EVAP Canister Vent Valve and Its Circuit Inspection

CAUTION: When checking EVAP canister vent valve, do not blow compressed air into its inlet or outlet nozzle. Compressed air could damage EVAP canister vent valve and cause fuel vapor leaks.

Prepare to operate EVAP canister vent valve as follows.
1. When using SUZUKI scan tool:
  1. Connect SUZUKI scan tool to DLC with ignition switch OFF.
  2. Turn ON ignition switch, clear DTC and select "MISC. TEST" mode on SUZUKI scan tool.
    Special tool
    
    SUZUKI scan tool
    
    Fig 1: Connecting SUZUKI Scan Tool To DLC
    Courtesy of SUZUKI OF AMERICA CORP.
2. When not using SUZUKI scan tool:
  1. Turn ignition switch ON.
  2. Using service wire, ground "G04-5" terminal of ECM connector (valve ON) (2) and unground it (valve OFF) (1).
    
    Fig 2: Grounding "G04-5" Terminal
    Courtesy of SUZUKI OF AMERICA CORP.
Check EVAP canister vent valve for operation and clog when valve is switched ON and OFF by using SUZUKI scan tool or service wire.
If check result is not described, check vent valve wire harness and connections.

EVAP canister vent valve specification

[A] Valve OFF: When blowing breath into nozzle (1), breath should come out of nozzle (2).

[B] Valve ON: When blowing breath into nozzle (1), breath should not come out of nozzle (2).

Fig 3: Checking EVAP Canister Vent Valve For Operation & Clog

Courtesy of SUZUKI OF AMERICA CORP.