Pinpoint Test Fa: Ambient Air Temperature (AAT) Sensor: Introduction
WARNING: This page does not describe the selected car, but rather 31 other vehicles, including the 2017 Lincoln Navigator, 2017 Lincoln MKZ, 2017 Lincoln MKX, 2017 Lincoln MKT, and 2017 Lincoln MKC. However, it is still accessible from the selected car via links, so may be relevant.
This pinpoint test is intended to diagnose the following:
- AAT sensor
- harness circuits: AAT and SIGRTN
- PCM (12A650)
Ambient Air Temperature (AAT) Sensor Expected Values
| Temperature | AAT Sensor Values | |
|---|---|---|
| °C | °F | Resistance (K ohms) |
| -1.1 to 4.4 | 30 to 40 | 8.14 to 9.85 (Focus), 27.49 to 33.47 (All Others) |
| 4.4 to 10 | 40 to 50 | 6.01 to 8.14 (Focus), 22.06 to 28.86 (All Others) |
| 10 to 15.6 | 50 to 60 | 4.90 to 6.01 (Focus), 16.63 to 23.10 (All Others) |
| 15.6 to 21.1 | 60 to 70 | 3.79 to 4.90 (Focus), 11.74 to 17.32 (All Others) |
| 21.1 to 26.7 | 70 to 80 | 2.86 to 3.79 (Focus), 9.34 to 12.14 (All Others) |
| 26.7 to 32.2 | 80 to 90 | 2.34 to 2.86 (Focus), 8.49 to 9.62 (All Others) |
| 32.2 to 37.8 | 90 to 100 | 1.81 to 2.34 (Focus), 5.93 to 7.87 (All Others) |
| 37.8 to 43.3 | 100 to 110 | 1.43 to 1.82 (Focus), 4.78 to 6.11 (All Others) |
| Vehicle | Connector | Pin | Circuit |
|---|---|---|---|
| EcoSport | A | 1 2 |
SIGRTN AAT |
| F-Series Super Duty | B | 2 1 |
SIGRTN AAT |
| Transit | A | 2 1 |
SIGRTN AAT |
| All other vehicles | C | 2 1 |
SIGRTN AAT |
| Pin | Circuit |
|---|---|
| 10 | SIGRTN (Signal Return) |
| 9 | AAT (Ambient Air Temperature) |
| Vehicle | Connector | Pin | Circuit |
|---|---|---|---|
| EcoSport | A | 27 24 |
SIGRTN AAT |
| All other vehicles | A | 19 20 |
SIGRTN AAT |
Powertrain Control Module (PCM) Connector
For PCM connector views or reference values, refer to REFERENCE VALUES .
| Vehicle | Connector | Pin | Circuit |
|---|---|---|---|
| Continental 3.7L, Edge 3.5L, Explorer TiVCT 3.5L, Explorer 3.7L, 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, Mustang 5.0L, Mustang 5.2L, Taurus TiVCT 3.5L, Taurus 3.7L, Transit 3.7L |
198 PIN | B51 B47 |
SIGRTN AAT |
| Escape/Kuga 1.5L | 198 PIN | B24 B72 |
SIGRTN AAT |
| Escape/Kuga 2.5L, Transit Connect |
198 PIN | B30 B47 |
SIGRTN AAT |
| F-150 GTDI 3.5L | 198 PIN | B30 B51 |
SIGRTN AAT |
| Focus GDI 2.0L | 154 PIN | B34 B35 |
SIGRTN AAT |
| Fusion 2.5L | 198 PIN | B33 B47 |
SIGRTN AAT |
| KA | 128 PIN | T20 T2 |
SIGRTN AAT |
| All other vehicles | 198 PIN | B18 B51 |
SIGRTN AAT |