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 2C)
     • Purge solenoid valve (stuck open) (See PURGE SOLENOID VALVE INSPECTION .)
4. Verify that the DTC P0443:00 is displayed. (See ON-BOARD DIAGNOSTIC TEST .)
   • If the DTC P0443:00 is shown, perform the DTC inspection. (See DTC P0443:00 .)
5. Access the PCM PID EVAPCP using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST .)
6. Put a finger to the purge solenoid valve with Step  2 condition and verify that there is vacuum applied when set the present to 100 % duty value of the purge solenoid valve using the EVAPCP PID simulation function.
   • If there is no vacuum, inspect the following:
     • 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, inspect the purge solenoid valve. (See PURGE SOLENOID VALVE INSPECTION .)
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 (See PCM INSPECTION .)

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 a vacuum, inspect the following:
     • Wiring harness and connectors (Purge solenoid valve-PCM terminal 2C)
     • Purge solenoid valve (See PURGE SOLENOID VALVE INSPECTION .)
4. Warm up the engine to the normal operating temperature.
5. Stop the engine.
6. Verify that the DTC P0443:00 is displayed. (See ON-BOARD DIAGNOSTIC TEST .)
   • If the DTC P0443:00 is shown, perform the DTC inspection. (See DTC P0443:00 .)
7. Switch the ignition to ON.
8. Access the PCM PID ECT. (See ON-BOARD DIAGNOSTIC TEST .)
9. Verify that the engine coolant temperature is more than 78 °C {172 °F}  .
   • If the M-MDS indicates less than 78 °C {172 °F}  , perform the ECT sensor inspection. (See ENGINE COOLANT TEMPERATURE (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 vehicle at engine speed approx. 2,000 rpm  for 30 s or more. 
12. Put a finger to the purge solenoid valve and verify that there is no vacuum applied while step  2.
    • If there is no vacuum, inspect the following:
      • Wiring harness and connector (Main relay-Purge solenoid valve-PCM terminal 2C)
      • Purge solenoid valve (See PURGE SOLENOID VALVE INSPECTION .)
      • MAF, APP1, APP2, TP REL and LOAD PIDs (See PCM INSPECTION .)
    • If there is vacuum, inspect the following:
      • Vacuum hose (Purge solenoid valve-Charcoal canister)