RM36D0EC _51 Engine / Hybrid System _083058 M20D-FKS ENGINE CONTROL _0401834 SFI SYSTEM C

M20D-FKS ENGINE CONTROL SFI SYSTEM P030000 Random/Multiple Cylinder Misfire Detected P030027 Random/Multiple Cylinder Misfire Detected (Emission) Signal Rate of Change Above Threshold P030085 Random / Multiple Cylinder Misfire Detected (Over Temperature) Signal Above Allowable Range P030100 Cylinder 1 Misfire Detected P030200 Cylinder 2 Misfire Detected P030300 Cylinder 3 Misfire Detected P030400 Cylinder 4 Misfire Detected

DESCRIPTION

When the engine misfires, high concentrations of hydrocarbons (HC) enter the exhaust gas. Extremely high hydrocarbon concentration levels can cause an increase in exhaust emission levels. Extremely high concentrations of hydrocarbons can also cause increases in the three-way catalytic converter temperature, which may cause damage to the three-way catalytic converter. To prevent this increase in emissions and to limit the possibility of thermal damage, the ECM monitors the misfire count. When the temperature of the three-way catalytic converter reaches the point of thermal degradation, the ECM blinks the MIL. To monitor misfires, the ECM uses both the camshaft position sensor and the crankshaft position sensor. The camshaft position sensor is used to identify any misfiring cylinders and the crankshaft position sensor is used to measure variations in the crankshaft rotation speed. Misfires are counted when the crankshaft rotation speed variations exceed predetermined thresholds. If the misfire count exceeds the threshold levels, and could cause emission control system performance deterioration, the ECM illuminates the MIL and stores a DTC.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Memory	Note
P030000	Random/Multiple Cylinder Misfire Detected	Simultaneous misfiring of several cylinders occurs and one of the following conditions is met (2 trip detection logic): · A misfire occurs that may damage the three-way catalytic converter (MIL blinks immediately when detected). · An emission deterioration misfire occurs (MIL illuminates).	· Open or short in engine wire harness · Connector connection · Vacuum hose connections · Ignition system · Port fuel injector assembly · Direct fuel injector assembly · Fuel pressure · Mass air flow meter sub-assembly · Engine coolant temperature sensor · Compression pressure · Valve timing · PCV valve and hose · PCV hose connections · Intake system · EGR valve assembly · ECM	Comes on/Blinks* *: The MIL flashes when a catalyst-damaging misfire is detected.	DTC stored	SAE: P0300
P030027	Random/Multiple Cylinder Misfire Detected (Emission) Signal Rate of Change Above Threshold	An emission deterioration misfire occurs (2 trip detection logic).	· Open or short in engine wire harness · Connector connection · Vacuum hose connections · Ignition system · Port fuel injector assembly · Direct fuel injector assembly · Fuel pressure · Mass air flow meter sub-assembly · Engine coolant temperature sensor · Compression pressure · Valve timing · PCV valve and hose · PCV hose connections · Intake system · EGR valve assembly · ECM	Comes on	DTC stored	SAE: -
P030085	Random / Multiple Cylinder Misfire Detected (Over Temperature) Signal Above Allowable Range	A misfire occurs that may damage the three-way catalytic converter (2 trip detection logic).	· Open or short in engine wire harness · Connector connection · Vacuum hose connections · Ignition system · Port fuel injector assembly · Direct fuel injector assembly · Fuel pressure · Mass air flow meter sub-assembly · Engine coolant temperature sensor · Compression pressure · Valve timing · PCV valve and hose · PCV hose connections · Intake system · EGR valve assembly · ECM	Comes on/Blinks* *: The MIL flashes when a catalyst-damaging misfire is detected.	DTC stored	SAE: -
P030100	Cylinder 1 Misfire Detected	Misfiring of a specific cylinder occurs and one of the following conditions is met (2 trip detection logic): · A misfire occurs that may damage the three-way catalytic converter (MIL blinks immediately when detected). · An emission deterioration misfire occurs (MIL illuminates).	· Open or short in engine wire harness · Connector connection · Vacuum hose connections · Ignition system · Port fuel injector assembly · Direct fuel injector assembly · Fuel pressure · Mass air flow meter sub-assembly · Engine coolant temperature sensor · Compression pressure · Valve timing · PCV valve and hose · PCV hose connections · Intake system · EGR valve assembly · ECM	Comes on/Blinks* *: The MIL flashes when a catalyst-damaging misfire is detected.	DTC stored	SAE: P0301
P030200	Cylinder 2 Misfire Detected	Misfiring of a specific cylinder occurs and one of the following conditions is met (2 trip detection logic): · A misfire occurs that may damage the three-way catalytic converter (MIL blinks immediately when detected). · An emission deterioration misfire occurs (MIL illuminates).	· Open or short in engine wire harness · Connector connection · Vacuum hose connections · Ignition system · Port fuel injector assembly · Direct fuel injector assembly · Fuel pressure · Mass air flow meter sub-assembly · Engine coolant temperature sensor · Compression pressure · Valve timing · PCV valve and hose · PCV hose connections · Intake system · EGR valve assembly · ECM	Comes on/Blinks* *: The MIL flashes when a catalyst-damaging misfire is detected.	DTC stored	SAE: P0302
P030300	Cylinder 3 Misfire Detected	Misfiring of a specific cylinder occurs and one of the following conditions is met (2 trip detection logic): · A misfire occurs that may damage the three-way catalytic converter (MIL blinks immediately when detected). · An emission deterioration misfire occurs (MIL illuminates).	· Open or short in engine wire harness · Connector connection · Vacuum hose connections · Ignition system · Port fuel injector assembly · Direct fuel injector assembly · Fuel pressure · Mass air flow meter sub-assembly · Engine coolant temperature sensor · Compression pressure · Valve timing · PCV valve and hose · PCV hose connections · Intake system · EGR valve assembly · ECM	Comes on/Blinks* *: The MIL flashes when a catalyst-damaging misfire is detected.	DTC stored	SAE: P0303
P030400	Cylinder 4 Misfire Detected	Misfiring of a specific cylinder occurs and one of the following conditions is met (2 trip detection logic): · A misfire occurs that may damage the three-way catalytic converter (MIL blinks immediately when detected). · An emission deterioration misfire occurs (MIL illuminates).	· Open or short in engine wire harness · Connector connection · Vacuum hose connections · Ignition system · Port fuel injector assembly · Direct fuel injector assembly · Fuel pressure · Mass air flow meter sub-assembly · Engine coolant temperature sensor · Compression pressure · Valve timing · PCV valve and hose · PCV hose connections · Intake system · EGR valve assembly · ECM	Comes on/Blinks* *: The MIL flashes when a catalyst-damaging misfire is detected.	DTC stored	SAE: P0304

