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EC-310 < DTC/CIRCUIT DIAGNOSIS > [HR16DE] P0451 EVAP CONTROL SYSTEM PRESSURE SENSOR 4. Also check harness for short to ground and to power. YES >> Perform the trouble diagnosis for power supply circuit. NO >> Repair or replace error-detected parts 4. CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR GROUND CIRCUIT 1. Turn ignition switch OFF. 2. Disconnect ECM harness connector. 3. Check the continuity between EVAP control system pressure sensor harness connector and ECM har- ness connector. 4. Also check harness for short to power. 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-310, "Component Inspection" Is the inspection result normal? YES >> Check intermittent incident. Refer to GI-41, "Intermittent Incident" . NO >> Replace EVAP control system pressure sensor. Refer to FL-19, "Removal and Installation" . Component Inspection INFOID:0000000009020805 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. EVAP control system pressure sensor ECM Continuity Connector Terminal Connector Terminal B3 3 F11 71 Existed EVAP control system pressure sensor ECM Continuity Connector Terminal Connector Terminal B3 1 F11 68 Existed EVAP control system pressure sensor ECM Continuity Connector Terminal Connector Terminal B3 2 F11 43 Existed |