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Thread: 2011 Golf TDI Auxiliary heater won't start when it should

  1. #1
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    2011 Golf TDI Auxiliary heater won't start when it should

    Hello everyone,

    I drive 2011 Golf 2.0 TDI (CFHC), which have auxiliary heater (z35) installed as standard. The problem is it won't turn on naturally, never. I can get it work only by using bidirectional control (output test) for low and high heat output relays. Just to be sure, I checked the heater element, wiring integrity, no fault codes - everything is fine, except ECU won't commanding it on when it should.

    According to ELSA, Z35 test condition are:
    Intake air temperature less than 16C
    Coolant temperature less than 80C
    Passenger compartment temperature about 20C
    Battery voltage greater than 11V
    Alternator load not greater than 50%
    Engine speed greater than 450 RPM.
    Turn rotary knob for interior temperature to end position for maximum temperature.

    And I'm sure that every single condition in that list is met, all the sensors are working fine.

    I made an observation and took some measuring values samples from my and known good car, with exactly the same aux. heater system:


    As you can see, in my car there is a "1" at he begging of the row in "Electric auxiliary heater: shut-off conditions Bit-0" parameter, which prevents auxiliary heater from turning on, despite that every single condition is met. I'm out of ideas how to solve this. What is the condition, which cause that "1" to appear?

    The design of this system is super simple: two relays turning that heater element on and off. When necessary conditions are met, ECU provides ground to high or low heat relay control side and turns heater element on.

    You can also find wiring diagrams below:
    https://i.imgur.com/zNlmFOU.png
    https://i.imgur.com/x3FbxAM.png

    Autoscan:
    Code:
    Wednesday,28,November,2018,20:21:01:34902
    VCDS -- Windows Based VAG/VAS Emulator Running on Windows 7 x64
    VCDS Version: 18.9.0.1 (x64)  HEX-NET CB: 0.4436.4
    Data version: 20180927 DS296.0
    www.Ross-Tech.com
    
    
    VIN: WVWZZZ1KZBM653841   License Plate: GOLF6
    Mileage: 235660km-146432mi   Repair Order: 
    
    
    
    --------------------------------------------------------------------------------
    --------------------------------------------------------------------------------
    
    
    Chassis Type: 1K-VW36 (7N0)
    Scan: 01 03 08 09 10 15 16 17 19 25 2E 37 42 44 46 52 56 62 72 77
             
    
    VIN: WVWZZZ1KZBM653841   Mileage: 235660km-146432miles
    
    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: 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: OK 0000
    25-Immobilizer -- Status: OK 0000
    2E-Media Player 3 -- Status: OK 0000
    37-Navigation -- 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
    62-Door, Rear Left -- Status: OK 0000
    72-Door, Rear Right -- Status: OK 0000
    77-Telephone -- Status: OK 0000
    -------------------------------------------------------------------------------
    Address 01: Engine (J623-CFHC)       Labels:. 03L-906-018-CFF.clb
       Part No SW: 03L 906 018 AN    HW: 03L 907 309 R
       Component: R4 2,0L EDC   H22 9015  
       Revision: 42H22---    Serial number: 00000000000000
       Coding: 00190012042400080000
       Shop #: WSC 78387 152 12345
       ASAM Dataset: EV_ECM20TDI01103L906018AN 003008
       ROD: EV_ECM20TDI01103L906018AM_003_VW36.rod
       VCID: F6A09F40494FEBFA7C-80A2
    
    No fault code found.
    Readiness: 0 0 0 0 0 
    
    -------------------------------------------------------------------------------
    Address 03: ABS Brakes (J104)       Labels:. User\1K0-907-379-60EC1F.lbl
       Part No SW: 1K0 907 379 BE    HW: 1K0 907 379 BE
       Component: ESP MK60EC1   H31 0108  
       Revision: 00H31001    
       Coding: 143B600D092700FD281306E8901A0042350000
       Shop #: WSC 00066 123 12345
       VCID: F6A09F40414FEBFA7C-80A2
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 08: Auto HVAC (J255)       Labels:| 5K0-907-044.clb
       Part No SW: 5K0 907 044 DT    HW: 5K0 907 044 DT
       Component: Climatronic   H17 1010  
       Revision: 00003001    
       Coding: 0000000002
       Shop #: WSC 00066 000 00149
       ASAM Dataset: EV_Climatronic A01010
       ROD: EV_ClimaAutoBasis_VW36.rod
       VCID: 804CF9981B8BD54A56-80D4
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 09: Cent. Elect. (J519)       Labels:. 1K0-937-08x-09.clb
       Part No SW: 5K0 937 086 J    HW: 5K0 937 086 J
       Component: BCM PQ35 M    011 0045  
       Revision: BC011001    
       Coding: 00180E3A882D02C040080080340081E447790088537D8140648000200040
       Shop #: WSC 00066 123 12345
       VCID: BB364E743AED769243-80EE
    
