RM3660EC _51 Engine / Hybrid System _080777 NR Series ENGINE CONTROL _0393969 SFI SYSTEM C

NR Series ENGINE CONTROL SFI SYSTEM P04419C Evaporative Emission System Incorrect Purge Flow Low/Insufficient Flow

DTC SUMMARY

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Memory	Note
P04419C	Evaporative Emission System Incorrect Purge Flow Low/Insufficient Flow	While engine running, following conditions successively met: · Negative pressure not created in EVAP system when purge VSV turned on (open) · EVAP system pressure change less than 0.15 kPa (0.022 psi) when vent valve turned on (closed) · Atmospheric pressure change before and after purge flow monitor less than 0.1 kPa (0.015 psi)	· Open or short in purge VSV circuit · Purge VSV · No. 1 check valve · No. 2 charcoal canister sub-assembly · Purge line · Canister (filter inside canister clogged) · ECM	Comes on	DTC stored	SAE Code: P0441

DTC No.	Monitoring Item	Detection Timing	Detection Logic	SAE
P04419C	· Purge VSV stuck closed · No. 1 check valve stuck closed · Purge flow	While engine running	2 trip	P0441

DESCRIPTION

The description can be found in EVAP (Evaporative Emission) System.

Click hereEngine / Hybrid System>NR Series (ENGINE CONTROL)>SFI SYSTEM>EVAP System201906,202304,_51,_080777,_0393969,RM100000001I1WT_07,202304,999999,_51,_080777,_0393969,RM100000002C0QZ_07,

Purge flow monitor

The purge flow monitor consists of the 2 monitors. The 1st monitor is conducted every time and the 2nd monitor is activated if necessary.

The 1st monitor

While the engine is running and the purge VSV (Vacuum Switching Valve) is on (open), the ECM monitors the purge flow by measuring the EVAP pressure change. If negative pressure is not created, the ECM begins the 2nd monitor.

The 2nd monitor

The vent valve is turned on (closed) and the EVAP pressure is then measured. If the variation in the pressure is less than 0.15 kPa (0.022 psi), the ECM interprets this as the purge VSV or No. 1 check valve being stuck closed, illuminates the MIL and stores DTC P04419C (2 trip detection logic).

Atmospheric pressure check:

In order to ensure reliable malfunction detection, the variation between the atmospheric pressures, before and after of the purge flow monitor, is measured by the ECM.

1.677,4.167 1.531,4.167 1.531,4.167 1.313,3.708 false 2.01,1.75 1.865,1.75 1.865,1.75 1.813,2.365 false 2.677,0.521 2.531,0.521 2.531,0.521 2.5,0.927 false 2.948,0.854 2.802,0.854 2.802,0.854 2.729,1.115 false 2.406,1.188 2.292,0.927 2.292,0.927 2.135,0.927 false 2.938,3.26 2.615,3.833 2.615,3.833 2.417,3.833 false 3.26,3 2.948,2.615 2.948,2.615 2.792,2.615 false 4.688,2.469 4.542,2.469 4.542,2.469 3.802,2.625 false 4.604,3.823 4.458,3.823 4.458,3.823 3.917,3.344 false 1.333,1.958 1.188,1.958 1.188,1.958 1.115,2.219 false 6.229,2.104 6.542,2.302 0.313,0.198 10 false *1 1.073,3.406 1.385,3.604 0.313,0.198 10 false *2 1.729,4.094 2.042,4.292 0.313,0.198 10 false *3 2.063,1.677 2.375,1.875 0.313,0.198 10 false *4 2.729,0.448 3.042,0.646 0.313,0.198 10 false *5 2.979,0.771 3.292,0.969 0.313,0.198 10 false *6 1.969,0.844 2.281,1.042 0.313,0.198 10 false *6 3.531,1.802 3.844,2 0.313,0.198 10 false *7 2.26,3.76 2.573,3.958 0.313,0.198 10 false *8 2.635,2.542 2.948,2.74 0.313,0.198 10 false *9 4.74,2.406 5.052,2.604 0.313,0.198 10 false *10 4.656,3.75 4.969,3.948 0.313,0.198 10 false *11 4.198,4.167 4.51,4.365 0.313,0.198 10 false *12 1.375,1.875 1.688,2.073 0.313,0.198 10 false *13 0.469,2.906 0.781,3.104 0.313,0.198 10 false *14 0.313,0.271 0.625,0.469 0.313,0.198 10 false *a

