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Locking Diffs Errors Error on both Locking Differentials Rate Topic: -----

#1 User is offline   GreenTreg 

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Posted 05 September 2020 - 09:44 PM

Hi all

First proper question here and I hope someone can point me in the right direction.
Bought this T3 Escape about a month ago. Already fitted rear camera, mid fitting TPMS (just waiting for new clips for the transmitters).
I have proper Vag-com and ElsaWin.
Being an Escape it has the 4XMOTION system with low range, locking centre diff and locking rear diff.

I can't find much (like almost nothing) on the below errors which keep coming back after Clear DTCs. They come back even if I don't engage the differentials. Below I also include the full first scan when we first got the car in case there are any other clues I missed.

Any guidance on the below would be very helpful please. I am suspecting that it is not really a problem with both differentials, but probably is a problem with the control module. But what can I do as next steps? Anything other than replace the module?


Address 32: Differential Locks        Labels: None
   Part No SW: 0BN 927 771     HW: 0BN 927 771 
   Component: Quersperre          5220  
   Revision: H04         Serial number: 112108253604  
   Shop #: WSC 00000 000 00000
   VCID: 0109BF9E5896408E04-8054

3 Faults Found:
02062 - Differential Lock 
            003 - Mechanical Failure - Intermittent
02412 - Differential Lock Rear 
            003 - Mechanical Failure - Intermittent
16353 - Control Module - Internal Malfunction 
            014 - Defective - Intermittent


Here is the full first scan when I got the car before doing any clear. The other errors have not returned.

Saturday,25,July,2020,11:11:18:40778
VCDS -- Windows Based VAG/VAS Emulator Running on Windows 10 x64
VCDS Version: 20.4.1.0 (x64)
Data version: 20200331 DS317.0
www.Ross-Tech.com


VIN: WVGZZZ7PZBD042XXX   License Plate: XXXXXXX
Mileage: 118047km-73351mi   Repair Order: firstcheck



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


Chassis Type: 7P-VW52 (7P6)
Scan: 01 02 03 05 08 09 10 15 16 17 19 22 32 34 42 46 52 53 56 5F
          62 69 72

VIN: WVGZZZ7PZBD042XXX   Mileage: 118047km-73351miles

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
15-Airbags -- Status: OK 0000
16-Steering wheel -- Status: OK 0000
17-Instruments -- Status: OK 0000
19-CAN Gateway -- Status: Malfunction 0010
22-AWD -- Status: OK 0000
32-Differential Locks -- Status: Malfunction 0010
34-Level Control -- Status: Malfunction 0010
42-Door Elect, Driver -- Status: OK 0000
46-Central Conv. -- Status: OK 0000
52-Door Elect, Pass. -- Status: OK 0000
53-Parking Brake -- Status: OK 0000
56-Radio -- Status: OK 0000
5F-Information Electr. -- Status: OK 0000
62-Door, Rear Left -- Status: OK 0000
69-Trailer -- Status: OK 0000
72-Door, Rear Right -- Status: OK 0000
 
-------------------------------------------------------------------------------
Address 01: Engine (J623-CASA)       Labels:. 059-907-401-V2.clb
   Part No SW: 7P0 907 401     HW: 7P0 907 401 
   Component: 3.0TDI EDC17  H17 0009  
   Revision: 51H17---    
   Coding: 296A4012233E01020000
   Shop #: WSC 59816 001 1048576
   ASAM Dataset: EV_ECM30TDI0117P0907401 002011
   ROD: EV_ECM30TDI0117P0907401.rod
   VCID: 6CD7FE2A8714BDE6C7-8038

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

-------------------------------------------------------------------------------
Address 02: Auto Trans (J217)       Labels:| 0C8-927-750.clb
   Part No SW: 0C8 927 750 H    HW: 0C8 927 750 H
   Component: AL1000 AISIN  001 1885  
   Serial number:               
   Coding: 001568
   Shop #: WSC 11351 004 1048576
   ASAM Dataset: EV_TCMAL991031 001001
   ROD: EV_TCMAL991031_001_VW52.rod
   VCID: 31692F5E60B6100EB4-8064

No fault code found.

