EGR Position Sensor
- Disconnect vacuum hose from EGR valve and connect vacuum pump. Disconnect EGR position sensor connector. Turn ignition on. Check voltage of each terminal. See Fig 1
. See EGR POSITION SENSOR VOLTAGE table.EGR POSITION SENSOR VOLTAGE
Terminal Voltage (No Vacuum) Voltage (6 in. Hg Vac.) "A" .7 4.7 "B" 1.5 or less 1.5 or less "C" 4.5-5.5 4.5-5.5 - If voltage reading is not as specified at terminals "B" and "C", check wiring harness and ECU terminals "1D", "1F", and "1G". See PIN VOLTAGE CHARTS article.
- If voltage is not as specified at terminal "A", check wiring harness and ECU. Disconnect sensor connector. Using an ohmmeter, check resistance between sensor terminals while applying 6 in. Hg to EGR control valve. See EGR POSITION SENSOR RESISTANCE table.
EGR POSITION SENSOR RESISTANCE
| Terminals | Ohms |
|---|---|
| "B"-"C" | 5000 |
| "A"-"C" | 0-5500 |
| "A"-"B" | 700-6000 |