Canbus issues with android head unit

[PeetB_]

Hi everyone, a couple of months ago I installed a new android head unit in my t5.1 (I know this is a T6 forum but i've been looking for a solution for months now, so I hope you guys could maybe help me) but I've had issues since the beginning. The T5.1 won't work with any CANBUS radio for some reason. I've tried the same head unit in my Polo and it works flawlessly. The biggest issues are that the head unit doesn't turn on via canbus, gives no parking sensor information ect. It also gives 2 canbus errors when I connect my VCDS (00470 & 01336, see image) both related to electrical faults.

The weird thing is that the T5.1 came with a Pioneer Avic F9310BT from the dealer, which also worked via canbus since there is no switched 12v wire on the quadlock radio plug and the parking sensors are OEM but the pioneer still gives a visualisation of that. I tried so many different things, like using the pioneer canbus adapter etc. But i couldn't figure it out. Has it got something to do with the coding? The T5.1 is long out of warranty and I'm not planning on spending hundreds of euros to have a VW dealer just look at it.

I hope some of you guys can help!

 

[Robert]

Can you post your complete VCDS Autoscan?

 

[PeetB_]

Chassis Type: 7H-VN75 (6N0)
Scan: 01 02 03 04 08 09 10 15 17 19 25 69 0B

VIN: ***************   Mileage: 164810km-102408miles

01-Engine -- Status: Malfunction 0010
02-Auto Trans -- Status: OK 0000
03-ABS Brakes -- Status: Malfunction 0010
04-Steering Angle -- Status: OK 0000
08-Auto HVAC -- Status: OK 0000
09-Cent. Elect. -- Status: Malfunction 0010
10-Park/Steer Assist -- Status: Malfunction 0010
15-Airbags -- Status: OK 0000
17-Instruments -- Status: OK 0000
19-CAN Gateway -- Status: Malfunction 0010
25-Immobilizer -- Status: OK 0000
56-Radio -- Status: Malfunction 0010
69-Trailer -- Status: OK 0000
 
-------------------------------------------------------------------------------
Address 01: Engine (J623-CFCA)       Labels:. 03L-906-022-CFC.clb
   Part No SW: 03L 906 022 JD    HW: 03L 907 309 H
   Component: R4 2,0L EDC   H35 9970 
   Revision: 22H35---    Serial number: 00000000000000
   Coding: 01254012232400080000
   Shop #: WSC 41242 001 1048576
   ASAM Dataset: EV_ECM20BTD01103L906022JD 002013
   ROD: EV_ECM20BTD01103L906022JD_002.rod
   VCID: 70EF65C7ABA31ACF57-8024

2 Faults Found:
5456 - Starter Will Not Turn
          P3054 00 [101] - Jammed or Electrical Malfunction
          Not Confirmed - Tested Since Memory Clear
             Freeze Frame:
                    Fault Status: 00000001
                    Fault Priority: 2
                    Fault Frequency: 1
                    Mileage: 0 km
                    Date: 2021.04.07
                    Time: 15:42:26

                    Engine speed: 0.00 /min
                    Normed load value: 0.0 %
                    Vehicle speed: 0 km/h
                    Coolant temperature: 30 ∞C
                    Intake air temperature: 13 ∞C
                    Ambient air pressure: 990 mbar
                    Voltage terminal 30: 6.340 V
                    Unlearning counter according OBD: 40
                    Starter control: terminal 50 acknowledgment-Bits 0-7: 48
                    Starter control: relay 1-Bits 0-7: 3
                    Starter control: shut-off conditions 1-Bits 0-7: 0
                    Starter control: shut-off conditions 1-Bits 0-7: 0
                    Number of manual engine starts-Bits 0-7: 0
                    Number of manual engine starts-Bits 0-7: 0
                    Number of manual engine starts-Bits 0-7: 0
                    Number of manual engine starts-Bits 0-7: 82
                    Number of automatic engine starts-Bits 0-7: 0
                    Number of automatic engine starts-Bits 0-7: 0
                    Number of automatic engine starts-Bits 0-7: 0
                    Number of automatic engine starts-Bits 0-7: 0

4708 - No Communications with HVAC Control Module (J301)
          U0164 00 [032] - -
          Intermittent - Not Confirmed - Tested Since Memory Clear
             Freeze Frame:
                    Fault Status: 00000001
                    Fault Priority: 6
                    Fault Frequency: 2
                    Mileage: 164691 km
                    Date: 2021.04.19
                    Time: 10:45:02

