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.
SENSOR RANGE CHARTS
Note. Unless stated otherwise in test procedure, perform all voltage tests using a Digital Volt-Ohmmeter (DVOM) with a minimum 10-megohm input impedance.
| Temperature | Ohms |
|---|---|
| 68°F (20°C) | Approximately 2500 |
| 176°F (80°C) | Approximately 330 |
ENGINE COOLANT TEMPERATURE (ECT) SENSOR RESISTANCE
| Terminals | Ohms |
|---|---|
| 1 & 2 | 1000 |
| 1 & 3 | 0 |
| 2 & 3 | 0 |
CRANKSHAFT POSITION (CKP) SENSOR RESISTANCE
| Terminals | Ohms @ Closed Throttle | Ohms @ Slightly Open Throttle |
|---|---|---|
| 4 & 6 | 0 | Infinite |
CLOSED THROTTLE SWITCH RESISTANCE
| Terminals | Ohms @ Idle | Ohms @ Wide Open Throttle |
|---|---|---|
| 1 & 2 | 1500-2600 | N/A |
| 2 & 3 | 750-1300 | 3600 |
THROTTLE POSITION SENSOR (TPS) RESISTANCE
| Condition | (1) Volts |
|---|---|
| Key On Engine Off | Approx. 0.3-1.1 |
| Engine Running | Approx. 1.5-3.4 |
| (1) Backprobe connector terminals No. 1 and 2. | |
| (1) | Backprobe connector terminals No. 1 and 2. |
MASS AIRFLOW SENSOR TEST
| Condition | (1) Volts |
|---|---|
| Lean | Approx. 0.2 |
| Rich | Approx. 0.7 |
| (1) Measured between connector terminal and ground. | |
| (1) | Measured between connector terminal and ground. |
OXYGEN SENSOR VOLTAGE