2002 Jetta MKIV temp/fuel non responsive.

oxydrum@gmail.com

New member
Joined
Aug 6, 2019
Location
Ventura
TDI
2002 VW Jetta 1.9L TDI
Hello.

Been the best car I have ever had. Can’t get the temp sensor or the fuel gage to do anything. Checked fuses, replaced coolant temp sensor, pulled the fuel level/filter and replaced. No luck.

Wiring?

Anyone heard of this? Can’t pass smog in Southern California without having it run a drive cycle.

Runs like a champ, of course-

Any insight greatly appreciated-
 

STDOUBT

Veteran Member
Joined
Jul 30, 2007
Location
Portland, effing Oregon
TDI
ALHx2
What's a drive cycle?
Does everything else in your instrument cluster work properly?
All indicator lights come on when you key ON?
Has the car ever had water leaking into the cabin?
Any recent work done?
Your answers might help someone else more efficiently diagnose your issue! You also might consider that your car wants to move to Texas :cool:
 

eddieleephd

Top Post Dawg
Joined
May 27, 2012
Location
Asheville, NC
TDI
2002 jetta Wagon
Last edited:

oilhammer

Certified Volkswagen Nut & Vendor
Joined
Dec 11, 2001
Location
outside St Louis (where it's safe)
TDI
There are just too many to list....
OBD works, should've started there. The Instruments communicate through the DLC, same as the rest of the modules on the CAN bus. You can see if it has any DTCs, and see if it is reading the correct values from the sensors (you can even do an output test to make the gauges sweep). I suspect the problem could be a bad solder joint, possibly on a shared voltage stabilizer, inside the cluster.
 

Powder Hound

Top Post Dawg
Joined
Oct 25, 1999
Location
Under a Bridge, New Hampshiyuh, USA
TDI
'00 Golf 4dr White 5sp, '02 Jettachero 5sp, Wife's '03 NB Platinum Gray auto(!)
Once in a while the resistor sweep in the fuel sender/pickup in the tank needs to be wiped off. That wouldn't explain the coolant temp though. I'd go with OH's advice first.

Cheers,

PH
 
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