Pinpoint Tests FA: Ambient Air Temperature (AAT) Sensor: Introduction

This pinpoint test is intended to diagnose the following:

• AAT sensor (12A647)
• harness circuits: AAT and SIGRTN
• PCM (12A650)
  Fig 1: Identifying Ambient Air Temperature (AAT) Sensor Connector

  Courtesy of FORD MOTOR CO.

  Vehicle	Connector	Pin	Circuit
  Transit	A	2 1	SIGRTN AAT
  All other vehicles	B	2 1	SIGRTN AAT

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

  Courtesy of FORD MOTOR CO.

  Vehicle	Connector	Pin	Circuit
  F-Series Super Duty	A	44 3	SIGRTN AAT
  F-650/F-750	A	3	AAT

  Fig 3: Identifying 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