Evaporative System, Checking for Leaks

Evaporative System, Checking for Leaks

Observe all safety precautions: => [ Safety Precautions ] Safety Precautions

View clean working conditions: => [ Clean Working Conditions ] Clean Working Conditions

Perform a preliminary check to verify the condition: => [ Preliminary Check ] Preliminary Check.

Special tools, testers and auxiliary items required

• Smoke tester

• Evaporative and fuel supply system vacuum hose and line routing diagram

Test procedure

- Using a smoke tester, check the evaporative emission system for leaks.

• Always follow the manufacturers directions for the proper installation and operation of the smoke tester being used.

• Secure all hose connections using hose clamps appropriate for the model type.

• Replace seals and gaskets when performing repair work.

If a leak is detected:

- Check the fuel filler cap seal for damage and for proper installation. Replace if necessary.

- Check the seals under the locking flanges and the union nuts are properly tightened on the fuel tank.

- Check all hose connections of the evaporative system and replace or repair any leaking lines.

- Repair or replace any damaged component.

If no leaks are found:

- Erase the DTC memory if a DTC was set.

- Perform a road test to verify repair.

- Generate readiness code.

If a DTC was set and does not return:

- Repair complete, generate readiness code.

If the DTC does return and no leaks are found in the evaporative and fuel supply system:

- Check the DTC memory for any DTC codes pertaining to the evaporative and fuel supply systems. If a DTC is stored, perform the diagnostic test procedure for the suspected component.

Final procedures

After the repair work, the following work steps must be performed in the following sequence:

1. Check the DTC memory. Refer to => [ Diagnostic Mode 03 - Read DTC Memory ] Diagnostic Modes 01 - 0A.

2. If necessary, erase the DTC memory. Refer to => [ Diagnostic Mode 04 - Erase DTC Memory ] Diagnostic Modes 01 - 0A.

3. If the DTC memory was erased, generate readiness code. Refer to => [ Readiness Code ] Monitors, Trips, Drive Cycles and Readiness Codes.