Brand:

Toyota

Model Name:

4Runner GRN210 215 UZN210 215

Manual:

Repair Manual

Section:

1Gr-Fe Engine Control System

Title:

Sfi System

  1. Dtc summary

  2. Description

  3. Inspection procedure

  4. Monitor description

  5. Monitor strategy

  6. Typical enabling conditions

  7. Typical malfunction thresholds

  8. Monitor result

DTC P043E Evaporative Emission System Reference Orifice Clog Up

DTC P043F Evaporative Emission System Reference Orifice High Flow


​

DTC SUMMARY


DTCs
Monitoring Items
Malfunction Detection Conditions
Trouble Areas
Detection Timings
Detection Logic
P043E
0.02 inch orifice clogged
Vacuum pump creates negative pressure through 0.02 inch orifice, and EVAP system pressure is measured to determine leak pressure standard. The 0.02 inch leak pressure standard measured at the start and end of the leak check.
If system pressure is lower than -4.85 kPa (-36.38 mmHg)*, ECM determines that 0.02 inch orifice has clogging malfunction.
  1. Pump module
  2. Connector/wire harness (Pump module - ECM)
  3. ECM
  4. Leakage from EVAP system
While ignition switch OFF
2 trip
P043F
0.02 inch orifice high-flow
Vacuum pump creates negative pressure through 0.02 inch orifice, and EVAP system pressure is measured to determine leak pressure standard. The 0.02 inch leak pressure standard generated at the start and at the end of leak check.
If system pressure is higher than -1.06 kPa (-7.95 mmHg)*, ECM determines that 0.02 inch orifice has high-flow malfunction.
  1. Pump module
  2. Connector/wire harness (Pump module - ECM)
  3. ECM
  4. Leakage from EVAP system
While ignition switch OFF
2 trip
*: The threshold values vary according to the atmospheric pressure measured at the EVAP monitor beginning. The values described in the table above are based on an atmospheric pressure of 100 kPa (750.1 mmHg) (absolute pressure).
HINT:
The 0.02 inch orifice is located inside the pump module.

DESCRIPTION

The circuit description can be found in the EVAP (Evaporative Emission) System (Click here).

INSPECTION PROCEDURE

Refer to the EVAP System (Click here).

MONITOR DESCRIPTION

5 hours*1 after the ignition switch is turned to off, the electric vacuum pump creates negative pressure (vacuum) in the EVAP (Evaporative Emission) system. The ECM monitors for leaks and actuator malfunctions based on the EVAP pressure.

HINT:
*1: 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
Operations
Descriptions
Duration
-
ECM activation
Activated by soak timer, 5 hours (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 is not between 70 kPa and 110 kPa (525 mmHg and 825 mmHg), ECM cancels EVAP system monitor.
10 seconds
B
First 0.02 inch leak pressure measurement
In order to determine 0.02 inch leak pressure standard, vacuum pump creates negative pressure (vacuum) through 0.02 inch orifice and then ECM checks if vacuum pump and vent valve operate normally.
60 seconds
C
EVAP system pressure measurement
Vent valve turned ON (closed) to shut EVAP system.
Negative pressure (vacuum) is 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*2
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 0.02 inch leak pressure measurement
After second 0.02 inch leak pressure measurement, leak check is performed by comparing first and second 0.02 inch leak pressure standards.
If stabilized system pressure is higher than second 0.02 inch leak pressure standard, ECM determines that EVAP system leaking.
60 seconds
F
Final check
Atmospheric pressure is measured and then monitoring result is recorded by ECM.
-
*2: If there is only a small amount of fuel in the fuel tank, it takes longer for the EVAP pressure to stabilize.

