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Where is the coolant temperature sending unit located

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It does not have one if you have a 4.6 engine

Posted on Mar 26, 2011

  • frank thomas wilson
    frank thomas wilson Mar 26, 2011

    If your original owner's manual is missing, download a soft copy fromhttp://www.fleet.ford.com under the MAINTENANCE tab.

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Where is the coolant temperature sensor located on 1990 pontiac transport


The Coolant Temperature Sensor is located: Under hood, driver side, upper engine area, front of distributor, mounted in intake manifold

Sep 09, 2012 | Pontiac Trans Sport Cars & Trucks

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1998 nissan maxima runs hot, replaced the thermostat and at times gauge still register hot, what else could cause this?


Its possible that your problem also stay in the Engine Coolant Temperature (ECT) sensor resistance changes in response to engine coolant temperature.

Keep in mindthat the sensor resistance decreases as coolant temperature increases. This provides a reference signal, which indicates engine coolant temperature, to the ECM.



10_12_2011_2_44_56_pm.gif

Fig.: Compare the sensor readings with these values



10_12_2011_2_47_01_pm.gif

Fig.: Location of the thermal sending unit (A) next to the coolant temperature sensor (B)

Keep us updated.

Oct 12, 2011 | 1998 Nissan Maxima

1 Answer

Temperature gauge don't work..


Sounds like you may have a problem with your coolant temperature sending unit or thermostat, locate your sending unit, unplug the electrical connector run a jumper wire across the 2 wires inside the connector the gauge should read hot when the jumper wires are connected and when you remove the jumper wire it should go back to cold this verifies your gauge and all related wiring are working properly, if it doesnt work as described you either have a wiring problem or a bad temp gauge, next if your heater output is suffering you more then likely have a weak thermostat staying open or partially open replace the thermostat with a new unit, however if you arent experiencing any heater trouble replace your coolant temperature sending unit because your thermostat is more then likely working properly.....

Dec 10, 2010 | Pontiac Grand Am Cars & Trucks

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The check enging light comes on then goes off. I foud out the code po118 engine coolant temp circut high input. is it the coolant temp sensor. if so how do I replace it. It is on a 2004 jetta tdi


According to Autozone.com:

Because ECT (engine coolant temperature) sensor procedures vary depending upon their location, first locate the part. You may need to partially drain the engine coolant to prevent coolant spillage.
  • Disconnect the negative battery cable.
  • Unplug the ECT.
  • Then, unscrew it.
  • Reverse the removal procedures to install the new part.
  • Connect the negative battery cable to the battery.



    Related Parts:
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Coolant Temperature Sensor printpage_icon.gif



0900c152801bfc38.jpg enlarge_icon.gifenlarge_tooltip.gif

Fig. Remove the coolant temperature sensor
The coolant temperature gauge sensor is a temperature-variable resistor, or thermistor. As coolant temperature increases, the resistance of the sensor decreases or decreases, depending on the type of sensor.
A1 and A2 platforms use a different type of circuit that A3 vehicles. On A1 and A2 vehicles, the circuit is a "resistance to ground" type. A3 vehicles use a "variable voltage" type, where a voltage is supplied to the sensor. Because of the circuitry design on A3 vehicles, testing of the coolant temperature gauge is limited.
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.
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.

