PINPOINT TEST FA: Ambient Air Temperature (AAT) Sensor: Introduction

This pinpoint test is intended to diagnose the following:

AAT sensor
harness circuits: AAT and SIGRTN
powertrain control module (PCM) (12A650)

Fig 1: Identifying Ambient Air Temperature Sensor Connector Terminals
Courtesy of FORD MOTOR CO.

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

Fig 2: Identifying Right Exterior Rear View Mirror Assembly Connector Terminals

Courtesy of FORD MOTOR CO.

Pin	Circuit
10	SIGRTN (Signal Return)
9	AAT (Ambient Air Temperature)

Fig 3: Identifying Instrument Panel Cluster Connector Terminals

Courtesy of FORD MOTOR CO.

Pin	Circuit
19	SIGRTN (Signal Return)
20	AAT (Ambient Air Temperature)

Powertrain Control Module (PCM) Connector

For PCM connector views or reference values, refer to SECTION 6: REFERENCE VALUES .

Vehicle	Connector	Pin	Circuit
Edge 2.0L, Explorer 2.0L	154 PIN	B21 B35	SIGRTN AAT
Edge 3.5L, Edge 3.7L, MKX	190-PIN	B56 E29	SIGRTN AAT
Escape 1.6L, Escape 2.0L, Explorer GTDI 3.5L, Flex GTDI 3.5L, Fusion 1.5L, Fusion 2.0L, MKS 3.5L, MKT 2.0L, MKT 3.5L, MKZ 2.0L, Taurus 2.0L, Taurus GTDI 3.5L, Transit Connect 1.6L	198 PIN	B18 B51	SIGRTN AAT
F-150 3.5L	198 PIN	B34 B51	SIGRTN AAT
Focus	154 PIN	B34 B35	SIGRTN AAT
Fusion 1.6L	198 PIN	E17, E34 B51	SIGRTN AAT
Motorhome/Stripped Chassis/Step Van	190-PIN	B56	SIGRTN
All other vehicles	190-PIN	B56 B17	SIGRTN AAT