have been loose. He got fuel yesterday and the light is off now.

However, it is disconcerting that I am unable to diagnose this particular A4. I do know that Audi can read the engine codes and addresses 01 through 07.

This is frustrating and puzzling. Any assistance would be appreciated.

Best, Binsu
 
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BinsuJiro

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If you go to [Select] -> [Engine] -> [Functions] -> [Fault codes] do you see anything?

Shaun, thanks for your advise; please see my reply to Uwe. Best, Binsu
 
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It sounds like you might have problems with one of the klines. Does this car have an aftermarket radio? Plugged into car, what does [Options] -> [Self Test] show for K1 and K2 status? Can you post a whole autoscan so we can see what is and is not talking?
 
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Uwe

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It sounds like you might have problems with one of the klines.
Except on a 2008 US model A4 , the ECU will be on CAN, as is 02-Auto Trans (if it has one), and 03-ABS. Furthermore, the powertrain CAN is brought directly to pins 6 and 14 on the DLC, and there is no Gateway. I wonder if he's got a problem with the wiring to those pins.

-Uwe-
 
   #11  

Shaun

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Oh right, so this is like my old car. What does [Options] -> [Self Test] show for CAN status, with engine running? If it shows "Testing" you might have a problem with the wiring to the DLC, like Uwe said, because there should definitely be CAN traffic on the port.
 
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   #12  

BinsuJiro

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It sounds like you might have problems with one of the klines. Does this car have an aftermarket radio? Plugged into car, what does [Options] -> [Self Test] show for K1 and K2 status? Can you post a whole autoscan so we can see what is and is not talking?
OK, Shaun, I'll go out and run a complete autoscan, and I will try the Options -> Self Test for K1 and K2. BTW, this car does not have any aftermarket equipment installed anywhere. I'll be back soon.
 
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Uwe

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Oh right, so this is like my old car.
Yep, which is why I'm pretty confident it should work, despite being quite odd in terms of how it works. ;)

-Uwe-
 
   #14  

BinsuJiro

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It sounds like you might have problems with one of the klines. Does this car have an aftermarket radio? Plugged into car, what does [Options] -> [Self Test] show for K1 and K2 status? Can you post a whole autoscan so we can see what is and is not talking?
Shaun, here is the entire scan. Addresses 01 through 07 did not read. The self test read:

APP Id (1) CodeBlock V0.4437 API V4 FW version: 0.254. Dataset: 60000055

K1: OK, K2: OK, CAN Not ready, VCDS-Cloud: Testing, Config: OK.

Code:
Mon,May,13,2019,22:56:52 
VCDS Mobile 0.4437.0.4 

VIN: WAUAF78E48Axxxxxx 

Chassis Type:[B]8E[/B] 
Scan: 01 02 03 08 09 0F 11 15 16 17 18 36 37 45 46 55 56 57 65 67 
69 75 76 77 

VIN: WAUAF7[B]8E[/B]48Axxxxxx 




----------------------------------------------------------------- 
Address 08: Auto HVAC	Labels: 8E0-820-043.lbl 
Part No SW: 8E0 820 043 BM	
Component: A4 Klimaautomat 3233 
Coding: 00000 
Shop #: WSC 00000 000 
VCID: 6D9D5AB72C63FF8B4354E7-5160 

1 Fault Found: 
01272 - Positioning Motor for Central Flap (V70) 
41-00 - Blocked or No Voltage



----------------------------------------------------------------- 
Address 09: Cent. Elect.	Labels: 8E0-907-279-8EC.lbl 
Part No SW: 8E0 907 279 N	
Component: int. Lastmodul USA 0907 
Coding: 00003 
Shop #: WSC 06335 000 
VCID: 3D3DAAF73C83AF0BB374F7-4B00 

No fault codes found. 

----------------------------------------------------------------- 
Address 16: Steering wheel	Labels: 8E0-953-549.lbl 
Part No SW: 8E0 953 549 Q	
Component: Lenksäulenmodul 0801 
Coding: 02141 
Shop #: WSC 06335 000 
VCID: 41C5D607407BCBEBD79C9B-4B00 

No fault codes found. 

----------------------------------------------------------------- 
Address 17: Instruments	Labels: 8E-17.clb 
Part No SW: 8E0 920 951 N	HW: 8E0920951N 
Component: KOMBI+WFS 4 H14 0200 
Revision: 0200 Serial Number: 00000000000000 
Coding: 0022268 
Shop #: WSC 08201 444 85739 
VCID: 352DB2D704B3674B7B041F-5184 

No fault codes found. 

