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Home >> Ford >> 2005 >> Freestyle SEL, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1530 (Engine Controls - Pinpoint Test A: No Start Through Pinpoint Test DJ: Air Conditioning Evaporator Temperature (ACET) Sensor - (Except Diesel & Hybrid)) >> PINPOINT TEST DA: Intake Air Temperature (IAT) Sensor >> Introduction

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

WARNING: This page does not describe the selected car, but rather 35 other vehicles, including the 2007 Mercury Mountaineer, 2007 Mercury Monterey, 2007 Mercury Montego, 2007 Mercury Milan, and 2007 Mercury Mariner. However, it is still accessible from the selected car via links, so may be relevant.

This pinpoint test is intended to diagnose the following:

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

Fig 1: Intake Air Temperature (IAT) Sensor Temperature To Voltage Graph
GF0001487
TEMPERATURE SENSOR VOLTAGE AND RESISTANCE SPECIFICATIONS

Temperature Temperature Sensor Values
°C °F Voltage Resistance (K ohms)
120 248 0.28 1.18
110 230 0.36 1.55
100 212 0.47 2.07
90 194 0.61 2.80
80 176 0.80 3.84
70 158 1.05 5.37
60 140 1.37 7.70
50 122 1.77 10.97
40 104 2.23 16.15
30 86 2.74 24.27
20 68 3.26 37.30
10 50 3.73 58.75
0 32 4.14 95.85
-10 14 4.45 160.31
Fig 2: Mass Air Flow/Intake Air Temperature (MAF/IAT) Sensor Connector - A
GF0001488Courtesy of FORD MOTOR CO.
Fig 3: Mass Air Flow/Intake Air Temperature (MAF/IAT) Sensor Connector - B
GF0001541Courtesy of FORD MOTOR CO.
Vehicle Connector Pin Circuit
Escape 3.0L,
Mariner 3.0L		 A 4
1
6		 MAF RTN
SIGRTN
IAT
All other vehicles B 4
2
1		 MAF RTN
SIGRTN
IAT

Powertrain Control Module (PCM) Connector 

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

Vehicle Connector Pin Circuit
Crown Victoria,
Grand Marquis,
Town Car		 170 Pin T41
E22		 SIGRTN
IAT
Edge,
F-150,
Mark LT,
MKX		 190 Pin E58
E22		 SIGRTN
IAT
Escape,
Focus,
Mariner		 150 (50-50-50) Pin B41
B20		 SIGRTN
IAT
Expedition,
Fusion,
Milan,
MKZ,
Navigator		 140 Pin B58
B43		 SIGRTN
IAT
Five Hundred,
Freestyle,
Montego		 150 (50-50-50) Pin B41
E16		 SIGRTN
IAT
Freestar/Monterey,
Taurus		 104 Pin 91
39		 SIGRTN
IAT
All other vehicles 170 Pin E58
E22		 SIGRTN
IAT
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