Pinpoint Test DN: Pressure And Temperature Sensors: Introduction: Notes
This pinpoint test is intended to diagnose the following:
- intake air temperature 2 (IAT2) sensor (12A697)
- manifold absolute pressure (MAP)/charge air cooler temperature (CACT) sensor (9F479)
- manifold absolute pressure (MAP)/intake air temperature 2 (IAT2) sensor (9F479)
- turbocharger boost pressure (TCBP)/charge air cooler temperature (CACT) sensor (9F479)
- harness circuits: IAT2, CACT, SIGRTN and VREF
- PCM (12A650)
Voltage values calculated for VREF equals 5 volts. These values can vary by 15% due to sensor and VREF variations.
TEMPERATURE SENSOR VOLTAGE AND RESISTANCE SPECIFICATIONS
| Temperature | Temperature Sensor Values | ||
|---|---|---|---|
| °C | °F | Voltage | Resistance (K ohms) |
| 120 | 248 | 0.28 | 1.18 |
| 110 | 230 | 0.36 | 1.55 |
| 100 | 212 | 0.47 | 2.07 |
| 90 | 194 | 0.61 | 2.80 |
| 80 | 176 | 0.80 | 3.84 |
| 70 | 158 | 1.05 | 5.37 |
| 60 | 140 | 1.37 | 7.70 |
| 50 | 122 | 1.77 | 10.97 |
| 40 | 104 | 2.23 | 16.15 |
| 30 | 86 | 2.74 | 24.27 |
| 20 | 68 | 3.26 | 37.30 |
| 10 | 50 | 3.73 | 58.75 |
| 0 | 32 | 4.14 | 95.85 |
| -10 | 14 | 4.45 | 160.31 |
| Pin | Circuit |
|---|---|
| 2 | SIGRTN (Signal Return) |
| 1 | IAT2 (Intake Air Temperature 2) |
Fig 3: Identifying Manifold Absolute Pressure/Charge Air Cooler Temperature (MAP/CACT) Sensor Connector
Courtesy of FORD MOTOR CO.| Pin | Circuit |
|---|---|
| 1 | SIGRTN (Signal Return) |
| 2 | CACT (Charge Air Cooler Temperature) |
Courtesy of FORD MOTOR CO.| Vehicle | Connector | Pin | Circuit |
|---|---|---|---|
| Edge 2.0L | A | 4 3 |
SIGRTN IAT2 |
| Edge 2.7L, Expedition, F-150 2.7L, Navigator, Transit |
B | 4 1 |
SIGRTN IAT2 |
| Fiesta, MKC, Mustang |
A | 1 2 |
SIGRTN IAT2 |
| All other vehicles | B | 4 3 |
SIGRTN IAT2 |
Fig 5: Identifying Turbocharger Boost Pressure/Charge Air Cooler Temperature (TCBP/CACT) Sensor Connector
Courtesy of FORD MOTOR CO.| Vehicle | Connector | Pin | Circuit |
|---|---|---|---|
| Escape/Kuga, Explorer 2.0L, Focus, MKT 2.0L |
A | 1 2 |
SIGRTN CACT |
| Expedition, Navigator |
B | 1 2 |
SIGRTN CACT |
| Fiesta, Fusion, MKC, MKZ, Taurus 2.0L, Transit Connect |
C | 1 2 |
SIGRTN CACT |
| All other vehicles | B | 4 3 |
SIGRTN CACT |