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 may cause driveability problems. For further information on sensor testing, see TESTS W/CODES - GS-R article.
Note. Unless stated otherwise, perform all voltage tests using a Digital Volt-Ohmmeter (DVOM) with a minimum 10-megohm input impedance.
EGR LIFT SENSOR VOLTAGE TABLE
| Applied Vacuum | Approximate Voltage |
|---|
| Engine At Idle No Vacuum Applied | 1.2 |
| 8 in. Hg (27 kPa) Vacuum Applied | 4.3 |
ENGINE COOLANT TEMPERATURE (ECT) SENSOR RESISTANCE
| Temperature - °F (°C) | Ohms |
|---|
| 4 (-20) | 15,000-18,000 |
| 32 (0) | 4500-7500 |
| 68 (20) | 2500-3500 |
| 104 (40) | 900-1800 |
| 176 (80) | 400-600 |
| 212 (100) | 250-350 |
| (1) Measure resistance across sensor terminals. |
| (1) | Measure resistance across sensor terminals. |
ENGINE COOLANT TEMPERATURE (ECT) SENSOR RESISTANCE (1)
FUEL TANK PRESSURE SENSOR VOLTAGE
| Fuel Tank Absolute Pressure | Approximate Voltage |
|---|
| 2 in. Hg (7 kPa) Vacuum Applied | 0.5 |
| 2 in. Hg (7 kPa) Pressure Applied | 4.5 |
| Ambient Pressure (Filler Cap Off) | 2.5 |
FUEL TANK PRESSURE SENSOR VOLTAGE
INTAKE AIR TEMPERATURE (IAT) SENSOR RESISTANCE
| Temperature - °F (°C) | Ohms |
|---|
| 4 (-20) | 15,000-18,000 |
| 32 (0) | 4500-7500 |
| 68 (20) | 2500-3500 |
| 104 (40) | 900-1800 |
| 176 (80) | 400-600 |
| 212 (100) | 250-350 |
| (1) Measure resistance across sensor terminals. |
| (1) | Measure resistance across sensor terminals. |
INTAKE AIR TEMPERATURE (IAT) SENSOR RESISTANCE (1)
MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR VOLTAGE
| Vacuum Applied (In. Hg) | Approximate Voltage |
|---|
| 0 | 2.8-3.0 |
| 5 | 2.3-2.5 |
| 10 | 1.8-2.0 |
| 15 | 1.3-1.5 |
| 20 | 0.8-1.0 |
| 25 | 0.3-0.5 |
| (1) Measure voltage between PCM terminals D3 (signal) and D11 (ground). |
| (1) | Measure voltage between PCM terminals D3 (signal) and D11 (ground). |
MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR VOLTAGE (1)
THROTTLE POSITION (TP) SENSOR VOLTAGE
| Position | Approximate Volts |
|---|
| Fully Closed | 0.5 |
| 1/2 Throttle | 2.3-2.7 |
| Fully Open | 4.5-4.8 |
| (1) Measure resistance between PCM terminals D1 (signal) and D11 (ground). |
| (1) | Measure resistance between PCM terminals D1 (signal) and D11 (ground). |
THROTTLE POSITION (TP) SENSOR VOLTAGE (1)
