EVAP Canister Purge System Inspection

WARNING: Do not apply vacuum using your mouth; otherwise harmful fuel vapor can be breathed in.

CAUTION: Do not apply vacuum of more than -67 kPa (-0.68 kgf/cm2, -9.72 psi, -0.67 bar); otherwise EVAP canister purge valve could be damaged.

Prepare to operate EVAP canister purge valve as follows.
- Method using SUZUKI scan tool:
  1. Connect SUZUKI scan tool to DLC (1) with ignition switch turned to OFF.
    Special Tool
    
    (A): SUZUKI scan tool (SUZUKI-SDT)
    
    Fig 1: Connecting Scan Tool To DLC
    Courtesy of SUZUKI OF AMERICA CORP.
  2. Turn ignition switch to ON, clear DTC(s) and select "Engine/Active Test" mode on SUZUKI scan tool.
    NOTE:
    EVAP canister purge valve is operated using scan tool as follows.
    
    To turn OFF EVAP canister purge valve: 0%
    
    To turn ON EVAP canister purge valve: 100%
- Method using service wire:
  NOTE: Before performing this check, be sure to read PRECAUTIONS FOR ECM CIRCUIT INSPECTION .
  1. Connect special tool (ECM check harness) between ECM and ECM connector. See INSPECTION OF ECM AND ITS CIRCUITS .
    NOTE:
    Operate EVAP canister purge valve using service wire as follows.
    
    To turn ON EVAP canister purge valve:
    Connect "C37-7" terminal and vehicle body ground [b]
    
    To turn ON EVAP canister purge valve:
    Disconnect "C37-7" terminal and vehicle body ground [a]
    Fig 2: Disconnecting C37-7 Terminal And Vehicle Body Ground
    Courtesy of SUZUKI OF AMERICA CORP.
Disconnect vacuum hose (2) from intake manifold and purge hose from EVAP canister purge valve (1).
Install special tool to vacuum hose.
Special Tool

(A): 09917-47011
Check EVAP canister purge valve operation.
If faulty condition is found, check the following.
- Wire harness and connections
- EVAP canister purge valve: See EVAP CANISTER PURGE VALVE INSPECTION .
- Vacuum hoses
  1. Check that vacuum of -60 kPa (-0.6 kgf/cm2, -8.7 psi, -0.6 bar) can be applied when EVAP canister purge valve is turned OFF [A].
  2. Check that no vacuum can be applied when EVAP canister purge valve is turned ON [B].
    
    Fig 3: Checking EVAP Canister Purge Valve Operation
    Courtesy of SUZUKI OF AMERICA CORP.