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P0452 EVAP CONTROL SYSTEM PRESSURE SENSOR EC-381 < DTC/CIRCUIT DIAGNOSIS > [MR FOR NISMO RS MODELS] C D E F G H I J K L M A EC N P O Diagnosis Procedure INFOID:0000000012197914 1. CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR CONNECTOR FOR WATER 1. Turn ignition switch OFF. 2. Disconnect EVAP control system pressure sensor harness connector. 3. Check sensor harness connector for water. Is the inspection result normal? YES >> GO TO 2. NO >> Repair or replace harness connector. 2. CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR POWER SUPPLY 1. Turn ignition switch ON. 2. Check the voltage between EVAP control system pressure sensor harness connector and ground. Is the inspection result normal? YES >> GO TO 4. NO >> GO TO 3. 3. CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR POWER SUPPLY 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 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. Water should not exist. + − Voltage (Approx.) EVAP control system pressure sen- sor Connector Terminal B22 3 Ground 5 V + − Continuity EVAP control system pres- sure sensor ECM Connector Terminal Connector Terminal B22 3 F25 23 Existed + − Continuity EVAP control system pres- sure sensor ECM Connector Terminal Connector Terminal B22 1 F25 12 Existed |