Part 2

2GR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0455: Evaporative Emission Control System Leak Detected (Gross Leak) - Continued

26. INSPECT THROTTLE BODY
(a) Stop the engine.
(b) Disconnect the EVAP hose from the throttle body.
(c) Start the engine.
(d) Confirm that the port of the throttle body has suction with your fingers.
Result:

(e) Reconnect the EVAP hose.
B -- INSPECT THROTTLE BODY
A -- REPLACE EVAP HOSE (THROTTLE BODY - PURGE VSV)
27. CORRECTLY REINSTALL OR REPLACE FUEL TANK CAP
HINT:
- When reinstalling the fuel tank cap, tighten it until a few click sounds are heard.
- When replacing the fuel tank cap, use a fuel tank cap that meets OEM specifications, and tighten it until a few click sounds are heard.

NEXT -- PERFORM EVAPORATIVE SYSTEM CHECK (AUTO OPERATION)
28. REPLACE FUEL TANK CAP ASSEMBLY
HINT: When installing the fuel tank cap, tighten it until a few click sounds are heard.

NEXT -- PERFORM EVAPORATIVE SYSTEM CHECK (AUTO OPERATION)
29. LOCATE EVAP LEAK
(a) Disconnect the vent hose.

(b) Connect the EVAP pressure tester tool to the canister with the adapter.

(c) Pressurize the EVAP system by 3.2 to 3.7 kPa (24 to 28 mmHg).
(d) Apply soapy water to the piping and the connecting parts of the EVAP system.
(e) Look for areas where bubbles appear. This indicates a leak point.
(f) Repair or replace the leak point.
NEXT -- PERFORM EVAPORATIVE SYSTEM CHECK (AUTO OPERATION)
30. REPLACE CHARCOAL CANISTER ASSEMBLY
(a) Replace the charcoal canister assembly Removal.
NOTE: When replacing the canister, check the canister pump module interior and related pipes for water, fuel and other liquids. If liquids are present, check for disconnections and/or cracks in the following: 1) the pipe from the air inlet port to the canister pump module; 2) the canister filter; 3) the fuel tank vent hose.

NEXT -- PERFORM EVAPORATIVE SYSTEM CHECK (AUTO OPERATION)
31. REPLACE VACUUM SWITCHING VALVE NO. 1 (PURGE VSV)

(a) Disconnect the connector and 2 hoses from the purge VSV.
(b) Remove the purge VSV.
(c) Install a new purge VSV.
(d) Reconnect the connector and 2 hoses.
NEXT -- PERFORM EVAPORATIVE SYSTEM CHECK (AUTO OPERATION)
32. REPAIR OR REPLACE HARNESS OR CONNECTOR
NEXT -- PERFORM EVAPORATIVE SYSTEM CHECK (AUTO OPERATION)
33. REPLACE EVAP HOSE (THROTTLE BODY - PURGE VSV)
NEXT -- PERFORM EVAPORATIVE SYSTEM CHECK (AUTO OPERATION)
34. INSPECT THROTTLE BODY
(a) Remove the throttle body Removal.
(b) Check that the EVAP purge port of the throttle body is not clogged. If necessary, replace the throttle body.
NEXT -- PERFORM EVAPORATIVE SYSTEM CHECK (AUTO OPERATION)
35. REPLACE ECM
(a) Replace the ECM Removal.
NEXT -- PERFORM EVAPORATIVE SYSTEM CHECK (AUTO OPERATION)
36. REPAIR OR REPLACE PARTS AND COMPONENTS INDICATED BY OUTPUT DTCS
(a) Repair the malfunctioning areas indicated by the DTCs that had been confirmed when the vehicle was brought in.
NEXT -- Continue to next step.
37. PERFORM EVAPORATIVE SYSTEM CHECK (AUTO OPERATION)
NOTICE:
- In the Evaporative System Check (Automatic Mode), the series of 5 Evaporative System Check steps are performed automatically. It takes a maximum of approximately 18 minutes.
- Do not perform the Evaporative System Check when the fuel tank is more than 90% full because the cut-off valve may be closed, making the leak check of the fuel tank unavailable.
- Do not run the engine in this step.
- When the temperature of the fuel is 35°C (95°F) or more, a large amount of vapor forms and any check results become inaccurate. When performing an Evaporative System Check, keep the temperature below 35°C (95°F).
(a) Clear the DTCs DTC Check / Clear.
(b) On Techstream, select the following menu items: Powertrain / Engine and ECT / Utility / Evaporative System Check / Automatic Mode.
(c) After the Evaporative System Check is completed, check for pending DTCs by selecting the following menu items: Powertrain / Engine and ECT / Trouble Code / Pending.
HINT: If no pending DTC is found, the repair has been successfully completed.

NEXT -- COMPLETED

MONITOR DESCRIPTION

5 hours*1 after the ignition switch is turned off, the electric vacuum pump creates negative pressure (vacuum) in the EVAP (Evaporative Emission) system. The ECM monitors for leaks and actuator malfunctions based on the EVAP pressure.
HINT: *1: If the engine coolant temperature is not below 35°C (95°F) 5 hours after the ignition switch is turned off, the monitor check starts 2 hours later. If it is still not below 35°C (95°F) 7 hours after the ignition switch is turned off, the monitor check starts 2.5 hours later.

*2: If only a small amount of fuel is in the fuel tank, it takes longer for the EVAP pressure to stabilize.

1. P0455: EVAP (Evaporative Emission) gross leak
In operation C, the vacuum pump creates negative pressure (vacuum) in the EVAP system and the EVAP system pressure is measured. If the stabilized system pressure is higher than [second 0.02 inch leak pressure standard x 0.2] (near atmospheric pressure), the ECM determines that the EVAP system has a large leak, illuminates the MIL and sets the DTC (2 trip detection logic).
2. P0456: EVAP very small leak
In operation C, the vacuum pump creates negative pressure (vacuum) in the EVAP system and the EVAP system pressure is measured. If the stabilized system pressure is higher than second 0.02 inch leak pressure standard, the ECM determines that the EVAP system has a small leak, illuminates the MIL and sets the DTC (2 trip detection logic).