EGR Valve Position Sensor: Testing and Inspection
EGR VALVE POSITION SENSOROperational Inspection
1. Remove the engine control module (ECM).
2. Connect the special service tools (SST)s to the ECM.
3. Disconnect the vacuum hose from the EGR valve and connect the vacuum pump to the EGR valve.
4. Turn the ignition switch to ON.
5. Measure the voltage at the terminals as shown in the table below.
6. If not as specified, inspect the harness between EGR valve position sensor and ECM.
7. If the harnesses are OK, replace the EGR valve position sensor.
Component Inspection
1. Disconnect the EGR valve position sensor connector.
2. Disconnect the vacuum hose from the EGR valve and connect the vacuum pump to the EGR valve.
3. Use an ohmmeter to measure the resistance between the terminals as shown in the table below.
4. If not as specified, replace the EGR valve.