EGR Position Sensor
- Backprobe EGR position sensor connector with voltmeter. See Fig 1 .
- With EGR vacuum hose disconnected, connect vacuum pump to the EGR valve. Turn ignition on and check voltages at connector. Use EGR POSITION SENSOR VOLTAGE table to compare results.
- If voltage is not correct at terminals A and B, check wiring harness and connection at ECU connector terminals 2A and 2C. If voltage is not correct at terminal C, check sensor resistance, harness and ECU connector terminal 2F.
- Check sensor resistance according to EGR POSITION SENSOR RESISTANCE table. If resistance is not within specifications, replace sensor.
EGR POSITION SENSOR VOLTAGE
| Terminal | Volts | |
|---|---|---|
| "A" | 4.5-5.5 | |
| "B" | Less Than 1.5 | |
| "C" | ||
| Without Vacuum | .25-.95 | |
| With Vacuum | Approx. 4 | |
EGR POSITION SENSOR RESISTANCE
| Terminals | Ohms |
|---|---|
| "A"-"B" | 5000 |
| "A"-"C" | 700-5000 |
| "B"-"C" | 700-5000 |