Relay clicking and fan going with ignition. CAYC

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vagcars69

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Scractching my head with this one. Ecm relay is clicking like crazy and fan would start too. Relay already replaced, tried disconnecting various engine components but didn't help. Any ideas?

Code: 
Monday,12,February,2024,15:39:44:45700
VCDS -- Windows Based VAG/VAS Emulator Running on Windows 10 x64
VCDS Version: 23.11.0.0 (x64)  HEX-V2 CB: 0.4643.4
Data version: 20231027 DS351.0
www.Ross-Tech.com


VIN: WVWZZZ1KZAW31****   License Plate: GOLFS
Mileage: 234710km-145842mi   Repair Order: 



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


Chassis Type: 1K-VW36 (1K0)
Scan: 01 03 08 09 15 16 17 19 25 42 44 46 52 56

VIN: WVWZZZ1KZAW314629   Mileage: 234710km-145842miles

01-Engine -- Status: Malfunction 0010
03-ABS Brakes -- Status: Malfunction 0010
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: Malfunction 0010
19-CAN Gateway -- Status: OK 0000
25-Immobilizer -- Status: OK 0000
42-Door Elect, Driver -- Status: OK 0000
44-Steering Assist -- Status: Malfunction 0010
46-Central Conv. -- Status: OK 0000
52-Door Elect, Pass. -- Status: OK 0000
56-Radio -- Status: Malfunction 0010
-------------------------------------------------------------------------------
Address 01: Engine (J623-CAYC)       Labels:. 03L-906-023-CAY.clb
   Part No SW: 03L 997 557 M    HW: 03L 906 023 A
   Component: R4 1.6l TDI   H23 9983  
   Revision: --H23---    Serial number: 00000000000000 CVN: C9BED9C6
   Coding: 00114014030500080000
   Shop #: WSC 00653 210 61898
   ASAM Dataset: EV_ECM16TDI02103L997557M 003003
   ROD: EV_ECM16TDI02103L997557M.rod
   VCID: 46D55259782CC57A55F-8012
   VINID: 9E69EAAAA05BA919C304418224239CA076

10 Faults Found:
7362 - Glow Plug Control Module (J179) 
          P0684 00 [01100101] - Implausible Signal
          Not Confirmed - Tested Since Memory Clear
7345 - Particulate Filter; Differential Pressure Sensor 
          P2455 00 [10100101] - Short to Plus
          MIL ON - Not Confirmed - Tested Since Memory Clear
10232 - Valve for Fuel Metering (N290) 
          P0091 00 [10100101] - Short to Ground
          MIL ON - Not Confirmed - Tested Since Memory Clear
10231 - Valve for Fuel Metering (N290) 
          P0090 00 [10100101] - Open Circuit
          MIL ON - Not Confirmed - Tested Since Memory Clear
10114 - Fuel Pressure Regulator Valve (N276) 
          P2295 00 [10100101] - Short to Ground
          MIL ON - Not Confirmed - Tested Since Memory Clear
10113 - Fuel Pressure Regulator Valve (N276) 
          P2294 00 [10100101] - Open Circuit
          MIL ON - Not Confirmed - Tested Since Memory Clear
9875 - Boost Pressure Control Valve/Solenoid (Bank 1) 
          P0047 00 [10100101] - Short to GND
          MIL ON - Not Confirmed - Tested Since Memory Clear
9874 - Boost Pressure Control Valve/Solenoid (Bank 1) 
          P0045 00 [10100101] - Open Circuit
          MIL ON - Not Confirmed - Tested Since Memory Clear
9871 - Exhaust Gas Recirculation Cooling Valve Control 
          P2425 00 [00100101] - Open Circuit
          Not Confirmed - Tested Since Memory Clear
10125 - ECM Power Relay Control Circuit 
          P0687 00 [10100101] - Short to Plus
          MIL ON - Not Confirmed - Tested Since Memory Clear
Readiness: 0 0 0 0 1 

-------------------------------------------------------------------------------
Address 03: ABS Brakes (J104)       Labels:. 1K0-907-379-60EC1F.clb
   Part No SW: 1K0 907 379 AH    HW: 1K0 907 379 AH
   Component: ESP MK60EC1   H30 0107  
   Revision: 00H30001    
   Coding: 133B200D092300FEC81104E690220081300000
   Shop #: WSC 01357 011 00200
   VCID: 78A9ECA142D8638A173-802C

