Engine Hybrid System. Corolla. Zre142 Aze141
2Zr-Fe Engine Control. Corolla. Zre142 Aze141
TYPICAL MALFUNCTION THRESHOLDS
DTC P043E Evaporative Emission System Reference Orifice Clog Up |
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 present 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 the EVAP (Evaporative Emission) System (COROLLA_ZRE142 RM0000011IO03FX_07.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. | 60 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. | - |
The leak detection pump creates negative pressure through the reference orifice (in operation B and E). When the system is normal, the EVAP pressure is between 97 to 100 kPa(abs) [728 to 750 mmHg(abs)]* and saturated within a minute.
If not, the ECM interprets this as a malfunction. The ECM will illuminate the MIL and set DTC if this malfunction is detected in consecutive drive cycles.
*: Typical valve
MONITOR STRATEGY
| Required Sensors/Components | Canister pump module |
| Frequency of Operation | Once per driving cycle |
| Duration | Within 7 minutes |
| MIL Operation | 2 driving cycles |
| Sequence of Operation | None |
TYPICAL ENABLING CONDITIONS
| Monitor runs whenever following DTCs not present | None |
| Atmospheric pressure | 70 kPa(abs) [525 mmHg(abs)] or higher, and less than 110 kPa(abs) [825 mmHg(abs)] |
| Battery voltage | 10.5 V or more |
| Vehicle speed | Below 2.5 mph (4 km/h) |
| Ignition switch | Off |
| Time after key off | 5, 7 or 9.5 hours |
| Canister pressure sensor malfunction (P0452 and P0453) | 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 are 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°C (40°F) or more, and less than 35°C (95°F) |
| Intake air temperature | 4.4°C (40°F) or more, and less than 35°C (95°F) |
TYPICAL MALFUNCTION THRESHOLDS
"Saturated" indicates that the EVAP pressure change is less than 0.286 kPa(gauge) [2.14 mmHg(gauge)] in 60 seconds.| One of following conditions met | - |
| EVAP pressure just after reference pressure measurement start | More than -1 kPa(gauge) [-7.5 mmHg(gauge)] |
| Reference pressure | Less than -4.85 kPa(gauge) [-36.38 mmHg(gauge)] |
| Reference pressure | -1.057 kPa(gauge) [-7.929 mmHg(gauge)] or more |
| Reference pressure | Not saturated within 60 seconds |
| Reference pressure difference between first and second | 0.9 kPa(gauge) [6.75 mmHg(gauge)] or more |
MONITOR RESULT
Refer to Checking Monitor Status (Link).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 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).
- Connect the Techstream to the DLC3.
- Turn the ignition switch to ON and turn the Techstream on.
- Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure) (COROLLA_ZRE142 RM000000PDK0ZAX.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's memory limit
- HINT:
- If the judgment result shows ABNORMAL, the system has a malfunction.
- If the judgment result shows NORMAL, the system is normal.
- DTC judgment completed
- If the test result is INCOMPLETE or N/A and no pending DTC is output, perform a universal trip and check for permanent DTCs (COROLLA_ZRE142 RM000000PDK0ZAX.html).
- HINT:
- If a permanent DTC is output, the system is malfunctioning.
- If no permanent DTC is output, the system is normal.