Trailer not working fault code 00532

[alike]

Hi. So i had my car on EU periodic control, and the mechanic gave me feedback that the trailer connection was not working correctly.

I got Touran 2008 model with original vw trailer module:

 Address 69: Trailer       Labels: 1K0-907-383-V2.clb
Control Module Part Number: 1K0 907 383 E    HW: 1K0 907 383 E
  Component and/or Version: Anhaenger     H07 0050
           Software Coding: 0100000100000000
            Work Shop Code: WSC 00000 000 00000
                      VCID: 2F549EB47EEDD1370C-807A

After checking old fault codes i got this:

00532 - Supply Voltage B+ 
            011 - Open Circuit - Intermittent - MIL ON
             Freeze Frame:
                    Fault Status: 10101011
                    Fault Priority: 3
                    Fault Frequency: 15
                    Reset counter: 122
                    Mileage: 127944 km
                    Time Indication: 0
                    Date: 2000.00.00
                    Time: 18:25:17

Milage now is like 228 000 km. i reseted this fault code.

After checking connections on the trailer socket i didnt get any voltages out when testing left/right signal. Something was wrong. So i checked further....

I checked the fuses related to trailer and there was one blown 20A fuse for the F40 trailer detection control unit. I replaced it with a new one and used the 69-trailer 03 output tests to generate volts for each signal and other tests. All of the tests where found to be OK after testing each with output test. However, i dont have trailer and i cant test it to be sure its working. Can i be sure that if these output tests generate 12volts connecting to correct place with mulitmeter, will it also work when connected to any electrically working trailer?

One more thing. I think i get lower volts than the battery itself when testing, showing just 11.46 volts in trailer socket. And also another weird thing, there is constantly 1.76 volts on each output when there is no signal. Can this be sign of some trouble? Some earth leakage or something?

BTW in case there si a need for it, here is my complete auto diag:

Monday,02,March,2020,11:09:54:61597
VCDS -- Windows Based VAG/VAS Emulator Running on Windows 10 x64
VCDS Version: 19.6.2.2 (x64)
Data version: 20200210 DS308.0
www.Ross-Tech.com


VIN: WVGZZZ1TZ9W005714   License Plate: 


Chassis Type: 1T (1K0)
Scan: 01 03 08 09 15 16 17 18 19 25 42 44 46 52 56 69

VIN: WVGZZZ1TZ9W005714   Mileage: 228590km-142039miles

01-Engine -- Status: OK 0000
03-ABS Brakes -- Status: OK 0000
04-Steering Angle -- Status: OK 0000
08-Auto HVAC -- Status: OK 0000
09-Cent. Elect. -- Status: Malfunction 0010
15-Airbags -- Status: OK 0000
16-Steering wheel -- Status: OK 0000
17-Instruments -- Status: OK 0000
18-Aux. Heat -- Status: OK 0000
19-CAN Gateway -- Status: OK 0000
25-Immobilizer -- 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
56-Radio -- Status: OK 0000
69-Trailer -- Status: OK 0000
 
-------------------------------------------------------------------------------
Address 01: Engine        Labels: 03G-906-021-BLS.clb
   Part No SW: 03G 906 021 RN    HW: 03G 906 021 AB
   Component: R4 1,9L EDC G000SG  1989  
   Revision: --H08---    Serial number: VWX7Z0H43NE08V
   Coding: 0000072
   Shop #: WSC 00440 218 194275
   VCID: 7CCE79F83F1BFAAFF9-8028

No fault code found.
Readiness: 0 0 0 0 1 

-------------------------------------------------------------------------------
Address 03: ABS Brakes        Labels: 1K0-907-379-MK60-F.lbl
   Part No SW: 1K0 907 379 AC    HW: 1K0 907 379 AC
   Component: ESP FRONT MK60      0101  
   Revision: 00H11001    
   Coding: 0021190
   Shop #: WSC 01324 785 00200
   VCID: 73DC52C41245B5D7A8-8026

No fault code found.

-------------------------------------------------------------------------------
Address 08: Auto HVAC        Labels: 1K0-907-044.lbl
   Part No SW: 1K0 907 044 DA    HW: 1K0 907 044 DA
   Component: ClimatronicPQ35 130 1213  
   Revision: 00130023    Serial number: 00000000000000
   Shop #: WSC 00000 000 00000
   VCID: 69E030AC40897F0712-803C

No fault code found.

