www.tdiclub.com

Economy - Longevity - Performance
The #1 Source of TDI Information on the Web!
Forums Articles Links Meets
Orders TDI Club Cards TDIFest 2016 Gone, but not forgotten VAG-Com List Unit Conversions TDIClub Chat Thank You




Go Back   TDIClub Forums > TDI Model Specific Discussions Areas > VW MKIV-A4 TDIs (VE and PD)

VW MKIV-A4 TDIs (VE and PD) This is a general discussion about A4/MkIV Jetta (99.5-~2005), Golf(99.5-2006), and New Beetle(98-2006). Both VE and PD engines are covered here.

Reply
 
Thread Tools
Old July 11th, 2018, 12:53   #1
sizzlin bacon
Member
 
Join Date: Feb 2014
Location: Washington
Fuel Economy: To be determined...
Default Airbag Light and Temp Sensor Issue

I have a 2003 ALH TDI Jetta Wagon and...

...I recently replaced my clock spring following the guide here on the forum. Now that it has been replaced, the airbag light still is on the dash and the replacing of the clock spring did not fix the lack of cruise control AND there is no horn still.

My other issue is intermittently, I would have the temp sensor light (red thermometer) pop on every now and then and it will make a really high pitched beeping. I JUST redid the coolant when I had it all apart (redid the flange below the vacuum pump). Is this a thermostat issue, a temp sensor issue (on the backside of the coolant flange below the vacuum pump) or something else?

What would be the recommendation on how to address the lack of a horn, cruise control, the airbag light, and the temp sensor light? I'm getting close to burning the car down and buying a gasser...

Thank you!
sizzlin bacon is offline   Reply With Quote
Old July 11th, 2018, 15:07   #2
Seatman
Veteran Member
 
Seatman's Avatar
 
Join Date: Apr 2010
Location: Scotland
Fuel Economy: No idea
Default

Regarding the temp thing, I think it can be the sensor in the tank thinking the level is low. If it's temp related I often hook up vagcom and compare what the ecu says to what the gauge reads. It's like two sensors in one and half can be faulty.

Did you check the continuity of the clock spring and horn parts in the steering wheel?

I recently had an air bag issue on mine, checked the clock spring and it was fine so cleaned the contacts and it's cured it. The pins are very small so don't think it would take much to cause a bad connection.
Seatman is offline   Reply With Quote
Old July 11th, 2018, 15:38   #3
ktmkris
Veteran Member
 
Join Date: Apr 2013
Location: monroe nc
Default

My fathers beetle throws a airbag light every time he drives through a rain storm. You may want to delete it and see if and when it comes back on
ktmkris is offline   Reply With Quote
Old July 26th, 2018, 09:34   #4
sizzlin bacon
Member
 
Join Date: Feb 2014
Location: Washington
Fuel Economy: To be determined...
Default

I guess to come back to this, I haven't messed with it in a while as I have been busy on my farm. If the horn isn't functional, should I pop it all apart and try again? I REALLY want to drive this car as my Jeep Cherokee is pulling in 17mpg AT BEST...

I talked to a guy at a VW dealership/service center and he stated I may have to have it hooked up to the VAG Scanner to see what is causing the light to come on. He said it scans the different sensors instead of having to check each one manually. Does this sound about right? I know the little pins aren't always easy to slide into the mount. I may check for properly seated pins.

As for the thermostat/temp issue, if the sensor thinks the tank is low...what sensor do I replace?
sizzlin bacon is offline   Reply With Quote
Old July 26th, 2018, 09:43   #5
jbourke367
Member
 
Join Date: Aug 2014
Location: South Shore, MA
Default

Quote:
Originally Posted by sizzlin bacon View Post
I have a 2003 ALH TDI Jetta Wagon and...
...I recently replaced my clock spring following the guide here on the forum. Now that it has been replaced, the airbag light still is on the dash and the replacing of the clock spring did not fix the lack of cruise control AND there is no horn still.
My other issue is intermittently, I would have the temp sensor light (red thermometer) pop on every now and then and it will make a really high pitched beeping. I JUST redid the coolant when I had it all apart (redid the flange below the vacuum pump). Is this a thermostat issue, a temp sensor issue (on the backside of the coolant flange below the vacuum pump) or something else?
What would be the recommendation on how to address the lack of a horn, cruise control, the airbag light, and the temp sensor light? I'm getting close to burning the car down and buying a gasser...
Thank you!
I am fairly certain you need VCDS to clear the DTC associated with the airbag system.
How does the coolant level in the reservoir look? I had this problem when I drained the coolant. It was a real PITA to get the air purged out of the system. I had to drive the car down the street until the light came on, then stop and refill the reservoir, repeating the process until the air was gone and the fill level was accurate.If the coolant level is right at the threshold, this will cause the light to turn on intermittently. This is obviously driven by the driving conditions (driving up a hill).
jbourke367 is offline   Reply With Quote
Old July 26th, 2018, 18:02   #6
wonneber
Veteran Member
 
Join Date: Oct 2011
Location: Monroe, NY, USA
Default

VCDS will scan everything in the car.
I have the Lite version registered. Not registered is free but you need the OBD adapter that works with it.
Registering it adds the graph function for setting the timing when you change the timing belt.

If you have the Bentley manual you could follow the wire diagrams to check for continuity. I would do this before you start throwing money into a guess the next part game.

When the temp beep starts is the gauge indicating it's higher then normal?
If not it -could- be the sensor pins inside the reserve bottle.
I scraped mine a couple times before it stopped going on.
Also found if I shot the motor and started it again a few seconds later it did not go on again for the trip.

VCDS would show both sides of the coolant temp sensor. One side for the ECU, the other for the gauge.
wonneber is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Glow plugs/coolant temp sensor issue TripXAnarchy99 TDI 101 17 November 15th, 2017 04:20
Temp. sensor issue MeOmYo TDI 101 1 March 24th, 2010 06:30
Temp Sensor Issue newswami VW MKIV-A4 TDIs (VE and PD) 6 January 18th, 2010 18:28
possible temp sensor issue? bonjourblink182 TDI 101 4 March 18th, 2009 17:58
Airbag sensor light BWakefield VW MKIV-A4 TDIs (VE and PD) 4 October 18th, 2004 08:37


All times are GMT -7. The time now is 01:14.


Powered by vBulletin® Version 3.8.5
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
Copyright - TDIClub Online LTD - 2017
Contact Us | Privacy Statement | Forum Rules | Disclaimer
TDIClub Online Ltd (TDIClub.com) is not affiliated with the VWoA or VWAG and is supported by contributions from viewers like you.
1996 - 2017, All Rights Reserved
Page generated in 0.13859 seconds with 12 queries
[Output: 76.13 Kb. compressed to 67.26 Kb. by saving 8.88 Kb. (11.66%)]