00256 - A/C Pressure/Temperature Sensor (G395)

   #1  

gdallas

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Evening Folks,


I’m about to go order a new G395 sensor to hopefully resolve the error on module 09. It looks to me that whatever those errors on module 8 are, they might also be resolved by replacing the faulty sensor on module 9. However, do you think the error in module 28 may also be due to the potentially faulty G395 sensor on module 9?


ps I didn’t update to the latest SW version last night before I canned as I wasn’t sure if the experimental clb files Dana sent me in November would be affected.



Code:
Monday,04,February,2019,18:01:47:12530
VCDS -- Windows Based VAG/VAS Emulator Running on Windows 7 x64
VCDS Version: 18.9.0.2 (x64)  HEX-V2 CB: 0.4436.4
Data version: 20181017 DS296.0
www.Ross-Tech.com


VIN: WAUZZZ4G8GN095717   License Plate: 
Mileage: 45117km-28034mi   Repair Order: 



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


Chassis Type: 4G-AU57 (4G8)
Scan: 01 02 03 05 08 09 15 16 17 19 20 28 3B 42 44 46 52 53 55 5F
          62 72 A9 AC C0

VIN: WAUZZZ4G8GN095717   Mileage: 45117km-28034miles

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: Malfunction 0010
09-Cent. Elect. -- 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
20-High Beam Assist. -- Status: OK 0000
28-HVAC, Rear -- Status: Malfunction 0010
3B-Sensor Elect. -- Status: OK 0000
42-Door Elect, Driver -- Status: OK 0000
44-Steering Assist -- Status: OK 0000
46-Central Conv. -- Status: OK 0000
52-Door Elect, Pass. -- Status: OK 0000
53-Parking Brake -- Status: OK 0000
55-Headlight Range -- Status: OK 0000
5F-Information Electr. -- Status: OK 0000
62-Door, Rear Left -- Status: OK 0000
72-Door, Rear Right -- Status: OK 0000
A9-Struct. Borne Sound -- Status: OK 0000
AC-Reductant Control -- Status: OK 0000
C0-Act. for Ext. Noise -- Status: OK 0000
-------------------------------------------------------------------------------
Address 01: Engine (J623-CVUA)       Labels:. 059-907-401-V2.clb
   Part No SW: 4G0 907 589 D    HW: 4G0 907 589 B
   Component: 3.0BTD EDC17  H23 0002  
   Revision: 54H23---    
   Coding: 0A2A4032252603030000
   Shop #: WSC 02391 785 00200
   ASAM Dataset: EV_ECM30BTD0114G0907589D 001002
   ROD: EV_ECM30BTD0114G0907589D.rod
   VCID: 3537DC9805C2798F7D3-8060

No fault code found.
Readiness: 0 0 0 0 0 

-------------------------------------------------------------------------------
Address 02: Auto Trans (J217)       Labels:| 0BK-927-156.clb
   Part No SW: 4G0 927 158 AK    HW: 0BK 927 156 AM
   Component: 0BK 30RTDIRdW H19 1005  
   Revision: --H19---    
   Coding: 000001
   Shop #: WSC 00000 000 00000
   ASAM Dataset: EV_TCMAL551211 002022
   ROD: EV_TCMAL551211_002_AU48.rod
   VCID: 77AB16905F4E4B9FAFF-8022

No fault code found.

-------------------------------------------------------------------------------
Address 03: ABS Brakes (J104)       Labels:. 4G0-907-379-V2.clb
   Part No SW: 4G0 907 379 S    HW: 4G0 907 379 S
   Component: ESP9 Premium  H01 0530  
   Revision: --------    Serial number: --------------
   Coding: 49A79E4192E579829B00
   Shop #: WSC 02391 785 00200
   ASAM Dataset: EV_ESP9BOSCHAU57X 004018
   ROD: EV_ESP9BOSCHAU57X.rod
   VCID: 41DFB848410AC52FD1B-8014

No fault code found.

