P2402

2AZ-FXE ENGINE CONTROL: SFI SYSTEM: P043E, P043F, P2401, P2402, P2419: Evaporative Emission System Reference Orifice Clog Up


DTC SUMMARY





HINT
The 0.02 inch orifice is located inside the canister pump module.

DESCRIPTION

The circuit description can be found in the EVAP (Evaporative Emission) System EVAP System.

HINT
Unit expression

- (kPa-a [mmHg-a]) denotes absolute pressure.
- (kPa-g [mmHg-g]) denotes gauge pressure (relative pressure).
- On the Techstream, convert the unit of measurement according to the inspection procedure.

MONITOR DESCRIPTION

5 hours*1 after the power switch is turned off, the leak detection pump creates negative pressure (vacuum) in the EVAP (Evaporative Emission) system. The hybrid vehicle control ECU 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 power 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 power 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.









The leak detection pump creates negative pressure through the reference orifice. When the system is normal, the EVAP pressure is in 97 to 100 kPa-a (728 to 750 mmHg-a)* and saturated within a minute.

If not, the hybrid vehicle control ECU interprets this as a malfunction. The hybrid vehicle control ECU will illuminate the MIL and set DTC if this malfunction is detected in consecutive driving cycle.

*: Typical valve

MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS





TYPICAL MALFUNCTION THRESHOLDS





MONITOR RESULT

Refer to Checking Monitor Status Mode 6 Data.

CONFIRMATION DRIVING PATTERN





NOTICE:
- The Evaporative System Check (Automatic Mode) consists of 5 steps performed automatically by the Techstream. 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 fuel tank leak check unavailable.
- Do not run the engine during this operation.
- 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 the Evaporative System Check, keep the fuel temperature below 35°C (95°F).

1. Connect the Techstream to the DLC3.

2. Turn the power switch on (IG) and turn the Techstream on.

3. Clear the DTCs Reading and Clearing Diagnostic Trouble Codes.

4. Turn the power switch off and wait for at least 30 seconds.

5. Turn the power switch on (IG) and turn the Techstream on.

6. Enter the following menus: Powertrain / Engine and ECT / Utility / Evaporative System Check / Automatic Mode [A].

7. After "Evaporative System Check" is completed, check All Readiness by entering the following menus: Powertrain / Engine and ECT / Utility / All readiness.

8. Input the DTC: P043E, P043F, P2401, P2402 or P2419.

9. Check the DTC judgment result [B].





HINT
If the judgment result shows ABNORMAL, the system has a malfunction.

INSPECTION PROCEDURE

Refer to the EVAP System EVAP System.