DTC SUMMARY
DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Memory | Note |
---|---|---|---|---|---|---|
P142000 | Evaporative Emission Canister (Small Leak) | Leak detection pump creates negative pressure (vacuum) in EVAP system and EVAP system pressure is measured. Reference pressure is measured at the start and at the end of leak check. If stabilized pressure is higher than second reference pressure, ECM determines that EVAP system has a small leak. |
| Comes on | DTC stored | SAE Code: P1420 |
P142100 | Evaporative Emission Canister (Gross Leak) | Leak detection pump creates negative pressure (vacuum) in EVAP system and EVAP system pressure is measured. Reference pressure is measured at the start and at the end of leak check. If stabilized pressure is higher than [second reference pressure x 0.2], ECM determines that EVAP system has a large leak. |
| Comes on | DTC stored | SAE Code: P1421 |
DTC No. | Monitoring Item | Detection Timing | Detection Logic | SAE Code |
---|---|---|---|---|
P142000 | Canister small leak | EVAP monitoring (Power switch off) | 2 trip | P1420 |
P142100 | Canister gross leak | P1421 |
DESCRIPTION
Refer to EVAP (evaporative emission) System.
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MONITOR DESCRIPTION
In operation C, the leak detection pump creates negative pressure (vacuum) in the EVAP system and the EVAP system pressure is measured. If the stabilized system pressure is higher than the second reference pressure, the ECM determines that the EVAP system has a small leak, illuminates the MIL and stores the DTC (2 trip detection logic).
In operation C, the leak detection 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 reference pressure x 0.2] (near atmospheric pressure), the ECM determines that the EVAP system has a large leak, illuminates the MIL and stores the DTC (2 trip detection logic).
MONITOR STRATEGY
Required Sensors/Components (Main) | Purge VSV Canister pump module |
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
P1420: EVAP Small Leak EVAP pressure when vacuum introduction for canister was complete | Between conditions 1 and 2 |
Condition 1 | Higher than second reference pressure |
Condition 2 | Lower than [second reference pressure x 0.2] |
EVAP pressure when vacuum introduction for canister was complete | Higher than [second 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 |
|
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 |