*1	Canister	*2	ECM
*3	Soak Timer	*4	Purge VSV (On)
*5	Fuel Cap	*6	Canister Filter
*7	Fuel Tank	*8	Leak Detection Pump (Off)
*9	Canister Pressure Sensor	*10	Reference Orifice (0.02 inches)
*11	Vent Valve (Off)	*12	Canister Pump Module
*13	No. 1 Check Valve	*14	to Intake Manifold
*a	EVAP Purge Flow	-	-

MONITOR DESCRIPTION

PURGE FLOW MONITOR

The purge flow monitor consists of 2 monitors. The 1st monitor is conducted every time and the 2nd monitor is activated if necessary.

0.083,0.063 2.833,0.302 2.75,0.24 10 false EVAP Pressure During Purge Flow Monitor: 2.031,0.708 2.833,0.917 0.802,0.208 10 false Purge VSV 2.063,1.063 2.833,1.25 0.771,0.188 10 false Vent Valve 1.75,1.427 2.833,1.667 1.083,0.24 10 false EVAP Pressure 3.583,0.646 4,0.833 0.417,0.188 10 false Open 3.625,1.021 4.5,1.25 0.875,0.229 10 false ON (Closed) 4.427,1.271 5.26,1.469 0.833,0.198 10 false Malfunction 4.427,1.573 6.833,1.813 2.406,0.24 10 false 0.1 kPa (0.015 psi) 4.427,1.958 6.865,2.24 2.438,0.281 10 false 0.15 kPa (0.022 psi) 2.813,2.417 4.333,2.667 1.521,0.25 10 false 1st Monitor 2nd Monitor 3.229,1.781 3.5,2 0.271,0.219 10 false OK 4.125,2.146 4.417,2.333 0.292,0.188 10 false OK

The 1st monitor

While the engine is running and the purge VSV is on (open), the ECM monitors the purge flow by measuring the EVAP pressure change. If negative pressure is not created, the ECM begins the 2nd monitor.

The 2nd monitor

The vent valve is turned on (closed) and the EVAP pressure is then measured. If the variation in the pressure is less than 0.150 kPa (0.022 psi), the ECM interprets this as the purge VSV or No. 1 check valve being stuck closed, illuminates the MIL and stores DTC P04419C (2 trip detection logic).

Atmospheric pressure check:

In order to ensure reliable malfunction detection, the variation between the atmospheric pressures, before and after conduction of the purge flow monitor, is measured by the ECM.

MONITOR STRATEGY

Required Sensors/Components	No. 1 check valve Purge VSV Canister pump module
Frequency of Operation	Once per driving cycle

CONFIRMATION DRIVING PATTERN

HINT:: ·

After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.

Click hereEngine / Hybrid System>NR Series (ENGINE CONTROL)>SFI SYSTEM>DTC CHECK / CLEAR201906,202304,_51,_080777,_0393969,RM100000001I1QP,202304,999999,_51,_080777,_0393969,RM100000002BZUH,

·

When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.

Click hereEngine / Hybrid System>NR Series (ENGINE CONTROL)>SFI SYSTEM>DTC CHECK / CLEAR201906,202304,_51,_080777,_0393969,RM100000001I1QP,202304,999999,_51,_080777,_0393969,RM100000002BZUH,

Connect the GTS to the DLC3.

Turn the ignition switch to ON.

Turn the GTS on.

Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).

Turn the ignition switch off and wait for at least 30 seconds.

Start the engine and wait 15 minutes or more [A].