-------------------------------------------------------------------------------
Address 03: ABS Brakes (J104)       Labels:* 7P0-907-379.clb
   Part No SW: 7P0 907 379 K    HW: 7P0 907 379 A
   Component: MK25A         H36 0418  
   Revision: --------    Serial number: 408810010EC010
   Coding: 4B6B13C30B282555D2F9C897D0D5A4507700
   Shop #: WSC 31414 790 00001
   ASAM Dataset: EV_MK25AXT 007001
   ROD: EV_ESPMK25A00700.rod
   VCID: 45816B8EC43EACAE78-8010

No fault code found.

-------------------------------------------------------------------------------
Address 05: Acc/Start Auth. (J393)       Labels:. 8K0-907-064-05.clb
   Part No SW: 4H0 907 064 AL    HW: 4H0 907 064 AL
   Component: BCM2 2.0      H24 0217  
   Revision: 00002001    
   Coding: 01B60000000000000000
   Shop #: WSC 31414 790 00001
   VCID: 73E5E556D22A621E06-8026

   Subsystem 1 - Part No SW: 7P6 959 754 AA    HW: 7P6 959 754 AA
   Component: FBSTOUAREGIDG  H05 0051 
   Serial number: 0511000006863003    

   Subsystem 2 - Part No SW: 4H0 905 852 B    HW: 4H0 905 852 B
   Component: J764 ELV MLB  H38 0044 
   Serial number: 2311000064792009    

No fault code found.

-------------------------------------------------------------------------------
Address 08: Auto HVAC (J255)       Labels:| 7P6-907-040.clb
   Part No SW: 7P6 907 040 AG    HW: 7P6 907 040 AG
   Component: Klima 2 Zonen H18 0613  
   Coding: B626000890
   Shop #: WSC 31414 790 00001
   ASAM Dataset: EV_AirCondiFront 004001
   ROD: EV_AirCondiFront_VW52.rod
   VCID: 79F9D77EF846184E4C-802C

No fault code found.

-------------------------------------------------------------------------------
Address 09: Cent. Elect. (J519)       Labels:. 4H0-907-063-V1.clb
   Part No SW: 4H0 907 063 L    HW: 4H0 907 063 D
   Component: BCM1 2.0      H12 0092  
   Revision: 15012002    Serial number: 00000000983783
   Coding: 6900001181345D010005000300005F5F431D670807000241000000000000
   Shop #: WSC 31414 790 00001
   VCID: 31692F5E68B6100EB4-8064

   Subsystem 1 - Part No SW: 7P0 955 120     HW: 7P0 955 120 
   Component: WWS    110322  31  0020 
   Serial number: 90243401110330185104
   Coding: 004DBD

   Subsystem 2 - Part No SW: 7P0 955 559 D    HW: 7P0 955 559 D  Labels: 8K0-955-559.CLB
   Component: RLFS  H09 0011 
   Serial number: 10146184            
   Coding: 035223

   Subsystem 3 - Part No SW: 7P6 941 431 B    HW: 7P6 941 431 B
   Component: E1 - LDS  H04 0031 
   Serial number: 00000000001003110167

No fault code found.

-------------------------------------------------------------------------------
Address 10: Park/Steer Assist (J446)       Labels:| 7P6-919-475.clb
   Part No SW: 7P6 919 475     HW: 7P6 919 475 
   Component: PARKHILFE 8K  H03 0016  
   Revision: --------    Serial number: 55901105901039
   Coding: 118501
   Shop #: WSC 31414 790 00001
   ASAM Dataset: EV_VW526ParkiAssis2 001008
   ROD: EV_VW526ParkiAssis2.rod
   VCID: 55A1BBCE349E1C2E08-8000

No fault code found.

-------------------------------------------------------------------------------
Address 15: Airbags (J234)       Labels:| 7P0-959-655.clb
   Part No SW: 7P0 959 655 B    HW: 7P0 959 655 B
   Component: VW10Airbag00K H05 0023  
   Revision: --------    Serial number: 003JX0023TJM
   Coding: 00000000000000000000000000000000304B
   Shop #: WSC 31414 790 00001
   ASAM Dataset: EV_AirbaVW10BPAVW526 001001
   ROD: EV_AirbaVW10BPAVW526_001.rod
   VCID: 408F7A9ADB1C89864B-8014

   Crash sensor for side airbag: driver side: 
   Serial number: 3575LRB405D0CE32297L

   Crash sensor for side airbag: front passenger side: 
   Serial number: 3585LRB405V0DGESAOMW

   Crash sensor for side airbag: rear: driver side: 
   Serial number: 3515RRB405D0H4DU4P7T

   Crash sensor for side airbag: rear: passenger side: 
   Serial number: 3525RRB40650H1GGMP9T

   Crash sensor for front airbag: driver side: 
   Serial number: 3555NRB405T0G2HUC0BX

   Crash sensor for front airbag: front passenger side: 
   Serial number: 3565NRB405T0G2HU59B-

No fault code found.

