Purge Control System Inspection

If simulation function of the M-MDS is used: 

1. Start the engine.
2. Disconnect the vacuum hose between the purge solenoid valve and the charcoal canister.
3. Put the 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 1BC)
     • Purge solenoid vale (stuck open) (See PURGE SOLENOID VALVE INSPECTION article.)
4. Connect the M-MDS to the DLC-2 and verify that the DTC P0443:00 is shown. (See ON-BOARD DIAGNOSTIC TEST article.)
   • Perform the DTC inspection. (See DTC TABLE article.)
5. Access the PCM PID EVAPCP. (See ON-BOARD DIAGNOSTIC TEST article.)
6. Increase the duty value of the purge valve to 50 %  and inspect if the operation sound of the valve is heard.
   • If the operation sound is heard, inspect for the loose or damaged vacuum hose. (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 article.)

7. Warm up the engine to normal operating temperature.
   CAUTION:

   • While performing step 8 with vehicle driving, always operate the vehicle in a safe and lawful manner. 
   • When the M-MDS is used to observe monitor system status while driving, be sure to have another technician with you, or record the data in the M-MDS using the PID/DATA MONITOR AND RECORD capturing function and inspect later. 
8. Monitor the EVAPCP PID using the M-MDS, and drive the vehicle approx. 2,000 rpm for 30 sec. or more  .
   • If the EVAPCP PID is 0 %  , inspect the following PCM PIDs:
     • MAF, APP1, APP2, TP_REL and LOAD

If simulation function of the 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 the 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 1BC)
     • Purge solenoid vale (stuck open) (See PURGE SOLENOID VALVE INSPECTION article.)
4. Connect the M-MDS to the DLC-2 and verify that the DTC P0443:00 is shown. (See ON-BOARD DIAGNOSTIC TEST article.)
   • Perform the DTC inspection. (See DTC TABLE article.)
5. Access the PCM PID EVAPCP and ECT. (See ON-BOARD DIAGNOSTIC TEST article.)
6. Verify that the ECT PID is more than 78 °C {172 °F}. 
   • If the ECT PID reading indicates less than 78 °C {172 °F}  , perform the ECT inspection.
7. 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 caught up in any of the rotating parts. 
8. Drive the vehicle approx. 2,000 rpm for 30 sec. or more  .
   • If there is no vacuum, inspect the following:
     • Wiring harness and connector (Main relay-purge solenoid valve-PCM terminal 1BC)
     • Purge solenoid valve (See PURGE SOLENOID VALVE INSPECTION article.)
     • PCM PIDs MAF, APP1, APP2, TP_REL and LOAD
   • If there is vacuum, inspect the following:
     • Vacuum hose (Purge solenoid valve-Charcoal canister)