SENSOR RANGE CHARTS
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.
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 - °F (°C) | Ohms |
|---|
| 68 (20) | 2100-2900 |
| 122 (50) | 680-1000 |
| 176 (80) | 300-330 |
| (1) Measure resistance across sensor terminals. |
| (1) | Measure resistance across sensor terminals. |
COOLANT TEMPERATURE SENSOR RESISTANCE (1)
| Temperature - °F (°C) | Ohms |
|---|
| 212 (100) | 76,770-93,830 |
| (1) Heat sensor in water and measure resistance across sensor terminals. |
| (1) | Heat sensor in water and measure resistance across sensor terminals. |
EGR TEMPERATURE SENSOR RESISTANCE (1)
| Temperature - °F (°C) | Ohms |
|---|
| 68 (20) | 2100-2900 |
| 122 (50) | 680-1000 |
| 176 (80) | 300-330 |
| (1) Measure resistance between sensor terminals at pressure regulator. |
| (1) | Measure resistance between sensor terminals at pressure regulator. |
FUEL TEMPERATURE SENSOR RESISTANCE (1)
| Condition | Volts |
|---|
| Lean | 0-0.3 |
| Rich | 0.6-1.0 |
| (1) Measure voltage between oxygen sensor terminal and ground, voltage should continuously change. Measure heater resistance between terminals "A" and "C" at sensor. Resistance should be 3-1000 ohms. |
| (1) | Measure voltage between oxygen sensor terminal and ground, voltage should continuously change. Measure heater resistance between terminals "A" and "C" at sensor. Resistance should be 3-1000 ohms. |
HEATED OXYGEN SENSOR VOLTAGE (1)
| Position | Reading |
|---|
| Closed Throttle | Continuity |
| Open Throttle | No Continuity |
| (1) Check continuity between terminals No. 2 and 3 at sensor. (Scheme 1) |
| (1) | Check continuity between terminals No. 2 and 3 at sensor. (Scheme 1) |
CLOSED THROTTLE POSITION SWITCH CONTINUITY (1)
| Position | Ohms |
|---|
| Closed Throttle | 1700 |
| Partially Open | 1700-10,500 |
| Wide Open Throttle | 10,500 |
| (1) Measure resistance between terminals No. 4 and 5 at sensor. (Scheme 1) |
| (1) | Measure resistance between terminals No. 4 and 5 at sensor. (Scheme 1) |
THROTTLE POSITION SENSOR RESISTANCE (1)
| Application | Terminal No | Volts |
|---|
| J30 | "b" | 1.0-1.4 |
| (1) Measure voltage between ground and indicated airflow meter terminal with engine idling at normal operating temperature. |
| (1) | Measure voltage between ground and indicated airflow meter terminal with engine idling at normal operating temperature. |
MASS AIRFLOW SENSOR VOLTAGE (LOW RPM) (1)
| Application | Terminal No | Volts |
|---|
| J30 | "b" | 1.4-1.9 |
| (1) Measure voltage between ground and indicated airflow meter terminal with engine running at 2000 RPM at normal operating temperature. |
| (1) | Measure voltage between ground and indicated airflow meter terminal with engine running at 2000 RPM at normal operating temperature. |
MASS AIRFLOW SENSOR VOLTAGE (HIGH RPM) (1)
Scheme 1