-------------------------------------------------------------------------------
Address 09: Cent. Elect.        Labels:. 3C0-937-049-30-M.lbl
   Part No SW: 3C8 937 049 D    HW: 3C8 937 049 D
   Component: Bordnetz-SG     H54 2602  
   Revision: 00H54000    Serial number: 00000008487102
   Coding: 088B8F2100040F0047120C000000000000087B075C000120000000000000
   Shop #: WSC 01324 785 00200
   VCID: 325297C0ADDFFCDF63-8066

   Subsystem 1 - Part No: 2K1 955 119 C  Labels: 1KX-955-119.CLB
   Component: Wischer 140508 021  0501  
   Coding: 00038805
   Shop #: WSC 01324  

1 Fault Found:
01504 - Bulb for License-Plate Light (X) 
            012 - Electrical Fault in Circuit
             Freeze Frame:
                    Fault Status: 01101100
                    Fault Priority: 2
                    Fault Frequency: 1
                    Reset counter: 87
                    Mileage: 228591 km
                    Time Indication: 0

             Freeze Frame:
                        ON
                    Voltage: 11.85 V
                        ON
                        ON
                        OFF
                        OFF
                        OFF


-------------------------------------------------------------------------------
Address 15: Airbags        Labels: 1T0-909-605.lbl
   Part No SW: 1T0 909 605 D    HW: 1T0 909 605 D
   Component: 04 AIRBAG VW8   021 0100  
   Revision: 02021000    Serial number: 003B9D096S81  
   Coding: 0012340
   Shop #: WSC 01324 785 00200
   VCID: 365AABD041B7E0FF4F-8062

   Subsystem 1 - Serial number: 6332QSME67321F29K

   Subsystem 2 - Serial number: 6342QSME624B1A05F

   Subsystem 3 - Serial number: 6352QSME594F1475R

   Subsystem 4 - Serial number: 6362QSME594F793D0

No fault code found.

-------------------------------------------------------------------------------
Address 16: Steering wheel        Labels: 1K0-953-549-MY8.lbl
   Part No SW: 1K0 953 549 BN    HW: 1K0 953 549 BN
   Component: J0527           752 0101  
   Coding: 0000042
   Shop #: WSC 01324 785 00200
   VCID: 7F348EF42E0DE1B7DC-802A

No fault code found.

-------------------------------------------------------------------------------
Address 17: Instruments        Labels: 1K0-920-xxx-17.lbl
   Part No SW: 1T0 920 864 A    HW: 1T0 920 864 A
   Component: KOMBIINSTRUMENT VDD 1212  
   Revision: V0002000    Serial number: VWX7Z0H43NE08V
   Coding: 0007101
   Shop #: WSC 52376 001 1048576
   VCID: 335C92C452C5F5D768-8066

No fault code found.

-------------------------------------------------------------------------------
Address 18: Aux. Heat        Labels: 1K0-815-071.clb
   Part No: 1K0 815 071 T
   Component: Zuheizer        050 2504  
   Revision: 00050000    Serial number: 09009839000000
   Coding: 0000011
   Shop #: WSC 52376 001 1048576
   VCID: 365AABD041B7E0FF4F-8062

No fault code found.

-------------------------------------------------------------------------------
Address 19: CAN Gateway        Labels:. 1K0-907-530-V3.clb
   Part No SW: 1K0 907 530 Q    HW: 1K0 907 951 
   Component: J533  Gateway   H07 0062  
   Revision:   H07 01    Serial number: 230508F2001595
   Coding: E9801F46000A028002
   Shop #: WSC 01324 785 00200
   VCID: 3558ACDC5CB1EBE746-8060

No fault code found.

-------------------------------------------------------------------------------
Address 25: Immobilizer        Labels: 1K0-920-xxx-25.clb
   Part No SW: 1T0 920 864 A    HW: 1T0 920 864 A
   Component: IMMO            VDD 1212  
   Revision: V0002000    Serial number: VWX7Z0H43NE08V
   Shop #: WSC 00000 000 00000
   VCID: 335C92C452C5F5D768-8066

No fault code found.

-------------------------------------------------------------------------------
Address 42: Door Elect, Driver        Labels:. 1K0-959-701-MIN3.clb
   Part No SW: 1T0 959 701 M    HW: 1T0 959 701 M
   Component: Tuer-SG         008 2007  
   Coding: 0000053
   Shop #: WSC 01324 785 00200
   VCID: 41B0C80C18795747EA-8014

No fault code found.

-------------------------------------------------------------------------------
Address 44: Steering Assist        Labels: 1K0-909-14x-GEN3.clb
   Part No: 1K0 909 144 C
   Component: EPS_ZFLS Kl. 70     2301  
   Revision: 00H15000    
   Shop #: WSC 01324 785 00200
   VCID: 2A628FA0850FB41FDB-807E

No fault code found.

-------------------------------------------------------------------------------
Address 46: Central Conv.        Labels:. 1K0-959-433-MIN.clb
   Part No: 1K0 959 433 CP
   Component:    KSG              0401  
   Coding: 80C8020C7F2D8405484B036010CC
   Shop #: WSC 01324 785 00200
   VCID: 00360D0853F39E4FA5-8054

   Subsystem 1 - Component:   Sounder n.mounted     

   Subsystem 2 - Component:       NGS n.mounted     

   Subsystem 3 - Component:      IRUE n.mounted     

No fault code found.

