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

This pinpoint test is intended to diagnose the following:

Fig 1: Intake Air Temperature Sensor Voltage Graph
G11848400Courtesy of FORD MOTOR CO.
Fig 2: Intake Air Temperature (IAT) Sensor Connector
G11848401Courtesy of FORD MOTOR CO.
Vehicle Connector Pin Circuit
E-Series,
Escape/Kuga 2.5L,
Explorer TiVCT 3.5L,
Explorer 3.7L,
F-650/F-750,
F-Series Super Duty,
Fiesta,
Focus GDI 2.0L,
Ford GT,
Fusion 2.5L,
Mustang 5.0L,
Mustang 5.2L,
Transit,
Transit Connect
A 4
2
SIGRTN
IAT
Focus 1.0L B 1
2
SIGRTN
IAT
KA C 1
2
SIGRTN
IAT
Motorhome/Stripped Chassis/Step Van A 4
2
GND
IAT
Mustang 3.7L D 4
3
SIGRTN
IAT
All other vehicles B 2
1
SIGRTN
IAT
Fig 3: Mass Air Flow Bank 2, Sensor 1/Intake Air Temperature Bank 2 And Sensor 1 (MAF21/IAT21) Sensor Connector
G11848402Courtesy of FORD MOTOR CO.
Pin Circuit
4 SIGRTN (Signal Return)
2 IAT21 (Intake Air Temperature Bank 2, Sensor 1)
Fig 4: Manifold Absolute Pressure Temperature (MAPT) Sensor Connector
G11848403Courtesy of FORD MOTOR CO.
Vehicle Connector Pin Circuit
Continental,
Edge 3.5L,
Explorer 3.5L,
Explorer 3.7L,
F-150 3.5L,
Flex 3.5L,
MKT 3.7L,
Mustang,
Taurus 3.5L,
Transit 3.7L
A 3 IAT
EcoSport 2.0L C 3 IAT
All other vehicles B 2 IAT

Powertrain Control Module (PCM) Connector 

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

Vehicle Connector Pin Circuit
Continental 2.0L,
Escape/Kuga 2.0L,
Focus GTDI 2.0L,
Focus 2.3L,
Fusion 1.5L,
Fusion 2.0L,
MKC,
MKZ 2.0L,
Mustang 2.3L
198 PIN B19
B75
SIGRTN
IAT
Continental 3.7L,
Edge 3.5L,
F-150 TiVCT 3.5L,
F-150 5.0L,
F-Series Super Duty,
Flex TiVCT 3.5L,
MKT 3.7L,
MKX 3.7L,
Mustang 3.7L,
Taurus TiVCT 3.5L,
Taurus 3.7L,
Transit 3.7L
198 PIN E29
E27
SIGRTN
IAT
E-Series 6.2L 198 PIN B30
E27
SIGRTN
IAT
E-Series 6.8L,
F-650/F-750,
Motorhome/Stripped Chassis/Step Van,
Mustang 5.0L,
Mustang 5.2L
198 PIN B54
E27
SIGRTN
IAT
EcoSport 2.0L Manual Transmission,
EcoSport 1.6L
80 PIN E25
E3
SIGRTN
IAT
EcoSport 2.0L Automatic Transmission 128 PIN E43
E18
SIGRTN
IAT
Escape/Kuga 1.5L 198 PIN B24
B70
SIGRTN
IAT
Escape/Kuga 2.5L,
Fusion 2.5L,
Transit Connect
198 PIN B54
B25
SIGRTN
IAT
Explorer TiVCT 3.5L,
Explorer 3.7L
198 PIN E29
B27
SIGRTN
IAT
F-150 GTDI 3.5L 198 PIN E20
B34
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 1.0L 198 PIN B19
B76
SIGRTN
IAT
Focus GDI 2.0L 154 PIN E36
E10
SIGRTN
IAT
Ford GT 198 PIN B9
B75
E32
B76
SIGRTN
IAT
SIGRTN
IAT21
KA 128 PIN T17
T10
SIGRTN
IAT
All other vehicles 198 PIN B18
B75
SIGRTN
IAT