EGR Position Sensor Testing
NOTE:
EGR position sensor may also be referred to as EGR valve position sensor.
- Disconnect electrical connector from EGR position sensor. EGR position sensor is located on top of EGR valve. See Fig 1.
- Using ohmmeter, check resistance between terminals E2 and VC on EGR position sensor. See Fig 1. Resistance should be 1500-4300 ohms. If resistance is within specification, reinstall electrical connector on EGR position sensor and go to next step. If resistance is not within specification, replace EGR position sensor.
- To test EGR position sensor output voltage, disconnect vacuum hose from EGR valve. Remove glove box for access to Engine Control Module (ECM).
- Turn ignition on. Using voltmeter, check voltage between terminals No. 1 and 22 on ECM. Perform STEP 1. See Fig 2. See ECM TERMINAL APPLICATION table. Voltage should be 4.5-5.5 volts. Remove voltmeter.
- Connect voltmeter between terminals No. 15 and 22 on ECM. Perform STEP 2. See Fig 2. See ECM TERMINAL APPLICATION table.
- Using vacuum pump, apply 5.1 in. Hg of vacuum to EGR valve and note voltage. Voltage should be 3.2-5.1 volts with vacuum applied on EGR valve. Release vacuum from EGR valve and note voltage. Voltage should be .4-1.6 volts with vacuum released from EGR valve. Replace EGR position sensor if voltage is not within specification. Remove vacuum pump and reinstall vacuum hose on EGR valve.
ECM TERMINAL APPLICATION
| Application & Terminal No. | Wire Color |
|---|---|
| 1 | Blue/Red |
| 15 | Black/Orange |
| 22 | Brown |