4 Faults Found:
01314 - Engine Control Module 
            004 - No Signal/Communication - Intermittent
01309 - Power Steering Control Module (J500) 
            004 - No Signal/Communication - Intermittent
01314 - Engine Control Module 
            013 - Check DTC Memory - Intermittent
00778 - Steering Angle Sensor (G85) 
            004 - No Signal/Communication

-------------------------------------------------------------------------------
Address 08: Auto HVAC (J301)       Labels:| 3C8-907-336.clb
   Part No SW: 3C8 907 336 AB    HW: 3C8 907 336 AB
   Component: Climatic      H14 0305  
   Revision: 00009001    
   Coding: 0000000002
   Shop #: WSC 01357 011 00200
   ASAM Dataset: EV_Climatic A01005
   ROD: EV_ClimaBasis_VW36.rod
   VCID: 6D87CDF53D1AD622F45-8038

No fault code found.

-------------------------------------------------------------------------------
Address 09: Cent. Elect. (J519)       Labels:. 1K0-937-08x-09.clb
   Part No SW: 1K0 937 085 D    HW: 1K0 937 085 D
   Component: BCM PQ35  B+  103 0575  
   Revision: 00103 AG    
   Coding: 40180A3A9023189044000080100000E443010088524D8160648000200000
   Shop #: WSC 01357 011 00200
   VCID: 30391481EA287BCA9F3-8064

   Subsystem 1 - Part No: 1K2 955 119 F  Labels: 1KX-955-119.CLB
   Component: Wischer 01021  21  0512 
   Coding: 009795

1 Fault Found:
01518 - Bulb for Back-Up Lights; Left (M16) 
            010 - Open or Short to Plus

-------------------------------------------------------------------------------
Address 15: Airbags (J234)       Labels:| 5K0-959-655.clb
   Part No SW: 5K0 959 655 D    HW: 5K0 959 655 D
   Component: AirbagVW10    037 0606  
   Serial number: 003FKRA3JFZI   Dataset Number: 5K0003v____ 0085
   Coding: 00003133
   Shop #: WSC 01357 011 00200
   ASAM Dataset: EV_AirbaVW10SMEVW360 A01011
   ROD: EV_AirbaVW10SMEVW360.rod
   VCID: 3B2333AD33EE88923A1-806E

   Crash sensor for side airbag: driver side: 
   Subsystem 1 - Part No SW: 5K0 959 354     HW: 5K0 959 354 
   Component: S.Sens.Fahr.V  H01 ---- 
   Serial number: 3572MSME00791251ZZZI

   Front Passenger's Side Airbag Crash Sensor: 
   Subsystem 2 - Part No SW: 5K0 959 354     HW: 5K0 959 354 
   Component: S.Sens.Beif.V  H01 ---- 
   Serial number: 3582MSME4B290250ZZZR

   Rear Side Airbag Crash Sensor (on driver's side): 
   Component: S.Sens.Fahr.H  --- ---- 
   Serial number: 3512QSME0C414D6AZZZ+

   Passenger side rear thorax airbag crash sensor: 
   Component: S.Sens.Beif.H  --- ---- 
   Serial number: 3522QSME3C3A4C09ZZZ2

No fault code found.

-------------------------------------------------------------------------------
Address 16: Steering wheel        Labels: 1K0-953-549-MY9.lbl
   Part No SW: 1K0 953 549 CQ    HW: 1K0 953 549 CQ
   Component: J0527           053 0111  
   Coding: 0000004
   Shop #: WSC 01357 011 00200
   VCID: 03538B4D071E3052321-8056

No fault code found.

-------------------------------------------------------------------------------
Address 17: Instruments (J285)       Labels:| 5K0-920-xxx-17.clb-SRI1
   Part No SW: 5K0 920 960 N    HW: 5K0 920 960 N
   Component: KOMBI         H04 0308  
   Serial number: 00000000000000
   Coding: 770800
   Shop #: WSC 01357 011 00200
   ASAM Dataset: EV_Kombi_UDS_VDD_RM09 A04052
   ROD: EV_Kombi_UDS_VDD_RM09_004_VW32.rod
   VCID: 38292CA102D8A38AD73-806C

1 Fault Found:
9453842 - Oil Level Thermal Sensor 
          B1041 35 [00001001] - Signal High Time > Maximum
          Confirmed - Tested Since Memory Clear