                    Engine speed: 1035.00 /min
                    Normed load value: 67.5 %
                    Vehicle speed: 1 km/h
                    Coolant temperature: 52 ∞C
                    Intake air temperature: 13 ∞C
                    Ambient air pressure: 990 mbar
                    Voltage terminal 30: 11.360 V
                    Unlearning counter according OBD: 38
                    Limitation: accelerator pedal: 0.0 Nm
                    CAN status - engine control module-Bits 0-7: 0
                    Cruise Control System (CCS): status-Bits 0-7: 47
                    CAN status - transmission control module-Bits 0-7: 0
                    CAN status - brake control module 1-Bits 0-7: 0
                    CAN status - brake control module 2-Bits 0-7: 0
                    selected gear-Bits 0-7: 0

Readiness: 0 0 0 0 0

-------------------------------------------------------------------------------
Address 02: Auto Trans (J743)       Labels:. 0BH-927-711.clb
   Part No SW: 0BT 300 045 M    HW: 0BH 927 711 C
   Component: DSG DQ500-7F  H05 1710 
   Revision: 00H05V01   
   Coding: 0014
   Shop #: WSC 00000 000 00000
   ASAM Dataset: EV_TCMDQ500021 001001
   ROD: EV_TCMDQ500021_VW36.rod
   VCID: 3F8DF6FBA67DB5B79E-806A

No fault code found.

-------------------------------------------------------------------------------
Address 03: ABS Brakes (-----)       Labels: 7E0-907-37x-MK25AXT.clb
   Part No SW: 7E0 907 379 H    HW: 7E0 907 379 E
   Component: ESP MK25A XT  H43 0107 
   Revision: 00H43001   
   Coding: 208764AD09A6049826A890776A6510
   Shop #: WSC 02756 790 49152
   VCID: 377D9EDB864D8DF756-8062

1 Fault Found:
00668 - Supply Voltage Terminal 30
            002 - Lower Limit Exceeded - Intermittent
             Freeze Frame:
                    Fault Status: 00100010
                    Fault Priority: 1
                    Fault Frequency: 1
                    Reset counter: 109
                    Mileage: 164062 km
                    Time Indication: 0
                    Date: 2015.08.29
                    Time: 15:42:46

             Freeze Frame:
                    Count: 16576
                    Count: 2305
                    Count: 128
                    Count: 764


-------------------------------------------------------------------------------
Address 08: Auto HVAC (J301)       Labels:| 7E5-907-047.clb
   Part No SW: 7E5 907 047 BB    HW: 7E5 907 047 BB
   Component: Climatic-T5   H19 0404 
   Revision: 00001008   
   Coding: 0000000002
   Shop #: WSC 02756 790 50316
   ASAM Dataset: EV_ClimaticT5 A01003
   ROD: EV_ClimaT5Basis.rod
   VCID: 70EF65C7ABA31ACF57-8024

No fault code found.

-------------------------------------------------------------------------------
Address 09: Cent. Elect. (J519)       Labels:. 7H0-937-08x-09.clb
   Part No SW: 7H0 937 089 F    HW: 7H0 937 089
   Component: BCM T5GP Li4  H50 0251 
   Revision: BS050001    Serial number: 0465 201111003
   Coding: 22A0393A0E21200201200E706EEB8ED48280610F60846841300000000000
   Shop #: WSC 02756 790 00000
   VCID: 397998E3B0599B87A0-806C

   Subsystem 1 - Part No: 1K0 955 559 AH  Labels: 1K0-955-559-AG.CLB
   Component: RLS 140711 05  54  0403
   Coding: 02302E

   Subsystem 2 - Part No SW: 7E0 959 801 A    HW: 7E0 959 801 A  Labels: 7E0-959-80X-V1.CLB
   Component: J386__TSG_FT  003 3311
   Serial number: --------------------
   Coding: 040000

   Subsystem 3 - Part No SW: 7E0 959 802 A    HW: 7E0 959 802 A  Labels: 7E0-959-80X-V1.CLB
   Component: J387__TSG_BT  003 3311
   Serial number: --------------------
   Coding: 040000

3 Faults Found:
03301 - Response Closing Status of Drivers Door
            008 - Implausible Signal
             Freeze Frame:
                    Fault Status: 01101000
                    Fault Priority: 2
                    Fault Frequency: 1
                    Reset counter: 85
                    Mileage: 164817 km
                    Time Indication: 0
                    Date: 2015.09.16
                    Time: 11:11:24

