Question about 2001 Volkswagen Jetta TDI

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How do I gt to the 3 glow plugs in my cooling/heating unit??? (2001 Jetta TDi)

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  • online511 Jul 12, 2009

    Thanks for your quick reply, the VW repair shop told me that the Jetta tdi has 4 engine glow plugs and 3 glow plugs in the heating/cooling unit.(7 in all)
    the (check light) is on (the code reader shows code 380)but all 4 engine plugs are OK
    Are they pulling my leg by telling me the Jetta tdi has 7 glow plugs????

  • Joe Blow May 11, 2010

    You don't have glow plugs in your cooling/heating unit. What is it that you're trying to do? Glow plugs in a diesel are kind of like spark plugs in a regular car. Your car has 4 of them and they have nothing to do with heating or cooling. What problems are you having with your TDI?

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Have these guys ever seen a TDI ? THe 3 glow plugs for the coolant system are in plain sight just to the right of the head in the water neck . YES , 7 total !!!!!!!!!! easy to change . you can do it yourself . BTW a tech manual is cheap easy insurance to check whether or not someone is pulling your leg .

Posted on Oct 28, 2011

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They are absolutely pulling your leg if they're telling you that you have 7 glow plugs. It sounds like they don't have a clue about TDI's.
Everything you ever wanted or needed to know about TDI's can be found at www.tdiclub.com You should even be able to find a knowledgeable guy in your area that would be willing to take a look at your car. These guys know their stuff. Better than any VW dealer on the planet.
Read this thread - you might be able to figure something out on your own: http://forums.tdiclub.com/showthread.php?p=749854

Are you having problems with your heating/cooling? OR did you get a check engine light and found out about P0380 when you brought it to the shop?
You more than likely have an issue with your glow plug harness. The connectors on the glow plug harness (where they plug into your glow plugs) prob need to be cleaned. Read this thread too:

http://forums.tdiclub.com/showthread.php?t=188770&highlight=p0380




Posted on Jul 13, 2009

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1 Answer

2001 jetta tdi hard starting, white smoke


Check & replace all four glow plugs of the engine! See also if the glow plugs relay and power supply wires are in good condition. Good Luck!

Oct 23, 2011 | 2001 Volkswagen Jetta TDI

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The diagram in my haynes manual does not show some parts that are in my 2001 jetta tdi 1.9 turbo. i ran a diognostic and it says glow plug curcuit a malfunction, i changed the plugs and tested the coolant...


In addition to the 4 primary glow plugs, the cooling system also has 3 Coolant Glow Plugs to help provide extra heat to the cooling system in order to warm-up the vehicle's interior more quickly, and enhance overall engine warm-up time. (Example - Some Mercedes diesel engines use electrical heaters in the cabin because their engine is so thermally efficient.)
Likewise, this auxiliary source of heat from the 3 Coolant Glow Plugs is necessary because of the VW 1.9 TDI engines outstanding efficiency, which wastes very little heat.


The 3 Auxiliary Coolant Glow Plugs are located at the end of the aluminum cylinder head (in a protruding flange) directly below the vacuum (brake booster) pump, which also connects to a coolant hose.

tdisline_301.jpg
The 3 Auxiliary Coolant Glow Plugs use two (underhood) relays which are monitored and controlled by the ECU. During a cold start, the vehicle's interior temperature selector switch helps the ECU choose one of three modes depending on the amount of heat required to warm-up the coolant.

For example, Coolant Glow Plug #1 can be selected to operate all by itself, or #2 and #3 can operate together as a two-some, or lastly, all three glow plugs can form a triple source of heat for maximum enhancement of engine warm-up time.

After the engine is completely warmed up and the thermostat is open, the Coolant Glow Plugs normally shut-off and remain off unless the (thermally efficent) engine cools down sufficiently to have the computer signal them to come back on to keep the engine and cabin air warm. Extensive idling times at stop lights or in the driveway are scenarios where these glow plugs are most likely to recycle on and off.

In conclusion, the period of Preglow and Afterglow is determined by the engine's coolant temperature (during a cold or hot start), which helps the ECU select a predetermined time-cycle for the combustion chamber and / or Auxiliary Coolant Glow Plugs to follow.

Finally, one myth that needs to be immediately debunked, is the belief that the TDI's advanced Glow Plug System is linked to the opening of the driver's side door, which is false! It is also noteworthy to mention that some earlier VW diesel glow plug systems were operated in this manner, but not so with the advanced VW Jetta 1.9 TDI engine.

Feb 23, 2011 | Volkswagen Jetta Cars & Trucks

1 Answer

I have a 2000 Jetta diesel. Can you tell me where the plug for the block heater is? If indeed there is one.


In addition to the 4 primary glow plugs, the cooling system also has 3 Coolant Glow Plugs to help provide extra heat to the cooling system in order to warm-up the vehicle's interior more quickly, and enhance overall engine warm-up time. (Example - Some Mercedes diesel engines use electrical heaters in the cabin because their engine is so thermally efficient.)
Likewise, this auxiliary source of heat from the 3 Coolant Glow Plugs is necessary because of the VW 1.9 TDI engines outstanding efficiency, which wastes very little heat.


The 3 Auxiliary Coolant Glow Plugs are located at the end of the aluminum cylinder head (in a protruding flange) directly below the vacuum (brake booster) pump, which also connects to a coolant hose.

tdisline_180.jpg


The 3 Auxiliary Coolant Glow Plugs use two (underhood) relays which are monitored and controlled by the ECU. During a cold start, the vehicle's interior temperature selector switch helps the ECU choose one of three modes depending on the amount of heat required to warm-up the coolant.