Turn the GTS on.

Enter the following menus: Powertrain / Engine / Trouble Codes [B].

Read the pending DTCs.

HINT:: ·

If a pending DTC is output, the system is malfunctioning.

·

If a pending DTC is not output, perform the following procedure.

10.

Enter the following menus: Powertrain / Engine / Utility / All Readiness.

11.

Input the DTC: P04419C.

12.

Check the DTC judgment result.

GTS Display	Description
NORMAL	· DTC judgment completed · System normal
ABNORMAL	· DTC judgment completed · System abnormal
INCOMPLETE	· DTC judgment not completed · You should perform driving pattern after confirming DTC enabling conditions

HINT:: ·

If the judgment result shows NORMAL, the system is normal.

·

If the judgment result shows ABNORMAL, the system has a malfunction.

·

[A] to [B]: Normal judgment procedure.

The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.

·

When clearing the permanent DTCs, do not disconnect the cable from the battery terminal or attempt to clear the DTCs during this procedure, as doing so will clear the universal trip and normal judgment histories.

WIRING DIAGRAM

Refer to DTC P045011.

Click hereEngine / Hybrid System>NR Series (ENGINE CONTROL)>SFI SYSTEM>P045011201906,999999,_51,_080777,_0393969,RM100000001I1WG_05,P045011

CAUTION / NOTICE / HINT

NOTICE:: Inspect the fuses for circuits related to this system before performing the following procedure.

HINT:: Read Freeze Frame Data using the GTS. The ECM records vehicle and driving condition information as Freeze Frame Data the moment a DTC is stored. When troubleshooting, Freeze Frame Data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

PROCEDURE

1.PERFORM ACTIVE TEST USING GTS (ACTIVATE THE EVAP PURGE VSV)

Connect the GTS to the DLC3.

Turn the ignition switch to ON.

Turn the GTS on.

Enter the following menus: Powertrain / Engine / Active Test / Activate the EVAP Purge VSV.

Powertrain > Engine > Active Test

Tester Display
Activate the EVAP Purge VSV

50004 372 1

1.438,0.698 1.635,0.698 1.635,0.698 1.833,0.99 true 1.219,1.99 1.417,1.99 1.417,1.99 1.615,1.625 true 1.208,0.594 1.375,0.792 0.167,0.198 10 true *2 1.021,1.885 1.188,2.063 0.167,0.177 10 true *1

*1	Purge VSV
*2	No. 1 Fuel Vapor Feed Hose (to Canister)

Disconnect the No. 1 fuel vapor feed hose (connected to the canister) from the purge VSV.

Start the engine.

Using the GTS, turn on the purge VSV (Activate the EVAP Purge VSV: ON).

Use your finger to confirm that the purge VSV has suction.

Result:

Test Result	Suspected Trouble Area	Proceed to
Suction applied	· Problems with EVAP hose between canister and purge VSV · Canister (charcoal filter inside canister) clogged	A
No suction	· Purge VSV stuck closed · No. 1 check valve stuck closed · Problems with EVAP hose between purge VSV and intake manifold · ECM	B

2.INSPECT EVAP HOSE (PURGE VSV - CANISTER)

7.CHECK EVAP HOSE (PURGE VSV - INTAKE MANIFOLD)

2.INSPECT EVAP HOSE (PURGE VSV - CANISTER)

Check for blockages in the EVAP purge line between the purge VSV and canister.

OK:: No blockages in the EVAP purge line between the purge VSV and canister.

Result:

Proceed to
OK
NG

3.INSPECT CANISTER (CHARCOAL FILTER INSIDE CANISTER)

6.REPAIR OR REPLACE EVAP PURGE LINE (PURGE VSV - CANISTER)

3.INSPECT CANISTER (CHARCOAL FILTER INSIDE CANISTER)

Check for filter blockage in the canister.

