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:
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: