Nissan Evaporative (EVAP) Emission Control System Cleaning Procedure Service Bulletin

If the EVAP canister leaks (or has leaked) charcoal, it must be replaced. In addition to replacing the canister, the entire EVAP emission control system must be cleaned to remove charcoal particles released by the leaking canister. To clean the EVAP emission control system, use the service procedure starting on page 3.
NOTE: There are two different types of EVAP Purge Volume Control Valves (i.e., the duty cycle type and the step motor type). Depending on the valve type, different hoses need to be disconnected (from the valve) to perform the cleaning procedure (discussed later in this bulletin). Refer to Figures 1 and 2 to determine the system variation you are working with.
SERVICE PROCEDURE
IMPORTANT: Before disconnecting any hose, make sure you mark the hose so it can be correctly re-installed later. If a hose is incorrectly re-installed, the MIL will come on.
1. Disconnect the vacuum hose from the EVAP System Pressure Sensor (see Figure 3).
CAUTION: The vacuum hose must be disconnected from the Pressure Sensor to prevent it from being damaged.
2. Disconnect the Purge hose from the EVAP canister port labeled “Purge” (see Figure 3).
3. Disconnect the hose from the EVAP Purge Volume Control Valve (or Purge Cut Valve, if equipped). Refer to Figures 1, 2, and 4 to determine which hose to disconnect based on the type of Purge Volume Control Valve on the vehicle (i.e., duty cycle or step motor type).
IMPORTANT: Before disconnecting any hose, make sure you mark the hose so it can be correctly re-installed later. If a hose is incorrectly re-installed, the MIL will come on.

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