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EC-284 < COMPONENT DIAGNOSIS > [QR25DE] P0451 EVAP CONTROL SYSTEM PRESSURE SENSOR P0451 EVAP CONTROL SYSTEM PRESSURE SENSOR Description INFOID:0000000004211517 The EVAP control system pressure sensor detects pressure in the purge line. The sensor output voltage to the ECM increases as pres- sure increases. DTC Logic INFOID:0000000004211518 DTC DETECTION LOGIC DTC CONFIRMATION PROCEDURE 1. PRECONDITIONING TESTING CONDITIONING: Perform “DTC CONFIRMATION PROCEDURE” when the fuel level is between 1/4 and 3/4 full, and vehi- cle is placed on flat level surface. If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct- ing the next test. 1. 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. >> GO TO 2. 2. PERFORM DTC CONFIRMATION PROCEDURE 1. Turn ignition switch OFF and wait at least 10 seconds. 2. Activate “INSPECTION MODE 1” ( ) to start engine, and wait at least 100 seconds. NOTE: Do not depress accelerator pedal even slightly. 3. Check 1st trip DTC. YES >> Go to NO >> GO TO 3. 3. PERFORM DTC CONFIRMATION PROCEDURE 1. Turn ignition switch OFF and wait at least 10 seconds. 2. Activate “INSPECTION MODE 1” ( ) to start engine, and wait at least 100 seconds. PBIB3370E DTC No. Trouble diagnosis name DTC detecting condition Possible cause P0451 EVAP control system ECM detects a sloshing signal from the EVAP • Harness or connectors (EVAP control system pressure sensor • EVAP control system pressure sensor |