Pinpoint Tests J: Mass Airflow (MAF) Sensor: Introduction

WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2018 Ford Transit-350 HD, 2018 Ford Transit-350, 2018 Ford Transit-250, 2018 Ford Transit-150, and 2018 Ford F-550 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Regeneration may occur during normal operation. During regeneration, diagnostic procedures may display biased values. If a regeneration occurs during diagnostic procedures, allow the process to complete before continuing diagnostics.

This pinpoint test is intended to diagnose the following:

mass air flow/intake air temperature (MAF/IAT) sensor (12B579)
harness circuits: MAF, SIGRTN, and VPWR
PCM (12A650)

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

Courtesy of FORD MOTOR CO.

Pin	Circuit
4	SIGRTN (Signal Return)
5	MAF (Mass Airflow)
3	VPWR (Vehicle Power)

Fig 2: Powertrain Control Module-B (PCM-B) Connector

Courtesy of FORD MOTOR CO.

Pin	Circuit
60	SIGRTN (Signal Return)
40	MAF (Mass Airflow)

Fig 3: Powertrain Control Module-T (PCM-T) Connector

Courtesy of FORD MOTOR CO.

Pin	Circuit
15	SIGRTN (Signal Return)
24	MAF (Mass Airflow)