-------------------------------------------------------------------------------
Address 05: Acc/Start Auth. (J393)       Labels:. 8K0-907-064-05.clb
   Part No SW: 4H0 907 064 GN    HW: 4H0 907 064 GN
   Component: BCM2 2.0      H37 0572  
   Revision: 00002001    
   Coding: 01B8704E000000000000
   Shop #: WSC 02391 785 00200
   VCID: 7BA30AA063E66FFFCB7-802E

   Subsystem 2 - Part No SW: 4H0 905 852 C    HW: 4H0 905 852 C
   Component: J764 ELV MLB  H40 0046 
   Serial number: 0215000188678006    

No fault code found.

-------------------------------------------------------------------------------
Address 08: Auto HVAC (J255)       Labels:| 4G0-820-043-4Z.clb
   Part No SW: 4G0 820 043 CC    HW: 4G0 820 043 CC
   Component: KLIMA 4 ZONEN H14 0112  
   Serial number: 08101500040560
   Coding: 36211178210000
   Shop #: WSC 02391 785 00200
   ASAM Dataset: EV_AirCondiComfoUDS 003008
   ROD: EV_AirCondiComfoUDS_003.rod
   VCID: 629D57C4E4CCBE37E81-8036

2 Faults Found:
0243 - Function Restriction due to Faults in Other Modules 
          U1113 00 [009] - -
          [Steuergerät für Bordnetz: Bitte Fehlerspeicher auslesen]
          Confirmed - Tested Since Memory Clear
             Freeze Frame:
                    Fault Status: 00000001
                    Fault Priority: 6
                    Fault Frequency: 1
                    Reset counter: 57
                    Mileage: 42778 km
                    Date: 2018.12.16
                    Time: 12:44:15

                    Voltage terminal 30: 11.65 V
                    Outside air temperature: 5.5 °C
                    Engine speed: 999 /min

0387 - Function Restriction due to Faults in Other Modules 
          U1113 00 [009] - -
          [Steuergerät für Bordnetz: Bitte Fehlerspeicher auslesen]
          Confirmed - Tested Since Memory Clear
             Freeze Frame:
                    Fault Status: 00000001
                    Fault Priority: 6
                    Fault Frequency: 211
                    Reset counter: 109
                    Mileage: 42778 km
                    Date: 2018.12.16
                    Time: 12:44:14

                    Voltage terminal 30: 11.34 V
                    Outside air temperature: 5.5 °C
                    Engine speed: 1017 /min


-------------------------------------------------------------------------------
Address 09: Cent. Elect. (J519)       Labels:. User\4H0-907-063-V2.clb
   Part No SW: 4H0 907 063 DH    HW: 4H0 907 063 AH
   Component: BCM1 2.0      H20 0311  
   Revision: 15020001    Serial number: 00001182453302
   Coding: 0105801440349FE0410140C0000018000F9DC3082F08020100000894E100150200400024030000
   Shop #: WSC 02391 785 00200
   VCID: 71BF288831AA15AF61B-8024

   Subsystem 1 - Part No SW: 4G2 955 119     HW: 4G8 955 119 A  Labels: 1KX-955-119.CLB
   Component: WWS57X 150715  H38 0080 
   Serial number:         150819223949
   Coding: 0045F7

   Subsystem 2 - Part No SW: 8U0 955 559 C    HW: 8U0 955 559 B  Labels: 8U0-955-559.CLB
   Component: G397_RLFS  H06 0004 
   Serial number: 20763505            
   Coding: 02006D

   Subsystem 3 - Part No SW: 4G0 941 531 BE    HW: 4G0 941 531 BE
   Component: E1 - LDS  H07 0044 
   Serial number: 13 10 2015  00000873

   Subsystem 4 - Part No SW: 4H0 907 658     HW: 4H0 907 658 
   Component: AQ_Hum_Sensor  H03 0003 
   Serial number: ED8880D7000000000001

1 Fault Found:
00256 - A/C Pressure/Temperature Sensor (G395) 
            004 - No Signal/Communication
             Freeze Frame:
                    Fault Status: 01100100
                    Fault Priority: 3
                    Fault Frequency: 1
                    Reset counter: 57
                    Mileage: 42778 km
                    Time Indication: 0
                    Date: 2018.12.16
                    Time: 12:44:15


