EVAP Canister Purge Valve and Its Circuit Check

Disconnect vacuum hoses from vacuum pipes.
With ignition switch ON, blow into hose "A". Air should not come out of hose "B".

Fig 1: Blowing Into Hose
Courtesy of SUZUKI OF AMERICA CORP.
If you have SUZUKI scan tool, perform Step a . If not, perform Step b .
1. Using SUZUKI scan tool
  1. Connect SUZUKI scan tool (1) to DLC (2) with ignition switch OFF.
  2. Turn ON EVAP canister purge valve by using SUZUKI scan tool with ignition switch ON.
  3. With step ii row as shown in the figure.
  4. If air should come out of hose "B", EVAP canister purge valve and its circuit are in good condition and reconnect vacuum hoses to vacuum pipes securely. If not, proceed to Step 4 .
    WARNING: Do not suck the air through valve. Fuel vapor inside valve is harmful.
    
    Fig 2: Checking EVAP Canister Purge Valve Circuit
    Courtesy of SUZUKI OF AMERICA CORP.
2. Not using SUZUKI scan tool
  1. Using service wire, connect "C51-3-1" terminal of ECM (PCM) coupler and body ground with ignition switch OFF.
  2. With ignition switch ON, blow into hose "A" from the arrow as shown in the figure.
  3. If air should come out of hose "B", "C51-3-1" terminal to ECM (PCM) connection, EVAP canister purge valve and its circuit are in good condition and reconnect vacuum hoses to vacuum pipes securely. If not, proceed to Step 4 .
  WARNING: Do not suck the air through valve. Fuel vapor Inside valve is harmful.
  
  Fig 3: Blowing Into Hose
  Courtesy of SUZUKI OF AMERICA CORP.
With ignition switch OFF, disconnect coupler from EVAP canister purge valve.
Check resistance between two terminals of EVAP canister purge valve.
If resistance is as specified, proceed to next operation check. If not, replace.
1. EVAP canister purge valve resistance: 28 - 36 ohm at 20°C (68°F)
Fig 4: Checking Resistance Between Terminals Of EVAP Canister Purge Valve
Courtesy of SUZUKI OF AMERICA CORP.
With coupler disconnected, blow into hose "A". Air should not come out of hose "B".
If not, replace EVAP canister purge valve.

Fig 5: Blowing Into Hose
Courtesy of SUZUKI OF AMERICA CORP.
Connect 12V-battery to solenoid purge valve terminals. In this state, blow hose "A".
Air should come out of hose "B".

If check result is as specified above, check EVAP canister purge valve harness.

If not, replace EVAP canister purge valve.

WARNING: Do not suck the air through valve. Fuel vapor inside valve is harmful.

Fig 6: Blowing Into Hose
Courtesy of SUZUKI OF AMERICA CORP.
Connect vacuum hoses.
Connect EVAP canister purge valve coupler securely.