INTRODUCTION
Note. For sensor information on Villager, see SENSOR OPERATING RANGE CHARTS - VILLAGER . For sensor information on 7.3L diesel, see SELF-DIAGNOSTICS - EEC-V - DIESEL article.
Sensor operating range information can help determine if a sensor is out of calibration. An out-of-calibration sensor may not set a trouble code, but it will cause driveability problems.
Note. Unless specified otherwise, perform all voltage tests using a Digital Volt-Ohmmeter (DVOM) with minimum 10-megohm input impedance.
| Temperature - °F (°C) | (2) Volts | (3) Ohms |
|---|
| 4 (-20) | 4.66 | 276,960 |
| 14 (-10) | 4.45 | 160,310 |
| 32 (0) | 4.14 | 95,850 |
| 50 (10) | 3.73 | 58,990 |
| 68 (20) | 3.26 | 37,340 |
| 86 (30) | 2.74 | 24,250 |
| 104 (40) | 2.23 | 16,110 |
| 122 (50) | 1.77 | 10,930 |
| 140 (60) | 1.37 | 7550 |
| 158 (70) | 1.05 | 5340 |
| 176 (80) | 0.80 | 3840 |
| 194 (90) | 0.61 | 2800 |
| 212 (100) | 0.47 | 2080 |
| (1) Values may differ by as much as 15 percent. For additional testing, see TEST DJ: AIR CONDITIONING EVAPORATOR TEMPERATURE SENSOR under SYSTEM TESTS in SELF-DIAGNOSTICS - EEC-V - GASOLINE & NGV article. (2) Measure voltage by backprobing signal circuit to ground. (3) Measure resistance between sensor terminals. |
| (2) | Measure voltage by backprobing signal circuit to ground. |
| (3) | Measure resistance between sensor terminals. |
AIR CONDITIONING EVAPORATOR TEMPERATURE SENSOR SPECIFICATIONS (1)
| In. Hg | KPa | Frequency (Hz) | Altitude (Ft.) |
|---|
| 3.5 | 11.8 | 89.3 | N/A |
| 5 | 16.9 | 92.8 | N/A |
| 10 | 33.8 | 104.6 | N/A |
| 15 | 50.7 | 117.0 | 14,000 |
| 20 | 67.5 | 129.6 | 10,000 |
| 21 | 70.9 | 132.5 | 9000 |
| 22 | 74.3 | 135.4 | 8000 |
| 23 | 77.7 | 138.3 | 7000 |
| 24 | 81.1 | 141.1 | 6000 |
| 25 | 84.4 | 144.0 | 5000 |
| 26 | 87.8 | 146.9 | 4000 |
| 27 | 91.2 | 149.8 | 3000 |
| 28 | 94.6 | 152.8 | 2000 |
| 29 | 97.9 | 155.8 | 1000 |
| (1) Using scan tool, select BARO PID from PID/DATA monitor menu. BARO PID should be within 2 in. Hg (6 Hz) of altitude value. For additional testing, see TEST DQ: BAROMETRIC PRESSURE SENSOR under SYSTEM TESTS in SELF-DIAGNOSTICS - EEC-V - GASOLINE & NGV article. |
| (1) | Using scan tool, select BARO PID from PID/DATA monitor menu. BARO PID should be within 2 in. Hg (6 Hz) of altitude value. For additional testing, see TEST DQ: BAROMETRIC PRESSURE SENSOR under SYSTEM TESTS in SELF-DIAGNOSTICS - EEC-V - GASOLINE & NGV article. |
BARO SENSOR SPECIFICATIONS (1)
| Temperature - °F (°C) | Cold End Volts | Hot End Volts | (2) Ohms |
|---|
| 40 (-40) | 4.89 | N/A | 965,808 |
| 22 (-30) | 4.81 | N/A | 513,019 |
| 4 (-20) | 4.67 | N/A | 283,664 |
| 14 (-10) | 4.45 | N/A | 162,584 |
| 32 (0) | 4.14 | N/A | 96,255 |
| 50 (10) | 3.73 | N/A | 59,175 |
| 68 (20) | 3.26 | N/A | 37,387 |
| 86 (30) | 2.74 | N/A | 24,215 |
| 104 (40) | 2.23 | N/A | 16,043 |
| 122 (50) | 1.76 | N/A | 10,850 |
| 140 (60) | 1.36 | N/A | 7487 |
| 158 (70) | 1.04 | N/A | 5268 |
| 176 (80) (3) | .79 | 3.99 | 3775 |
| 185 (85) (3) | .69 | 3.86 | 3215 |
