P0442
P0442 EVAP Control SystemOn Board Diagnosis Logic
This diagnosis detects leaks in the EVAP purge line using engine intake manifold vacuum. If pressure does not increase, the ECM will check for leaks in the line between the fuel tank and EVAP canister purge volume
control solenoid valve, under the following Vacuum test conditions. The EVAP canister vent control valve is closed to shut the EVAP purge line off. The EVAP canister purge volume control solenoid valve will then be opened to depressurize the EVAP purge line using intake manifold vacuum. After this occurs, the EVAP canister purge volume control solenoid valve will be closed.
P0442:
CAUTION:
- Use only a genuine fuel filler cap as a replacement. If an incorrect fuel filler cap is used, the MIL may illuminate.
- If the fuel filler cap is not tightened properly, the MIL may illuminate.
- Use only a genuine rubber tube as a replacement.
DTC Confirmation Procedure
NOTE: If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next step.
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.
TESTING CONDITION:
- Perform "DTC work support" when the fuel level is between 1/4 and 3/4 full, and vehicle is placed on flat level surface.
- Always perform test at a temperature of 0 to 30 °C (32 to 86 °F).
WITH SDT
1. Turn ignition switch ON.
2. Turn ignition switch OFF and wait at least 10 seconds.
3. Turn ignition switch ON and select "Data list" mode with SDT.
4. Check that the following conditions are met.
COOLAN TEMP/S: 0 - 70 °C (32 - 158 °F)
INT/A TEMP SE: 0 - 30 °C (32 - 86 °F)
5. Select "EVP SML LEAK P0442/P1442" of "EVAPORATIVE SYSTEM" in "DTC work support" mode with SDT.
Follow the instructions displayed.
NOTE: If the engine speed cannot be maintained within the range displayed on the SDT screen, go to [Basic Inspection]. Basic Inspection
6. Check that "OK" is displayed.
If "NG" is displayed, refer to [P0442 EVAP Control System].
NOTE: Check that EVAP hoses are connected to EVAP canister purge volume control solenoid valve properly.
WITH GST
NOTE: Be sure to read the explanation of Driving Pattern before driving vehicle.
1. Start engine.
2. Drive vehicle according to Driving Pattern.
3. Stop vehicle.
4. Turn ignition switch OFF, wait at least 10 seconds.
5. Turn ignition switch ON.
6. Turn ignition switch OFF, wait at least 10 seconds and then turn ON.
7. Select Service $07 with GST.
- If P0442 is displayed on the screen, go to [P0442 EVAP Control System].
- If P0441 is displayed on the screen, go to [P0441 EVAP Control System]. P0441
Diagnosis Procedure
Step 1-6:
Step 7:
Step 8-13:
Step 14-19:
Step 20-25:
Component Inspection
FUEL TANK VACUUM RELIEF VALVE (BUILT INTO FUEL FILLER CAP)
1. Wipe clean valve housing.
2. Check valve opening pressure and vacuum.
Pressure: 15.3 - 20.0 kPa (0.156 - 0.204 kg/cm2, 2.22 - 2.90 psi)
Vacuum: -6.0 to -3.3 kPa (-0.061 to -0.034 kg/cm2, -0.87 to -0.48 psi)
3. If out of specification, replace fuel filler cap as an assembly.
CAUTION: Use only a genuine fuel filler cap as a replacement. If an incorrect fuel filler cap is used, the MIL may illuminate.
DRAIN FILTER
1. Check visually for insect nests in the drain filter air inlet.
2. Check visually for cracks or flaws in the appearance.
3. Check visually for cracks or flaws in the hose.
4. Blow air into port A and check that it flows freely out of port B.
5. Block port B.
6. Blow air into port A and check that there is no leakage.
7. If NG, replace drain filter.