-------------------------------------------------------------------------------
Address 15: Airbags (J234)       Labels:* 4H0-959-655.clb
   Part No SW: 4H0 959 655 H    HW: 4H0 959 655 H
   Component: Airbag10.43   H82 0086  
   Revision: --------    Serial number: 003P1006SWY0
   Coding: 30333130313730323737554A305234473053
   Shop #: WSC 02391 785 00200
   ASAM Dataset: EV_AirbaAU10BPAAU64X 001014
   ROD: EV_AirbaAU10BPAAU64X_VW51.rod
   VCID: 3B23CAA023E6AFFF8B7-806E

   Crash sensor for side airbag: driver side: 
   Serial number: 3575HRB40633JUD03OCK

   Crash sensor for side airbag: front passenger side: 
   Serial number: 3585HRB40573KGI0APDP

   Crash sensor for side airbag: rear: driver side: 
   Serial number: 3515JRB404T3JK6259MM

   Crash sensor for side airbag: rear: passenger side: 
   Serial number: 3525JRB40633FSTU6HIG

   Crash sensor for front airbag: driver side: 
   Serial number: 3554VRB400S553HED8T/

   Crash sensor for front airbag: front passenger side: 
   Serial number: 3564VRB400S553HED90D

No fault code found.

-------------------------------------------------------------------------------
Address 16: Steering wheel (J527)       Labels:. 4H0-953-568.clb
   Part No SW: 4H0 953 568 K    HW: 4H0 953 568 K
   Component: Lenks.Modul   H06 0005  
   Revision: C0068538    Serial number: 90862OJC00068 
   Coding: 000034
   Shop #: WSC 02391 785 00200
   VCID: 3B23CAA02366AFFF8B7-806E

   Subsystem 1 - Part No SW: 4G0 951 528 A    HW: 4G0 951 528 A
   Component: E221 - MFL  H08 0010 
   Serial number: 01 09 2015  C0002893

No fault code found.

-------------------------------------------------------------------------------
Address 17: Instruments (J285)       Labels:. 4H0-920-xxx-17.clb-SRI1
   Part No SW: 4G8 920 986 M    HW: 4G8 920 986 M
   Component: TDieGb        H11 0106  
   Revision: 07001088    Serial number: 658150915596041
   Coding: 23A70A000B412600010000
   Shop #: WSC 02391 785 00200
   ASAM Dataset: EV_RBD4K 004055
   ROD: EV_RBD4K.rod
   VCID: 42DDB744440CDE37C81-8016

No fault code found.

-------------------------------------------------------------------------------
Address 19: CAN Gateway (J533)       Labels: None
   Part No SW: 4G8 907 468 F    HW: 4G8 907 468 
   Component: J533--Gateway H14 0083  
   Revision: --------    Serial number: 00000002004092
   Coding: C0CD078118
   Shop #: WSC 02391 785 00200
   ASAM Dataset: EV_GatewPkoUDS 001028
   ROD: EV_GatewPkoUDS_001_AU57.rod
   VCID: 3B23CAA023E6AFFF8B7-806E

   Battery Monitoring Control Module: 
   Subsystem 1 - Part No SW: 8T0 915 181     HW: 8T0 915 181 
   Component: J367-BDMHella  H03 8041 
   Serial number: 1931577903          

   Voltage stabilizer: 
   Subsystem 2 - Part No SW: 8K0 959 663 F    HW: 8K0 959 663 F
   Component: J532_DCDCStab  H23 0022 
   Serial number: 150725000000000004E9

No fault code found.

-------------------------------------------------------------------------------
Address 20: High Beam Assist. (J844)       Labels: None
   Part No SW: 4H0 857 511     HW: 4H0 857 511 
   Component: FLA           H04 0021  
   Revision: AA001002    
   Coding: 04028264747464545425363E00
   Shop #: WSC 02391 785 00200
   VCID: 678B46D00F6EDB1F3FF-8032

No fault code found.

