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EC-290 < DTC/CIRCUIT DIAGNOSIS > [VQ35DE] P0441 EVAP CONTROL SYSTEM 1. Lift up drive wheels. 2. Start engine (VDC switch OFF) and warm it up to normal operating temperature. 3. Turn ignition switch OFF, wait at least 10 seconds. 4. Turn ignition switch ON. 5. Turn ignition switch OFF, wait at least 10 seconds. 6. Start engine and wait at least 70 seconds. 7. Set voltmeter probes to ECM harness connector terminals under the following conditions. 8. Check EVAP control system pressure sensor value at idle speed and note it. 9. Establish and maintain the following conditions for at least 1 minute. 10. Verify that EVAP control system pressure sensor value stays 0.1 V less than the value at idle speed (mea- sured at step 6) for at least 1 second. Is the inspection result normal? YES >> INSPECTION END NO >> Go to Diagnosis Procedure INFOID:0000000009720019 1. CHECK EVAP CANISTER 1. Turn ignition switch OFF. 2. Check EVAP canister for cracks. Is the inspection result normal? YES-1 >> With CONSULT: GO TO 2. >> Replace EVAP canister. Refer to 2. CHECK PURGE FLOW With CONSULT 1. Disconnect vacuum hose connected to EVAP canister purge volume control solenoid valve at EVAP ser- . 2. Start engine and let it idle. 3. Select “PURG VOL C/V” in “ACTIVE TEST” mode with CONSULT. 4. Touch “Qd” and “Qu” on CONSULT screen to adjust “PURG VOL C/V” opening and check vacuum exist- Is the inspection result normal? YES >> GO TO 7. NO >> GO TO 4. ECM Connector + – Terminal Terminal E16 86 (EVAP control system pressure sensor signal) 96 (Sensor ground) Air conditioner switch ON Head lamp switch ON Rear window defogger switch ON Engine speed Approx. 3,000 rpm Gear position Any position other than P, N or R PURG VOL C/V Vacuum 100% Existed 0% Not existed |