Pinpoint Tests F: Intake Air Temperature (IAT) Sensor: Introduction

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:

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

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

Courtesy of FORD MOTOR CO.

Vehicle	Connector	Pin	Circuit
F-650/F-750, F-150, F-Series Super Duty	A	3	SIGRTN
Transit Connect	B	4 2	SIGRTN IAT

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

Courtesy of FORD MOTOR CO.

Vehicle	Connector	Pin	Circuit
Transit Connect	A	4 17	SIGRTN IAT
All other vehicles	B	11	SIGRTN