-------------------------------------------------------------------------------
Address 16: Steering wheel (J527)       Labels:. 4H0-953-568.clb
   Part No SW: 4H0 953 568 A    HW: 7P6 953 507 
   Component: Lenks.Modul   H08 0007  
   Revision: --------    Serial number: 90815KCL00014 
   Coding: 000015
   Shop #: WSC 31414 790 00001
   VCID: 31692F5E68B6100EB4-8064

   Subsystem 1 - Part No SW: 7P6 959 542     HW: 7P6 959 542 
   Component: E221__MFL-TAS  H03 0027 
   Serial number: 0001087             

No fault code found.

-------------------------------------------------------------------------------
Address 17: Instruments (J285)       Labels:| 7P6-920-xxx-17.clb-SRI1
   Part No SW: 7P6 920 981     HW: 7P6 920 981 
   Component: Kombi         H13 0239  
   Revision: 11240062    Serial number: 658220211593040
   Coding: 33273300B2002600010004
   Shop #: WSC 31414 790 00001
   ASAM Dataset: EV_KombiUDSRBVW526 001013
   ROD: EV_KombiUDSRBVW526.rod
   VCID: 7AFBC872FD40135645-802E

No fault code found.

-------------------------------------------------------------------------------
Address 19: CAN Gateway (J533)       Labels:* None
   Part No SW: 7P6 907 530 C    HW: 7P6 907 530 A
   Component: GW-CAN-L-MOST H08 5202  
   Revision: --------    Serial number: 00000000118263
   Coding: 000D077500
   Shop #: WSC 31414 790 00001
   ASAM Dataset: EV_GatewVW526UDS 001006
   ROD: EV_GatewUDS_VW52.rod
   VCID: 387F127A83CCC146F3-806C

   Battery Monitoring Control Module: 
   Subsystem 1 - Part No SW: 7P0 915 181 A    HW: 7P0 915 181 
   Component: Batt_Sensor  H07 0140 
   Serial number: 00000000005653000589

   Voltage stabilizer: 
   Subsystem 2 - Part No SW: 7PP 959 663 E    HW: 7PP 959 663 E
   Component: J532_DCDCStab  H17 0042 
   Serial number: 11069001648011200181

1 Fault Found:
12291 - Energy Management Active 
          U140B 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: 7
                    Fault Frequency: 5
                    Reset counter: 15
                    Mileage: 117793 km
                    Date: 2020.06.27
                    Time: 10:39:38

                    Voltage terminal 30: 12.4 V
                    Voltage terminal 15: 0.0 V
                    Control Module temperature: 19 ∞C
                    System status: Awake_Timer_active
                    IN ESP_standstill flag: no standstill detected
                    Engine running: OFF
                    IN ZAS_Te_X: OFF
                    Terminal 15 status via CAN: OFF
                    Terminal 15 status: OFF
                    Datenfeld: 1


-------------------------------------------------------------------------------
Address 22: AWD        Labels: None
   Part No SW: 0BV 927 755 A    HW: 0BV 927 755 A
   Component: TRANSFERCASE        0217  
   Shop #: WSC 00000 000 00000
   VCID: 4C975EAA2F545DE6A7-8018

No fault code found.

