Purge Control System Inspection

Purge Control System Inspection
1. Start the engine.
2. Disconnect the vacuum hose at quick release connector.
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 2P)
- 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 PO443 is shown. Perform the DTC inspection. (See DTC TABLE.) Diagnostic Trouble Code Descriptions
7. Turn the ignition switch to the ON position.
8. Select the ECT PID.
9. Verify that the engine is warmed up completely.
- If the engine is not warmed up completely, perform the ECT sensor inspection.
10. Set the vehicle on the dynamometer or chassis roller.

WARNING: When the dynamometer or chassis roller is operating, there is a possibility that the operator may come into contact with or be caught up in the rotating parts, leading to serious injuries or death. When performing work while the dynamometer or chassis roller is operating, be careful not to come into contact with or be caught up in any of the rotating parts.

11. Drive the vehicle at an engine speed of 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 above step 2.
- If there is no vacuum, inspect the following:
- Wiring harness and connector (Main relay -purge solenoid valve-PCM terminal 2P)
- 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)