1995 Jetta Heated MAF Test Procedure

- J
- JRE
  
  Contact options for registered users
posted
17 years ago

Mon, Jan 29, 2007 2:21 AM

We have Haynes and Chilton manuals for a 1995 Jetta 4-cyl, but not the factory manual or a Bentley (if they do VWs). The books we have don't tell us how to test the heated MAF, but instead have useless test procedures for the vane-sytle and piston airflow sensors.

Can some kind sould tell me how to test this part before we shell out for a new one on spec? We have a 2113 MIL and know that the distributor Hall sensor is good. (We had a spare distributor, as it happens.) Also, if there's some other cause for a 2113 than these two parts, it would be good to know what else to check.

Thanks,

JRE

- L
- Lost In Space/Woodchuck
  
  Contact options for registered users
Vote on answer
posted
17 years ago

Mon, Jan 29, 2007 3:10 AM

what does it say 2113 fault is?

- P
- pfjw
  
  Contact options for registered users
Vote on answer
posted
17 years ago

Mon, Jan 29, 2007 12:36 PM

Back in the day when I last tested these things (80s cars), the test was to determine continuity across the pins for the platinum wire, as that is the most common failure... the wire breaks. If you can find those pins, you should get relatively low resistance (a few ohms) across them assuming the wire is good. Or infinite resistance if the wire is bad.

Which pins are they? Haven't a clue. Somebody here who knows which might be able to point them out to you.

On the other hand, if no combination of two pins gives you very low resistance (with the part out of the vehicle to avoid false readings to ground), then you have a pretty good idea that something is bad. and if you go to the dealer/parts-supply and do the same test before you shell out the $$ and DO get two pins with low resistance... now you have your answer.

The above is not to say that in the last 20 years the technology has not changed such that the above test is useless. So DO NOT work from a single data-point, but only if a known-good part tests differently from your part.

Peter Wieck Wyncote, PA