       Subsystem 1 - Part No: 5K1 955 119   Labels: 1KX-955-119.CLB
       Component: Wischer 23111  26  0512 
       Coding: 009795
    
       Subsystem 2 - Part No: 1K0 955 559 AH  Labels: 1K0-955-559-AG.CLB
       Component: RLS 081010 05  54  0403 
       Coding: 03302D
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 10: Park/Steer Assist (J446)       Labels:. 3C8-919-475.clb
       Part No SW: 1K9 919 475 A    HW: 5K0 919 475 E
       Component: PARKHILFE 8K  H01 0004  
       Revision: --------    Serial number: 12591032319252
       Coding: 108003
       Shop #: WSC 00066 000 00000
       VCID: B93A547C30D1448251-80EC
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 15: Airbags (J234)       Labels:| 5K0-959-655.clb
       Part No SW: 5C0 959 655 C    HW: 5C0 959 655 C
       Component: AirbagVW10    012 0612  
       Serial number: 003G6D0395NZ  
       Coding: 00003536
       Shop #: WSC 00066 000 00000
       ASAM Dataset: EV_AirbaVW10SMEVW360 A01014
       ROD: EV_AirbaVW10SMEVW360.rod
       VCID: B2286350E5A7B7DA90-80E6
    
       Crash sensor for side airbag: driver side: 
       Subsystem 1 - Part No SW: 1KM 955 557     HW: 1KM 955 557 
       Component: S.Sens.Fahr.V  H01 ---- 
       Serial number: 3572MSME75604558ZZZX
    
       Crash sensor for side airbag: front passenger side: 
       Subsystem 2 - Part No SW: 1KM 955 557     HW: 1KM 955 557 
       Component: S.Sens.Beif.V  H01 ---- 
       Serial number: 3582MSME1A460258ZZZU
    
       Crash sensor for side airbag: rear: driver side: 
       Component: S.Sens.Fahr.H  --- ---- 
       Serial number: 3511HSME194B6324ZZZL
    
       Crash sensor for side airbag: rear: passenger side: 
       Component: S.Sens.Beif.H  --- ---- 
       Serial number: 3521HSME3C423C24ZZZO
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 16: Steering wheel (J527)       Labels:| 5K0-953-569.clb
       Part No SW: 5K0 953 507 BC    HW: 5K0 953 549 E
       Component: Lenks.Modul   007 0080  
       Revision: --------    Serial number:  90422JJJ000C4
       Coding: 1082140000
       Shop #: WSC 00066 000 00158
       ASAM Dataset: EV_SMLSNGKUDS A05001
       ROD: EV_SMLSNGKUDS_A05.rod
       VCID: F2A8A3502527F7DA50-80A6
    