For example, Coolant Glow Plug #1 can be selected to operate all by itself, or #2 and #3 can operate together as a two-some, or lastly, all three glow plugs can form a triple source of heat for maximum enhancement of engine warm-up time.

After the engine is completely warmed up and the thermostat is open, the Coolant Glow Plugs normally shut-off and remain off unless the (thermally efficent) engine cools down sufficiently to have the computer signal them to come back on to keep the engine and cabin air warm. Extensive idling times at stop lights or in the driveway are scenarios where these glow plugs are most likely to recycle on and off.

In conclusion, the period of Preglow and Afterglow is determined by the engine's coolant temperature (during a cold or hot start), which helps the ECU select a predetermined time-cycle for the combustion chamber and / or Auxiliary Coolant Glow Plugs to follow.

Finally, one myth that needs to be immediately debunked, is the belief that the TDI's advanced Glow Plug System is linked to the opening of the driver's side door, which is false! It is also noteworthy to mention that some earlier VW diesel glow plug systems were operated in this manner, but not so with the advanced VW Jetta 1.9 TDI engine.




Please do rate my response. Thanks!

Jan 23, 2011 | 2000 Volkswagen Jetta TDI

1 Answer

Where are the three glow plugs that are used for the heater/cooling located on an 02 vw jetta 1.9L tdi?


In addition to the 4 primary glow plugs, the cooling system also has 3 Coolant Glow Plugs to help provide extra heat to the cooling system in order to warm-up the vehicle's interior more quickly, and enhance overall engine warm-up time. (Example - Some Mercedes diesel engines use electrical heaters in the cabin because their engine is so thermally efficient.)
Likewise, this auxiliary source of heat from the 3 Coolant Glow Plugs is necessary because of the VW 1.9 TDI engines outstanding efficiency, which wastes very little heat.


The 3 Auxiliary Coolant Glow Plugs are located at the end of the aluminum cylinder head (in a protruding flange) directly below the vacuum (brake booster) pump, which also connects to a coolant hose.

tdisline_102.jpg
The 3 Auxiliary Coolant Glow Plugs use two (underhood) relays which are monitored and controlled by the ECU. During a cold start, the vehicle's interior temperature selector switch helps the ECU choose one of three modes depending on the amount of heat required to warm-up the coolant.

For example, Coolant Glow Plug #1 can be selected to operate all by itself, or #2 and #3 can operate together as a two-some, or lastly, all three glow plugs can form a triple source of heat for maximum enhancement of engine warm-up time.

After the engine is completely warmed up and the thermostat is open, the Coolant Glow Plugs normally shut-off and remain off unless the (thermally efficent) engine cools down sufficiently to have the computer signal them to come back on to keep the engine and cabin air warm. Extensive idling times at stop lights or in the driveway are scenarios where these glow plugs are most likely to recycle on and off.

In conclusion, the period of Preglow and Afterglow is determined by the engine's coolant temperature (during a cold or hot start), which helps the ECU select a predetermined time-cycle for the combustion chamber and / or Auxiliary Coolant Glow Plugs to follow.

Finally, one myth that needs to be immediately debunked, is the belief that the TDI's advanced Glow Plug System is linked to the opening of the driver's side door, which is false! It is also noteworthy to mention that some earlier VW diesel glow plug systems were operated in this manner, but not so with the advanced VW Jetta 1.9 TDI engine.

Dec 16, 2010 | 2002 Volkswagen Jetta TDI

1 Answer

I HAVE A 2001 VW JETTA TDI. THE ENGINE LIGHT STAYS ON. I HAD IT CHECKED WITH COMPUTER AND IT HAS A CIRCUIT A OF THE GLOW PLUG CODE. ANY REMEDY'S?


After about every 100Kms one or more glow plugs burn out. Think of them like toaster elements which ignite the fuel on start.
The recommended solution is to replace all 4 at once as the labor for changing one is the same as for changing all 4.
If you change just 1 (and you would have to be able to figure out which one it is - not easy) the other 3 will follow (failing) in a few weeks afterward.

Oct 06, 2010 | 2001 Volkswagen Jetta TDI

2 Answers

Need to know which is the glow plug number 3 on my jetta tdi


Look at the front of the motor and count back. The front is number 1 and so on.

Feb 22, 2010 | 2003 Volkswagen Jetta TDI

1 Answer

2001 Jetta Tdi runs rough


Hi Whitneyford
Your priblem sounds more like the glow plug timer relay than the exhaust. White smoke after start up is a sign of diesel entering the exhaust before it has burned completly. This is as a result of the glow plugs switching off too early, which is usually caused by one or more faulty glow plugs or a faulty timer.With engine COLD, IGNITION ON... Check voltage with all 4 plugs connected. You should have a reading of 10--12 volts
If there is no power, check in-line fuse on loom coming to plugs.
If power is present, check for How Long. If only for a few seconds, the problem is with the timer. This unit (the larger of the relays and usually black in colour) is fitted on the fuse board, and there are a few different types. They come in 7 pin..8 pin..and even 9 pin units.
The glow plug light is often NOT accurate (even with a new timer unit fitted) as to the time of heating, and you will almost certainly find that power will flow to the plugs for quiet some time after the light goes out. This is not unusuall with The Jetta Tdi.
Good luck.
I hope this helps you sort out this problem
John

Aug 18, 2009 | 2001 Volkswagen Jetta TDI

1 Answer

2002 Jetta TDI check engine light


very common for the harness that plugs onto the glow plugs to have too much resistance it will still work but will set codes

Mar 23, 2009 | 2002 Volkswagen Jetta TDI

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