EVAP System, Checking For Leaks

The following procedure is used to diagnose EVAP System leaks.

Special tools and workshop equipment required

Leak checking

-- Using a Smoke tester, check the Evaporative Emission (EVAP) canister system for leaks.

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

If a leak is detected:

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

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

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

-- Check that the seal under the locking flange is properly tightened on the fuel tank.

-- Secure all hose connections using appropriate fittings for the model type.

-- Replace seals and gaskets when performing repair work.

-- Repair or replace any damaged component.

If no leaks are found in the EVAP system:

-- Erase the DTC memory if a DTC was set. Refer to DIAGNOSTIC MODE 04 - ERASE DTC MEMORY .

-- Perform a road test to verify repair.

If a DTC was set and does not return:

Diagnosis complete. Generate readiness code. Refer to READINESS CODE .

If the same DTC does return and no leaks are found in the EVAP system:

-- Check for any related TSB's.

-- Perform the diagnostic test procedure for the suspected component.