| 194 (90) (3) | .60 | 3.71 | 2750 |
| 203 (95) (3) | .53 | 3.56 | 2361 |
| 212 (100) (3) | .46 | 3.41 | 2034 |
| 230 (110) | N/A | 3.07 | 1523 |
| 248 (120) | N/A | 2.74 | 1155 |
| 266 (130) | N/A | 2.41 | 887 |
| 284 (140) | N/A | 2.10 | 689 |
| 302 (150) | N/A | 1.81 | 542 |
| 320 (160) | N/A | 1.55 | 430 |
| 338 (170) | N/A | 1.33 | 345 |
| 356 (180) | N/A | 1.13 | 279 |
| 374 (190) | N/A | .96 | 228 |
| 392 (200) | N/A | .82 | 188 |
| 410 (210) | N/A | .70 | 155 |
| 428 (220) | N/A | .60 | 130 |
| 446 (230) | N/A | .51 | 109 |
| 464 (240) | N/A | .44 | 92 |
| 482 (250) | N/A | .35 | 78 |
| 500 (260) | N/A | .33 | 67 |
| (1) Value may vary by 15 percent. For additional testing, see TEST DL: CYLINDER HEAD TEMPERATURE SENSOR under SYSTEM TESTS in SELF-DIAGNOSTICS - EEC-V - GASOLINE & NGV article. (2) Measure resistance between cylinder head temperature sensor terminals. (3) At this temperature, there is a voltage overlap zone where it is possible to have either a cold end (low voltage) or hot end (high voltage) reading at the same temperature. Either voltage specification listed is correct. |
| (2) | Measure resistance between cylinder head temperature sensor terminals. |
| (3) | At this temperature, there is a voltage overlap zone where it is possible to have either a cold end (low voltage) or hot end (high voltage) reading at the same temperature. Either voltage specification listed is correct. |
CYLINDER HEAD TEMPERATURE SENSOR SPECIFICATIONS (1)
| Temperature - °F (°C) | (2) (3) Volts | (2) (4) Volts | (5) Ohms |
|---|
| 14 (-10) | 4.45 | 4.15 | 160,310 |
| 32 (0) | 4.14 | 3.91 | 95,850 |
| 50 (10) | 3.73 | 3.51 | 58,750 |
| 68 (20) | 3.26 | 3.07 | 37,300 |
| 86 (30) | 2.74 | 2.60 | 24,270 |
| 104 (40) | 2.23 | 2.13 | 16,150 |
| 122 (50) | 1.77 | 1.70 | 10,970 |
| 140 (60) | 1.37 | 1.33 | 7600 |
| 158 (70) | 1.05 | 1.02 | 5370 |
| 176 (80) | 0.80 | 0.78 | 3840 |
| 194 (90) | 0.61 | 0.60 | 2800 |
| 212 (100) | 0.47 | 0.46 | 2070 |
| 230 (110) | 0.36 | 0.35 | 1550 |
| 248 (120) | 0.28 | 0.27 | 1180 |
| (1) Values may differ by as much as 15 percent. For additional testing, see TEST DA: TEMPERATURE SENSOR TEST (IAT, ECT & EOT) under SYSTEM TESTS in SELF-DIAGNOSTICS - EEC-V - GASOLINE & NGV article. (2) Measure voltage by backprobing signal circuit to ground. (3) Applies to Focus models only. (4) Applies to all models, except Focus. (5) Measure resistance between sensor terminals. |
| (2) | Measure voltage by backprobing signal circuit to ground. |
| (3) | Applies to Focus models only. |
| (4) | Applies to all models, except Focus. |
| (5) | Measure resistance between sensor terminals. |
ENGINE COOLANT TEMPERATURE SENSOR, INTAKE AIR TEMPERATURE SENSOR & ENGINE OIL TEMPERATURE SENSOR SPECIFICATIONS (1)
| Temperature - °F (°C) | (2) Volts | (3) Ohms |
|---|
| 40 (-40) | 4.54 | 92,500 |
| 50 (10) | 3.51 | 58,750 |
| 68 (20) | 3.07 | 27,300 |
| 86 (30) | 2.60 | 24,270 |
| 104 (40) | 2.13 | 16,150 |
| 122 (50) | 1.70 | 10,970 |
| 140 (60) | 1.33 | 7700 |
| 158 (70) | 1.02 | 5370 |