Click hereEngine / Hybrid System>NR Series (EMISSION CONTROL)>CANISTER>INSPECTION201906,202007,_51,_080792,_0392507,RM100000001HRCN,202007,999999,_51,_080792,_0392507,RM100000001N9MA,

OK:: No blockages in the canister.

Result:

Proceed to
OK
NG

4.REPLACE NO. 2 CHARCOAL CANISTER SUB-ASSEMBLY

5.REPLACE CANISTER

4.REPLACE NO. 2 CHARCOAL CANISTER SUB-ASSEMBLY

Replace the canister pump module (No. 2 charcoal canister sub-assembly).

Click hereEngine / Hybrid System>NR Series (EMISSION CONTROL)>CANISTER>REMOVAL201906,999999,_51,_080792,_0392507,RM100000001HRCO,

NOTICE:: ·

When replacing the canister pump module, check the canister pump module interior, canister interior and related pipes for water, fuel and other liquids. If liquids are present, check for disconnections and/or cracks in the following: 1) the hose between the canister and the canister pump module; 2) the pipe between the air inlet port and the canister pump module; 3) the canister filter; and 4) the fuel tank vent hose. If liquids are present in the canister interior, replace the canister and canister pump module together.

·

Check for filter blockage in the canister. If the charcoal filter inside the canister is clogged, replace the canister and canister pump module together.

·

Check for filter blockage in the canister filter. If the canister filter has blockages, replace the canister filter.

3.781,2.76 4.344,1.115 4.344,1.115 4.552,1.115 true 4.927,3.615 5.073,3.427 5.073,3.427 5.219,3.427 true 3.104,1.229 2.927,0.781 2.927,0.781 2.635,0.781 true 4.656,3.188 4.969,2.698 4.969,2.698 5.188,2.698 true 4.625,1.906 4.885,1.5 4.885,1.5 5.104,1.5 true 4.896,4.51 5.01,4.75 5.01,4.75 5.146,4.75 true 4.604,4.594 4.375,5.01 4.375,5.01 4.219,5.01 true 4.771,4.719 4.51,5.198 4.51,5.198 4.354,5.198 true 4.635,1.031 4.948,1.229 0.313,0.198 10 false *1 5.271,3.354 5.583,3.552 0.313,0.198 10 false *2 5.198,4.667 5.51,4.865 0.313,0.198 10 false *3 2.479,0.708 2.792,0.906 0.313,0.198 10 false *4 5.24,2.615 5.552,2.813 0.313,0.198 10 false *5 5.156,1.417 5.469,1.615 0.313,0.198 10 false *6 4.031,4.927 4.344,5.125 0.313,0.198 10 false *7 4.177,5.115 4.49,5.313 0.313,0.198 10 false *8 3.896,4.656 4.208,4.854 0.313,0.198 10 false *a 5.823,3.708 6.135,3.906 0.313,0.198 10 false *a

*1	Fuel Tank Vent Hose	*2	Vent Hose
*3	Air Inlet Port	*4	Fuel Tank
*5	No. 2 Charcoal Canister Sub-assembly · Canister Pump Module	*6	Canister
*7	Canister Filter	*8	Fuel Cap
*a	Inspection Area (check for disconnection and/or cracks)	-	-

Result:

Proceed to
NEXT

20.CLEAR DTC

5.REPLACE CANISTER

Replace the canister.

Click hereEngine / Hybrid System>NR Series (EMISSION CONTROL)>CANISTER>REMOVAL201906,999999,_51,_080792,_0392507,RM100000001HRCO,

NOTICE:: ·

When replacing the canister, check the canister pump module interior and related pipes for water, fuel and other liquids. If liquids are present, check for disconnections and/or cracks in the following: 1) the hose between the canister and the canister pump module; 2) the pipe between the air inlet port and the canister pump module; 3) the canister filter; and 4) the fuel tank vent hose.

·

Check for filter blockage in the canister filter. if the canister filter has blockages, replace the canister filter.

