Normal Operating Temp?

Discussion in 'Mk5 VW Jetta, Sportwagen, and Audi A3 TDI forum' started by DanLar27, Jan 8, 2018.

  1. DanLar27

    DanLar27 New Member

    Joined:
    Apr 28, 2017
    Messages:
    7
    Car:
    2005.5 Jetta TDI 1.9 BRM (MKV)
    Location:
    CA
    Does anyone know at what temp the radiator fans should be kicking on?

    Background: I just installed a new coolant temp sensor, my temp stays at about 190, but I never see the electric fans turn on. They turn on when I run the AC, so I know they work, but without using the AC, they do not turn on at all. Two questions for the group:

    1. At what temp should the fans be turning on?
    2. Name the component that controls when the fans turn on.

    Thanks in advance!

    2005.5 Jetta (mkv), 1.9 TDI, BRM engine
     
  2. Keithuk

    Keithuk Super Moderator

    Joined:
    Aug 29, 2010
    Messages:
    7,235
    Car:
    2010 Golf GTD (170) CBBB
    Location:
    Stoke on Trent, England
    My fan kicks in just over normal running temperature. I've never checked the actual temperature the fan kicks in with VCDS.

    What controls the fan I would say its Coolant Fan Control Module (J293) Radiator Fan Control Unit (J293) or Coolant Fan Control Module 2 (J671) Radiator Fan Control Unit 2 (J671).

    Do you have a fuse & relay layout?

    There are a few fuses for the Radiator fan (V7)

    Fuse & Relay PDF Files
     
    DanLar27 likes this.
  3. DanLar27

    DanLar27 New Member

    Joined:
    Apr 28, 2017
    Messages:
    7
    Car:
    2005.5 Jetta TDI 1.9 BRM (MKV)
    Location:
    CA
    I was looking at the owners manual, and there are two slots for a "Fan" that take a 40 amp fuse. One of the fuses is not even there. I've been driving this car for 5 years and never noticed it or payed attention to the missing fuse since I've never had a problem with it overheating... I wont know if this is the issue until I can purchase a fuse in the morning.
     
  4. Keithuk

    Keithuk Super Moderator

    Joined:
    Aug 29, 2010
    Messages:
    7,235
    Car:
    2010 Golf GTD (170) CBBB
    Location:
    Stoke on Trent, England
    I've looked for Coolant Fan Control Module (J293) in another PDF that shows all wiring diagrams BXE not BRM those the engine code doesn't make much difference when it comes to fuse & relays.

    There are a few fuses for the Radiator fan (V7) which it shows.

    You have asked for my fuse & relay PDF, which I've replied.
     
    Last edited: Jan 9, 2018
  5. DanLar27

    DanLar27 New Member

    Joined:
    Apr 28, 2017
    Messages:
    7
    Car:
    2005.5 Jetta TDI 1.9 BRM (MKV)
    Location:
    CA
    So I replaced the missing fuse today, but fans still do not kick on when engine is running. I did some more research, and I believe the large fan has a built in fan control module. If that's the case, then I'll need to replace the whole fan.
     
  6. mikeme

    mikeme Active Member

    Joined:
    Jan 29, 2013
    Messages:
    644
    Car:
    2009 JSW TDI 205,000 miles sold back to VW after 6 hour emissions fix took over 4 moths
    Location:
    Northern Virginia
    you might want to check for logged errors related to the fan.

    it is not unusual to have the fans not come on until they need to.

    you can just drive the car, until you see an error, or notice the coolant temperature gauge move higher than the straight up positon,
     

Share This Page