Purge Control System Inspection

Purge Control System Inspection

If simulation function of M-MDS is used:
1. Start the engine.
2. Disconnect the vacuum hose between the purge solenoid valve and the charcoal canister.
3. Put a finger to the purge solenoid valve and verify that there is no vacuum applied when the engine is cold.
- If there is a vacuum, inspect the following:
- Wiring harness and connectors (Purge solenoid valve-PCM terminal 2AB)
- Purge solenoid valve (stuck open)

4. Connect the M-MDS to the DLC-2 and verify that the DTC P0403 is displayed. Perform the DTC inspection. (See DTC P0403[L3 WITH TC].) P0403
5. Select the EVAPCP PID.
6. Increase the duty value of the purge solenoid valve to 50% and inspect if the operation sound of the valve is heard.
- If the operation sound is heard, inspect for loose or damaged vacuum hoses. (Intake manifold-purge solenoid valve-charcoal canister)
- If the operation sound is not heard, perform the purge solenoid valve inspection. (See PURGE SOLENOID VALVE INSPECTION[L3 WITH TC].) Component Tests and General Diagnostics

7. Warm up the engine to normal operating temperature.
8. Monitor the EVAPCP PID using the M-MDS, and drive the vehicle approx. 2000 rpm for 30 s or more.
- If the EVAPCP PID is 0%, inspect the following.
- MAF, APP1, APP2, TP_REL and LOAD PIDs.

If simulation function of M-MDS is not used:
1. Start the engine.
2. Disconnect the vacuum hose between the purge solenoid valve and the charcoal canister.
3. Put a finger to the purge solenoid valve and verify that there is no vacuum applied when the engine is cold.
- If there is vacuum, inspect the following:
- Wiring harness and connectors (Purge solenoid valve-PCM terminal, 2AB)
- Purge solenoid valve

4. Warm up the engine to the normal operating temperature.
5. Stop the engine.
6. Connect the M-MDS to the DLC-2 and verify that the DTC P0443 is shown. Perform DTC inspection. (See DTC TABLE[L3 WITH TC].) Diagnostic Trouble Code Descriptions
7. Turn the ignition switch to the ON position.
8. Select the ECT PID.
9. Verify that the engine coolant temperature is above 60 °C (140 °F).
- If the M-MDS indicates that the temperature is below 60 °C (140 °F), perform the ECT sensor inspection.

10. Set the vehicle on the dynamometer or chassis roller.
11. Drive vehicle at an engine speed to approx. 2000 rpm for 30 s or more.
12. Put a finger to the purge solenoid valve and verify that there is no vacuum applied during Step 2.
- If there is no vacuum, inspect the following:
- Wiring harness and connector (Main relay-purge solenoid valve-PCM terminal 2AB)
- Purge solenoid valve
- MAF APP1, APP2, TP_REL and LOAD PIDs

- If there is vacuum, inspect the following:
- Vacuum hose (Purge solenoid valve-charcoal canister)