Evaporative System, Checking For Leaks

Observe all safety precautions: SAFETY PRECAUTIONS 

View clean working conditions: CLEAN WORKING CONDITIONS 

Perform a preliminary check to verify the condition: PRELIMINARY CHECK .

Special tools and workshop equipment 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.

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 .
2. If necessary, erase the DTC memory. Refer to DIAGNOSTIC MODE 04 - ERASE DTC MEMORY .
3. If the DTC memory was erased, generate readiness code. Refer to READINESS CODE .