Pinpoint Test DA: Intake Air Temperature (IAT) Sensor: Introduction

WARNING: This page does not describe the selected car, but rather 31 other vehicles, including the 2015 Lincoln Navigator, 2015 Lincoln MKZ, 2015 Lincoln MKX, 2015 Lincoln MKT, and 2015 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)
manifold absolute pressure and temperature (MAPT) sensor (9F479)
turbocharger inlet pressure and temperature (TCIPT) sensor (9F479)
harness circuits: IAT and SIGRTN
PCM (12A650)

Fig 1: Intake Air Temperature (IAT) Sensor Voltage Graph
Courtesy of FORD MOTOR CO.

Fig 2: Identifying Intake Air Temperature (IAT) Sensor Connector
Courtesy of FORD MOTOR CO.

Vehicle	Connector	Pin	Circuit
E-Series 5.4L, MKX	A	2 1	SIGRTN IAT
Edge 2.0L, Focus 1.0L, Fusion 2.0L	B	1 2	SIGRTN IAT
Edge 2.7L, Escape/Kuga 1.6L, Expedition, Explorer GTDI 3.5L, F-150, Flex GTDI 3.5L, Focus GTDI 2.0L, Fusion 1.5L, MKC, MKS 3.5L, MKT 3.5L, Mustang 2.3L, Navigator, Taurus GTDI 3.5L, Transit Connect 1.6L	B	2 1	SIGRTN IAT
Escape/Kuga 2.0L, Fusion 1.6L	C	1 2	SIGRTN IAT
MKZ 2.0L	C	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 (MAPT) Sensor Connector

Courtesy of FORD MOTOR CO.

Vehicle	Connector	Pin	Circuit
Edge 3.5L, F-150 3.5L, Mustang	A	4 3	SIGRTN IAT
All other vehicles	B	1 2	SIGRTN IAT

Fig 4: Identifying Turbocharger Intake Pressure And Temperature (TCIPT) Sensor Connector

Courtesy of FORD MOTOR CO.

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

Powertrain Control Module (PCM) Connector

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

Vehicle	Connector	Pin	Circuit
E-Series 6.8L, F-650/F-750, F-Series Super Duty	190-PIN	B2 B47	SIGRTN IAT
E-Series 5.4L	190-PIN	B58 B47	SIGRTN IAT
Edge 3.5L, F-150 TiVCT 3.5L, F-150 5.0L, Mustang 3.7L	198 PIN	E29 E27	SIGRTN IAT
Escape/Kuga 1.6L, Escape/Kuga 2.0L, Focus 1.0L, Focus GTDI 2.0L, Fusion 2.0L, Fusion 1.6L, Fusion 1.5L, MKC, MKZ 2.0L, Mustang 2.3L, Transit Connect 1.6L	198 PIN	B19 B75	SIGRTN IAT
Escape/Kuga 2.5L, Explorer 3.7L, Explorer TiVCT 3.5L, Flex TiVCT 3.5L, MKS 3.7L, MKT 3.7L, MKX, MKZ 3.7L, Taurus TiVCT 3.5L, Taurus 3.7L, Transit 3.7L, Transit Connect 2.5L	190-PIN	B41 B47	SIGRTN IAT
Explorer 2.0L	154 PIN	E36 E10	SIGRTN IAT
Fiesta GTDI 1.6L, Fiesta 1.0L	198 PIN	B9 B75	SIGRTN IAT
Fiesta TiVCT 1.6L	128 PIN	B38 E17	SIGRTN IAT
Focus GDI 2.0L	198 PIN	E36 E10	SIGRTN IAT
Fusion 2.5L	190-PIN	B41 B75	SIGRTN IAT
Motorhome/Stripped Chassis/Step Van	190-PIN	B47	IAT
Mustang 5.0L	198 PIN	B54 E27	SIGRTN IAT
All other vehicles	198 PIN	B18 B75	SIGRTN IAT