Diagnostic Aids

To help locate intermittent leaks, use the Evaporative Emissions System Tester (J 41413-20) to introduce smoke into the EVAP system. Move all EVAP components while observing smoke with the High Intensity White Light (J 41413-SPT).

A temporary blockage in EVAP canister purge valve, purge pipe or EVAP canister could cause an intermittent condition. Inspect and repair any restriction in the EVAP system.

To improve the visibility of the smoke exiting the EVAP system, observe the suspected leak area from different angles with the High Intensity White Light (J 41413-SPT).

Reviewing Freeze Frame/Failure Records vehicle mileage since diagnostic test last failed may help determine how often condition that caused DTC to be set occurs. This may assist in diagnosing condition.