Pinpoint Tests DN: Pressure And Temperature Sensors: Introduction

WARNING: This page does not describe the selected car, but rather 27 other vehicles, including the 2021 Lincoln Navigator, 2021 Lincoln Nautilus, 2021 Lincoln Corsair, 2021 Lincoln Aviator, and 2021 Ford Transit-350 HD. However, it is still accessible from the selected car via links, so may be relevant.

This pinpoint test is intended to diagnose the following:

intake air temperature 2 (IAT2) sensor (12A697)
manifold absolute pressure (MAP)/intake air temperature 2 (IAT2) sensor (9F479)
turbocharger boost pressure (TCBP)/charge air cooler temperature (CACT) sensor (9F479)
harness circuits: IAT2, CACT, SIGRTN and VREF
PCM (12A650)

Voltage values calculated for VREF equals 5 volts. These values can vary by 15% due to sensor and VREF variations.

Courtesy of FORD MOTOR CO.

Temperature		Temperature Sensor Values
°C	°F	Resistance (K ohms)
120	248	1.18
110	230	1.55
100	212	2.07
90	194	2.80
80	176	3.84
70	158	5.37

60	140	7.70
50	122	10.97
40	104	16.15
30	86	24.27
20	68	37.30
10	50	58.75
0	32	95.85
-10	14	160.31

Fig 1: Intake Air Temperature 2 (IAT2) Sensor Connector

Courtesy of FORD MOTOR CO.

Pin	Circuit
2	SIGRTN (Signal Return)
1	IAT2 (Intake Air Temperature 2)

Fig 2: Manifold Absolute Pressure/Intake Air Temperature 2 (MAP/IAT2) Sensor Connector

Courtesy of FORD MOTOR CO.

Vehicle	Connector	Pin	Circuit
Aviator, Explorer 3.0L	A	4 1	SIGRTN IAT2
Bronco Sport, F-150	B	4 3	SIGRTN IAT2
Continental,	C	1	SIGRTN
EcoSport, Mustang 2.3L		2	IAT2
Edge 2.7L, Nautilus 2.7L, Transit	D	4 1	SIGRTN IAT2
Edge 2.0L, Expedition Base, Nautilus 2.0L	C	4 3	SIGRTN IAT2
Expedition High Output, Navigator	C	4 1	SIGRTN IAT2
Mustang 5.2L	A	3 1	SIGRTN IAT2
All other vehicles	A	4 3	SIGRTN IAT2

Fig 3: Turbocharger Boost Pressure/Charge Air Cooler Temperature (TCBP/CACT) Sensor Connector

Courtesy of FORD MOTOR CO.

Vehicle	Connector	Pin	Circuit
Aviator, Explorer	A	4 3	SIGRTN CACT
F-150	B	2 1	SIGRTN CACT
All other vehicles	C	4 3	SIGRTN CACT

Powertrain Control Module (PCM) Connector

For PCM connector views or reference values, refer to Reference Values.

Vehicle	Connector	Pin	Circuit
Aviator, Explorer 3.0L	306 PIN	B26 E13	SIGRTN SIGRTN
		E50	IAT2
Continental	198 PIN	E20 E34	SIGRTN IAT2
EcoSport 1.0L Automatic Transmission	198 PIN	E20 B75	SIGRTN IAT2
EcoSport 1.0L Manual Transmission	198 PIN	E19 B32	SIGRTN IAT2
Edge 2.7L	306 PIN	B26 B83 E13 E50	SIGRTN CACT SIGRTN IAT2
Expedition High Output, Navigator High Output	198 PIN	B30 B35 E10 E52	SIGRTN CACT SIGRTN IAT2
Expedition Base, Navigator Base	306 PIN	E112 E10 E13 E52	SIGRTN CACT SIGRTN IAT2
F-150	306 PIN	B21 B5 E89 E72	SIGRTN CACT SIGRTN IAT2
Ford GT	198 PIN	E20 B53	SIGRTN CACT
		E20 E34	SIGRTN IAT2
Mustang 5.2L	306 PIN	E28 E94	SIGRTN IAT2
Nautilus 2.0L	198 PIN	E20 E25	SIGRTN IAT2
Nautilus 2.7L	306 PIN	B18 B83 E20 E50	SIGRTN CACT SIGRTN IAT2
Transit	306 PIN	B26 B10 E13 E50	SIGRTN CACT SIGRTN IAT2
Transit Connect 1.0L	198 PIN	E41 E53	SIGRTN IAT2
All other vehicles	198 PIN	E41 E52	SIGRTN IAT2