-------------------------------------------------------------------------------
Address 28: HVAC, Rear (E265)       Labels:* 4G0-919-158.clb
   Part No SW: 4G0 919 158 Q    HW: 4G0 919 158 Q
   Component: KLIMA FOND    H08 0112  
   Serial number: 09101500040125
   Coding: 22
   Shop #: WSC 02391 785 00200
   ASAM Dataset: EV_ClimaContrUnitRearUDS 003004
   ROD: EV_ClimaContrUnitRearUDS_003.rod
   VCID: 3D27C4B83DF2A1CFB53-8068

1 Fault Found:
0075 - Button or Switch in Operating Unit 
          B10C7 07 [008] - Mechanical Failure
          Intermittent - Confirmed - Tested Since Memory Clear
             Freeze Frame:
                    Fault Status: 00000001
                    Fault Priority: 2
                    Fault Frequency: 1
                    Reset counter: 149
                    Mileage: 45111 km
                    Date: 2019.02.04
                    Time: 15:44:27

                    Outside air temperature: 6.5 °C
                    Left rear vent temperature: 10.3 °C


-------------------------------------------------------------------------------
Address 3B: Sensor Elect. (J849)       Labels: 4G0-907-637.clb
   Part No SW: 4G0 907 637 H    HW: 4G0 907 637 D
   Component: SARA 3D       H04 0056  
   Revision: --------    Serial number: EJ1BPA720KW0DP
   Shop #: WSC 00000 000 00000
   ASAM Dataset: EV_SARA2 005012
   ROD: EV_SARA2.rod
   VCID: 3333E2800BB667BF537-8066

No fault code found.

-------------------------------------------------------------------------------
Address 42: Door Elect, Driver (J386)       Labels: None
   Part No SW: 4G8 959 793 J    HW: 4G8 959 793 G
   Component: TSG FA        H03 0511  
   Revision: --------    Serial number: --------------
   Coding: 011C16014001620002080002
   Shop #: WSC 02391 785 00200
   VCID: 47CBA6506FAEFB1F1FF-8012

No fault code found.

-------------------------------------------------------------------------------
Address 44: Steering Assist (J500)       Labels:| 4G0-909-144.clb
   Part No SW: 4G0 909 144 T    HW: 4G0 909 144 Q
   Component: RCevo         H53 0202  
   Revision: 00000002    Serial number: 0000283456
   Coding: 101000010001
   Shop #: WSC 02391 785 00200
   ASAM Dataset: EV_RCEPS 106007
   ROD: EV_RCEPS_106.rod
   VCID: 3A2DCFA42CDC96F7901-806E

No fault code found.

-------------------------------------------------------------------------------
Address 46: Central Conv. (J393)       Labels:. 4H0-907-064-46.clb
   Part No SW: 4H0 907 064 GN    HW: 4H0 907 064 GN
   Component: BCM2 2.0      H37 0572  
   Revision: 00002001    Serial number: 0382488804    
   Coding: 011F062280B90000C320080400010E470000000000000000000000000000
   Shop #: WSC 02391 785 00200
   VCID: 7BA30AA063E66FFFCB7-802E

   Subsystem 1 - Part No: 4G0 951 177 A
   Component: Sensor, DWA  005 0002 

   Subsystem 2 - Part No: 1K0 951 605 C
   Component: LIN BACKUP HO  H05 1501 

No fault code found.

-------------------------------------------------------------------------------
Address 52: Door Elect, Pass. (J387)       Labels: None
   Part No SW: 4G8 959 792 J    HW: 4G8 959 792 G
   Component: TSG BF        H03 0511  
   Revision: --------    Serial number: --------------
   Coding: 011C16014001620002080002
   Shop #: WSC 02391 785 00200
   VCID: 46D5AB5468A4E217E49-8012

No fault code found.

-------------------------------------------------------------------------------
Address 53: Parking Brake (----)       Labels: 4H0-907-801.clb
   Part No SW: 4H0 907 801 H    HW: 4H0 907 801 A
   Component: EPB-4         H04 0015  
   Revision: --------    Serial number: 00000001619448
   ASAM Dataset: EV_ParkiBrake 001028
   ROD: EV_ParkiBrake_VW51.rod
   VCID: 2D07F4F8ED92314F053-8078

No fault code found.

-------------------------------------------------------------------------------
Address 55: Headlight Range (J745)       Labels:| 4H4-907-357-V2.clb
   Part No SW: 4H4 907 357 E    HW: 7P6 907 357 B
   Component: MxB-ECU       001 0100  
   Revision: --------    Serial number: --------------
   Coding: 04FE02102A630200
   Shop #: WSC 02391 785 00200
   ASAM Dataset: EV_HeadlRegulAUDIMXBAU64X 005009
   ROD: EV_HeadlRegulAUDIMXBAU64X_005_AU57.rod
   VCID: 3431E19C0EB860874AD-8060

   Led Headlamp Powermodule Left: 
   Subsystem 1 - Part No SW: 7PP 941 472 J    HW: 7PP 941 472 J  Labels: 3D0-941-329.CLB
   Component: LED LeiMo li.  H07 7560 
   Coding: E01E00

   Led Headlamp Powermodule Right: 
   Subsystem 2 - Part No SW: 7PP 941 472 J    HW: 7PP 941 472 J  Labels: 3D0-941-329.CLB
   Component: LED LeiMo re.  H07 7560 
   Coding: E01E00

No fault code found.