-------------------------------------------------------------------------------
Address 32: Differential Locks        Labels: None
   Part No SW: 0BN 927 771     HW: 0BN 927 771 
   Component: Quersperre          5220  
   Revision: H04         Serial number: 112108253604  
   Shop #: WSC 00000 000 00000
   VCID: 0109BF9E5896408E04-8054

3 Faults Found:
02062 - Differential Lock 
            003 - Mechanical Failure - Intermittent
02412 - Differential Lock Rear 
            003 - Mechanical Failure - Intermittent
16353 - Control Module - Internal Malfunction 
            014 - Defective - Intermittent

-------------------------------------------------------------------------------
Address 34: Level Control (J197)       Labels:. 7P0-907-553.clb
   Part No SW: 7P0 907 553 K    HW: 7P0 907 553 K
   Component: PASM          H01 1110  
   Revision: 00000000    Serial number: 00000110130690
   Coding: 14210000
   Shop #: WSC 00606 210 88440
   ASAM Dataset: EV_PASMConti 001004
   ROD: EV_PASMConti.rod
   VCID: 3F8D7966A6E2F67E32-806A

1 Fault Found:
0786 - Electical Consumer Cut-Off Active 
          U1402 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: 13
                    Fault Frequency: 16
                    Reset counter: 1
                    Mileage: 794880 km
                    Date: 2109.10.20
                    Time: 18:24:61

                    Default: 00
                    Default: 79
                    Default: 00


-------------------------------------------------------------------------------
Address 42: Door Elect, Driver (J386)       Labels:. 4H0-959-793.clb
   Part No SW: 4H0 959 793 F    HW: 4H0 959 793 F
   Component: TSG FA        H07 0162  
   Revision: --------    Serial number: 0000114291138 
   Coding: 011D0620D001451005080002
   Shop #: WSC 31414 790 00001
   VCID: 3C770E6ABFF4ED6617-8068

No fault code found.

-------------------------------------------------------------------------------
Address 46: Central Conv. (J393)       Labels:. 4H0-907-064-46.clb
   Part No SW: 4H0 907 064 AL    HW: 4H0 907 064 AL
   Component: BCM2 2.0      H24 0217  
   Revision: 00002001    Serial number: 0145501779    
   Coding: 019B162228B9009483200624200000000000000000000000000000000000
   Shop #: WSC 31414 790 00001
   VCID: 73E5E556D22A621E06-8026

   Subsystem 1 - Part No: 7P6 951 171 
   Component: DWA-Sensor  002 0204 

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

   Subsystem 3 - Part No SW: 7P0 959 591     HW: 7P0 959 591 
   Component: J245 PS30.050  H07 0006 
   Serial number:     WOO11612870     
   Coding: 191100

   Subsystem 4 - Part No SW: 7P0 959 591 A    HW: 4H0 959 591 
   Component: J394 PS30.050  H07 0006 
   Serial number:     WOO11630791     
   Coding: 191100

No fault code found.

-------------------------------------------------------------------------------
Address 52: Door Elect, Pass. (J387)       Labels:. 4H0-959-792.clb
   Part No SW: 4H0 959 792 F    HW: 4H0 959 792 F
   Component: TSG BF        H07 0162  
   Revision: --------    Serial number: 0000114272719 
   Coding: 011D0620D001451005080000
   Shop #: WSC 31414 790 00001
   VCID: 3B750D76BAFAEA5E1E-806E

No fault code found.

-------------------------------------------------------------------------------
Address 53: Parking Brake (J540-)       Labels:| 7P0-907-801.clb
   Part No SW: 7P0 907 801 D    HW: 7P0 907 801 D
   Component: EPB           H51 1000  
   Revision: 00000000    Serial number: A11308001C7   
   Coding: 01040000
   Shop #: WSC 31414 790 00001
   ASAM Dataset: EV_ParkbA7 000006
   ROD: EV_ParkbA7.rod
   VCID: 3467264A9FA42526DF-8060

   Slave 3: 

No fault code found.

-------------------------------------------------------------------------------
Address 56: Radio (R)       Labels: Redir Fail!
   Part No SW: 4G0 035 061 A    HW: 4G0 035 061 
   Component: Radio U DAB   H52 0065  
   Revision: AB001007    Serial number: 109CU0B7514067
   Coding: 010105020100000001
   Shop #: WSC 31414 790 00001
   VCID: 1B35EDF61A3A8A5EFE-804E

No fault code found.

