M20F-FXS, M20G-FXS ENGINE CONTROL SFI SYSTEM P142200 Evaporative Emission Fuel Tank (Small Leak) P142300 Evaporative Emission Fuel Tank (Gross Leak)
DTC SUMMARY
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Note |
|---|---|---|---|---|---|
| P142200 | Evaporative Emission Fuel Tank (Small Leak) | Leak detection pump creates negative pressure (vacuum) in fuel tank and fuel tank pressure is measured. Reference pressure is measured at the start and at end of leak check.
If stabilized pressure is higher than third reference pressure, ECM determines that fuel tank has a small leak. |
·
EVAP leak (fuel tank - fuel vapor-containment valve) ·
Fuel vapor-containment valve ·
Connector/wire harness (fuel vapor-containment valve - ECM) ·
ECM |
Comes on | SAE Code: P1422 |
| P142300 | Evaporative Emission Fuel Tank (Gross Leak) | Leak detection pump creates negative pressure (vacuum) in fuel tank and fuel tank pressure is measured. Reference pressure is measured at the start and at end of leak check.
If stabilized pressure is higher than [third reference pressure x 0.2], ECM determines that fuel tank has a large leak. |
·
EVAP leak (fuel tank - fuel vapor-containment valve) ·
Fuel vapor-containment valve ·
Connector/wire harness (fuel vapor-containment valve - ECM) ·
ECM |
Comes on | SAE Code: P1423 |
| DTC No. | Monitoring Item | Detection Timing | Detection Logic | SAE Code |
|---|---|---|---|---|
| P142200 | Fuel tank small leak | EVAP monitoring
(Ignition switch off) |
2 trip | P1422 |
| P142300 | Fuel tank gross leak | P1423 |
DESCRIPTION
Refer to EVAP (evaporative emission) System.
MONITOR DESCRIPTION
P142200: Fuel tank small leak
In operation G, the leak detection pump creates negative pressure (vacuum) in the fuel tank and the fuel tank pressure is measured. If the stabilized system pressure is higher than the third reference pressure, the ECM determines that the fuel tank has a small leak. The ECM illuminates the MIL and stores the DTC (2 trip detection logic).
P142300: Fuel tank gross leak
In operation G, the leak detection pump creates negative pressure (vacuum) in the fuel tank and the fuel tank pressure is measured. If the stabilized system pressure is higher than [third reference pressure x 0.2] (near atmospheric pressure), the ECM determines that the fuel tank has a large leak. The ECM illuminates the MIL and stores the DTC (2 trip detection logic).
MONITOR STRATEGY
| Required Sensors/Components | Fuel tank pressure sensor
Fuel vapor-containment valve |
| Frequency of Operation | Once per driving cycle |
CONFIRMATION DRIVING PATTERN
- NOTICE:
- ·
The Evaporative System Check (Automatic Mode) consists of 9 steps performed automatically by the GTS. It takes a maximum of approximately 40 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 start the engine during this operation.
·When the temperature of the fuel is 35°C (95°F) or higher, a large amount of vapor will from and any check result will be inaccurate. When performing the Evaporative System Check, keep the fuel temperature less than 35°C (95°F).
- HINT:
- ·
After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.
·When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the ignition switch off and wait for at least 30 seconds.
Turn the ignition switch to ON [A].
Turn the GTS on.
Enter the following menus: Powertrain / Engine / Utility / Evaporative System Check / Automatic Mode [B].
After the "Evaporative System Check" is completed, check for All Readiness by entering the following menus: Powertrain / Engine / Utility / All Readiness.
Input the DTC: P142200 or P142300.
Check the DTC judgment result.
| GTS Display | Description |
|---|---|
| NORMAL | ·
DTC judgment completed ·
System normal |
| ABNORMAL | ·
DTC judgment completed ·
System abnormal |
| INCOMPLETE | ·
DTC judgment not completed ·
Perform driving pattern after confirming DTC enabling conditions |
- HINT:
- ·
If the judgment result is NORMAL, the system is normal.
·If the judgment result is ABNORMAL, the system is malfunctioning.
·[A] to [B]: Normal judgment procedure.
The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
·When clearing the permanent DTCs, do not disconnect the cable from the auxiliary battery terminal or attempt to clear the DTCs during this procedure, as doing so will clear the universal trip and normal judgment histories.
CAUTION / NOTICE / HINT
- NOTICE:
- ·
Vehicle Control History may be stored in the hybrid vehicle control ECU assembly if the engine is malfunctioning. Certain vehicle condition information is recorded when Vehicle Control History is stored. Reading the vehicle conditions recorded in both the Freeze Frame Data and Vehicle Control History can be useful for troubleshooting.
(Select Powertrain in Health Check and then check the time stamp data.)
·If any "Engine Malfunction" Vehicle Control History item has been stored in the hybrid vehicle control ECU assembly, make sure to clear it. However, as all Vehicle Control History items are cleared simultaneously, if any Vehicle Control History items other than "Engine Malfunction" are stored, make sure to perform any troubleshooting for them before clearing Vehicle Control History.
PROCEDURE
- Result:
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