0900c152801bfc39.jpg enlarge_icon.gifenlarge_tooltip.gif

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


0900c152801bfc3a.jpg enlarge_icon.gifenlarge_tooltip.gif

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

Oct 17, 2010 | 2004 Volkswagen Jetta

1 Answer

How to install a coolant temp sensor in a 1995 ford escort engine 1.9 liter


REMOVAL & INSTALLATION 1.8L and 1.9L Engines CAUTION
Never open, service or drain the radiator or cooling system when hot; serious burns can occur from the steam and hot coolant. Also, when draining engine coolant, keep in mind that cats and dogs are attracted to ethylene glycol antifreeze and could drink any that is left in an uncovered container or in puddles on the ground. This will prove fatal in sufficient quantities. Always drain coolant into a sealable container. Coolant should be reused unless it is contaminated or is several years old.
  1. Locate the coolant temperature sending unit on the engine.
  2. Disconnect the sending unit electrical harness.
  3. Drain the engine coolant below the level of the switch.
  4. Unfasten and remove the sending unit from the engine.
  5. If the same sender is to be replaced, remove and discard the O-ring. To install:
  6. If reusing the old sender, install a new O-ring.
  7. Coat the new sending unit with Teflontape or electrically conductive sealer.
  8. Install the sending unit and tighten to 18–22 ft. lbs. (25–29 Nm).
  9. Attach the sending unit's electrical connector.
  10. Fill the engine with coolant.
  11. Start the engine, allow it to reach operating temperature and check for leaks.
  12. Check for proper sending unit operation.
2.0L SOHC Engines
  1. Disonnect the negative battery cable.
  2. If equipped, raise the car and remove the left-hand splash shield bolts.
  3. Loosen the petcock and partially drain the radiator.
  4. Lower the car, locate the sender and unplug its electrical connection.
  5. Unscrew the sender counterclockwise and remove it from the engine. Fig. 1: Unscrew the coolant temperature sender to remove it 90982g26.gif
    To install:
  6. Install the sender and tighten it to 13–17 ft. lbs. (17–24 Nm).
  7. Attach the sender electrical connection.
  8. If equipped, raise the car and install the left-hand splash shield bolts.
  9. Lower the car and fill the cooling system.
  10. Connect the negative battery cable.
2.0L DOHC Engines
  1. Disonnect the negative battery cable.
  2. Loosen the petcock and partially drain the radiator.
  3. Locate the sender and unplug its electrical connection.
  4. Unscrew the sender counterclockwise and remove it from the engine. Fig. 2: On 2.0L DOHC (VIN 3) engines, tighten the coolant temperature sender to 89–124 inch lbs. (10–14 Nm) 90982g27.gif
    To install:
  5. Install the sender and tighten it clockwise to 89–124 inch lbs. (10–14 Nm).
  6. Attach the sender electrical connection and fill the cooling system.
  7. Connect the negative battery cable.
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Jul 07, 2010 | 1995 Ford Escort

1 Answer

Where is the temperature sending unit located on a 2000 chevy s10 2.2 four cylinder engine


The temperature sending unit is screwed into cylinder head. Careful you also have a coolant temperature sensor that threads into intake manifold. Temp sending unit is how your guage knows how hot your engine is. Coolant temp sensor is how your computer knows how hot or cold your engine is, so it can compensate fuel & air mixture.You can not put the wrong one in the wrong place, they will not fit. You change 1 for 1 reason & the other for another reason.

Jun 16, 2010 | 2000 Chevrolet S-10

1 Answer

Where are the temperature sending units located in a 1992 Buick Century


On the 2.5 4cyl. The temp. sensor is located on the
transmission side of the engine below the coolant outlet. The temp sending unit is in the head in front of
the coolant outlet. On the 3.3 v6 the temp sensor is on the right side of the engine below the alternator.
The temp sending unit is to the left of the sensor.
Hope this helps.

Mar 18, 2010 | 1992 Buick Century

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).

225902c.jpg

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


2ae243e.jpg

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

2 Answers

Location of the temperature sending unit on a 1991 olds toronado


Ok, you have three sensors on this engine that work together to manage the temperature reading that are sent to the gauge. i recommend checking all three to be safe. i will list the sensors and, locations below.

1. Coolant temperature sensor- Under hood, driver side, upper engine area, above transmission bell housing, mounted in driver side end of intake manifold.

2. Engine Temperature sensor- Under hood, driver side, upper engine area, mounted on rear cylinder head

3. Temperature switch.- Under hood, center, lower engine area, above oil filter, rear of coolant temperature sensor, mounted in engine block




Jul 09, 2009 | 1991 Oldsmobile Toronado

1 Answer

My 1997 Escort temperature guage goes off the scale when I switch it on. Have filled coolant.


the temperature sending unit which only controls the gauge is bad it is located on the left of the cylinder head very close to the exhaust manifold, first check and makes sure that rhe wire is not grounding if the wire is ok replace the temperature sending unit

Nov 19, 2008 | Ford Escort Cars & Trucks

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