Inspection Procedure 20

Inspection Procedure 20: Pressure Test Of The Evaporative System Failure

COMMENT
- The test fails if there is a leak from the fuel tank or vapor line.

TROUBLESHOOTING HINTS (The most likely causes for this case:)
- Loose fuel tank filler tube cap.
- Broken seal in fuel tank, vapor line evaporative emission canister.

DIAGNOSIS

STEP 1. Check the evaporative emission purge solenoid.

Refer to Evaporative Emission Purge Solenoid Check.

Q: Is the evaporative emission purge solenoid normal?

YES : Go to Step 2.

NO : Repair or replace it. Then confirm that the malfunction symptom is eliminated.

STEP 2. Check the evaporative emission ventilation solenoid.

Refer to Evaporative Emission Ventilation Solenoid Check.

Q: Is the evaporative emission ventilation solenoid normal?

YES : Check the following items, and repair or replace the defective items.
a. Check for leaks from the vapor line or evaporative emission canister.
b. Check for leaks from the fuel tank.

Then confirm that the malfunction symptom is eliminated.

NO : Repair or replace it. Then confirm that the malfunction symptom is eliminated.