EGR Valve Position Sensor: Testing and Inspection

INSPECTION
- Remove the air intake hose.
- Disconnect the EGR valve position sensor connector.




- Measure the resistance between terminals A and B by using an ohmmeter.

Specification: 2.7 kohms

- If not as specified, replace the EGR valve.
- Connect the EGR valve position sensor connector.
- Connect the air intake hose.







- Connect the SSTs (Engine Signal Monitor) to the PCM.




- Disconnect the vacuum hose from the vacuum tube and install a vacuum pump to the valve.
- Turn the ignition switch to ON.
- Measure the voltage at the PCM terminal 3J.




- If not as specified, inspect the harness and connector between the EGR valve position sensor and the PCM terminal.
- If these harness and connector are OK, replace the EGR valve.

USING THE NGS
- Remove the air intake hose.
- Disconnect the EGR valve position sensor connector.




- Measure the resistance between terminals A and B of the connector by using an ohmmeter.

Specification: 2.7 kohms

- If not as specified, replace the EGR valve.
- Connect the EGR valve position sensor connector.
- Connect the air intake hose.
- Connect the SSTs (NGS) to the data link connector-2.
- Select the PID/DATA MONITOR AND RECORD function.
- Disconnect the vacuum hose from the vacuum tube and install a vacuum pump to the valve.
- Select the "EGRP V" on the NGS display. The NGS measures and shows the voltage.




- If not as specified, inspect the harness and connector between the EGR valve position sensor and the PCM terminal.
- If these harness and connector are OK, replace the EGR valve.