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:
- Reference orifice clogged
- Reference orifice high-flow
- Leak detection pump OFF malfunction
- Leak detection pump ON malfunction
- Vent valve ON (closed) malfunction
|
- Canister pump module (Reference orifice, leak detection pump, vent valve)
- Connector/wire harness (Canister pump module - ECM)
- EVAP system hose (pipe from air inlet port to canister pump module, canister filter, fuel tank vent hose)
- ECM
| 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 (See page
 ). CAUTION / NOTICE / HINT
Refer to the EVAP System (See page
). 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 turned OFF (vent) and EVAP system pressure measured by ECM in order to register atmospheric pressure.
If pressure in EVAP system not between 70 kPa-a and 110 kPa-a (525 mmHg-a and 825 mmHg-a), 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 turned ON (closed) to shut EVAP system. Negative pressure (vacuum) created in EVAP system, and EVAP system pressure 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 opened and then EVAP system pressure measured by ECM.
Large increase indicates normality. |
10 seconds | |
E | Second reference pressure measurement |
After second reference pressure measurement, leak check performed by comparing first and second reference pressure.
If stabilized system pressure higher than second reference pressure, ECM determines that EVAP system leaking. |
60 seconds | |
- | Final check | Atmospheric pressure measured and then monitoring result recorded by ECM. |
- | *: If only a small amount of fuel is in the fuel tank, it takes longer for the EVAP pressure to stabilize.
 The
leak detection pump creates negative pressure through the reference
orifice. When the system is normal, the EVAP pressure is between 724 and
752 mmHg* and saturated within a minute. If not, the ECM interprets
this as a malfunction. The ECM will illuminate the MIL and store a DTC
if this malfunction is detected in consecutive drive cycles. *: Typical value.
 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 |
P0452, P0453 (EVAP system) | | EVAP key-off monitor runs when all of following conditions met |
- | | Atmospheric pressure |
70 to 110 kPa-a (525 to 825 mmHg-a) | |
Battery voltage | 10.5 V or more | |
Vehicle speed | Below 4 km/h (2.5 mph) | |
Ignition switch | Off | |
Time after key off | 5, 7 or 9.5 hours | |
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 driven |
5 minutes or more | | 2. EVAP purge operation |
Performed | | ECT |
4.4 to 35°C (40 to 95°F) | |
IAT | 4.4 to 35°C (40 to 95°F) | TYPICAL MALFUNCTION THRESHOLDS
"Saturated" indicates that the EVAP pressure change is less than 0.286 kPa-g (2.14 mmHg-g) in 60 seconds. |
One of following conditions met | - | |
EVAP pressure just after reference pressure measurement started |
More than -0.25 kPa-g (-1.88 mmHg-g) | |
Reference pressure | Less than -4.85 kPa-g (-36.4 mmHg-g) | |
Reference pressure | -1.057 kPa-g (-7.93 mmHg-g) or more | |
Reference pressure | Not saturated within 360 seconds | |
Reference pressure difference between first and second measurement |
0.9 kPa-g (6.75 mmHg-g) or more | 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 operation).
- 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 "Evaporative System Check" is completed, check 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.
|
Tester 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 ABNORMAL, the system has a malfunction.
- If the test result is INCOMPLETE or N/A and no pending DTC is output,
perform a universal trip and check for permanent DTCs (See page
).
HINT:
- If a permanent DTC is output, the system is malfunctioning.
- If no permanent DTC is output, the system is normal.
MONITOR RESULT Refer to Checking Monitor Status (See page
). PROCEDURE
(a) Refer to EVAP System (See page
).
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 | END | |