*1	Fuel Tank Vent Hose	*2	Vent Hose
*3	Air Inlet Port	*4	Fuel Tank
*5	No. 2 Charcoal Canister Sub-assembly · Canister Pump Module	*6	Canister
*7	Canister Filter	*8	Fuel Cap
*a	Inspection Area (check for disconnection and/or cracks)	-	-

Result:

Proceed to
NEXT

20.CLEAR DTC

6.REPAIR OR REPLACE EVAP PURGE LINE (PURGE VSV - CANISTER)

Result:

Proceed to
NEXT

20.CLEAR DTC

7.CHECK EVAP HOSE (PURGE VSV - INTAKE MANIFOLD)

2.198,1.792 2.427,2.198 2.427,2.198 2.646,2.198 true 1.281,1.24 1.49,0.896 1.49,0.896 1.708,0.896 true 2.729,2.104 2.938,2.302 0.208,0.198 10 true *1 1.76,0.792 1.958,0.99 0.198,0.198 10 true *2

*1	Purge VSV
*2	No. 2 Fuel Vapor Feed Hose (to Intake Manifold)

Disconnect the No. 2 fuel vapor feed hose (connected to the intake manifold) from the purge VSV.

Start the engine.

Use your finger to confirm that the No. 2 fuel vapor feed hose has suction.

Result:

Test Result	Suspected Trouble Area	Proceed to
Suction applied	EVAP hose between purge VSV and intake manifold normal · Purge VSV · Purge VSV power source · Wire harness or connector between purge VSV and ECM · ECM	A
No suction	· No. 1 check valve · Intake manifold port · EVAP hose between purge VSV and intake manifold	B

8.INSPECT PURGE VSV

15.CHECK NO. 1 CHECK VALVE

8.INSPECT PURGE VSV

Remove the purge VSV.

2.438,1.25 2.677,1.469 0.24,0.219 10 false E 2.938,2.198 3.177,2.417 0.24,0.219 10 false F 2.094,2.469 2.333,2.688 0.24,0.219 10 false *1

Purge VSV

Apply battery voltage to the terminals of the purge VSV.

Confirm that air flows from port E to port F.

Result:

Test Result	Condition	Suspected Trouble Area	Proceed to
Air flows	Battery voltage is applied to purge VSV terminals	Purge VSV normal · Purge VSV power source · Wire harness or connector between purge VSV and ECM · ECM	A
No air flow	Battery voltage is applied to purge VSV terminals	Purge VSV	B

9.CHECK TERMINAL VOLTAGE (POWER SOURCE OF PURGE VSV)

14.REPLACE PURGE VSV

9.CHECK TERMINAL VOLTAGE (POWER SOURCE OF PURGE VSV)

Disconnect the purge VSV connector.

0.5,1.167 0.948,1.438 0.448,0.271 0.115,0.094 0.427,0.25 0.313,0.156 10 false *a 0.604,1.229 0.979,1.406 0.375,0.177 10 false C29

*a	Front view of wire harness connector (to Purge VSV)

Turn the ignition switch to ON.

Measure the voltage according to the value(s) in the table below.

Result:

Tester Connection	Condition	Specified Condition	Suspected Trouble Area	Proceed to
C29-1 - Body ground	Ignition switch ON	11 to 14 V	Purge VSV power source normal · Wire harness or connector between purge VSV and ECM	A
C29-1 - Body ground	Ignition switch ON	Other than result above	Wire harness or connectors between purge VSV and battery	B

10.CHECK HARNESS AND CONNECTOR (PURGE VSV - ECM)

13.REPAIR OR REPLACE HARNESS OR CONNECTOR (PURGE VSV - NO. 1 INTEGRATION RELAY)

10.CHECK HARNESS AND CONNECTOR (PURGE VSV - ECM)

Disconnect the ECM connector.

Disconnect the purge VSV connector.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
C29-2 - C78-70 (PRG)	Always	Below 1 Ω
C29-2 or C78-70 (PRG) - Body ground and other terminals	Always	10 kΩ or higher

Result:

Proceed to
OK
NG

11.REPLACE ECM

12.REPAIR OR REPLACE HARNESS OR CONNECTOR

11.REPLACE ECM

Replace the ECM.

