Engine Hybrid System. Yaris. Ncp93, 131
1Nz-Fe Engine Control. Yaris. Ncp93, 131
TYPICAL MALFUNCTION THRESHOLDS
DTC P043E Evaporative Emission System Leak Detection Reference Orifice Low Flow |
DTC P043F Evaporative Emission System Reference Orifice High Flow |
DTC P2401 Evaporative Emission Leak Detection Pump Stuck OFF |
DTC P2402 Evaporative Emission Leak Detection Pump Stuck ON |
DTC P2419 Evaporative Emission System Switching Valve Control Circuit Low |
DTC SUMMARY
| DTC No. | Monitoring Item | Malfunction Detection Condition | Trouble Area | Detection Timing | Detection Logic |
| P043E | Reference orifice clogged | P043E, P043F, P2401, P2402 and P2419 stored when one of following conditions met during key-off EVAP monitor:
|
| While ignition switch off | 2 trip |
| P043F | Reference orifice high-flow | ||||
| P2401 | Leak detection pump stuck OFF | ||||
| P2402 | Leak detection pump stuck ON | ||||
| P2419 | Vent valve stuck closed |
- HINT:
- The reference orifice is located inside the canister pump module.
DESCRIPTION
The description can be found in EVAP (Evaporative Emission) System (YARIS_NCP93 RM0000011IO028X.html).MONITOR DESCRIPTION
5 hours* after the ignition switch is turned off, the leak detection pump creates negative pressure (vacuum) in the EVAP system. The ECM monitors for leaks and actuator malfunctions based on the EVAP pressure.- HINT:
- *: 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.
| Sequence | Operation | Description | Duration |
| - | ECM activation | Activated by soak timer, 5, 7 or 9.5 hours after ignition switch turned off. | - |
| A | Atmospheric pressure measurement | Vent valve is turned off (vent) and EVAP system pressure is measured by ECM in order to register atmospheric pressure. If pressure in EVAP system is not between 70 kPa(abs) and 110 kPa(abs) [525 mmHg(abs) and 825 mmHg(abs)], ECM cancels EVAP system monitor. | 60 seconds |
| B | First reference pressure measurement | In order to determine reference pressure, leak detection pump creates negative pressure (vacuum) through reference orifice and then ECM checks if leak detection pump and vent valve operate normally. | 360 seconds |
| C | EVAP system pressure measurement | Vent valve is turned on (closed) to shut EVAP system. Negative pressure (vacuum) is created in EVAP system, and EVAP system pressure is then measured. Write down measured value as it will be used in leak check If EVAP pressure does not stabilize within 15 minutes, ECM cancels EVAP system monitor. | 15 minutes* |
| D | Purge VSV monitor | Purge VSV is opened and then EVAP system pressure is measured by ECM. Large increase indicates normal. | 10 seconds |
| E | Second reference pressure measurement | After second reference pressure measurement, leak check is performed by comparing first and second reference pressure measurements. If stabilized system pressure is higher than second reference pressure, ECM determines that EVAP system is leaking. | 60 seconds |
| - | Final check | Atmospheric pressure is measured and then monitoring result is recorded by ECM. | - |
| *1 | Purge VSV: OFF (closed) | *2 | Purge VSV: ON (open) |
| *3 | Vent Valve: OFF (vent) | *4 | Vent Valve: ON (closed) |
| *5 | Leak Detection Pump: OFF | *6 | Leak Detection Pump: ON |
| *7 | Reference Orifice (0.02 inch) | *8 | Canister Pressure Sensor |
| *9 | Canister | *10 | Fuel Tank |
| *11 | Canister Pump Module | *12 | Canister Filter |
| *a | Operation A: Atmospheric Pressure Measurement | *b | Operation B, E: Reference Pressure Measurement |
| *c | Operation C: EVAP System Pressure Measurement | *d | Operation D: Purge VSV Monitor |
| *e | Atmospheric Pressure | *f | Negative Pressure |
*: Typical value.
MONITOR STRATEGY
| Required Sensors/Components | Canister pump module |
| Frequency of Operation | Once per driving cycle |
| Duration | Within 2 minutes |
| MIL Operation | 2 driving cycles |
| Sequence of Operation | None |
TYPICAL ENABLING CONDITIONS
| Monitor runs whenever following DTCs not present | None |
| Atmospheric pressure | 70 to 110 kPa(abs) [525 to 825 mmHg(abs)] |
| Battery voltage | 10.5 V or higher |
| Vehicle speed | Less than 4 km/h (2.5 mph) |
| Ignition switch | OFF |
| Time after key-off | 5, 7 or 9.5 hours |
| Canister pressure sensor malfunction | Not detected |
| Purge VSV | Not operated by scan tool |
| Vent valve | Not operated by scan tool |
| Leak detection pump | Not operated by scan tool |
| Both of following conditions met before key-off | Conditions 1 and 2 |
| 1. Duration that vehicle is driven | 5 minutes or more |
| 2. EVAP purge operation | Performed |
| Engine coolant temperature | 4.4 to 35°C (40 to 95°F) |
| Intake air temperature | 4.4 to 35°C (40 to 95°F) |
TYPICAL MALFUNCTION THRESHOLDS
"Saturated" indicates that the EVAP pressure change is below 0.286 kPa(gauge) [2.145 mmHg(gauge)] in 60 seconds.| One of following conditions met | - |
| EVAP pressure just after reference pressure measurement started | Higher than -0.25 kPa(gauge) [-1.875 mmHg(gauge)] |
| Reference pressure | Below -4.85 kPa(gauge) [-36.377 mmHg(gauge)] |
| Reference pressure | -1.057 kPa(gauge) [-7.928 mmHg(gauge)] or higher |
| Reference pressure | Not saturated within 360 seconds |
| Reference pressure difference between first and second | 0.9 kPa(gauge) [6.75 mmHg(gauge)] or higher |
MONITOR RESULT
Refer to EVAP System (YARIS_NCP93 RM0000011IO028X_13.html).CONFIRMATION DRIVING PATTERN
- NOTICE:
- The Evaporative System Check (Automatic Mode) consists of 6 steps performed automatically by the Techstream. It takes a maximum of approximately 24 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 higher, 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).
- Connect the Techstream to the DLC3.
- Turn the ignition switch to ON and turn the Techstream on.
- Clear DTCs (even if no DTCs are stored, perform the clear DTC procedure) (YARIS_NCP93 RM000000PDK0T5X.html).
- Turn the ignition switch off and wait for at least 30 seconds.
- Turn the ignition switch to ON and turn the Techstream on.
- Enter the following menus: Powertrain / Engine and ECT / Utility / Evaporative System Check / Automatic Mode.
- After the "Evaporative System Check" is completed, check for All Readiness by entering the following menus: Powertrain / Engine and ECT / Utility / All readiness.
- Input the DTC: P043E, P043F, P2401, P2402 or P2419.
- Check the DTC judgment result.
Techstream 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
N/A - Unable to perform DTC judgment
- Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit
- HINT:
- If the judgment result shows NORMAL, the system is normal.
- If the judgment result shows ABNORMAL, the system has a malfunction.
- DTC judgment completed
- If the judgment result is INCOMPLETE or N/A and no pending DTC is output, perform a universal trip and check for permanent DTCs (YARIS_NCP93 RM000000PDK0T5X.html).
- HINT:
- If a permanent DTC is output, the system is malfunctioning.
- If no permanent DTC is output, the system is normal.