Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Pinpoint Tests FA: Ambient Air Temperature (AAT) Sensor: Introduction
2021 Ford Edge SE, 4WDSECTION Introduction
WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2022 Ford F-550 Super Duty, 2022 Ford F-450 Super Duty, 2022 Ford F-350 Super Duty, 2022 Ford F-250 Super Duty, and 2021 Ford F-550 Super Duty. 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 (12A647)
- harness circuits: AAT and SIGRTN
- PCM (12A650)
| Pin | Circuit |
|---|---|
| 2 | SIGRTN (Signal Return) |
| 1 | AAT (Ambient Air Temperature) |
| Vehicle | Connector | Pin | Circuit |
|---|---|---|---|
| F-150 Without Power Mirrors, F-Series Super Duty Without Power Mirrors | A | 3 1 |
SIGRTN AAT |
| F-150 With Power Mirrors, F-Series Super Duty With Power Mirrors | B | 2 6 |
SIGRTN AAT |
| Vehicle | Connector | Pin | Circuit |
|---|---|---|---|
| Transit Connect | A | 31 12 |
SIGRTN AAT |
| All other vehicles | B | 85 86 |
SIGRTN AAT |
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.