INTRODUCTION
Note. For sensor information on 6.0L or 7.3L diesel, see SELF-DIAGNOSTICS - 6.0L DIESEL or SELF-DIAGNOSTICS - 7.3L 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 - CNG, FLEX-FUEL & GASOLINE 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)
Scheme 1
| In. Hg | KPa | Volts | Altitude (Ft.) |
|---|
| 3.5 | 11.8 | 0.15 | N/A |
| 5 | 16.9 | 0.40 | N/A |
| 10 | 33.8 | 1.25 | N/A |
| 15 | 50.7 | 2.10 | 14,000 |
| 20 | 67.5 | 2.90 | 10,000 |
| 21 | 70.9 | 3.10 | 9000 |
| 22 | 74.3 | 3.30 | 8000 |
| 23 | 77.7 | 3.50 | 7000 |
| 24 | 81.1 | 3.62 | 6000 |
| 25 | 84.4 | 3.80 | 5000 |
| 26 | 87.8 | 4.00 | 4000 |
| 27 | 91.2 | 4.14 | 3000 |
| 28 | 94.6 | 4.30 | 2000 |
| 29 | 97.9 | 4.50 | 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 - CNG, FLEX-FUEL & GASOLINE 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 - CNG, FLEX-FUEL & GASOLINE 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 - CNG, FLEX-FUEL & GASOLINE 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)
Note. Two different types of internal temperature circuits are used by the PCM. One circuit has a pull-down resistor to SIG RTN and the other does not have a pull-down resistor. To determine if an internal PCM pull-down resistor is used, disconnect the temperature sensor and measure voltage between temperature sensor signal (ECT, IAT or EOT) at sensor harness connector and ground with the key on. If voltage is 5.0 volts, no resistor is used.
| 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 - CNG, FLEX-FUEL & GASOLINE article. (2) Measure voltage by backprobing signal circuit to ground. (3) With out resistor. (4) With resistor. (5) Measure resistance between sensor terminals. |
| (2) | Measure voltage by backprobing signal circuit to ground. |
| (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 - CNG, FLEX-FUEL & GASOLINE 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 - CNG, FLEX-FUEL & GASOLINE 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 - CNG, FLEX-FUEL & GASOLINE 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 - CNG, FLEX-FUEL & GASOLINE 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 |
MASS AIRFLOW SENSOR BAROMETRIC PRESSURE REFERENCE CHART
Scheme 2