-------------------------------------------------------------------------------
Address 5F: Information Electr. (J794)       Labels:. 4E0-035-6xx-5F.clb
   Part No SW: 7P6 035 670 B    HW: 7P6 035 670 B
   Component: H-BNT-EU      H44 0203  
   Revision: --------    Serial number: 478C00B7539551
   Coding: 010101050040C1ED01002B0E00000003F0040100
   Shop #: WSC 31414 790 00001
   VCID: 3467264A97A42526DF-8060

   Subsystem 1 - Part No: 8R0 060 884 N
   Component: EUR 2011  1205 

   Subsystem 2 - Part No SW: 7P6 919 603     HW: 7P6 919 603 
   Component: DU8 SV Touch  H24 0045 
   Serial number: VWZ8Z9L2800WNN      

   Subsystem 3 - Part No SW: 7P6 919 603     HW: 7P6 919 603 
   Component: DU8 SV Touch  H24 0045 
   Serial number: VWZ8Z9L2800WNN      

   Subsystem 4 - Part No: 8R0 060 961 
   Component: CD-Database  1886 

No fault code found.

-------------------------------------------------------------------------------
Address 62: Door, Rear Left (J388)       Labels:. 4H0-959-795.clb
   Part No SW: 4H0 959 795 B    HW: 4H0 959 795 B
   Component: TSG HL        H09 0162  
   Revision: --------    Serial number: 0000114572062 
   Coding: 011C06200001251005080000
   Shop #: WSC 31414 790 00001
   VCID: 3A7B0872B5C0D35605-806E

No fault code found.

-------------------------------------------------------------------------------
Address 69: Trailer (J345)       Labels: Redir Fail!
   Part No SW: 7P0 907 383 G    HW: 7P0 907 383 C
   Component: Anhaenger     H09 0110  
   Revision: 5H001001    Serial number: 00000145858187
   Coding: 0106040000000000
   Shop #: WSC 31414 790 00001
   VCID: 3C770E6ABFF4ED6617-8068

No fault code found.

-------------------------------------------------------------------------------
Address 72: Door, Rear Right (J389)       Labels:. 4H0-959-795.clb
   Part No SW: 4H0 959 795 B    HW: 4H0 959 795 B
   Component: TSG HR        H09 0162  
   Revision: --------    Serial number: 0000114570625 
   Coding: 011C06200001251005080000
   Shop #: WSC 31414 790 00001
   VCID: 3A7B0872B5C0D35605-806E

No fault code found.

End-------------------------(Elapsed Time: 06:20)--------------------------


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#2 User is offline   chaser 

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Posted 06 September 2020 - 03:19 PM

Current flow diagrams and multimeter would be my approach. Check circuits related to the j647 and check the motor on the rear diff. Pay particular attention to all power and earths/groundsOnly if everything tests out okay would I try a replacement module.
Chaser...

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

Current... Touareg R-Line Plus 3.0 V6 TDI 262PS 8-Speed Auto Tiptronic (from new). Area View, Canyon Grey Metallic, 21" Mallory Alloys, Dynamic CDC Air Suspension, Piano black decorative inlays with retrofit black surrounds on dashboard. 4way Electric R-Line Branded Two Tone Sports Seats in Nappa Leather, Memory Pack, Factory Tow Pack, Ambient Light Pack etc, etc,

Previous... Pure White 2014 Touareg V6
R-Line 3.0Tdi 245ps 8-speed Auto Tiptronic (from new). Factory swivelling tow pack. Fully wired 13pin electrics. 9x20" Pikes Peak alloys. Piano black decorative inlays. Interior ambient light pack. Reversing camera.

Before that... Salt Lake Grey 2006 Touareg 2.5 Tdi SE Sport Auto (from 26k miles)


#3 User is offline   GreenTreg 

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Posted 06 September 2020 - 05:20 PM

Thanks Chaser. Will take a look during the week.

#4 User is offline   GreenTreg 

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Posted 07 September 2020 - 12:01 PM

Hi Chaser (or anyone else really)

I've identified all the relevant pages in the electrical circuits. In this case - 2/14, 14/5(this is the main one), 17/5, 71/14.

With a small multimeter and access to the Control module, I can only really get to one end of almost all the wires without taking the car apart, and with only access to one end of a cable, there isn't a lot you can do other than check you have 12V or earth at the relevant terminals. I can probably check for continuity between J647 and V304 on the 4 relevant cables, but beyond that out of 47 terminals I'm struggling to see what I can check. Which ones should be 12V other than 17, 41, 46?, which ones should be 0V other than 32, 47? Especially since Vag-Com says they are all Intermittent faults. Is there somewhere which would explain what I can/ should do? Maybe a link to something useful on YouTube? Plenty of videos out there, but can't find one which explains in a strightforward way, what I can do.

