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ON-BOARD DIAGNOSTIC [L3 WITH TC] 01-02–147 01-02 DTC P0456[L3 WITH TC] id010239807900 Diagnostic procedure DTC P0456 Evaporative emission control system leak detected (very small leak) DETECTION CONDITION • PCM measures the pump load current (EVAP line pressure) when a specified period has passed after the EVAP system is sealed when monitoring conditions are met. If the load does not reach the reference load MONITORING CONDITION — IG switch OFF — IAT: 5— 35 °C {40— 95 °F} — Battery voltage: 11— 20 V — Atmospheric pressure: 72.2 kPa {542 mmHg, 21.3 inHg} or above — Fuel tank level: 15— 85% Diagnostic support note • This is an intermittent monitor (Evaporative system monitor). • MIL illuminates if the PCM detects the above malfunction condition in two consecutive drive cycles or in one drive cycle while the DTC for the same malfunction has been stored in the PCM. • PENDING CODE is available if the PCM detects the above malfunction condition during the first drive cycle. • FREEZE FRAME DATA is available. • DTCs are stored in the PCM memory. • DIAGNOSTIC MONITORING TEST RESULT is available. POSSIBLE CAUSE • Purge solenoid valve malfunction • EVAP system leak detection pump malfunction • Charcoal canister malfunction • Fuel cap malfunction • Fuel tank malfunction • Fuel pump unit poor seal • EVAP hose damaged or loose • EVAP pipe damaged STEP INSPECTION ACTION 1 VERIFY FREEZE FRAME DATA AND • Have the FREEZE FRAME DATA and DIAGNOSTIC MONITORING TEST RESULTS Yes Go to the next step. No Record FREEZE FRAME DATA and DIAGNOSTIC 2 VERIFY RELATED REPAIR INFORMATION • Check for related Service Bulletins and/or on- line repair information availability. • Is any related repair information available? Yes Perform the repair or diagnosis according to the available • If the vehicle is not repaired, go to the next step. No Go to the next step. 3 VERIFY RELATED PENDING CODE OR • Turn the ignition switch off then ON position (Engine off). • Verify related PENDING CODE or stored DTCs. • Are other DTC present? Yes Go to the appropriate DTC inspection. No Go to the next step. 4 CLASSIFY INTERMITTENT CONCERN OR • Perform the evaporative system leak inspection. • Does the system test result fail? Yes Go to the next step. No Intermittent concern exists. Inspect the purge solenoid 1871-1U-06B(01-02).fm 147 ページ 2006年3月15日 水曜日 午前10時32分 |