Pinpoint Test J: Mass Air Flow (MAF) Sensor: Introduction

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

Courtesy of FORD MOTOR CO.

Fig 2: Powertrain Control Module (PCM) Connector

Courtesy of FORD MOTOR CO.