| 176 (80) | 0.78 | 3840 |
| 194 (90) | 0.60 | 2800 |
| 212 (100) | 0.46 | 2070 |
| 230 (110) | 0.35 | 1550 |
| 248 (120) | 0.27 | 1180 |
| 275 (135) | 0.19 | 810 |
| 302 (150) | 0.13 | 560 |
| (1) Values may differ by as much as 15 percent. For additional testing, see TEST DB: ENGINE FUEL TEMPERATURE SENSOR under SYSTEM TESTS in SELF-DIAGNOSTICS - EEC-V - GASOLINE & NGV article. (2) Measure by backprobing signal circuit to ground. (3) Measure resistance between sensor terminals. |
| (2) | Measure by backprobing signal circuit to ground. |
| (3) | Measure resistance between sensor terminals. |
ENGINE FUEL TEMPERATURE SENSOR SPECIFICATIONS (1)
| Volts (1) | Pressure - psi (kPa) |
|---|
| Natural Gas Vehicles |
| 4.5 | 150 (1034) |
| 4.1 | 140 (965) |
| 3.7 | 130 (896) |
| 3.3 | 120 (827) |
| 2.9 | 110 (758) |
| 2.5 | 100 (689) |
| 2.1 | 90 (620) |
| 1.7 | 80 (551) |
| 1.3 | 70 (482) |
| 0.9 | 60 (413) |
| 0.5 | 50 (344) |
| 0.1 | 40 (275) |
| 0.0 | 37.6 (259) |
| Except Natural Gas Vehicles |
| 4.5 | 70 (482) |
| 3.9 | 60 (413) |
| 3.4 | 50 (344) |
| 2.8 | 40 (275) |
| 2.2 | 30 (207) |
| 1.6 | 20 (138) |
| 1.1 | 10 (69) |
| 0.5 | 0.0 (0.0) |
| (1) For additional testing, see TEST DD: FUEL RAIL PRESSURE SENSOR under SYSTEM TESTS in SELF-DIAGNOSTICS - EEC-V - GASOLINE & NGV article. |
FUEL RAIL PRESSURE SENSOR VOLTAGE-TO-FUEL PRESSURE CONVERSION
| Temperature - °F (°C) | (2) Volts | (3) Ohms |
|---|
| 50 (10) | 3.51 | 58,750 |
| 68 (20) | 3.07 | 37,300 |
| 86 (30) | 2.60 | 24,270 |
| 104 (40) | 2.13 | 16,150 |
| 122 (50) | 1.70 | 10,970 |
| 140 (60) | 1.33 | 7600 |
| 158 (70) | 1.02 | 5370 |
| 176 (80) | 0.78 | 3840 |
| 194 (90) | 0.60 | 2800 |
| 212 (100) | 0.46 | 2070 |
| 230 (110) | 0.35 | 1550 |
| 248 (120) | 0.27 | 1180 |
| (1) Values may differ by as much as 15 percent. For additional testing, see TEST DU: INTAKE AIR TEMPERATURE 2 under SYSTEM TESTS in SELF-DIAGNOSTICS - EEC-V - GASOLINE & NGV article. (2) Measure voltage by backprobing signal circuit to ground. (3) Measure resistance between sensor terminals. |
| (1) | Values may differ by as much as 15 percent. For additional testing, see TEST DU: INTAKE AIR TEMPERATURE 2 under SYSTEM TESTS in SELF-DIAGNOSTICS - EEC-V - GASOLINE & NGV article. |
| (2) | Measure voltage by backprobing signal circuit to ground. |
| (3) | Measure resistance between sensor terminals. |
INTAKE AIR TEMPERATURE 2 SENSOR SPECIFICATIONS (1)
| Barometric Pressure - In. Hg (kPa) | BARO/MAP PID (Hz) | Altitude |
|---|
| 3.5 (11.8) | 89.3 | N/A |
| 5.0 (16.9) | 92.8 | N/A |
| 10.0 (33.8) | 104.6 | N/A |
| 15.0 (50.7) | 117.0 | 14,000 |
| 20.0 (67.5) | 129.6 | 10,000 |
| 21.0 (70.90 | 132.5 | 9000 |
| 22.0 (74.3) | 135.4 | 8000 |
| 23.0 (77.7) | 138.3 | 7000 |
| 24.0 (81.1) | 141.1 | 6000 |
| 25.0 (84.4) | 144.0 | 5000 |
| 26.0 (87.8) | 146.9 | 4000 |
| 27.0 (91.2) | 149.8 | 3000 |
| 28.0 (94.6) | 152.8 | 2000 |
| 29.0 (97.9) | 155.8 | 1000 |
| 30.0 (101.3) | 158.9 | 0 (Sea Level) |
| 31.0 (104.7) | 162.0 | N/A |
| 31.875 (107.70 | 164.7 | N/A |
Scheme 1
