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EC-306 < DTC/CIRCUIT DIAGNOSIS > [VQ35DE] P0452 EVAP CONTROL SYSTEM PRESSURE SENSOR P0452 EVAP CONTROL SYSTEM PRESSURE SENSOR DTC Logic INFOID:0000000009651140 DTC DETECTION LOGIC DTC CONFIRMATION PROCEDURE 1. PRECONDITIONING If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct- Turn ignition switch OFF and wait at least 10 seconds. 2. Turn ignition switch ON. 3. Turn ignition switch OFF and wait at least 10 seconds. TESTING CONDITION: ° C (41 ° F) or more. >> GO TO 2. 2. PERFORM DTC CONFIRMATION PROCEDURE With CONSULT 1. Start engine and warm it up to normal operating temperature. 2. Turn ignition switch OFF and wait at least 10 seconds. 3. Turn ignition switch ON. 4. Turn ignition switch OFF and wait at least 10 seconds. 5. Turn ignition switch ON. 6. Select “DATA MONITOR” mode with CONSULT. 7. Check that “FUEL T/TMP SE” is more than 0 ° C (32 ° F). 8. Start engine and wait at least 20 seconds. 9. Check 1st trip DTC. With GST 1. Start engine and warm it up to normal operating temperature. 2. Set voltmeter probes to ECM harness connector terminals under the following conditions. 3. Check that the voltage is less than 4.2 V. 4. Turn ignition switch OFF and wait at least 10 seconds. 5. Turn ignition switch ON. 6. Turn ignition switch OFF and wait at least 10 seconds. 7. Start engine and wait at least 20 seconds. 8. Check 1st trip DTC. Is 1st trip DTC detected? DTC No. Trouble diagnosis name DTC detecting condition Possible cause P0452 EVAP control system An excessively low voltage from the sensor is • Harness or connectors (The sensor circuit is open or shorted.) • EVAP control system pressure sensor ECM Connector + – Terminal Terminal E16 111 (Fuel tank temperature sensor signal) 120 (Sensor ground) |