-------------------------------------------------------------------------------
Address 19: CAN Gateway        Labels:. 1K0-907-530-V4.clb
   Part No SW: 1K0 907 530 AD    HW: 1K0 907 951 
   Component: J533  Gateway   H07 0112  
   Revision:   H07 01    Serial number: 030210F2000726
   Coding: E9801F06000202000003
   Shop #: WSC 01357 011 00200
   VCID: 698FB9E50572CA0298D-803C

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          H04 0308  
   Serial number: 00000000000000
   Coding: 000000
   Shop #: WSC 00000 000 00000
   ASAM Dataset: EV_Immo_UDS_VDD_RM09 A03005
   ROD: EV_Immo_UDS_VDD_RM09_VW21.rod
   VCID: 6A8DC6E90CF4C11A917-803E

No fault code found.

-------------------------------------------------------------------------------
Address 42: Door Elect, Driver        Labels:. 1K0-959-701-MIN3.clb
   Part No SW: 5K0 959 701 B    HW: 5K0 959 701 B
   Component: Tuer-SG         009 2114  
   Coding: 0000564
   Shop #: WSC 01357 011 00200
   VCID: 313F1185ED2272C290D-8064

No fault code found.

-------------------------------------------------------------------------------
Address 44: Steering Assist        Labels: 1K0-909-14x-GEN3.clb
   Part No: 1K0 909 144 J
   Component: EPS_ZFLS Kl. 69     3001  
   Revision: 00H17000    
   Shop #: WSC 01357 011 00200
   VCID: 313F1185ED2272C290D-8064

1 Fault Found:
03803 - Steering Angle Sensor for Steering Aid 
            000 - - - MIL ON

-------------------------------------------------------------------------------
Address 52: Door Elect, Pass.        Labels:. 1K0-959-702-MIN3.clb
   Part No SW: 5K0 959 702 B    HW: 5K0 959 702 B
   Component: Tuer-SG         009 2114  
   Coding: 0000564
   Shop #: WSC 01357 011 00200
   VCID: 323D1E89E82449DAE97-8066

No fault code found.

-------------------------------------------------------------------------------
Address 56: Radio (J503)       Labels:. 5M0-035-1xx-56.clb
   Part No SW: 1K0 035 156 B    HW: 1K0 035 156 B
   Component: Radio         510 0521  
   Revision: R0510005    Serial number: VWZ5Z1K0263980
   Coding: 0000020002
   Shop #: WSC 01357 011 00200
   VCID: 221DEEC9B4C4D95A197-8076

1 Fault Found:
00856 - Radio Antenna 
            011 - Open Circuit

End----------(Elapsed Time: 00:48, VBatt start/end: 12.3V/12.1V)-----------
 
   #2  
Uwe

Uwe

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Clearly an electrical problem, but I'm no sure how to diagnose that remotely.

I'd start with ECM relay. "Control Circuit - Short to Plus" might be a bad ground somewhere?

-Uwe-
 
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siLc

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N276, N290 and most of the other stuff is powered by a Terminal 30 relay J317 located in the engine bay fusebox. Fuse SB10 is intact and has a steady +12V present? That is the power supply for the switching side of this relay. This relay is actuated by the ECM with a ground. This ground is also steady and not flicking on/off?
 
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vagcars69

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Grounds are fine and steady. Fuse 10 is perfectly fine and has staedy 12v.
Something is causing
a- a fan to go off at random even with car locked.
b- when you can hear relay clicking voltage on terminal 30 and fuses 13/14/15 fluctuate in range 6-12v. Does it flicker because of voltage drop or relay causing voltage drop?
Would one of the components on terminal 30 cause a short somewhere?
 
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siLc

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The consumers on the switched side of a relay cannot affect the switching side if the relay itself is internally good.

Those fuses are fed by this relay, thus it proves that the relay clicking on/off is affecting the voltage those consmers are receiving. If SB10 has good voltage, then it only leaves the ECM as the ground switcher as the culprit...or the fusebox itself and/or the wire connection from the ECM to the fusebox.
 
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vagcars69

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Makes sense.
Tried different ecu and it would do same thing. Fan would go off without ecu too. So stripped fuse box and found water ingress. That would indicate the issue. Will order another fuse box hopefully that will solve it.


Update:
New fuse box resolved the issue.
Thanks for your help!
 
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