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2004 VW Passat Engine Thermostatic Fan Temperature Switch location Where is it

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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: 2004 VW Jetta engine compartment fuze box location

one is located over the battery, the other is located in the side of the dash.

First panel:
If you pop your hood the battery will be on your right sid in the front of the engine bay. There is a small rectangular piece on top of the battery with a lot of heavy guage red wires going to it. That is the engine bay fuse box.

Second panel:
if you open your driver side car door it's under neath a panel located inbetween the door and the dash board.

Posted on Jun 03, 2009

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SOURCE: I have a 2004 VW Passat. Rear Passenger window issue

sounds like your window regulator is going out

Posted on Sep 03, 2009

ZJLimited
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SOURCE: Where is the temperature sending unit on a 1999 VW

VW Passat & Audi A4 1990-2000

Motronic System
The Engine Coolant Temperature (ECT) sensor is mounted in the water outlet on the back side of the head. If you vehicle still has a original VW part it will be black in color with a four terminal connector. This device signals the engine management system with the current coolant temperature, the ECU takes this information and uses it to control other such circuits as the idle speed, knock control system, oxygen sensor circuit, exhaust gas recalculation, and fuel tank venting. It is also important to note that if at any time ECU does not receive a signal from the ECT it will substitute a value of 176°F (80°C).

VR6
The Engine Coolant Temperature sensor is mounted in the thermostat housing. The body of the sensor will be blue and the sensor will be blue and have two terminals if it is an original factory VW part.


The engine coolant temperature gauge uses a heat sensitive sending unit to transmit an electrical signal to the gauge. The sending unit is a heat sensitive variable resistor that is located on or near to the cylinder head and threads into an engine coolant passage. The sensors are a Negative Temperature Coefficient (NTC) type. As the temperature increases, the electrical resistance of the sensor decreases. As the coolant temperature changes, so does the resistance of the sensor. The gauge is calibrated within the operating range of the sensor and interprets the resistance value to display the coolant temperature.On models produced prior to 1994, the engine coolant gauge temperature sensor is a single wire terminal sensor.

Beginning with model year 1994, the engine coolant gauge and the Engine Control Module (ECM) temperature sensors were combined into one sensor with 4 terminals. The basic operation remains the same in that their resistance decreases as the coolant temperature increases, however the actual resistance values of the 2 sensor circuits are different. The electrical connector of the 4-wire terminal sensor (1 and 2) is keyed to prevent improper connection of the sensor's electrical circuit.

WARNING When trouble shooting electrical components, always consult a wiring diagram for the particular year, make and model to ensure proper test equipment connection and diagnosis. Failure to use suitable test equipment and testing methods could permanently damage the electrical component(s).

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Fig. Beginning with model year 1994, the Engine Coolant Temperature Sensors combined the sensors for the ECM and the gauge into one sensor-1997 2.8L V6 sensor shown


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Fig. The electrical connector for the combined temperature sensors is keyed to avoid improperly connecting the sensor's wiring-1997 2.8L V6 connector shown

I hope help you with this, good luck (remember rated this help).

Posted on Oct 13, 2009

  • 271 Answers

SOURCE: where is the coolant temperature sensor located on

On a back side of a cylinder head.Very difficult to rich .

Posted on Jan 18, 2010

  • 84 Answers

SOURCE: 2004 vw passat check engine light .

This car has 2 separate temp sensors, 1 for the computer and 1for the gauge, you need to be sure the engine is not overheating first, but most likely it's a bad coolant temp sensor causing a false reading..

Posted on Jun 10, 2012

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Inertia switch on 04 VW Passat


All these switches I have found are on the passenger side. Either in the trunk or behind the kick panel on the passenger side. Rarely do these go bad.. And they only need reset if you have a front end accident. If you are not getting fuel check the fuses and or the fuel pressure.

Nov 09, 2014 | 2004 Volkswagen Passat

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Location of thermostatic switch 1993 Buick Regal 3.8 motor fan motors don't run


The fans are controlled by the ECM and it uses the ECT sensor for temperature sensing, so if the check engine light isn't on the sensor is not the problem. You need to have an active test run on the fan system to see what code is returned. Have you tried powering up the fans at the relay?