P043E: 0.02 inch orifice cloggedIn operation B, the vacuum pump creates negative pressure (vacuum) through the 0.02 inch orifice. The EVAP system pressure is then measured by the ECM, using the pressure sensor, to determine the 0.02 inch leak pressure standard. If the pressure is lower than -4.85 kPa (-36.38 mmHg)*, the ECM interprets this as a clog malfunction in the 0.02 inch orifice, and stops the EVAP (Evaporative Emission) system monitor.The ECM then illuminates the MIL and sets the DTC (2 trip detection logic).*: The threshold varies according to the atmospheric pressure measured in operation A. The value described above is based on an atmospheric pressure of 100 kPa (750.1 mmHg): absolute pressure. 4Runner

  1. P043E: 0.02 inch orifice clogged
    In operation B, the vacuum pump creates negative pressure (vacuum) through the 0.02 inch orifice. The EVAP system pressure is then measured by the ECM, using the pressure sensor, to determine the 0.02 inch leak pressure standard. If the pressure is lower than -4.85 kPa (-36.38 mmHg)*, the ECM interprets this as a clog malfunction in the 0.02 inch orifice, and stops the EVAP (Evaporative Emission) system monitor.
    The ECM then illuminates the MIL and sets the DTC (2 trip detection logic).
    *: The threshold varies according to the atmospheric pressure measured in operation A. The value described above is based on an atmospheric pressure of 100 kPa (750.1 mmHg): absolute pressure.


    P043F: 0.02 inch orifice high-flowIn operation B, the vacuum pump creates negative pressure (vacuum) through the 0.02 inch orifice. The EVAP system pressure is then measured by the ECM using the pressure sensor to determine the 0.02 inch leak pressure standard. If the pressure is higher than -1.06 kPa (-7.95 mmHg)*, the ECM interprets this as a high-flow malfunction in the 0.02 inch orifice, and stops the EVAP system monitor. The ECM then illuminates the MIL and sets the DTC (2 trip detection logic).*: The threshold varies according to the atmospheric pressure measured in operation A. The value described above is based on a atmospheric pressure of 100 kPa (750.1 mmHg): absolute pressure. 4Runner

  2. P043F: 0.02 inch orifice high-flow
    In operation B, the vacuum pump creates negative pressure (vacuum) through the 0.02 inch orifice. The EVAP system pressure is then measured by the ECM using the pressure sensor to determine the 0.02 inch leak pressure standard. If the pressure is higher than -1.06 kPa (-7.95 mmHg)*, the ECM interprets this as a high-flow malfunction in the 0.02 inch orifice, and stops the EVAP system monitor. The ECM then illuminates the MIL and sets the DTC (2 trip detection logic).
    *: The threshold varies according to the atmospheric pressure measured in operation A. The value described above is based on a atmospheric pressure of 100 kPa (750.1 mmHg): absolute pressure.


    1. Atmospheric pressure measurement Next sequence is run if the following condition is set-Atmospheric pressure changeWithin 0.3 kPa (2.25 mmHg) in 1 second2. First reference pressure measurement Next sequence is run if the following conditions are setCondition 1, 2 and 31. EVAP pressure just after reference pressure measurement start-1 kPa (-7.5 mmHg) or less2. Reference pressure-4.85 to -1.057 kPa (-36.38 to -7.92 mmHg)3. Reference pressureSaturated3. EVAP canister vent valve close stuck check Next sequence is run if the following condition is set-EVAP pressure change after vent valve is ON0.3 kPa (2.25 mmHg) or more4. Vacuum introduction Next sequence is run if the following condition is set-EVAP pressureSaturated within 12 minutes5. EVAP canister purge valve close stuck check Next sequence is run if the following condition is set-EVAP pressure change after purge valve is open0.3 kPa (2.25 mmHg) or more6. Second reference pressure measurement Next sequence is run if the following conditions are setCondition 1, 2, 3 and 41. EVAP pressure just after reference pressure-1 kPa (-7.5 mmHg) or less2. Reference pressure-4.85 to -1.057 kPa (-36.38 to -7.93 mmHg)3. Reference pressureSaturated4. Difference between the first reference pressure and the second reference pressureLess than 0.7 kPa (5.25 mmHg)7. Leak check Next sequence is run if the following condition is set-EVAP pressure when vacuum introduction is completeLower than second reference pressure8. Atmospheric pressure measurement EVAP monitor is complete if the following condition is set-Atmospheric pressure difference between sequence 1 and 8Within 0.3 kPa (2.25 mmHg) 4Runner


