Pinpoint Test DN: Pressure And Temperature Sensors: Introduction

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This pinpoint test is intended to diagnose the following:

intake air temperature 2 (IAT2) sensor (12A697)
manifold absolute pressure (MAP)/charge air cooler temperature (CACT) sensor (9F479)
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 SENSOR VOLTAGE AND RESISTANCE SPECIFICATIONS

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.

Harness Side

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

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

Courtesy of FORD MOTOR CO.

Harness Side

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

Fig 3: Powertrain Control Module (PCM) Connector - For PCM Connector Views

Courtesy of FORD MOTOR CO.

Harness Side

Circuit	Pin
IAT2 (Intake Air Temperature 2)	E52
SIGRTN (Signal Return)	E41