Question about 1999 Volkswagen Passat

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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?

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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.

Posted on Apr 24, 2010

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  • Volkswagen Master
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CHECK THE COOLANT FAN RELAY BOTH FANS HAS RELAYS.

Posted on May 11, 2010

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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

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Car door will not open. vw 1.8 1999 passat


remove door panel and check actuator for power and that actuator rod is connected and the plastic clip did not break or pop off

Nov 01, 2009 | 1999 Volkswagen Passat

3 Answers

Where is the temperature sending unit on a 1999 VW Passat located.


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).

Oct 13, 2009 | 1999 Volkswagen Passat

1 Answer

MY 2000 VW Passat Temperature Gauge rises to 90 but doesn't go above when the car overheats. What could be the problem?


faulty temperature sensor locate it going into the block and replace its located on the block itself usually drivers side or in the front has 1 wire coming out from it ...as far as overheating is concerned does the fan relay kick in and possibly you need the thermostat changed or is there enough radiator coolant in the radiator .

Sep 08, 2009 | 1999 Volkswagen Passat

1 Answer

I am trying to locate the relay panel on my 99 vw passat 2.8 gls. My electric cooling fan was broken so I replaced it last night and tested it on the battery to verify it works- but it is not getting power...


open the drivers door .. on the end of the dash (normally covered by the door) is a panel .. pop off that panel and the fuses are there .. of course fix the problem that caused the wires to burn then locate the fuse .. not easy since they give you a really cryptic guide to the fuses .. of course you should be able to see one thats blown .. if you cant read the gliphs then call a dealer to find out which fuse is which .. the relays are also behind the fuses .. again not marked except by big numbers stamped on each but no guide .. there are two fans .. the driver side is the cooling fan ..the passenger side is the air conditioner .. that is operated by a pressure switch in front of the condenser (front of car under gril on passenger side) .. .. likely a coolant temp switch operates the cooling fan .. actually i can check that if you need more info ..

Jun 30, 2009 | 1999 Volkswagen Passat

1 Answer

My vw passat tdi 05 radiator fan dose not come


check fuses..came across a bora with much same problem..it turned out to be a coolent tempreture switch the heater gauge wasn't working and on diagnostics it was reading -41degrees celcius the fan was not running because it thought it was freezing outside also blew the fuse of the fan also

Jun 18, 2009 | 1999 Volkswagen Passat

1 Answer

Belt configuration 2003 v6 3.0 VW Passat


go to google and type the year ( 2003 3.0(vw passat belt diagram ) i hope this works for you

Jan 26, 2009 | 1999 Volkswagen Passat

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