Oct 26, 2012 | 1993 Buick Regal

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Trying to locate the engine temperature sensor on 2004 VW Passat 1.8 Turbo


it has a green ring around the base, located on top of the engine near the large hose that goes from the top of the radiator to the top of the engine.

Jun 06, 2011 | Volkswagen Passat Cars & Trucks

1 Answer

I just saw a similar post for a 2000 Passat turbo fan turning on after the car is shut down. This drains the battery overnight. No engine light comes on. Just as the other post says it is the turbo fan,...


I know that on the earlier model VW's there was an underhood thermostatic switch for the electric fans. This switch would keep the fans running until the underhood temperature reached a desired level. If this switch were to go bad, it would most definitely cause the problem that you are describing.

May 02, 2011 | Volkswagen Passat Cars & Trucks

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I have a problem with a fan running after I turn off my 2000 Passat Turbo. One mechanic suggested it was a turbo blower. The problem is that the fan runs the battery dead overnight. Any suggestions?


I know that on the earlier model VW's there was an underhood thermostatic switch for the electric fans. This switch would keep the fans running until the underhood temperature reached a desired level. If this switch were to go bad, it would most definitely cause the problem that you are describing.

May 02, 2011 | 2000 Volkswagen Passat 4Motion

1 Answer

WHERE IS THERMOSTAT LOCATED ON 2000 VW PASSAT AJM ENGINE


Heed of antifreeze coolant temperature!!!
First time you might check the thermostat operating.
The thermostat location for VW Passat 4Motion 1.9 TDI - AJM engine, is on back of the alternator at the bottom side of the bracket.
IMPORTANT: It is NOT necessary to replace the alternator if you want to change the thermostat !!!
Thermostat checking:
1. Cold engine. Start up the engine and watch of the water temp indicator. After first value 60 Celsius Degree you still warm up the engine until the lifter (pointer) reach 80 C deg. (second mark after 60 C deg.). At this time you let engine running at idle speed and check with your hand the thermostat plastic housing and hose temperature in bottom left side of the engine. Heed of alternator driving belt and ventilator fan !!!
2. If the thermostat is good the hose must be cold until the water temp indicator reach almost 90 C deg.
3. The thermostat opening temperature is 87 C deg.
4. If the hose is already warm the thermostat is out of order.

Thermostat location, Part number: 044121113, in german - "Kuehlregle" (Price around $25):

tdisline_142.jpg
Important note: Always replace the thermostat seal, position 7 in the above picture.

Please do rate my response. Thanks!

Jan 05, 2011 | 2000 Volkswagen Passat 4Motion

1 Answer

If running mutiple errands and the car has been startet and stopped after a few times when trying to start the engine the wont stay running.


Most modern vehicles using an electric cooling fan have a thermostatic switch that will allow them to run even after the engine is turned off. Start and stop driving can cause heat buildup in the block which can cause problems such as the one you have and if the fan isn't bringing the excessive heat down during a stop, the hot engine can refuse to idle or accept fuel as it should.
You should listen to see if the fan is turning on after the ignition is off; this is sometimes delayed for a minute or so until the thermostatic switch adjusts to the rising block temperature and starts the fan. If the main fan is belt-driven, it may be the AC fan that is used for this purpose.

Sep 24, 2010 | 2004 Mazda Tribute

2 Answers

Vw passat code p3081 what is it? And how do i fix it thanks


p3081 is the error code for the engine not reaching correct operating temperature. It could be an issue with the thermostat or the ECT (coolant temperature sensor) valve.

As far as how to repair those items, your best bet is to purchase a repair manual. It will save a lot of time and frustration.
Good luck hope this helps.

May 10, 2010 | 2004 Volkswagen Passat

2 Answers

I own an 1999 VW passat. I noticed that the passenger fan is not working? where do i locate the fan temperature sensor? Can I test the fan to make sure it's working?


I believe the other fan comes on when the A/C is running. I would run the engine and turn on the A/C and see if both fans work. You can check the plug going into the fan to check for power with a test light.

Apr 24, 2010 | 1999 Volkswagen Passat

1 Answer

Cooling fan not working


The fan runs on a thermostatic switch that will not start the fan until it gets above operating temperature. This thermostatic switch needs replaced.

Jun 01, 2009 | 2005 Volkswagen Passat

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