PINPOINT TEST J: Mass Air Flow (MAF) Sensor: Introduction

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2007 Ford RV Cutaway, 2007 Ford Pickup, 2007 Ford F550 Super Duty, 2007 Ford F450 Super Duty, and 2007 Ford Econoline. However, it is still accessible from the selected car via links, so may be relevant.

This pinpoint test is intended to diagnose the following:

MAF sensor
harness circuits: MAF SIG, MAF RTN, vehicle power (VPWR), and power ground (PWRGND)
Powertrain control module (PCM) (12A650)

Fig 1: Mass Air Flow/Intake Air Temperature (MAF/IAT) Sensor Connector - A

Courtesy of FORD MOTOR CO.

Fig 2: Mass Air Flow/Intake Air Temperature (MAF/IAT) Sensor Connector - B

Courtesy of FORD MOTOR CO.

Vehicle	Connector	Pin	Circuit
E-Series	A	3 4 5 6	MAF MAF RTN PWRGND VPWR
F-Super Duty vehicles with an integrated MAF/IAT sensor	B	5 4 3 2	MAF MAF RTN PWRGND VPWR

Fig 3: Powertrain Control Module Connector Terminals

Pin	Circuit
B21	MAF RTN (Mass Air Flow Return)
B42	MAF (Mass Air Flow)