Inspection Procedure 25
INSPECTION PROCEDURE 25: Pressure Test of the Evaporative System FailureCOMMENT
- 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, Emission Control System - Evaporative Emission Purge Solenoid Check in Evaporative Emission system/Purge Control Solenoid.
Q: Is the evaporative emission purge solenoid normal?
YES: Go to Step 2.
NO: Repair or replace. Then confirm that the malfunction symptom is eliminated.
STEP 2. Check the evaporative emission ventilation solenoid.
Refer to Emission Control System - Evaporative Emission Ventilation Solenoid Check in Evaporative Emission system/Leak Detection Solenoid.
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. Then confirm that the malfunction symptom is eliminated.