Question about 2003 Volkswagen Jetta TDI

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I need to replace a glow plug on my 2002 Jetta TDI.

I have a Chiltons manual and it says to disconnect the engine coolant temperature sensor, but I can't find it with the picture they provide.

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  • jrjakes Mar 03, 2009

    I did do an engine scan, I don't have the scan number but it said the #3 glow plug was bad.

  • passatsyncro May 11, 2010

    The best way to double check the glow plugs (i found) is with an ohm meter, remove top engine cover and just by the diesel pump you will see 4 small glow plug connectors. Pull straight up to disconnect all 4. Put one lead to ground and the other lead to the top of the glow plug, should be around 2 ohms or less. Measure all 4 glow plugs. let me know how it goes. There may be other issues. Also VW parts dept should know, TDI used beru glow plugs and Bosch, all 4 glow plugs should be the same make.

  • passatsyncro May 11, 2010

    Just a couple questions, why are replacing glow plug(s)? and the coolant temp sensor does not have to be disconnected. Was there an engine scan done? any code?

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I'm not sure about a 2002, but I have a 2003 and we didn't have to take off the engin coolant temp. sensor. We needed the #4 glow plug replaced and this is how we did it. We took off the motor cover by undoing the threee bolts, then there is a rubber "bar" across in front of the injectors.. pull these up one by one by holding onto the ends and there you will find the glow plugs. You will need a 10mm deep socket to undo these. We replaced the last one on the right ( thinking that it would be the #4) wrong... the firing order is 1342 but the last one one the right is not #4, so to make sure that they wore evenly we replaced all four of them. When you have tightened in the glow plug(s) make sure you put the rubber plug end on with a "snap". Replace everything that you took off and put the motor cover back on. This worked for us hopefully for you, too.

Posted on Mar 29, 2009

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Temp sensor on 1998 toyota tacoma 3400


The engine coolant temperature sensor is usually located on the thermostat housing. This sensor controls the readings of the coolant temperature gauge in your vehicle when the ignition switch is ON .Here's a link to the sensor. REMOVAL & INSTALLATION

  1. Drain the coolant from the vehicle.
  2. Disconnect the engine wiring protector from the brackets.
  3. Disconnect the sensor wire.
  4. Using a 19mm deep socket, remove the sensor and gasket.
To install:
  1. Apply a thin coat of Loctite or equivalent to the switch. By hand, carefully thread the switch into the engine. If resistance is felt at all, remove the switch and inspect the threads for any damage. Continue to install the switch. Once installed, tighten to 14 ft. lbs. (20 Nm).
  2. Connect the sensor wiring.
  3. Install the engine wire protector to the brackets.
  4. Refill the coolant. Start the engine and check for leaks.
http://www.autozone.com/engine-management/coolant-temperature-sensor/duralast-coolant-temperature-sensor/toyota/tacoma-2wd/1998/6-cylinders-n-3-4l-efi-dohc/61401_0_18589

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1 Answer

Location of engine coolant temperature sensor


Automobiles: 2000 Ford Escort ZX2 4-cylinder 2.0L MFI DOHC

NOTE
The "left" side of the engine is the driver's side.

The Engine Coolant Temperature (ECT) sensor is a thermistor (a device which changes resistance or voltage as temperature changes). The sensor detects the temperature of engine coolant and provides a corresponding signal to the PCM (Powertrain Control Module - aka "the car's computer").

The ECT sensor is mounted in the following locations (small Ford engines):

1.8L engines: in the cylinder head
1.9L engines: threaded into the heater hose inlet pipe
2.0L engines: at the left rear of the engine

2.0L Zetec Engine

(1) Partially drain the engine cooling system using a clean container. If coolant is in good condition, retain for reuse.
(2) Disconnect the battery ground cable.
(3) Disconnect the electrical wiring connector from the engine coolant temperature (ECT) sensor.
(4) Remove the retaining clip and the ECT sensor.


12_5_2011_5_38_05_pm.jpg

Fig. 1 Escort ZX2 ECT sensor - The retaining clip is removed (at the solid arrow). Withdraw ECT sensor by gently wiggling/pulling in the direction of the dashed arrow.

To install:

NOTE
Coat the ECT sensor O-ring with clean coolant prior to installation.

(1) Replace the retaining clip and the ECT sensor.
(2) Connect the electrical wiring connector from the Engine Coolant Temperature (ECT) sensor.
(3) Connect the battery ground cable.
(4) Refill the engine cooling system. An inexpensive plastic "Radiator Funnel" will help with this task.

Dec 05, 2011 | 2000 Ford Escort

1 Answer

Where is the coolant sensor on a 93 century. 3.3 v6 I can't find where it is located. Top or bottom? Front or back?