-------------------------------------------------------------------------------
Address 5F: Information Electr. (J794)       Labels:* None
   Part No SW: 4G1 035 021 E    HW: 4G1 035 021 
   Component: MU-H-LND-EU   042 0335  
   Serial number: A588J0F7528209
   Coding: 017501010000000013111102000A00132F0006E7F1700100DF
   Shop #: WSC 02391 785 00200
   ASAM Dataset: EV_MUHig6C3Gen2HBAS 001115
   ROD: EV_MUHig6C3Gen2HBAS_AU57.rod
   VCID: 1C61293C8628C8C762D-8048

   Data medium: 
   Subsystem 1 - Part No SW: V03 959 801 FC    HW: -----------
   Component: ECE 2017  --- 0157 
   Serial number: --------------------

   Display unit 1 for multimedia system: 
   Subsystem 2 - Part No SW: 4G1 919 605 A    HW: 4G1 919 605 A
   Component: DU8 C7 SV  H63 0006 
   Serial number: AUZ8Z9FY802QD8      

   Multimedia Operating Unit: 
   Subsystem 3 - Part No SW: 4G2 919 610 F    HW: 4G2 919 610 F
   Component: E380 BDT C7  H20 0250 
   Serial number: 90349OJ6000EJ       

   Compact Disc Database: 
   Subsystem 4 - Part No SW: V03 959 800 EG    HW: -----------
   Component: Gracenote  --- 1010 
   Serial number: --------------------

No fault code found.

-------------------------------------------------------------------------------
Address 62: Door, Rear Left (J388)       Labels: None
   Part No SW: 4G8 959 795 J    HW: 4G8 959 795 G
   Component: TSG HL        H03 0511  
   Revision: --------    Serial number: --------------
   Coding: 010814004001620002080002
   Shop #: WSC 02391 785 00200
   VCID: 49CFA06879BA0D6F09B-801C

No fault code found.

-------------------------------------------------------------------------------
Address 72: Door, Rear Right (J389)       Labels: None
   Part No SW: 4G8 959 795 J    HW: 4G8 959 795 G
   Component: TSG HR        H03 0511  
   Revision: --------    Serial number: --------------
   Coding: 010814004001620002080002
   Shop #: WSC 02391 785 00200
   VCID: 49CFA06879BA0D6F09B-801C

No fault code found.

-------------------------------------------------------------------------------
Address A9: Struct. Borne Sound (J869)       Labels: 4H0-907-159.clb
   Part No SW: 4G0 907 159 D    HW: 4H0 907 159 A
   Component: SAS-GEN 2     H07 0007  
   Serial number: 151002203103
   ASAM Dataset: EV_SoundActuaGen2AU64X 003010
   ROD: EV_SoundActuaGen2AU64X.rod
   VCID: 2E05F3F4E0944A573C9-807A

No fault code found.

-------------------------------------------------------------------------------
Address AC: Reductant Control (J880)       Labels: 4G0-907-355.clb
   Part No SW: 4G0 907 355 G    HW: 4G0 907 355 B
   Component: SCR-Stg-G2    H10 0013  
   Revision: 00000000    Serial number: 152451062
   ASAM Dataset: EV_RDCMA00100 008040
   ROD: EV_RDCMA00100_008.rod
   VCID: 2F3BEEF0E79E435F37F-807A

No fault code found.

-------------------------------------------------------------------------------
Address C0: Act. for Ext. Noise (J943)       Labels: 4G0-907-160.clb
   Part No SW: 4G0 907 160 E    HW: 4G0 907 160 B
   Component: SAS-GEN 2 AGA H09 0011  
   Serial number: 151001200324
   ASAM Dataset: EV_ActuaForExterNoiseUDS 003013
   ROD: EV_ActuaForExterNoiseUDS.rod
   VCID: 270B06D0CF6E1B1FFFF-8072

No fault code found.

