Switch, Evaporative Emissions System Monitor: Removal: Removal

The EVAP System Integrity Monitor (ESIM) switch is attached to the EVAP canister and is usually not serviceable. Replace the switch by replacing the EVAP canister. See EVAP canister REMOVAL  and INSTALLATION  .

If servicing separately, refer to the following:

Fig 1: Locating ESIM Switch

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The ESIM switch (2) is located on the EVAP canister (1) The illustration displays a typical EVAP Canister and a typical ESIM switch. 

Fig 2: EVAP Canister Vapor Hose

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1. Remove both plastic lines from switch by folding line tabs (2).
   Fig 3: ESIM Switch, O-Ring & EVAP Canister Opening

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2. Disconnect electrical connector at switch.
3. Clean any dirt from ESIM switch and its lines.
   Fig 4: Locating Lock Tab

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4. A lock tab (see arrow in illustration) is used on the back of the switch. Push lock tab towards switch while rotating switch counterclockwise 1/4 turn for removal.
5. The fresh air lines and hoses from the ESIM must have a clear opening to the atmosphere. Check the fresh air lines, including the fresh air filter, for obstructions or restrictions at the ESIM. Also check the routing to the exit to atmosphere. If a restriction is present, the system will not allow free flow passage of clean air, and an early shut off of the fuel fill nozzle may occur during fuel fill.