PINPOINT TEST DA: Intake Air Temperature (IAT) Sensor: Introduction: Notes

WARNING: This page does not describe the selected car, but rather 28 other vehicles, including the 2014 Lincoln Navigator, 2014 Lincoln MKZ, 2014 Lincoln MKX, 2014 Lincoln MKT, and 2014 Lincoln MKS. However, it is still accessible from the selected car via links, so may be relevant.

This pinpoint test is intended to diagnose the following:

IAT sensor (12A697)
integrated mass airflow/intake air temperature (MAF/IAT) sensor (12B579)
harness circuits: IAT and SIGRTN
powertrain control module (PCM) (12A650)

Fig 1: Intake Air Temperature Sensor Temperature Versus Voltage Graph
Courtesy of FORD MOTOR CO.

Fig 2: Identifying Intake Air Temperature Sensor Connector Terminals
Courtesy of FORD MOTOR CO.

Vehicle	Connector	Pin	Circuit
E-Series 5.4L, E-Series 4.6L, Edge 3.5L, Edge 3.7L, MKX	A	2 1	SIGRTN IAT
Escape 1.6L, Escape 2.0L, Focus GTDI 2.0L, Fusion 1.6L	B	1 2	SIGRTN IAT
Explorer GTDI 3.5L, Flex GTDI 3.5L, Fusion 1.5L, MKS 3.5L, MKT 3.5L, Taurus GTDI 3.5L, Transit Connect 1.6L	C	2 1	SIGRTN IAT
Fusion 2.0L	C	1 2	SIGRTN IAT
MKZ 2.0L	B	2 1	SIGRTN IAT
Motorhome/Stripped Chassis/Step Van	A	4 2	GND IAT
All other vehicles	A	4 2	SIGRTN IAT

Fig 3: Identifying Manifold Absolute Pressure Temperature Sensor Connector Terminals

Courtesy of FORD MOTOR CO.

Pin	Circuit
1	SIGRTN (Signal Return)
2	IAT (Intake Air Temperature)