----------------------------------------------------------------- 
Address 46: Central Conv.	Labels: 8E0-959-433-MAX.lbl 
Part No SW: 8E0 959 433 CP	
Component: Komfortgerät T7B 4336 
Coding: 11820 
Shop #: WSC 06335 000 
VCID: 8145960780FB8BEB171CDB-4B00 

Subsystem 1 - Part No SW: 8E1-959-801-G 
Component: Türsteuer.FS BRM 0706 

3 Faults Found: 
01572 - Alarm triggered by Door Contact Switch; Passenger Side 
35-00 - - 


01574 - Alarm triggered by Door Contact Switch; Rear Right 
35-00 - - 


01573 - Alarm triggered by Door Contact Switch; Rear Left 
35-00 - - 



----------------------------------------------------------------- 
Address 56: Radio	Labels: 8J0-035-1xx-56.clb 
Part No SW: 8E0 035 195 AF	HW: 8E0035195AF 
Component: R Symphony2+ H01 0270 
Revision: 00H01000	Serial Number: AUZ1Z4G6904208 
Coding: 0210012 
Shop #: WSC 06335 000 00000 
VCID: 6B9954AF1277E2BB5D20C9-5160
 
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   #15  

BinsuJiro

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Except on a 2008 US model A4 , the ECU will be on CAN, as is 02-Auto Trans (if it has one), and 03-ABS. Furthermore, the powertrain CAN is brought directly to pins 6 and 14 on the DLC, and there is no Gateway. I wonder if he's got a problem with the wiring to those pins.

-Uwe-
Dear Uwe, please see the scan data I sent to Shaun. BTW the CAN reads as not ready, but Audi seems to be able to read the 01 through 07 addresses, and on some occasions I can read those addresses. As I mentioned earlier in the thread, the 01 was seen momentarily on the first scan, but no data was saved or appeared on the scan output.

The 01-Engine, 02-Auto Trans and the 03-ABS have all been read at one time or another.

The following is from a time that I was able to read addresses 01, 02, and 03:

Code:
#hndoc:?docid=00003624&xt=hnh:DFBF8CCC722EA2E86F267FF6A70056A599DB843CB5345CFECDC2E0D58D470C34 
VCDS Mobile 0.4401.0.4 
VIN: WAUAF78E48Axxxxxx 

Chassis Type:[B]8D[/B] Scan: 01 02 03 08 15 16 17 25 35 37 45 55 56 57 67 75 76 77 
VIN: WAUAF7[B]8E[/B]48Axxxxxx 
———————————————————————————————— 
Address 01: Engine	Labels: 06F-907-115-AXX.clb 
Part No SW: 8E1 910 115 G	HW: 8E0907115D 
Component: 2.0l R4/4V TFSI 0010 Revision: 5EH15— Serial Number: XXXXXXXXXXXXXX 
Coding: 0104010A02070120 
Shop #: WSC 06335 000 00000 
VCID: 260F659BC9151DD3C27FA4DAC0-8073 
1 Fault Found: 008577 - Performance Malfunction in Cooling System 
P2181 - 008 - Implausible Signal - MIL ON Freeze Frame: 
Fault Status: 11101000 
Fault Priority: 2 
Fault Frequency: 6 
Mileage: 178865 km 
Time Indication: 0 
RPM: 2273 /min 
Load: 28.6 
Speed: 74.0 km/h 
Temperature: 75.0°C Temperature: 23.0°C 
Absolute Pres.: 1000.0 mbar 
Voltage: 14.097 V
 
———————————————————————————————— 
Address 02: Auto Trans	Labels: 8E-02.lbl 
Part No SW: 8E5 910 155 A	HW: 01J927156HT 
Component: V30 01J 2.0TFSI USA 0010 Revision: 00000009	Serial Number: 00000001165153 Coding: 0000001 Shop #: WSC 06335 000 00000 VCID: 28136BA3C3010BA3F093BAF23A-807D 
No fault codes found. 

———————————————————————————————— 
Address 03: ABS Brakes	Labels: 8E0-910-517.clb 
Part No SW: 8E0 910 517 H	HW: 8E0614517BF 
Component: ESP8 FRONT H06 0140 
Revision: 00000000
Serial Number: 00000000000000 
Coding: 0004525 
Shop #: WSC 06335 000 00000 
VCID: 2C1B97B3D7F9278314BBE6020E-8079 
No fault codes found.
 
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   #16  

Uwe

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In the scan two posts up, everything that talks in on K-Line, and everything that doesn't is on CAN.

"CAN Not Ready" could be a lack of connection to the car's CAN bus, possibly dodgy pins in the car's DLC, or a wiring problem in the car, or it could be some sort of internal failure in the HEX-NET.

I think the only way to sort this out is process of elimination. What other cars do you have available that you can plug the HEX-NET into?

-Uwe-
 
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BinsuJiro

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Hi Uwe, I have one outside now; Ill try to run the diagnostic on that one now. Back in a few.
 
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BinsuJiro

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Dear Uwe,

Well, I got side tracked and didn't get a chance to try the HEX-NET on the other Audi, a 2015 A4 Quattro Prestige until two days ago. The HEX-NET did read the CAN bus. It did take a bit of time for the CAN bus to be ready, but all of the addresses were read.

Can you suggest a protocol for trouble shooting the inability the HEX-NET to read the CAN bus on my 2008 A4?

Binsu
 
   #19  

BinsuJiro

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I tried the HEX-NET on the other Audi, a 2015 A4 Quattro Prestige, and the HEX-NET did read the CAN bus. If I'm trouble shooting the cars OBD-II bus at pins 6 and 14, how would I be able to do that and what readiness should I expect to get?

Would you have a photo of the OBD-II connector showing which pins 6 & 14 are?

Thank you,
Binsu
 
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-Uwe-
 
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