DTC SUMMARY
DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Memory | 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. |
| Comes on | DTC stored | 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. |
| Comes on | DTC stored | SAE Code: P1423 |
DTC No. | Monitoring Item | Detection Timing | Detection Logic | SAE Code |
---|---|---|---|---|
P142200 | Fuel tank small leak | EVAP monitoring (power switch off) | 2 trip | P1422 |
P142300 | Fuel tank gross leak | P1423 |
DESCRIPTION
Refer to EVAP (evaporative emission) System.
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MONITOR DESCRIPTION
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).
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 (Main) | Fuel tank pressure sensor Fuel vapor-containment valve |
Required Sensors/Components (Related) | - |
Frequency of Operation | Once per driving cycle |
Duration | Within 20 minutes |
MIL Operation | 2 driving cycles |
Sequence of Operation | None |
TYPICAL ENABLING CONDITIONS
Key-off monitor runs when all of the following conditions are met | - |
Atmospheric pressure | 70 kPa(abs) [10.2 psi(abs)] or higher, and less than 110 kPa(abs) [16 psi(abs)] |
Auxiliary battery voltage | 10.5 V or higher |
Vehicle speed | Less than 4 km/h (2.5 mph) |
Power switch | Off |
Engine condition | Not running |
Key-OFF duration | 5, 7 or 9.5 hours |
Pressure sensor of canister pump module malfunction (P0451, P0452, P0453) | Not detected |
Fuel tank pressure sensor malfunction (P1451, P1452, P1453) | Not detected |
Purge VSV | Not operated by scan tool |
Vent valve | Not operated by scan tool |
Fuel vapor-containment valve | Not operated by scan tool |
Leak detection pump | Not operated by scan tool |
Purge flow before key-OFF | Performed |
Engine coolant temperature | 4.4°C (39.9°F) or higher, and less than 35°C (95°F) |
Intake air temperature | 4.4°C (39.9°F) or higher, and less than 35°C (95°F) |
TYPICAL MALFUNCTION THRESHOLDS
P1422: Fuel Tank Small Leak Fuel tank pressure when vacuum introduction for fuel tank was complete | Between conditions 1 and 2 |
Condition 1 | Higher than third reference pressure |
Condition 2 | Lower than [third reference pressure x 0.2] |
Fuel tank pressure when vacuum introduction for fuel tank was complete | Higher than [third reference pressure x 0.2] |
MONITOR RESULT
Refer to EVAP system.
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CONFIRMATION DRIVING PATTERN
NOTICE:
HINT:
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Techstream Display | Description |
---|---|
NORMAL |
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ABNORMAL |
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INCOMPLETE |
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HINT:
The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
CAUTION / NOTICE / HINT
NOTICE:
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(Select Powertrain in Health Check and then check the time stamp data.)
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PROCEDURE
1. | GO TO EVAP SYSTEM |
(a) Refer to EVAP System.
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NEXT | END |