00532 - Supply Voltage B+
            002 - Lower Limit Exceeded - Intermittent
             Freeze Frame:
                    Fault Status: 00100010
                    Fault Priority: 3
                    Fault Frequency: 1
                    Reset counter: 109
                    Time Indication: 0

00446 - Function Limitation due to Under-Voltage
            002 - Lower Limit Exceeded - Intermittent
             Freeze Frame:
                    Fault Status: 00100010
                    Fault Priority: 6
                    Fault Frequency: 2
                    Reset counter: 109
                    Mileage: 0 km
                    Time Indication: 0
                    Date: 2015.08.29
                    Time: 15:41:56


-------------------------------------------------------------------------------
Address 10: Park/Steer Assist (J446)       Labels:| 7E0-919-475.clb
   Part No SW: 7E0 919 475 D    HW: 7E0 919 475
   Component: PARKHILFE 4K  H11 0013 
   Revision: --------    Serial number: 24531104102343
   Coding: 108101
   Shop #: WSC 02756 790 50316
   ASAM Dataset: EV_VW75XParkAssis4K A01006
   ROD: EV_VW75XParkAssis4K_A01.rod
   VCID: 3365AACB9A3561D76A-8066

1 Fault Found:
13893632 - Function Restricted due to Insufficient Voltage
          U1400 00 [008] - -
          [New feature! Extended UDS fault detail is only supported by current gen. interfaces]
          Intermittent - Confirmed - Tested Since Memory Clear
             Freeze Frame:
                    Fault Status: 00000001
                    Fault Priority: 6
                    Fault Frequency: 1
                    Reset counter: 109
                    Mileage: 0 km
                    Date: 2000.00.00
                    Time: 00:00:00


-------------------------------------------------------------------------------
Address 15: Airbags (J234)       Labels:| 5K0-959-655.clb
   Part No SW: 7E0 959 655 B    HW: 7E0 959 655 B
   Component: VW10Airbag003 H06 0013 
   Revision: --------    Serial number: 003HL006JG0$
   Coding: 000000000000000000000000000000003033
   Shop #: WSC 02754 790 50316
   ASAM Dataset: EV_AirbaVW10BPAVN750 A01026
   ROD: EV_AirbaVW10BPAVN750_VW12.rod
   VCID: 356194D394417FE744-8060

No fault code found.

-------------------------------------------------------------------------------
Address 17: Instruments (J285)       Labels:| 5K0-920-xxx-17.clb-SRI1
   Part No SW: 7E0 920 870 E    HW: 7E0 920 870 E
   Component: KOMBI         H04 0305 
   Serial number: 00000000000000
   Coding: 160900
   Shop #: WSC 02756 790 50316
   ASAM Dataset: EV_Kombi_UDS_VDD_RM09 A04113
   ROD: EV_Kombi_UDS_VDD_RM09_004_VW32.rod
   VCID: 2B55B2AB4205391722-807E

No fault code found.

-------------------------------------------------------------------------------
Address 19: CAN Gateway (J533)       Labels:. 6N0-909-901-6R.clb
   Part No SW: 6N0 909 901     HW: 7H0 937 089
   Component: GW-K-CAN TP20 H50 0251 
   Revision: BS050001   
   Coding: 042200
   Shop #: WSC 02756 790 00000
   VCID: 70EF65C7A3A31ACF57-8024

2 Faults Found:
00470 - Company Comfort Databus in Single Wire
            012 - Electrical Fault in Circuit - Intermittent
             Freeze Frame:
                    Fault Status: 00101100
                    Fault Priority: 2
                    Fault Frequency: 254
                    Reset counter: 125
                    Mileage: 163802 km
                    Time Indication: 0
                    Date: 2015.08.18
                    Time: 14:23:30

01336 - Company Data Bus for Comfort System
            014 - Defective - Intermittent
             Freeze Frame:
                    Fault Status: 00101110
                    Fault Priority: 1
                    Fault Frequency: 2
                    Reset counter: 123
                    Mileage: 164338 km
                    Time Indication: 0
                    Date: 2015.09.06
                    Time: 17:59:23


-------------------------------------------------------------------------------
Address 25: Immobilizer (J334)       Labels:| 5K0-920-xxx-25.clb
   Part No SW: 5K0 953 234     HW: 5K0 953 234
   Component: IMMO          H04 0305 
   Serial number:               
   Coding: 000000
   Shop #: WSC 00000 000 00000
   ASAM Dataset: EV_Immo_UDS_VDD_RM09 A03009
   ROD: EV_Immo_UDS_VDD_RM09.rod
   VCID: 6ADB77AF8D7FE01F19-803E

No fault code found.