-------------------------------------------------------------------------------
Address 52: Door Elect, Pass.        Labels:. 1K0-959-702-MIN3.clb
   Part No SW: 1T0 959 702 M    HW: 1T0 959 702 M
   Component: Tuer-SG         007 2007  
   Coding: 0000053
   Shop #: WSC 01324 785 00200
   VCID: 42B2C7001D7F4C5FF3-8016

No fault code found.

-------------------------------------------------------------------------------
Address 56: Radio        Labels: None
   Part No SW: 3TD 035 156     HW: 3TD 035 156 
   Component: RadioSK46MID  006 0010  
   Coding: 01000424041000
   Shop #: WSC 00078 790 00000
   VCID: 7F348EF4EE0DE1B7DC-802A

No fault code found.

-------------------------------------------------------------------------------
Address 69: Trailer (J345)       Labels:. 1K0-907-383-V2.clb
   Part No SW: 1K0 907 383 E    HW: 1K0 907 383 E
   Component: Anhaenger     H07 0050  
   Revision: 3A002002    Serial number: 00000111882866
   Coding: 0100000100000000
   Shop #: WSC 00000 000 00000
   VCID: 2F549EB47EEDD1370C-807A

No fault code found.

End-------------------------(Elapsed Time: 01:09)--------------------------

 

[siLc]

If a trailer-related fuse was blown, you replaced it, cleared the fault in module 69 and the fault didn't come back - then you should be good. I wouldn't worry about the voltage thing unless after connecting a trailer, the fuse blows again. You can check with a trailer simulator.

 

[alike]

If a trailer-related fuse was blown, you replaced it, cleared the fault in module 69 and the fault didn't come back - then you should be good. I wouldn't worry about the voltage thing unless after connecting a trailer, the fuse blows again. You can check with a trailer simulator.

I guess i have to check with a real trailer to be sure. If im not lucky and there is something wrong when the mechanic tests it again, it will cost me some more money to go back to the EU control workshop once again.

Simulator? Is this something cheap i can buy? Sounds expensive.

 

[PetrolDave]

This is the sort of thing you need https://www.amazon.co.uk/Towing-Lights-Circuit-Trailer-Caravan/dp/B00HRLJM2C

 

[Polofan]

https://www.harald-nyborg.dk/produk...VgY2yCh18mQsGEAQYASABEgI6CvD_BwE&gclsrc=aw.ds

Like this

 

[alike]

Thank you all for suggestions.

I tried a trailer today, and this is what happened: There were lights that normally lit up when you connect a trailer. Like sign lights and the red ones that usually lit up when car is started with trailer attached. However, no brake or turning lights worked. I dont know if the fault is with the trailer or the car connection. Also i used a 13p to 7p adapter, and im not sure if its something wrong with that one. I just ordered one of those simulators to be sure.

 

[alike]

I got the simulator and tried it.

All the lights on the simulator shows on without using/testing them, seams like the 1.75volts on all measurements on lights that are not enabled show there is something wrong with the trailer unit or something. When i actually use the lights, ie the brake lights, they do work. However the other lights are sometimes on, or showing yellom instead of green. To be honest i dont quite understand this simulator... i couldnt find any manual on it either.

Not sure what to do next but im considering changing the trailer unit. Then another question comes to mind. What kind of trailer units can i use with this wiring and connection? My model is 1k0 907 383 e. One black and one red connector to it.

Edit: Is for example this model the same as the one i have? Looks exact same. There are several models that look exactly same, but have different ending, instead of E it is either B, D, or F. Is this the revision of the hardware? And can i use backwards, forwards?

 

[Polofan]

Why not try that .

I guess i have to check with a real trailer to be sure. If im not lucky and there is something wrong when the mechanic tests it again, it will cost me some more money to go back to the EU control workshop once again.

 

[alike]

Ive have bought a used module with same hardware version, but different software version. I measure the same fault with that attached as the former one. But do i need to program the trailer module somehow?

I have measured again with volts... i get 1.63V between earth pin 13 on trailer and pin 5, 7, 4, 1. This is weird!
12Volts between pin 13 and 9.
350 ohms between earth pin 13 and 12 volt pin 9.

Why am i measuring 1.63V between earth and several of the plugs on the trailer when they are not in use? I am stuck and need help with the diagnose.

Edit: I read somewhere that there can be a bulb failure test builtin and sometimes its 2V, 3V and similar. Is this what i have been experiencing?

 

[Uwe]

Why am i measuring 1.63V between earth and several of the plugs on the trailer when they are not in use? I am stuck and need help with the diagnose.

Edit: I read somewhere that there can be a bulb failure test builtin and sometimes its 2V, 3V and similar. Is this what i have been experiencing?

That would be my guess; the module is supplying a low voltage (maybe even a PWM signal with low duty cycle) to see if there's a bulb on that circuit. What happens of you apply a load?

-Uwe-

 

[alike]

Sorry that i forgot to reply here. I changed the module with an used one from ebay and now it works. Same version and sw. No programming needed apparently. Its the same module as i got weird voltages from, but it was nothing wrong with it when tested at workshop.