Click hereEngine / Hybrid System>NR Series (ENGINE CONTROL)>ECM>REMOVAL201906,202205,_51,_080777,_0392337,RM100000001HQ1V,202205,202304,_51,_080777,_0392337,RM1000000022YB3,202304,999999,_51,_080777,_0392337,RM100000002BCAH,

Result:

Proceed to
NEXT

20.CLEAR DTC

12.REPAIR OR REPLACE HARNESS OR CONNECTOR

Result:

Proceed to
NEXT

20.CLEAR DTC

13.REPAIR OR REPLACE HARNESS OR CONNECTOR (PURGE VSV - NO. 1 INTEGRATION RELAY)

Result:

Proceed to
NEXT

20.CLEAR DTC

14.REPLACE PURGE VSV

Replace the purge VSV.

Click hereEngine / Hybrid System>NR Series (EMISSION CONTROL)>PURGE VALVE>REMOVAL201906,999999,_51,_080792,_0392496,RM100000001HRBQ,

Result:

Proceed to
NEXT

20.CLEAR DTC

15.CHECK NO. 1 CHECK VALVE

Check the No. 1 check valve.

Click hereEngine / Hybrid System>NR Series (EMISSION CONTROL)>PURGE VALVE>INSPECTION201906,999999,_51,_080792,_0392496,RM100000001HRBO_01_0002,

Result:

Proceed to
OK
NG

16.INSPECT INTAKE MANIFOLD (EVAP PURGE PORT)

19.REPLACE NO. 1 CHECK VALVE

16.INSPECT INTAKE MANIFOLD (EVAP PURGE PORT)

Stop the engine.

Disconnect the EVAP hose from the intake manifold.

Start the engine.

Use your finger to confirm that the port of the intake manifold has suction.

Result:

Tester Connection	Suspected Trouble Area	Proceed to
Suction applied	EVAP hose between intake manifold and purge VSV	A
No suction	Intake manifold (upper intake manifold)	B

17.REPAIR OR REPLACE EVAP PURGE LINE (INTAKE MANIFOLD - PURGE VSV)

18.INSPECT INTAKE MANIFOLD (EVAP PURGE PORT)

17.REPAIR OR REPLACE EVAP PURGE LINE (INTAKE MANIFOLD - PURGE VSV)

Result:

Proceed to
NEXT

20.CLEAR DTC

18.INSPECT INTAKE MANIFOLD (EVAP PURGE PORT)

Check that the EVAP purge port of the intake manifold is not clogged. If necessary, replace the intake manifold.

Click hereEngine / Hybrid System>NR Series (INTAKE / EXHAUST)>INTAKE MANIFOLD>REMOVAL201906,999999,_51,_080791,_0392517,RM100000001HRDB,

Result:

Proceed to
NEXT

20.CLEAR DTC

19.REPLACE NO. 1 CHECK VALVE

Replace the No. 1 check valve.

Click hereEngine / Hybrid System>NR Series (EMISSION CONTROL)>PURGE VALVE>REMOVAL201906,999999,_51,_080792,_0392496,RM100000001HRBQ,

Result:

Proceed to
NEXT

20.CLEAR DTC

Connect the GTS to the DLC3.

Turn the ignition switch to ON.

Turn the GTS on.

Clear the DTC after recording the Freeze Frame Data and DTC.

Powertrain > Engine > Clear DTCs: 50002 372

Turn the ignition switch off and wait for at least 30 seconds.

Result:

Proceed to
NEXT

21.CHECK WHETHER DTC OUTPUT RECURS (DTC P04419C)

Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.

Enter the following menus: Powertrain / Engine / Utility / All Readiness.

Powertrain > Engine > Utility

Tester Display
All Readiness

50005 372 20

Input the DTC: P04419C.

Check the DTC judgment result.

GTS 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

Result:

Proceed to
NEXT

END