redrick
Jun 7, 2010, 04:27 PM
How do I test a mass air flow sensor on a 1992 4 cylinder toyota pickup 22re engine
CaptainRich
Jun 8, 2010, 06:46 PM
This Mass Air Flow Sensor (MAF) very accurately estimates mass air volume by way of a moving gate inside the housing.
Toyota calls it the measuring plate.
Here's the Key to which circuit is which:
Pin 1 FC is Green w/ Yellow trace
Pin 2 E is Brown
Pin 3 E2 is Brown w/ Black trace
Pin 4 VB is White w/ Red trace
Pin 5 VC is Green w/ Black trace
Pin 6 VS is Yellow w/ Blue trace
Pin 7 THA is Yellow w/ Green trace
31323
If the following aren't correct, replace the MAF:
31321
If that checks out OK, remove the MAF and measure this:
31322
If the MAF acting up, you may or may not have fault codes but you probably need a replacement.