End----------(Elapsed Time: 02:05, VBatt start/end: 13.5V/14.4V)-----------
 
   #2  

Jack@European_Parts

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Check connectivity and LIN for proper function before changing the G395 sensor by testing with DVOM and WD in the RTFB.
 
   #3  

Jef

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I made this image, I'm going to use it:

G8YGwbm.jpg


G395
  • /1 ground
  • /2 LIN Bus Data to J519
  • /3 Power (Terminal 15)

Have you verified those are to factory design?

G395 uses a LIN Bus for the Data. Other items can be on that same LIN Bus and screw up communication. Looking at your VIN in Partslink24, no garage door opener, no vented seats. I've seen a lot of garage door openers screw the LIN Bus over... but since your car doesn't have it, rule that out. The only other sensor that might be on the LIN Bus would be an air quality or humidity sensor, but I don't see codes for that.... so, back to the Holy Trinity.

1 Fault Found:
0075 - Button or Switch in Operating Unit
B10C7 07 [008] - Mechanical Failure
Intermittent - Confirmed - Tested Since Memory Clear
I suspect maybe a button was sticking. Clear it out, if it comes back then put more effort into it, but I'd not be concerned if it clears out.
 
   #4  

Uwe

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I’m about to go order a new G395 sensor to hopefully resolve the error on module 09. It looks to me that whatever those errors on module 8 are, they might also be resolved by replacing the faulty sensor on module 9.
I think there's a good chance of that.

However, do you think the error in module 28 may also be due to the potentially faulty G395 sensor on module 9?
My guess is: No.

ps I didn’t update to the latest SW version last night before I canned as I wasn’t sure if the experimental clb files Dana sent me in November would be affected.
If they're in your User sub-folder (one level down from Labels), they should be unaffected, but make a backup copy of them someplace else, just in case.

-Uwe-
 
   #5  

gdallas

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well I took a gamble and replaced the sensor with a new OEM version today. I thought this would be the path of least resistance. disappointingly the gamble didn't however pay off. The faults persist. When you clear the sensor fault it reappears instantly every single time. Back to the drawing board I go. there is no value being measured in adv measuring block, just a - symbol.
 
   #6  

Jack@European_Parts

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Shame shame....that is like not checking fuses or doing the JPPSG?

Is that part replaced with possible FOD?
 
   #7  

gdallas

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As I said, I took a gamble on the path of least resistance for me personally. I do not have any wiring diagrams to help me check continuity, nor do I know which fuse terminal feeds this. I hoped replacement would be a quick 5 min fix, rather than finding diagrams and doing some proper mandrolic fault finding.

where would one find said wiring diagrams does anyone know?
 
   #13  

Uwe

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Cheers bud. The rest of world link doesn't however work 😕
Hmm, the erwin-portal site does indeed seem to be down. :facepalm:

-Uwe-
 
   #14  

gdallas

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So, I bought the Erwin manuals and have been outside most of the day trying to diagnose without success, though I’m closing in for sure!
I have verified that the plug at G395 senor end has a healthy supply/ground. Therefore, I can only assume that the issue lies somewhere with the LIN cable between J519 and G395.

I was somewhat surprised by the current flow diagrams in Erwin. Given that I have a right-hand drive car, and the G395 is on the left-hand side of the car in front of the radiator. LIN cable from the sensor allegedly goes to socket T17o, pin 16 (RIGHT A PILLAR coupling station), then from T17i pin 16, (LEFT A PILLAR coupling station) to Socket C pin 4 of the J519 controller which is back on the Right side! Like a big zig zag across the car. Seemed odd to me given this is (presumably) a multidropable protocol.

Anyway, I managed to remove passenger side A/B pillar trim to expose the T17i pin 16, (LEFT A PILLAR coupling station). With my DVM attached to the LIN pin at the G395 plug, and the other end attached to the pin 16 on T17i (LEFT A PILLAR coupling station), I failed to get continuity. I spent a good while trying to locate the J519 module, but as I write this, I think I will park that investigation for now as the issue appears to reside either:
- Wiring between the coupling stations
- or wiring between T17o, pin 16 (RIGHT A PILLAR coupling station) and the G395 sensor.

