Using Vacuum Pump

Whole system inspection
1. Disconnect the vacuum hose between the purge solenoid valve and the catch tank from the purge solenoid valve.
2. Insert hose on the vacuum pump.
3. Connect WDS or equivalent to DLC-2.
4. Turn ignition key to ON (Engine OFF).
5. Close the canister drain cut valve (CDCV) using ON BOARD DEVICE CONTROL function.

NOTE:
- The CDCV is closed for 10 minutes unless the following any action is done:
- The engine is started.
- The ignition key is turned to OFF.
- The fuel tank pressure sensor signal exceeds 6.43 kPa {48.3 mmHg, 1.9 inHg}.

6. Apply 1.7 kPa vacuum and monitor FTP output voltage.
7. Verify that the voltage holds at the specified readings for a minimum of 2 minutes.
- If the voltage does not hold, inspect the fuel tank pressure sensor.
- If the fuel tank pressure sensor is okay, carry out the "Inspection from charcoal canister to fuel tank".

Inspection from charcoal canister to fuel tank
1. Inspect for loose and wrongly connected hoses between the charcoal canister and the fuel tank.
2. Disconnect the vacuum hose between the charcoal canister and the fuel tank from the charcoal canister.
3. Insert hose on the vacuum pump.
4. Apply 1.7 kPa vacuum.
5. Verify that the vacuum holds at the specified readings for a minimum of 2 minutes.
- If the vacuum does not hold, inspect the fuel tank, related vacuum hoses and fuel-filler cap.
- If the the fuel tank, related vacuum hoses and fuel-filler cap are okay, carry out the "Inspection from charcoal canister to fuel tank".

Inspection from charcoal canister to purge solenoid valve
1. Inspect for loose and wrongly connected hoses between the charcoal canister and the purge solenoid valve.
2. Disconnect the vacuum hose between the charcoal canister and the catch tank from the charcoal canister.
3. Insert hose on the vacuum pump.
4. Apply 3.3 kPa {25 mmHg, 1.0 inHg} vacuum. Vacuum should hold at the specified readings for a minimum of 2 minutes.
- If the vacuum does not hold, inspect the following:
- Catch tank for plugging, damages and pinhole using vacuum pump
- Purge solenoid valve
- Charcoal canister for damage and pinhole.
- CDCV for damage and leakage.
- Detached, incorrectly installed or cracked hose from charcoal canister to CDCV