It looks like Toyota fitted two different kinds of MAF sensors on our trucks. 22250-20020 was fitted till 06/1999 and 22204-21010 was fitted after that. I have the former one installed on my 1998 truck.
Now I have a reason to think that my MAF is going bad so I want to test it. I found a bunch of manuals describing how to do do resistance testing on the air temperature sensor (incorporated in the MAF) and voltage testing on the MAF sensor itself. It seems, however, 22250-20020 and 22204-21010 have different pinouts. That makes me think they might have different readings on some tests, too.
I am currently doing tests by this manual - http://www.autozone.com/autozone/re...tems/Mass-Air-Flow-Meter/_/P-0996b43f802c5570 . However, I am really not sure that this is the correct reference. So, can some of you, guys, try measuring this on your pre 06/1999 trucks and see whether it falls within range as per this manual?
P.S. Why is 22250-20020 so much more expensive than 22204-21010....I really cannot see the reason for this.
Now I have a reason to think that my MAF is going bad so I want to test it. I found a bunch of manuals describing how to do do resistance testing on the air temperature sensor (incorporated in the MAF) and voltage testing on the MAF sensor itself. It seems, however, 22250-20020 and 22204-21010 have different pinouts. That makes me think they might have different readings on some tests, too.
I am currently doing tests by this manual - http://www.autozone.com/autozone/re...tems/Mass-Air-Flow-Meter/_/P-0996b43f802c5570 . However, I am really not sure that this is the correct reference. So, can some of you, guys, try measuring this on your pre 06/1999 trucks and see whether it falls within range as per this manual?
P.S. Why is 22250-20020 so much more expensive than 22204-21010....I really cannot see the reason for this.