It became too cold and windy to continue ripping trim off, so I will continue my efforts tomorrow.
Meanwhile, if anyone can advise where the J519 is located, that would be useful, as I cannot tell exactly its location from Erwin, other than drivers’ side, under dash. See pic attached.

Thanks All.
 
   #15  

Jack@European_Parts

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So, I bought the Erwin manuals and have been outside most of the day trying to diagnose without success, though I’m closing in for sure!
I have verified that the plug at G395 senor end has a healthy supply/ground. Therefore, I can only assume that the issue lies somewhere with the LIN cable between J519 and G395.

I was somewhat surprised by the current flow diagrams in Erwin. Given that I have a right-hand drive car, and the G395 is on the left-hand side of the car in front of the radiator. LIN cable from the sensor allegedly goes to socket T17o, pin 16 (RIGHT A PILLAR coupling station), then from T17i pin 16, (LEFT A PILLAR coupling station) to Socket C pin 4 of the J519 controller which is back on the Right side! Like a big zig zag across the car. Seemed odd to me given this is (presumably) a multidropable protocol.

Anyway, I managed to remove passenger side A/B pillar trim to expose the T17i pin 16, (LEFT A PILLAR coupling station). With my DVM attached to the LIN pin at the G395 plug, and the other end attached to the pin 16 on T17i (LEFT A PILLAR coupling station), I failed to get continuity. I spent a good while trying to locate the J519 module, but as I write this, I think I will park that investigation for now as the issue appears to reside either:
- Wiring between the coupling stations
- or wiring between T17o, pin 16 (RIGHT A PILLAR coupling station) and the G395 sensor.

It became too cold and windy to continue ripping trim off, so I will continue my efforts tomorrow.
Meanwhile, if anyone can advise where the J519 is located, that would be useful, as I cannot tell exactly its location from Erwin, other than drivers’ side, under dash. See pic attached.

Thanks All.


Beware of shared components on the LIN track BUS and that the G395 sensor you replaced is the correct part number, to avoid FOD!

eTu9lha.png
 
   #16  

gdallas

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Im admitting defeat. I couldn't get a buzz from my DVM whilst checking for continuity on the LIN between the sensor and the coupling station, nor between both coupling stations. The wiring looked visually OK. No clue why it wouldn't buzz. Very frustrated now!
 
   #17  

Jack@European_Parts

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Im admitting defeat. I couldn't get a buzz from my DVM whilst checking for continuity on the LIN between the sensor and the coupling station, nor between both coupling stations. The wiring looked visually OK. No clue why it wouldn't buzz. Very frustrated now!


Don't give up, post the LIN tracks in WD in screen shots and let's trace it together!

Isolate other components on the LIN by unplugging them and verifying what one is causing an open or if an overlay tests good.

If it were me I'd go check the rain/photo sensor first!
 
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gdallas

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How would I determine all sensors on the LIN. Would my Erwin manuals help? By disconnecting each in turn, what will that achieve? I don't quite understand.
Thanks
 
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Jack@European_Parts

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How would I determine all sensors on the LIN. Would my Erwin manuals help? By disconnecting each in turn, what will that achieve? I don't quite understand.
Thanks


LIN is single wire communication and when a wire is possibly down or a another sensor is faulty sharing the track can bring the entire data bus loop down for those components.

In addition to the RTFB maybe have a read of this thread & watch these videos here:

https://forums.ross-tech.com/showth...-you-should-have-a-baseline-understanding-of-!
 
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   #20  

gdallas

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Morning mate, I've had a thought. What if I were to swap the g395 and g238 to rule out this new part isn't indeed faulty too, plus this should confirm if there is an issue with the wiring should VCDS start reporting that G395 is now healthy, whilst G238 is bad? Is it possible to do that? Both of these sensors appear to have the same/similar 3 pin plug, albeit with a slightly different pinout, are on the same bus back to j519 and are fed by the same power supply. The only difference I can see is that the G395 first utilises the coupling station route for my car (RHD). I could fashion a couple of jumpers to allow me to interface the G395 with the plug intended for the G238

Welcome your thoughts. Cheers

link to wiring diagram. https://flic.kr/p/QWesD4
 
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