P0455
System/Wiring Diagram:
Terminal Arrangement Of ECM(PCM) Coupler(Viewed From Harness Side):
SYSTEM/CIRCUIT DESCRIPTION
While engine running, ECM (PCM) closes EVAP canister air valve and opens EVAP canister purge valve. If EVAP emission control system is in good condition, EVAP emission control system pressure that detected by fuel pressure sensor becomes down. After that, ECM (PCM) closes EVAP canister purge valve leaving EVAP canister air valve is closed. If EVAP emission control system is in good condition, the fuel tank pressure rises specified rate.
DTC Dectecting Condition And Trouble Area:
DTC CONFIRMATION PROCEDURE
WARNING:
- When performing a road test, select a place where there is no traffic or possibility of a traffic accident and very careful during testing to avoid occurrence of an accident.
- Road test should be carried out with 2 persons, a driver and a tester, on a level road.
NOTE: Check to make sure that the following conditions are satisfied when using this "DTC CONFIRMATION PROCEDURE".
- Intake air temperature: between -14 °C and 70 °C (6.8 °F and 158 °F)
- Atmospheric pressure: higher than 560 mmHg (Altitude: lower than 2790 m (9150 ft))
- The following DTCs are not detected : P0101, P0102, P0103, P0111, P01 12, P0113, P0116, P01 17, P0118, P0131, P0132, P0133, P0134, P0450, P0451, P0461, P0463, P1408, P1410, P1450 and P1451
1. With ignition switch OFF, connect scan tool.
2. Turn ON ignition switch and clear DTC by using scan tool if any.
3. Start engine and warm up to normal operating temperature.
4. Increase vehicle speed to 56 km/h (35 mph) or more.
5. Keep above vehicle speed for 10 min. (Throttle valve operating is kept constant in this step.)
6. Stop vehicle and run engine at idle speed for 1 min.
7. Check DTC and pending DTC by using scan tool.
Step 1 - 7:
DTC TROUBLESHOOTING
EVAP CANISTER PURGE VALVE AND ITS CIRCUIT CHECK
1. Disconnect vacuum hoses from vacuum pipes.
2. With ignition switch ON, blow into hose "A". Air should not come out of hose "B".
3. When using SUZUKI scan tool, perform the following procedure.
a. Connect SUZUKI scan tool (1) to DLC (2) with ignition switch OFF.
b. Turn ON EVAP canister purge valve by using SUZUKI scan tool with ignition switch ON.
In this state, blow hose "A".
Air should come out of hose "B".
If check results are as described above, EVAP canister purge valve and its circuit are in good condition, connect vacuum hoses securely.
If not, proceed to step 5).
WARNING: Do not suck the air through valve. Fuel vapor inside valve is harmful.
4. When not using SUZUKI scan tool, perform the following procedure.
a. Using service wire, connect C51-3-1 terminal of ECM (PCM) coupler and body ground with ignition switch OFF.
b. Turn ON ignition switch.
In this state, blow hose "A".
Air should come out of hose "B".
If check results are as described above and C51-3-1 terminal to ECM connection is OK, EVAP canister purge valve and its circuit are in good condition, connect vacuum hoses securely.
If not, proceed to step 5).
WARNING: Do not suck the air through valve. Fuel vapor inside valve is harmful.
5. With ignition switch OFF, disconnect coupler from EVAP canister purge valve.
6. Check resistance between two terminals of EVAP canister purge valve.
If resistance is as specified, proceed to next operation check.
If not, replace.
Resistance of EVAP canister purge valve:
28 - 36 ohm (at 20 °C (68 °F))
7. With coupler disconnected, blow into hose "A". Air should not come out of hose "B".
If not, replace EVAP canister purge valve.
8. Connect 12 V 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.
9. Connect vacuum hoses.
10. Connect EVAP canister purge valve coupler securely.
EVAP CANISTER AIR VALVE AND ITS CIRCUIT CHECK
REMOVAL
1. Remove fuel tank from vehicle body.
2. Disconnect electric connector from EVAP canister air valve (2).
3. Disconnect air hoses from EVAP canister air valve (2).
4. Remove air valve from EVAP canister (1).
INSPECTION
1. Check EVAP canister air valve for damage.
2. Check resistance of air valve.
If resistance is as specified, proceed to next operation check. If not, replace.
Resistance between two terminals:
25 - 30 ohm (at 20 °C, (68 °F))
Resistance between terminal and valve body:
1 M ohm or higher
3. Blow air into nozzle "A". Air should come out of nozzle "B".
4. Connect 12 V - battery to air valve terminals.
In this state, blow air into nozzle "A". Air should not come out of nozzle "B".
If check result is not as described, replace air valve.
INSTALLATION
1. Install EVAP canister air valve (2) to EVAP canister (1).
2. Connect air hoses and electric connector to EVAP canister air valve (2), and clamp hoses securely.
3. Install fuel tank to vehicle body.
EVAP CANISTER CHECK
WARNING: DO NOT SUCK nozzles on EVAP canister. Fuel vapor inside EVAP canister is harmful.
1. Disconnect vacuum hoses from EVAP canister.
2. When air is blown into tank pipe (1), there should be no restriction of flow through purge pipe (2) and air pipe (3).
3. If operation differs from above description, EVAP canister must be replaced.
4. Connect hoses to canister.
EVAP LEAKAGE CHECK
1. Disconnect purge hose from EVAP canister purge valve.
2. Disconnect hose (1) from EVAP canister air valve and plug air valve end.
3. Connect SUZUKI scan tool to DLC with ignition switch OFF.
4. Apply 3.5 kPa (14.0 inAq, 26.0 mmHg) to purge hose and seal it.
While observing tank pressure displayed on SUZUKI scan tool, after 15 sec., check to make sure that pressure is higher than 3.3 kPa (13.6 inAq, 24.5 mmHg).
5. If check result is satisfactory, fuel tank, purge line and component parts are in good condition.
If not, proceed to next step (leak point check).
LEAK POINT CHECK
Locate pressure leaking point by using soap water or leak detector and repair.