Alternatively is it possible to record the various data connections with Vag-com? Again I heard it is possible, but not seen something easy to explain it.

Thanks again.

#5 User is offline   chaser 

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Posted 08 September 2020 - 09:58 AM

Yes electrical testing can  require a rediculous amount of trim removal.

I attach a length of wire to one of the multimeter probes to reach anywhere in the car for checking continuity.
14/6 Check every pin you can for continuity between the stepper motor and module, not just the 4. Without sensor signals the system will malfunction.
Consider removing the motor. Will it operate when detached from the differential?
You could also test on the bench with a +12v to the V304 connections.
That's about it without being there and thinking as I go.
Chaser...

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

Current... Touareg R-Line Plus 3.0 V6 TDI 262PS 8-Speed Auto Tiptronic (from new). Area View, Canyon Grey Metallic, 21" Mallory Alloys, Dynamic CDC Air Suspension, Piano black decorative inlays with retrofit black surrounds on dashboard. 4way Electric R-Line Branded Two Tone Sports Seats in Nappa Leather, Memory Pack, Factory Tow Pack, Ambient Light Pack etc, etc,

Previous... Pure White 2014 Touareg V6
R-Line 3.0Tdi 245ps 8-speed Auto Tiptronic (from new). Factory swivelling tow pack. Fully wired 13pin electrics. 9x20" Pikes Peak alloys. Piano black decorative inlays. Interior ambient light pack. Reversing camera.

Before that... Salt Lake Grey 2006 Touareg 2.5 Tdi SE Sport Auto (from 26k miles)


#6 User is offline   Klewy 

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Posted 08 September 2020 - 03:09 PM

On aircraft we used to use the airframe to test the continuity of long cables. Check open circuit between the wir(s) to test and the chassis then connect the other end of the wire(s) be tested to a chassis point with Fly leads and all can be tested from the one connector
2015 R-Line 262PS in White

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#7 User is offline   chaser 

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Posted 08 September 2020 - 04:44 PM

Clever idea! 🙂
Chaser...

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

Current... Touareg R-Line Plus 3.0 V6 TDI 262PS 8-Speed Auto Tiptronic (from new). Area View, Canyon Grey Metallic, 21" Mallory Alloys, Dynamic CDC Air Suspension, Piano black decorative inlays with retrofit black surrounds on dashboard. 4way Electric R-Line Branded Two Tone Sports Seats in Nappa Leather, Memory Pack, Factory Tow Pack, Ambient Light Pack etc, etc,

Previous... Pure White 2014 Touareg V6
R-Line 3.0Tdi 245ps 8-speed Auto Tiptronic (from new). Factory swivelling tow pack. Fully wired 13pin electrics. 9x20" Pikes Peak alloys. Piano black decorative inlays. Interior ambient light pack. Reversing camera.

Before that... Salt Lake Grey 2006 Touareg 2.5 Tdi SE Sport Auto (from 26k miles)


#8 User is offline   Klewy 

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Posted 08 September 2020 - 08:35 PM

Easier than getting out the Time Delay Reflectometer (TDR) that was the ‘official method’
2015 R-Line 262PS in White

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#9 User is offline   GreenTreg 

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Posted 15 September 2020 - 07:26 PM

I managed to find some time to do some testing.

Attached File  Touareg_14_6.jpeg (851.03K)
Number of downloads: 4

I tested all the 12 wires between J647 and the diff lock unit. All have continuity.
I tested the 3 wires from fuse box C to J647. All have continuity. All 3 fuses OK. SC3 and SC4 are permanent live. OK. SC43 is not permanent live. I did not check if it went live with ignition on but fuse is OK.


So then I had a think about what else I could test. I reconnected the 2 plugs on the diff lock unit, but left the plug on J647 disconnected. I then tested between terminals 44 to 29 and 44 to 43 for continuity via the 2 temperature senders, but neither of them have continuity. Since they are only temperature senders I was expecting continuity. Would they really need the diff lock unit to be energised before being able to measure a resistance? Could the 2 errors on the diff lock relate to the 2 temperature senders?

I've no idea how to test the can bus wires. I need some lessons for that I think.

So any ideas on next steps please? Remove the diff lock assembly and then test on the bench? But what to test there? Or something else? Thanks.

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