Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Purge Control System Inspection
If simulation function of M-MDS is used:
- Start the engine.
- Remove the plug hole plate. (See PLUG HOLE PLATE REMOVAL/INSTALLATION .)
- Disconnect the vacuum hose between the purge solenoid valve and the charcoal canister.
- 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 1AI (Without coolant control valve)/1AW (With coolant control valve))
- Purge solenoid valve (stuck open) (See PURGE SOLENOID VALVE INSPECTION .)
- If there is a vacuum, inspect the following:
- Connect the M-MDS to the DLC-2 and verify that DTC P0443:00 is displayed. (See ON-BOARD DIAGNOSTIC TEST
.)
- Perform the DTC inspection. (See DTC P0443:00 .)
- Select the EVAPCP simulation item. (See ON-BOARD DIAGNOSTIC TEST .)
- 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 .)
- Warm up the engine to normal operating temperature.
- Monitor the EVAPCP PID using the M-MDS, and drive the vehicle approx. 2, 000 RPM for 30 s or more. (See ON-BOARD DIAGNOSTIC TEST
.)
- If the EVAPCP PID is 0 %, inspect the following PIDs:
- MAF, APP1, APP2, TP_REL and LOAD PIDs (See PCM INSPECTION .)
- If the EVAPCP PID is 0 %, inspect the following PIDs:
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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