Pinpoint Tests DA: Intake Air Temperature (IAT) Sensor: 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:
- IAT sensor (12A697)
- integrated mass airflow/intake air temperature (MAF/IAT) sensor (12B579)
- manifold absolute pressure and temperature (MAPT) sensor (9F479)
- harness circuits: IAT and SIGRTN
- PCM (12A650)
| Vehicle | Connector | Pin | Circuit |
|---|---|---|---|
| E-Series, F-650/F-750, F-Series Super Duty, Motorhome/Stripped Chassis/Step Van | A | 3 4 |
SIGRTN IAT |
| EcoSport 2.0L, Ford GT, Mustang 5.0L, Mustang TiVCT 5.2L, Transit Connect 2.0L, Transit Connect 2.5L | B | 4 2 |
SIGRTN IAT |
| KA | C | 1 2 |
SIGRTN IAT |
| All other vehicles | D | 2 1 |
SIGRTN IAT |
Fig 2: Mass Air Flow Bank 2, Sensor 1/Intake Air Temperature Bank 2, Sensor 1 (MAF21/IAT21) Sensor Connector
| Pin | Circuit |
|---|---|
| 4 | SIGRTN (Signal Return) |
| 2 | IAT21 (Intake Air Temperature Bank 2, Sensor 1) |
| Vehicle | Connector | Pin | Circuit |
|---|---|---|---|
| Continental, EcoSport 1.5L, Edge, Explorer 3.3L, KA, Nautilus, Transit Connect 1.0L | A | 4 3 |
SIGRTN IAT |
| Corsair 2.5L, Escape/Kuga 2.5L, F-150 3.3L, F-150 5.0L, F-Series Super Duty 6.2L | B | 4 3 |
SIGRTN IAT |
| Ranger 2.5L | C | 4 3 |
SIGRTN IAT |
| Transit TiVCT 3.5L | A | 4 1 |
SIGRTN IAT |
Powertrain Control Module (PCM) Connector
For PCM connector views or reference values, refer to Reference Values.
| Vehicle | Connector | Pin | Circuit |
|---|---|---|---|
| Aviator, Explorer 3.0L, Mustang 5.2L Supercharged | 306 PIN | B28 B24 |
SIGRTN IAT |
| Continental, EcoSport 1.0L Manual Transmission | 198 PIN | B19 B75 |
SIGRTN IAT |
| Corsair 2.5L, Escape/Kuga 2.5L | 198 PIN | E77 E24 |
SIGRTN IAT |
| E-Series, Edge 2.7L, F-650/F-750, F-Series Super Duty 7.3L, Motorhome/Stripped Chassis/Step Van, Mustang 5.0L, Nautilus 2.7L | 306 PIN | B58 B24 |
SIGRTN IAT |
| EcoSport 1.0L Automatic Transmission | 198 PIN | B19 B77 |
SIGRTN IAT |
| EcoSport 1.5L Automatic Transmission, KA 1.5L Automatic Transmission | 198 PIN | E35 E24 |
SIGRTN IAT |
| EcoSport 1.5L Manual Transmission, KA 1.2L, KA 1.5L Manual Transmission | 112 PIN | E4 E20 |
SIGRTN IAT |
| EcoSport 2.0L | 198 PIN | B9 B75 |
SIGRTN IAT |
| Expedition High Output, Navigator High Output | 198 PIN | E20 B34 |
SIGRTN IAT |
| Expedition Base, Navigator Base, Transit GTDI 3.5L | 306 PIN | B26 B24 |
SIGRTN IAT |
| Explorer 3.3L, F-Series Super Duty 6.2L | 306 PIN | E13 E52 |
SIGRTN IAT |
| F-150 2.7L, F-150 3.5L | 306 PIN | B40 B35 |
SIGRTN IAT |
| F-150 3.3L, F-150 5.0L | 306 PIN | E89 E72 |
SIGRTN IAT |
| Ford GT | 198 PIN | B9 B75 E32 B76 |
SIGRTN IAT SIGRTN IAT21 |
| KA 1.0L | 128 PIN | T17 T10 |
SIGRTN IAT |
| Mustang TiVCT 5.2L | 198 PIN | B54 E27 |
SIGRTN IAT |
| Ranger 2.5L | 128 PIN | B38 E17 |
SIGRTN IAT |
| Transit TiVCT 3.5L | 306 PIN | E13 E50 |
SIGRTN IAT |
| Transit Connect 2.0L | 198 PIN | B89 B56 |
SIGRTN IAT |
| Transit Connect 2.5L | 198 PIN | B54 B25 |
SIGRTN IAT |
| All other vehicles | 198 PIN | B36 B56 |
SIGRTN IAT |