-------------------------------------------------------------------------------
Address 69: Trailer        Labels: RETROFIT69.lbl
   Part No SW: SW0 408     HW: 5F0 07V 010 1
   Component: TOWBARMODULE ECS    0010 
   Coding: 0000001
   Shop #: WSC 00000 000 00000
   VCID: 76E353DF01C734FF8D-8022

No fault code found.

End-------------------------(Elapsed Time: 02:51)--------------------------

 

[PeetB_]

Could it be that I blew a fuse on the canbus system? Every time I connect the canbus decoder for the android head unit I hear clicking from the dashboard like some sort of relais...

 

[Robert]

Which CAN-BUS did you connect to?
Looks to me like bad connection.
Have you got any photos of your wiring?

 

[Dav-Tec]

Also what's your battery like as I've had it before with one van a similar fault on can bus and it was the battery.

That said have you checked (obviously with the battery disconnected that you don't have any short circuits between can hi and can low for each can network and obviously no shorts between networks?

Where are you located matey

 

[PeetB_]

Which CAN-BUS did you connect to?
Looks to me like bad connection.
Have you got any photos of your wiring?

I connected to the regular Canbus wires on the quad lock radio plug. I don't have any photos for now though. I checked the wiring and everything seems to match (apart from the 12v switched wire that isn't present). Is there any way I can check for canbus shorts?

 

[PeetB_]

Also what's your battery like as I've had it before with one van a similar fault on can bus and it was the battery.

That said have you checked (obviously with the battery disconnected that you don't have any short circuits between can hi and can low for each can network and obviously no shorts between networks?

Where are you located matey

The battery is kinda bad, but should that explain why the old head unit works with canbus and the new one doesn't? How do I measure short circuits on the canbus? just the probes on the Hi and Lo end on the same plug?

Oh and I'm located in the Netherlands...

 

[Robert]

This is different make of a vehicle
but easily explaines CAN bus network principles.
Just watch it and it should help you with diagnostics.

 

[PeetB_]

This different make of a vehicle
but easily explaines CAN bus network principles.
Just watch it and it should help you with diagnostics.

thanks!

 

[PeetB_]

I think I found the issue. The driver side door (left door since I'm from the Netherlands) doesn't register as open when opened (interior lights don't turn on and the van locks itself after a minute because it hasn't registered that a door was opened. This leads me to believe that there is a fault in the wiring there causing the canbus to go in single wire mode. The android head unit only uses the high signal, so if that signal is not active due to the single wire mode it explains the problems.

Are there any fuses in the canbus system that can break? I'm going to check the wiring loom in the door next week. If there is a wire that is broken, can I solder that back together? Or is it better to replace the entire door wiring loom since canbus is data and not just 12v power?

thanks for all the help so far guys! I really really appreciate the effort!

 

[Dav-Tec]

This could easily be a red herring and a door switch not functioning causing the lights not to come on.

Does VCDS see any of the door module. My first place to check would be the rubber duct from the door to the chassis common for wires to break there it unplugs from the chassis wlso easy to check. If you use heat shrink soldering the wire if it is broken is fine.

 

[PeetB_]

This could easily be a red herring and a door switch not functioning causing the lights not to come on.

Does VCDS see any of the door module. My first place to check would be the rubber duct from the door to the chassis common for wires to break there it unplugs from the chassis wlso easy to check. If you use heat shrink soldering the wire if it is broken is fine.

Thanks! I will check for that this week. So a faulty door wiring loom could be the culprit of all my issues? Oh how I love my old ‘71 Opel GT where the most technological thing is the dashboard light dimming switch

 

[Dav-Tec]

Thanks! I will check for that this week. So a faulty door wiring loom could be the culprit of all my issues? Oh how I love my old ‘71 Opel GT where the most technological thing is the dashboard light dimming switch

Yes it is possible because shorting the canbus wires out can interfere with the rest of the canbus network.

It woukd explain the comfort canbus issue. Usually there is 3 canbus networks. Infotainment, Powertrain and Comfort that all link together in the gateway.

 

[PeetB_]

Ok thanks so much guys! I'll report when I ruled out the issues!