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 2022 Ford F-550 Super Duty, 2022 Ford F-450 Super Duty, 2022 Ford F-350 Super Duty, 2022 Ford F-250 Super Duty, and 2021 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.

Pin	Circuit
2	SIGRTN (Signal Return)
1	AAT (Ambient Air Temperature)

Fig 2: Right Exterior Rear View Mirror Assembly Connector

Courtesy of FORD MOTOR CO.

Vehicle	Connector	Pin	Circuit
F-150 Without Power Mirrors, F-Series Super Duty Without Power Mirrors	A	3 1	SIGRTN AAT
F-150 With Power Mirrors, F-Series Super Duty With Power Mirrors	B	2 6	SIGRTN AAT

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

Courtesy of FORD MOTOR CO.

Vehicle	Connector	Pin	Circuit
Transit Connect	A	31 12	SIGRTN AAT
All other vehicles	B	85 86	SIGRTN AAT