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

WARNING: This page does not describe the selected car, but rather 22 other vehicles, including the 2011 Mercury Milan, 2011 Mercury Mariner, 2011 Mercury Grand Marquis, 2011 Lincoln Town Car, and 2011 Lincoln Navigator L. 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 air flow/intake air temperature (MAF/IAT) sensor (12B579)
harness circuits: IAT and SIGRTN
powertrain control module (PCM) (12A650)

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

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

Powertrain Control Module (PCM) Connector

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

POWERTRAIN CONTROL MODULE CONNECTOR PINS REFERENCE CHART

Vehicle	Connector	Pin	Circuit
Crown Victoria, E-Series 6.8L, Grand Marquis, Ranger, Town Car	170 PIN	E26 E22	MAF RTN IAT
F-150 6.2L, F-150 5.0L	190-PIN	B2 B47	MAF RTN IAT
F-150 3.5L	198 PIN	B9 B75	SIGRTN IAT
F-Series Super Duty, Mustang 5.4L, Mustang 5.0L	190-PIN	B2 B47	SIGRTN IAT
Fiesta	128 PIN	E1 E26	MAF RTN IAT
Flex 4V 3.5L, MKS 3.7L, MKT 3.7L, Taurus 4V 3.5L	190-PIN	B42 B43	MAF RTN IAT
Flex GTDI 3.5L, MKS 3.5L, MKT 3.5L, Taurus GTDI 3.5L	190-PIN	B47	IAT
Fusion 3.5L, MKZ	140 PIN	B42 B43	MAF RTN IAT
Mustang 3.7L	190-PIN	B41 B47	SIGRTN IAT
All other vehicles	190-PIN	B41 B47	MAF RTN IAT