EGR POSITION SENSOR Toyota Avalon XX20

EGR POSITION SENSOR

Note. EGR position sensor may also be referred to as EGR valve position sensor.

1. Disconnect electrical connector at EGR position sensor. EGR position sensor is located on top of EGR valve. (Scheme 191)
2. Using ohmmeter, check resistance between terminals E2 and VC on EGR position sensor. (Scheme 191) 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.
3. To test EGR position sensor output voltage, disconnect vacuum hose from EGR valve. Remove glove box for access to Engine Control Module (ECM).
4. Turn ignition on. Using voltmeter, check voltage between ECM terminals E2 and VC. (Scheme 192) See «ECM TERMINAL APPLICATION»(ref-3026-S25421040492000041700000) table for E2 and VC terminal wire colors. Voltage should be 4.5-5.5 volts. Remove voltmeter.
5. Connect voltmeter between ECM terminals E2 and EGLS. (Scheme 193) See «ECM TERMINAL APPLICATION»(ref-3026-S25421040492000041700000) table for E2 and EGLS terminal wire colors.
6. 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

Scheme 189

Scheme 190

Scheme 191