PINPOINT TEST DA: Intake Air Temperature (IAT) Sensor: Introduction: Notes
This pinpoint test is intended to diagnose the following:
- IAT sensor (12A697)
- integrated mass airflow/intake air temperature (MAF/IAT) sensor (12B579)
- harness circuits: IAT and SIGRTN
- powertrain control module (PCM) (12A650)
| Vehicle | Connector | Pin | Circuit |
|---|---|---|---|
| E-Series 5.4L, E-Series 4.6L, Edge 3.5L, Edge 3.7L, MKX |
A | 2 1 |
SIGRTN IAT |
| Escape 1.6L, Escape 2.0L, Focus GTDI 2.0L, Fusion 1.6L |
B | 1 2 |
SIGRTN IAT |
| Explorer GTDI 3.5L, Flex GTDI 3.5L, Fusion 1.5L, MKS 3.5L, MKT 3.5L, Taurus GTDI 3.5L, Transit Connect 1.6L |
C | 2 1 |
SIGRTN IAT |
| Fusion 2.0L | C | 1 2 |
SIGRTN IAT |
| MKZ 2.0L | B | 2 1 |
SIGRTN IAT |
| Motorhome/Stripped Chassis/Step Van | A | 4 2 |
GND IAT |
| All other vehicles | A | 4 2 |
SIGRTN IAT |
| Pin | Circuit |
|---|---|
| 1 | SIGRTN (Signal Return) |
| 2 | IAT (Intake Air Temperature) |