When DTCs for misfiring cylinders are randomly stored, but DTC P030000 is not stored, it indicates that misfires have been detected in different cylinders at different times. DTC P030000 is only stored when several misfiring cylinders are detected at the same time.

MONITOR DESCRIPTION

The ECM illuminates the MIL and stores a DTC when the following conditions, which could cause emission deterioration, is detected (2 trip detection logic).

An excessive number of misfires (approximately 10 to 70 misfires per 1000 crankshaft revolutions) occurs a total of 4 times.

The ECM flashes the MIL (immediate detection logic) and stores a DTC (2 trip detection logic) when the following conditions, which could cause damage to the three-way catalytic converter, is detected.

At a normal engine speed, a sufficient amount of misfires to damage the catalyst occurring within 200 crankshaft revolutions is detected 3 times.

MONITOR STRATEGY

Required Sensors/Components (Main)	Crankshaft position sensor Camshaft position sensor
Required Sensors/Components (Related)	Engine coolant temperature Intake air temperature sensor (mass air flow meter sub-assembly) Mass air flow meter sub-assembly
Frequency of Operation	Continuous

TYPICAL ENABLING CONDITIONS

Misfire
Either of the following conditions is met	(a) or (b)
(a) Engine coolant temperature at engine start	Higher than -7°C (19°F)
(b) Engine coolant temperature	Higher than 20°C (68°F)

Monitor Period of Emission-related Misfire
Monitor period	Crankshaft 1000 revolutions x 4

Monitor Period of Catalyst-damaging Misfire (MIL Blinks)
Monitor period	Crankshaft 200 revolutions x 3

CONFIRMATION DRIVING PATTERN

HINT:: ·

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

Click hereEngine / Hybrid System>M20D-FKS (ENGINE CONTROL)>SFI SYSTEM>DTC CHECK / CLEAR202304,202409,_51,_083058,_0401834,RM1000000029C72,202409,999999,_51,_083058,_0401834,RM100000002NA8O,

·

Permanent misfire and fuel system DTCs can only be cleared when performing the universal trip driving pattern when no malfunction is detected.

Connect the GTS to the DLC3.

Turn the ignition switch to ON.

Turn the GTS on.

Record the DTC(s) and Freeze Frame Data.

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

Using the GTS, switch the ECM from normal mode to check mode.

Click hereEngine / Hybrid System>M20D-FKS (ENGINE CONTROL)>SFI SYSTEM>CHECK MODE PROCEDURE201910,999999,_51,_083058,_0401834,RM100000001JDWD,

Start the engine.

Read the misfire counts of each cylinder, Misfire Count Cylinder #1 to Misfire Count Cylinder #4, with the engine idling. If any misfire count is displayed, skip the following confirmation driving pattern.

Drive the vehicle so that the vehicle conditions displayed in Misfire RPM and Misfire Load of the Data List are the same as the Freeze Frame Data. Perform this step several times.

HINT:

In order to store misfire DTCs, it is necessary to operate the vehicle for the period of time shown in the table below, confirm the Misfire RPM and Misfire Load in the Data List.

