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.
2020 Ford Escape SE Plug-In HybridFACTORY OEM SERVICE PROCEDURE
Pinpoint Tests DA: Intake Air Temperature (IAT) Sensor: Introduction
WARNING:
To prevent the risk of high-voltage shock, always follow precisely all warnings and service instructions, including instructions to depower the system. The high-voltage system utilizes approximately 300 volts DC, provided through high-voltage cables to its components and modules. The high-voltage cables and wiring are identified by orange harness tape or orange wire covering. All high-voltage components are marked with high-voltage warning labels with a high-voltage symbol. Failure to follow these instructions may result in serious personal injury or death.
This pinpoint test is intended to diagnose the following:
- integrated mass airflow (MAF)/intake air temperature (IAT) sensor (12B579)
- harness circuits: IAT and SIGRTN
- PCM (12A650)
Voltage values calculated for VPWR equals 5 volts. These values can vary by 15% due to sensor and VPWR variations.
Harness Side
| Circuit | Pin |
|---|---|
| VPWR (Vehicle Power) | 3 |
| IAT (Intake Air Temperature) | 2 |
| SIGRTN (Signal Return) | 4 |
Harness Side
| Circuit | Pin |
|---|---|
| IAT (Intake Air Temperature) | E17 |
| SIGRTN (Signal Return) | E6 |
Factory Service Tools
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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.