Pinpoint Tests Fa: Ambient Air Temperature (AAT) 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.

This pinpoint test is intended to diagnose the following:

AAT sensor (12A647)
harness circuits: AAT and SIGRTN
PCM (12A650)

Fig 1: Ambient Air Temperature (AAT) Sensor Connector

Courtesy of FORD MOTOR CO.

Vehicle	Connector	Pin	Circuit
F-Series Super Duty	A	2 1	SIGRTN AAT
Transit	B	2 1	SIGRTN AAT
All other vehicles	C	2 1	SIGRTN AAT

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

Courtesy of FORD MOTOR CO.

Vehicle	Connector	Pin	Circuit
F-650/F-750	A	3	AAT
All other vehicles	A	44 3	SIGRTN AAT

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

Courtesy of FORD MOTOR CO.

Vehicle	Connector	Pin	Circuit
F-650/F-750	A	43	SIGRTN
Transit	B	21 18	AAT SIGRTN