LEMON Manuals: Even more car manuals for everyone
Home >> Audi >> 2010 >> S4 Automatic DCT >> Repair and Diagnosis >> External Pages >> Different car >> Section 214 (Diagnostic Trouble Code (DTC) Detecting Criteria (H4DOTC)) >> Diagnostic Trouble Code (DTC) Detecting Criteria >> DTC P0442 Evaporative Emission Control System Leak Detected (Small Leak) >> Outline Of Diagnosis >> 2-inch Diagnosis

2-inch Diagnosis

WARNING: This page is about a different car, the 2012 Subaru Forester. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Evaporative Emission Control System Diagnosis Chart (0.02-Inch Diagnosis)
G04998199Courtesy of SUBARU OF AMERICA, INC.
MODE DESCRIPTION CHART

Mode Mode Description Diagnosis Period
Mode A (0 point compensation) When the pressure in the tank is not near 0 mmHg, wait until it returns to 0 point (near 0 mmHg). 0 - Value of Map 1
Mode B (Negative pressure introduced) Decrease the pressure in the tank to the target value by introducing the intake manifold pressure to the fuel tank. 0 - Value of Map 2
Mode C (Negative pressure maintained) Wait until the tank pressure returns to the target (start level of P2 calculation). 0 - 22820 ms + 0 + Value from Map 2
Mode D (Negative pressure change calculated) Calculate the time it takes for the tank pressure to change to the Mode E shifting pressure. If the tank pressure does not change to the Mode E shifting pressure, make advanced OK judgment. 0 - 0 ms + 200000 ms
Mode E (Evaporation generated amount calculation) Calculate the amount of evaporation (P1). 0 - 0 ms + 200000 ms + Value from Map 3