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

This pinpoint test is intended to diagnose the following:

• mass air flow (MAF) sensor (12B579)
• harness circuits: MAF SIG, MAF RTN, vehicle power (VPWR), power ground (PWRGND), IAT and SIGRTN
• powertrain control module (PCM) (12A650)

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

Courtesy of FORD MOTOR CO.

For PCM connector views or reference values, refer to REFERENCE VALUES .