Outline Of Diagnosis
WARNING: This page is about a different variant/trim than selected.
Check if there is a leakage in fuel system or not, and perform the function diagnosis of valve.
In this system diagnosis, checking for leakage and valve function is conducted by changing the fuel tank pressure, and monitoring the pressure change using the fuel tank pressure sensor. 0.04 inch diagnosis is performed in the order of mode Z, mode A, mode B, mode C, mode D and mode E, and 0.02 inch diagnosis is performed in the order of mode Y, mode A, mode B, mode C, mode D and mode E.
- 10.04-inch Diagnosis MODE DESCRIPTION - 10.04-INCH DIAGNOSIS
Mode Mode Description Diagnosis Period Mode Z (Purge control solenoid valve close trouble diagnosis) Carry out purge control solenoid valve close trouble diagnosis according to tank pressure change amount after the diagnosis has started. 3 - 16 seconds Mode A (Estimated evaporation amount) Calculate the tank pressure change amount (P1). 7 - 15.5 seconds Mode B (Sealed negative pressure, large leakage judgment) Introduce the intake manifold pressure to the fuel tank and reduce the tank pressure to the desired value.
If the tank pressure cannot be reduced, it is diagnosed as large leakage.5 - 35 seconds Mode C (Pressure increase check, advanced OK judgment) Wait until the tank pressure becomes P2 calculation start pressure. If the tank pressure does not become the value, make advanced OK judgment. 4 - 16 seconds Mode D (Negative pressure variation measurement, evaporation leakage diagnosis) Calculate the tank pressure variation (P2), and obtain the diagnostic value using P1 of Mode 1. Perform the evaporation leakage diagnosis using the diagnostic value. 7 - 15.5 seconds - 0.02-inch Diagnosis MODE DESCRIPTION - 0.02-INCH DIAGNOSIS
Mode Mode Description Diagnosis Period Mode Y (Tank pressure stabilization) Return the tank pressure to atmosphere. 0.1 seconds Mode A (Estimated evaporation amount) Calculate the tank pressure change amount (P1). 26 seconds Mode B (Negative pressure sealed) Introduce the intake manifold pressure to the fuel tank and reduce the tank pressure to the desired value. 10 - 62 seconds Mode C (Pressure increase check, advanced OK judgment) Wait until the tank pressure becomes P2 calculation start pressure. If the tank pressure does not become the value, make advanced OK judgment. 5 - 20 seconds Mode D (Negative pressure variation measurement, evaporation leakage diagnosis) Calculate the tank pressure variation (P2), and obtain the diagnostic value using P1 of Mode 1. Perform the evaporation leakage diagnosis using the diagnostic value. 22 seconds - Mode Table for Evaporative Emission Control System Diagnosis
- 0.04-inch Diagnosis EVAPORATIVE EMISSION CONTROL SYSTEM DIAGNOSIS - 0.04-INCH
Mode Behavior of tank internal pressure under normal conditions Diagnostic item DTC Mode Z Nearly same as atmospheric pressure [equivalent pressure of 0 kPa (0 mmHg, 0 inHg)] Purge control solenoid valve open trouble diagnosis. P0457 Mode A Pressure is in proportion to amount of evaporation gas occurrence. Mode B Negative pressure is formed due to intake manifold negative pressure Large leakage judgment P0457 Mode C Target pressure is reached. Mode D Pressure change is small. Evaporation system is judged to have large leak [1.0 mm (0.04 in)]. P0442 - 0.02-inch Diagnosis EVAPORATIVE EMISSION CONTROL SYSTEM DIAGNOSIS - 0.02-INCH
Mode Behavior of tank internal pressure under normal conditions Diagnostic item DTC Mode Y Return to atmosphere Mode A Pressure is in proportion to amount of evaporation gas occurrence. Mode B Negative pressure is formed due to intake manifold negative pressure Mode C Target pressure is reached. Mode D Pressure change is small. P2 measurement of small leak in system. Evaporation system is judged to have small leak [0.5 mm (0.02 in)]. P0456