Mazdaspeed6 L4-2.3L Turbo (2006)
Canister Purge Control Valve: Component Tests and General Diagnostics
Purge Control System Inspection
If simulation function of WDS or equivalent 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.
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If there is a vacuum, inspect the following:
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Wiring harness and connectors (Purge solenoid valve - PCM terminal 4U)
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Purge solenoid valve (stuck open)
4. Connect the WDS or equivalent to the DLC-2 and verify that the DTC P0403 is displayed. Perform the DTC inspection. See: Computers and
Control Systems/Testing and Inspection/Diagnostic Trouble Code Descriptions
5. Select the EVAPCP PI D.
6. Increase the duty value of the purge solenoid valve to 50% and inspect if the operation sound of the valve is heard.
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If the operation sound is heard, inspect for loose or damaged vacuum hoses. (Intake manifold - purge solenoid valve - charcoal canister)
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If the operation sound is not heard, perform the purge solenoid valve inspection.
7. Warm up the engine to normal operating temperature.
8. Monitor the EVAPCP PID using the WDS or equivalent, and drive the vehicle approx. 2000 rpm for 30 s or more.
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If the EVAPCP PID is 0%, inspect the following.
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MAF, APP1, APP2, TP_REL and LOAD PIDs.
If simulation function of WDS or equivalent is not used:
9. Start the engine.
10. Disconnect the vacuum hose between the purge solenoid valve and the charcoal canister.
11. Put a finger to the purge solenoid valve and verify that there is no vacuum applied when the engine is cold.
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If there is vacuum, inspect the following:
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Wiring harness and connectors (Purge solenoid valve-PCM terminal, 4U)
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Purge solenoid valve
12. Warm up the engine to the normal operating temperature.
13. Stop the engine.
14. Connect the WDS or equivalent to the DLC-2 and verify that the DTC P0443 is shown. Perform DTC inspection. See: Computers and Control
Systems/Testing and Inspection/Diagnostic Trouble Code Descriptions
15. Turn the ignition switch to the ON position.
16. Select the ECT PID.
17. Verify that the engine coolant temperature is above 60 degrees C {140 degrees F}.
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If the WDS or equivalent indicates that the temperature is below 60 degrees C {140 degrees F}, perform the ECT sensor inspection.
18. 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 contact or be caught up in any of the rotating parts.
19. Drive vehicle at an engine speed to approx. 2000 rpm for 30 s or more.
20. Put a finger to the purge solenoid valve and verify that there is no vacuum applied during Step 2.
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If there is no vacuum, inspect the following:
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Wiring harness and connector (Main relay - purge solenoid valve - PCM terminal 4T)
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Purge solenoid valve
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MAF, APP1, APP2, TP_REL and LOAD PIDs
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If there is vacuum, inspect the following:
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Vacuum hose (Purge solenoid valve - charcoal canister)
