INTRODUCTION
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. All voltage tests should be performed with a Digital Volt-Ohmmeter (DVOM) with a minimum 10-megohm input impedance, unless stated differently in testing procedures.
ACT, ECT & VAT SENSOR SPECIFICATIONS
Note. For resistance test, measure resistance across sensor terminals.
| Sensors °F (°C) | Specifications Volts (K Ohms) |
|---|
| ECT & ACT (Except 2.2L Probe) |
| 248 (120) | 0.27 (1.18) |
| 230 (110) | 0.35 (1.55) |
| 212 (100) | 0.46 (2.07) |
| 194 (90) | 0.60 (2.80) |
| 176 (80) | 0.78 (3.84) |
| 158 (70) | 1.02 (5.37) |
| 140 (60) | 1.33 (7.70) |
| 122 (50) | 1.70 (10.97) |
| 104 (40) | 2.13 (16.15) |
| 86 (30) | 2.60 (24.27) |
| 68 (20) | 3.07 (37.30) |
| 50 (10) | 3.51 (58.75) |
| VAT |
| 248 (120) | 0.38 (0.11) |
| 230 (110) | 0.46 (0.14) |
| 212 (100) | 0.56 (0.19) |
| 194 (90) | 0.76 (0.25) |
| 176 (80) | 0.95 (0.33) |
| 158 (70) | 1.19 (0.44) |
| 140 (60) | 1.49 (0.60) |
| 122 (50) | 1.84 (0.83) |
| 104 (40) | 2.23 (1.18) |
| 86 (30) | 2.65 (1.70) |
| 68 (20) | 3.07 (2.50) |
| 50 (10) | 3.46 (3.77) |
ECT, ACT & VAT SENSORS RESISTANCE & VOLTAGE SPECIFICATIONS (EXCEPT 2.2L PROBE)
| Temperature °F (°C) | Voltage | (1) Resistance Ohms |
|---|
| 4 (-20) | 4.70 | 10-20 |
| 32 (0) | 3.40 | 4-7 |
| 68 (20) | 2.50 | 2-3 |
| 104 (40) | 2.00 | 0.9-1.3 |
| 140 (60) | 1.20 | 0.4-0.7 |
| 176 (80) | 0.70 | 0.2-0.4 |
| (1) Measure resistance between sensor signal circuit and SIG RTN pin. |
| (1) | Measure resistance between sensor signal circuit and SIG RTN pin. |
ECT & VAT SENSORS (PROBE 2.2L)
EGR POSITION VALVE (EVP) SENSOR SPECIFICATIONS
| EGR Valve Opening (%) | Voltage |
|---|
| 0 | 0.40 |
| 10 | 0.75 |
| 20 | 1.10 |
| 30 | 1.45 |
| 40 | 1.80 |
| 50 | 2.15 |
| 60 | 2.50 |
| 70 | 2.85 |
| 80 | 3.20 |
| 90 | 3.55 |
| 100 | 3.90 |
EVP SENSOR VOLTAGE (EXCEPT 2.2L PROBE)
| Manifold Vacuum In. Hg | Voltage |
|---|
| 0 | 0.867 |
| 1 | 0.893 |
| 2 | 0.923 |
| 3 | 1.434 |
| 4 | 1.84 |
| 5 | 2.09 |
| 6 | 3.86 |
| 7 | 4.93 |
| 8 | 4.93 |
| (1) Measure voltage between EVP pin and SIG RTN pin. |
| (1) | Measure voltage between EVP pin and SIG RTN pin. |
EVP SENSOR VOLTAGE (PROBE 2.2L) (1)
MASS AIRFLOW (MA) SENSOR SPECS
| Application | Voltage |
|---|
| Idle | 0.60 |
| 20 MPH | 1.10 |
| 40 MPH | 1.70 |
| 60 MPH | 2.10 |
Note. MA signal voltage is typical for an A/T equipped vehicle at normal operating temperature. Voltage signal may vary due to engine load and temperature.
MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR SPECIFICATIONS
| Barometric Pressure In. Hg | Frequency Hz |
|---|
| 17.1 | 122.4 |
| 18.3 | 125.5 |
| 19.5 | 128.7 |
| 20.7 | 131.9 |
| 21.8 | 135.1 |
| 23.0 | 138.3 |
| 24.2 | 141.8 |
| 25.4 | 145.4 |
| 26.6 | 148.9 |
| 27.7 | 152.5 |
| 28.9 | 156.1 |
| 30.1 | 159.6 |
| 31.0 | 162.4 |
MAP/BP SENSOR SPECIFICATIONS
| Manifold Vacuum In. Hg | Frequency Hz |
|---|
| 0 | 159 |
| 3 | 150 |
| 6 | 141 |
| 9 | 133 |
| 12 | 125 |
| 15 | 117 |
| 18 | 109 |
| 21 | 102 |
| 24 | 95 |
| 27 | 88 |
| 30 | 80 |
MAP SENSOR SPECIFICATIONS
OXYGEN (O2) SENSOR SPECIFICATIONS
| Condition | Voltage |
|---|
| Increasing Engine Speed | Increases |
| Decreasing Engine Speed | Decreases |
| Engine At Idle | 0.2-0.8 |
| (1) Measure between oxygen sensor and GND. |
| (1) | Measure between oxygen sensor and GND. |
OXYGEN SENSOR VOLTAGE (PROBE 2.2L) (1)
THROTTLE POSITION SENSOR (TPS) SPECIFICATIONS
Note. Measure voltage between SIG RTN pin and VREF pin.
| Application | Rotational Degree Range | Voltage Range | (2) Minimum | (2) Maximum |
|---|
| 1.9L PFI | 4-13.0° | 0.80-1.20 | 0.24 | 4.84 |
| 1.9L MA PFI | 3-13.0° | 0.70-1.20 | 0.20 | 4.84 |
| 1.9L TBI |
| Off | 0-12.0° | 0.49-1.15 | 0.39 | 4.84 |
| Run | 2.5-14.0° | 0.71-1.25 | 0.39 | 4.84 |
| 2.3L OHC PFI | 0-13.5° | 0.59-1.22 | 0.20 | 4.84 |
| 2.3L HSC PFI | 0-13.5° | 0.73-1.22 | 0.20 | 4.84 |
| 3.0L PFI | 0-13.5° | 0.59-1.22 | 0.34 | 4.84 |
| 3.0L SHO MA PFI | 0-4.5° | 0.38-0.82 | 0.23 | 4.89 |
| 3.8L PFI FWD & RWD) | 3-13.5° | 0.73-1.22 | 0.39 | 4.84 |
| 3.8L MA PFI | 0-13.5° | 0.49-1.22 | 0.39 | 4.84 |
| 5.0L PFI | 3-13.5° | 0.73-1.22 | 0.39 | 4.84 |
| 5.0L MA PFI | 0-13.5° | 0.49-1.22 | 0.39 | 4.84 |
| (1) Throttle Position (TP) sensor setting (KOEO & KOER) (2) TPS circuit signal voltage range. |
| (1) | Throttle Position (TP) sensor setting (KOEO & KOER) |
| (2) | TPS circuit signal voltage range. |
THROTTLE POSITION SENSOR SPECIFICATIONS (CAR MODELS) (1)
| Throttle Position | (1) Volts | (2) Ohms |
|---|
| 1/8 | 0.998 | 0.989 |
| 2/8 | 1.60 | 1.104 |
| 3/8 | 2.37 | 1.278 |
| 4/8 | 2.74 | 1.462 |
| 5/8 | 3.15 | 1.480 |
| 6/8 | 3.43 | 1.459 |
| 7/8 | 3.60 | 1.144 |
| 8/8 | 4.02 | 1.072 |
| (1) Measure voltage between TP terminal and SIG RTN pin. (2) Measure resistance between TP terminal and SIG RTN pin. |
| (1) | Measure voltage between TP terminal and SIG RTN pin. |
| (2) | Measure resistance between TP terminal and SIG RTN pin. |
THROTTLE POSITION SENSOR (PROBE 2.2L)
Note. Voltage values are calculated based on a VREF of 5.0 volts. Actual values may vary up to 15% due to sensor and VREF variations.
VANE AIRFLOW SENSOR SPECIFICATIONS
| Vane Door Position | Volts |
|---|
| 1/8 | 3.24 |
| 2/8 | 5.60 |
| 3/8 | 5.62 |
| 4/8 | 5.83 |
| 5/8 | 6.02 |
| 6/8 | 6.57 |
| 7/8 | 7.46 |
| 8/8 | 7.87 |
| (1) Measure voltage between VAF pin and SIG RTN pin. |
| (1) | Measure voltage between VAF pin and SIG RTN pin. |
VANE AIRFLOW VOLTAGE (2.2L PROBE) (1)
| Airflow m(3)/hr | Volts |
|---|
| 9 | 0.80 |
| 16 | 1.35 |
| 26 | 1.85 |
| 40 | 2.25 |
| 60 | 2.65 |
| 100 | 3.15 |
| 160 | 3.60 |
| 240 | 4.0 |
| 380 | 4.5 |
VANE AIRFLOW VOLTAGE (1.9L ESCORT)
Note. Airflow equals volume of air flowing through VAF meter per hour. As airflow increases, so will output voltage.