A variety of sensors provide information to the ECM/PCM regarding engine operating characteristics. These sensors and their functions are described below. Be sure to take note that not every sensor described is used with every engine application. Coolant Temperature (ECT) The Engine Coolant Temperature Sensor (ECT) is a thermister (a resistor which changes value based on temperature) mounted on the engine coolant stream. As the temperature of the engine coolant changes, the resistance of the coolant sensor changes. Low coolant temperature produces a high resistance (100,000 ohms at 40°C/40°F), while high temperature causes low resistance (70 ohms at 130°C/266°F). The ECM/PCM supplies a 5 volt signal to the coolant sensor and measures the voltage that returns. By measuring the voltage change, the ECM/PCM determines the engine coolant temperature. The voltage will be high when the engine is cold and low when the engine is hot. This information is used to control fuel management, IAC, spark timing, EGR, canister purge and other engine operating conditions. A failure in the coolant sensor circuit should either set a Code 14 or 15. These codes indicate a failure in the coolant temperature sensor circuit.
---
It looks like the above, under hood, passenger side, upper engine area, mounted in front side of water outlet (according to Autozone.com).

Oct 08, 2010 | Buick Century Cars & Trucks

1 Answer

How do you replace coolant temperature sensor on an 2001 Oldsmobile Intrigue


Removal & Installation To Remove:
ECT sensor 3.5L engine 93174g14.gif

  1. Disconnect the battery ground cable.
  2. Drain the coolant below the level of the engine coolant temperature (ECT) sensor.
  3. Disconnect the ECT sensor electrical connector.
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To Install:
WARNING
Damage to the coolant sensor will affect the operation of the fuel control system.
  1. Coat the ECT sensor threads with thread sealer.
  2. Install the ECT sensor. Tighten the sensor to 15 ft lb (20 Nm) on 3.5L engines and 22 ft lb (30 Nm) on 3.8L engines.
  3. Install the ECT sensor electrical connector.
  4. Connect the battery ground cable.
  5. Refill the cooling system using the recommended procedure.
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Aug 29, 2010 | 2001 Oldsmobile Intrigue

1 Answer

How to change the radiator fan?


Electric Engine Fan - Fan Switch

Removal & Installation
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  1. Disconnect negative battery cable.
  2. Partially drain cooling system.
  3. Disconnect the electrical connector .
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To install:
  1. Apply thread sealant to sensor threads.
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3.2L And 3.5L Engines
  1. Disconnect negative battery cable.
  2. Partially drain cooling system.
  3. With the engine cold, disconnect coolant sensor electrical connector.
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  3. Attach electrical connector to sensor.
  4. Connect negative battery cable.
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    f9d971c.jpg
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  3. Connect cooling fan electrical connector.
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Hope helps (remember comment and rated this).

Jul 13, 2010 | 2001 Dodge Intrepid

1 Answer

Trouble locating cooling sensor on 2003 gmc envoy


4.2L Engine To Remove:
  1. Disconnect the negative battery cable from the battery.
  2. Drain the coolant from the engine.
  3. Disconnect the engine coolant temperature (ECT) sensor connector. Engine coolant temperature sensor removal and installation gm-04-42-1509.gif

  4. Remove the engine coolant temperature (ECT) sensor from the engine.
To Install:
  1. Apply thread sealer P/N 12346004 or equivalent to the engine coolant temperature (ECT) sensor threads.
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5.3L & 6.0L Engines To Remove:
  1. Drain the coolant from the engine.
  2. Disconnect the engine coolant temperature (ECT) sensor connector. Engine coolant temperature sensor removal and installation removeect.gif

  3. Remove the engine coolant temperature (ECT) sensor from the left cylinder head.
To Install:
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1 Answer

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Hi!!

Thermostat location in 5 cil. engines, temp sensor is located just right or upper arrow in picture. I've included a picture of temp sensor and installation instruccions.

0900c152801c11fb.jpg

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. Drain the engine coolant.
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    0900c152801c1206.jpg enlarge_icon.gifenlarge_tooltip.gif Fig. Coolant temperature sensor illustrated
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To install:
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If helpful, click below, good luck.

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2 Answers

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Here are the instructions from chiltons.

Removal & Installation
  1. Disconnect negative battery cable.
  2. Drain cooling system below thermostat housing level.
  3. Remove thermostat.
  4. Disconnect engine coolant temperature sensor.
  5. Disconnect heater supply hose.
  6. Turbocharger equipped vehicles:
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  8. Remove housing and gasket.
To install:



  1. Clean all gasket sealing surfaces.
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  3. Turbocharger equipped vehicles:
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  5. Connect engine coolant temperature sensor.
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Please do not hesitate to ask further questions about your vehicle.
please do not forget to rate and comment about your experience with fixya.

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1 Answer

Where is the engine coolant sensor located on a 2000 ford f150 V8 4.6 L?


please rate as fixya if this helps

SECTION 303-14: Electronic Engine Controls 2000 F-150 Workshop Manual
REMOVAL AND INSTALLATION Engine Coolant Temperature (ECT) Sensor — 4.6L and 5.4L Removal and Installation
  1. Remove the engine coolant temperature (ECT) sensor.
    1. Disconnect the electrical connector.
    1. Remove the ECT sensor.
ae8a8e7.gif The ECT sensor:
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The ECT measures the temperature of the engine coolant. The sensor is threaded into an engine coolant passage.

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