MONITOR STRATEGY


Related DTCs
P043E: 0.02 inch orifice clog (built-in pump module)
P043F: 0.02 inch orifice high-flow (built-in pump module)
Required Sensors / Components
Pump module
Required sensors / components (Related)
A/F sensor, Rear HO2S, IAT sensor, MAF meter, Crankshaft position sensor, ECT sensor
Frequency of Operation
Once per driving cycle
Duration
Within 2 minutes (varies with amount of fuel in tank)
MIL Operation
2 driving cycles
Sequence of Operation
None

TYPICAL ENABLING CONDITIONS


The monitor will run whenever these DTCs are not present
None
Atmospheric pressure
70 to 110 kPa (525 to 825 mmHg)
Battery voltage
10.5 V or more
Vehicle speed
Less than 2.5 mph (4 km/h)
Ignition switch
OFF
Time after key off
5 or 7 or 9.5 hours
EVAP pressure sensor malfunction (P0450, P0452, P0453)
Not detected
EVAP canister purge valve
Not operated by scan tool
EVAP canister vent valve
Not operated by scan tool
EVAP leak detection pump
Not operated by scan tool
Both of the following conditions are met before key off
Condition 1 and 2
1. Duration that vehicle has been 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)
Key-off monitor sequence 1 to 8

  1. 1. Atmospheric pressure measurement
    Next sequence is run if the following condition is set
    		-
    Atmospheric pressure change
    		Within 0.3 kPa (2.25 mmHg) in 1 second

    2. First reference pressure measurement
    Next sequence is run if the following conditions are set
    		Condition 1, 2 and 3
    1. EVAP pressure just after reference pressure measurement start
    		-1 kPa (-7.5 mmHg) or less
    2. Reference pressure
    		-4.85 to -1.057 kPa (-36.38 to -7.92 mmHg)
    3. Reference pressure
    		Saturated

    3. EVAP canister vent valve close stuck check
    Next sequence is run if the following condition is set
    		-
    EVAP pressure change after vent valve is ON
    		0.3 kPa (2.25 mmHg) or more

    4. Vacuum introduction
    Next sequence is run if the following condition is set
    		-
    EVAP pressure
    		Saturated within 12 minutes

    5. EVAP canister purge valve close stuck check
    Next sequence is run if the following condition is set
    		-
    EVAP pressure change after purge valve is open
    		0.3 kPa (2.25 mmHg) or more

    6. Second reference pressure measurement
    Next sequence is run if the following conditions are set
    		Condition 1, 2, 3 and 4
    1. EVAP pressure just after reference pressure
    		-1 kPa (-7.5 mmHg) or less
    2. Reference pressure
    		-4.85 to -1.057 kPa (-36.38 to -7.93 mmHg)
    3. Reference pressure
    		Saturated
    4. Difference between the first reference pressure and the second reference pressure
    		Less than 0.7 kPa (5.25 mmHg)

    7. Leak check
    Next sequence is run if the following condition is set
    		-
    EVAP pressure when vacuum introduction is complete
    		Lower than second reference pressure

    8. Atmospheric pressure measurement
    EVAP monitor is complete if the following condition is set
    		-
    Atmospheric pressure difference between sequence 1 and 8
    		Within 0.3 kPa (2.25 mmHg)

TYPICAL MALFUNCTION THRESHOLDS


One of following conditions met
Condition 1, 2, 3, 4 or 5
1. EVAP pressure just after reference pressure measurement start
More than -1 kPa (-7.5 mmHg)
2. Reference pressure
Less than -4.85 kPa (-36.38 mmHg)
3. Reference pressure
-1.057 kPa (-7.93 mmHg) or more
4. Reference pressure
Not saturated
5. Difference between first reference pressure and second reference pressure
0.7 kPa (5.25 mmHg) or more

MONITOR RESULT

Refer to Monitor Result for detailed information (Click here).