       Multifunction steering wheel control module: 
       Subsystem 1 - Part No SW: 5K0 959 542 A    HW: 5K0 959 542 A  Labels: 3C8-959-537.CLB
       Component: E221__MFL-TAS  H07 0013 
       Serial number: 0132234             
       Coding: 820000
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 17: Instruments (J285)       Labels:| 5K0-920-xxx-17.clb-SRI1
       Part No SW: 5K0 920 871 AX    HW: 5K0 920 871 AX
       Component: KOMBI         H20 0420  
       Serial number: 00000000000000
       Coding: 171B01
       Shop #: WSC 06494 995 29333
       ASAM Dataset: EV_Kombi_UDS_VDD_RM09 A04089
       ROD: EV_Kombi_UDS_VDD_RM09_004_VW32.rod
       VCID: 8444F5880F93C96A72-80D0
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 19: CAN Gateway (J533)       Labels:. User\7N0-907-530-V2.lbl
       Part No SW: 7N0 907 530 C    HW: 1K0 907 951 
       Component: J533  Gateway H37 0614  
       Revision:   H37       Serial number: 18111001210777
       Coding: 352002
       Shop #: WSC 00066 123 12345
       VCID: B02C6958E3AB85CAE6-80E4
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 25: Immobilizer (J334)       Labels:| 5K0-920-xxx-25.clb
       Part No SW: 5K0 953 234     HW: 5K0 953 234 
       Component: IMMO          H20 0420  
       Serial number: 00000000000000
       Coding: 000000
       Shop #: WSC 00000 000 00000
       ASAM Dataset: EV_Immo_UDS_VDD_RM09 A03008
       ROD: EV_Immo_UDS_VDD_RM09.rod
       VCID: EA98BB300DF73F1AE8-80BE
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 2E: Media Player 3 (J650)       Labels:. 5N0-035-342.lbl
       Part No SW: 5N0 035 342 C    HW: 5N0 035 342 C
       Component: SG EXT.PLAYER H13 0111  
       Revision: A1001003    Serial number: 7668721145    
       Coding: 020000
       Shop #: WSC 00066 000 00000
       VCID: A71E8204D665C27237-80F2
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 37: Navigation (J794)       Labels:| 3C0-035-270.clb
       Part No SW: 3C0 035 270 B    HW: 3C0 035 270 
       Component: RNS310        H18 0357  
       Revision: 10000000    Serial number: VWZ1Z2K6328197
       Coding: 040004010400000000000000
       Shop #: WSC 01383 790 50316
       ASAM Dataset: VW_RNS310 A02005
       ROD: EV_VWRNS310UDS.rod
       VCID: 997AB4FC98116482B1-80CC
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 42: Door Elect, Driver (J386)       Labels:| 3C0-959-70X-GEN4.clb
       Part No SW: 3C0 959 701 C    HW: 3C0 959 793 A
       Component: TUER-SG FT    002 0307  
       Revision: 12101005    Serial number: 0001703062
       Coding: 0010B6
       Shop #: WSC 01383 790 50316
       ASAM Dataset: EV_DCU42BroseDriveSide A03004
       ROD: EV_DCU42BroseDriveSide_VW36.rod
       VCID: A81C8138D37BCD0A3E-80FC
    
       Slave Driver: 
       Subsystem 1 - Part No SW: 1K0 959 703 AG    HW: 1K0 959 795 R  Labels: 1K0-959-70X-GEN4.CLB
       Component: J388__TSG-HL  006 1401 
       Serial number: 00000005397568      
       Coding: 000090
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 44: Steering Assist        Labels: 1K0-909-14x-GEN3.clb
       Part No: 1K0 909 144 J
       Component: EPS_ZFLS Kl. 70     3001  
       Revision: 00H17000    
       Shop #: WSC 02069 000 90108
       VCID: B12A6C5C28A18CC2E9-80E4
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 52: Door Elect, Pass. (J387)       Labels:| 3C0-959-70X-GEN4.clb
       Part No SW: 3C0 959 702 C    HW: 3C0 959 792 A
       Component: TUER-SG BT    002 0307  
       Revision: 14101005    Serial number: 0001712156
       Coding: 0011B6
       Shop #: WSC 01383 790 50316
       ASAM Dataset: EV_DCU52BrosePasseSide A03004
       ROD: EV_DCU52BrosePasseSide_VW36.rod
       VCID: A91A843CC871F40221-80FC
    
       Slave Passenger: 
       Subsystem 1 - Part No SW: 1K0 959 704 AG    HW: 1K0 959 794 R  Labels: 1K0-959-70X-GEN4.CLB
       Component: J389__TSG-HR  006 1401 
       Serial number: 00000005373095      
       Coding: 000090
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 77: Telephone (J412)       Labels:| 7P6-035-730.clb
       Part No SW: 7P6 035 730 B    HW: 7P6 035 730 B
       Component: TELEFON       H05 0440  
       Revision: 1B001001    Serial number: 00007668680859
       Coding: 0A01000000010101
       Shop #: WSC 01383 790 50316
       ASAM Dataset: UHVNA A01007
       ROD: UHVNA.rod
       VCID: B12A6C5CE0A18CC2E9-80E4
    
    No fault code found.
    
    End----------(Elapsed Time: 01:14, VBatt start/end: 14.1V/14.0V)-----------
    Last edited by Yourgis; 11-29-2018 at 01:48 AM.

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  3. #2
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    In my country there is a saying: prepare the horse sleigh in the summer, and the carriage in the winter. So I still haven't found an answer yet and have been driving throughout all the winter without it. Is there any way to find out which condition that bite indicates? Any thoughts are welcome

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