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EC-336 < DTC/CIRCUIT DIAGNOSIS > [QR25DE] P0452 EVAP CONTROL SYSTEM PRESSURE SENSOR Is the inspection result normal? YES >> GO TO 5. NO >> Repair or replace error-detected parts. 5. CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR SIGNAL CIRCUIT 1. Check the continuity between EVAP control system pressure sensor harness connector and ECM har- ness connector. 2. Also check harness for short to ground and to power. YES >> GO TO 6. NO >> Repair or replace error-detected parts. 6. CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR Check the EVAP control system pressure sensor. Refer to EC-333, "Component Inspection" Is the inspection result normal? YES >> GO TO 7. NO >> Replace EVAP control system pressure sensor. Refer to FL-22, "Removal and Installation" . 7. CHECK INTERMITTENT INCIDENT GI-44, "Intermittent Incident" >> INSPECTION END Component Inspection INFOID:0000000011278047 1. CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR 1. Turn ignition switch OFF. 2. Remove EVAP control system pressure sensor with its harness connector connected from EVAP canister. Always replace O-ring with a new one. 3. Install a vacuum pump to EVAP control system pressure sensor. 4. Turn ignition switch ON and check output voltage between ECM harness connector and ground under the following conditions. CAUTION: • Always calibrate the vacuum pump gauge when using it. 2 , -13.53 psi) or pressure over 101.3 kPa (1.033 kg/ cm 2 , 14.69 psi). Is the inspection result normal? YES >> INSPECTION END NO >> Replace EVAP control system pressure sensor. Refer to FL-22, "Removal and Installation" . + − Continuity EVAP control system pres- sure sensor ECM Connector Terminal Connector Terminal B111 2 E16 114 Existed ECM Condition [Applied vacuum kPa (kg/cm 2 , psi)] Voltage Connector + − Terminal E16 114 124 Not applied 0.5 - 4.6 V -26.7 (-0.272, -3.87) 2.1 to 2.5 V lower than above value |