Engine speed	Duration
Idling	8.0 minutes or more
1000	4.5 minutes or more
2000	2.5 minutes or more
3000	1.5 minutes or more

10.

Check whether misfires have occurred by checking DTCs and Freeze Frame Data.

HINT:: Do not turn the ignition switch off until the output DTC(s) and Freeze Frame Data have been recorded. When the ECM returns to normal mode (default), the stored DTC(s), Freeze Frame Data and other data are cleared.

11.

Record the DTC(s), Freeze Frame Data and misfire counts.

12.

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

13.

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

WIRING DIAGRAM

Refer to DTC P010012 for the mass air flow meter sub-assembly circuit.

Click hereEngine / Hybrid System>M20D-FKS (ENGINE CONTROL)>SFI SYSTEM>P010012202304,999999,_51,_083058,_0401834,RM1000000029C7E,P010012

CAUTION / NOTICE / HINT

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

HINT:: ·

Check the "Fuel Cut Elapsed Time" in the Data List or the Freeze Frame Data.

If the elapsed time is over 0 seconds, then the engine speed is high (engine speed at which fuel cut occurs + 500 rpm).

When this has happened, there is the possibility that the No. 1 valve rocker arm sub-assembly will become loose and a fire could start, therefore check that the No. 1 valve rocker arm sub-assembly is properly attached.

·

By clearing the DTCs, "Fuel Cut Elapsed Time" will be cleared.

·

In the past, when the primary ignition system (the igniter drive circuit in the ECM, the primary circuit in the ignition coil assembly, the related wire harness, or the connector) was out of order, diagnostic codes from P035113 to P035413 were output. However, these codes are not output in this vehicle.

When a failure in the primary ignition system is suspected, refer to "Catalyst OT Misfire Fuel Cut History", "Catalyst OT Misfire Fuel Cut Cylinder #1 to #4", and "Misfire Count Cylinder #1 to #4" in the Freeze Frame Data, the pending Freeze Frame Data, and the Data List, and confirm in which cylinder the high-frequency misfire was concentrated.

·

Referring to the following contents of the Freeze Frame Data (or the pending Freeze Frame Data) enables an estimation of which cylinder has misfired and to what degree.

-

Misfire Count Cylinder #1 to #4: Misfire count according to cylinder.

-

Catalyst OT Misfire Fuel Cut Cylinder #1 to #4: This expresses a high-frequency misfire was concentrated in a certain cylinder and that cylinder's fuel injection was stopped.

·

If any DTCs other than misfire DTCs are output, troubleshoot those DTCs first.

·

If the misfire does not recur when the vehicle is brought to the workshop, reproduce the conditions stored in the ECM as Freeze Frame Data.

·

If the misfire still cannot be reproduced even though the conditions stored in the ECM as Freeze Frame Data have been reproduced, one of the following factors is considered to be a possible cause of the problem:

(a)

There was insufficient fuel in the tank.

(b)

Improper fuel was used.

(c)

The spark plugs have been contaminated.

(d)

The problem requires further diagnosis.

·

After finishing repairs, check the misfire counts of the cylinders (Misfire Count Cylinder #1 to Misfire Count Cylinder #4).

·

Be sure to confirm that no misfiring cylinder DTCs are stored again by performing the confirmation driving pattern after finishing repairs.

·

When one of Short FT B1S1, Long FT B1S1 in the Freeze Frame Data is outside the range of +/- 20%, the air fuel ratio may be rich (-20% or less) or lean (+20% or higher).

·

When Coolant Temperature in the Freeze Frame Data is less than 75°C (167°F), the misfires have occurred only while warming up the engine.

·

Vehicle body vibration caused by an extremely imbalanced drive wheel may cause misfire DTCs to be stored.

·

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.CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO MISFIRE DTCS)

Connect the GTS to the DLC3.

Turn the ignition switch to ON.

Turn the GTS on.

Enter the following menus: Powertrain / Engine / Trouble Codes.

Read the DTCs.

Powertrain > Engine > Trouble Codes: 50001 372

Result:

Result	Proceed to
DTC P030000, P030027, P030085, P030100, P030200, P030300 and/or P030400 are output	A
DTC P030000, P030027, P030085, P030100, P030200, P030300 and/or P030400 and other DTCs are output	B

HINT:: If any DTCs other than P030000, P030027, P030085, P030100, P030200, P030300 and/or P030400 are output, troubleshoot those DTCs first.

2.CHECK PCV VALVE AND HOSE CONNECTIONS

GO TO DTC CHART

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2.CHECK PCV VALVE AND HOSE CONNECTIONS

Check the PCV hose connections.

Check the PCV valve.

Click hereEngine / Hybrid System>M20D-FKS (EMISSION CONTROL)>PCV VALVE>INSPECTION201910,999999,_51,_083061,_0402431,RM100000001JIMR,

OK:: PCV hose and PCV valve are connected correctly and are not damaged.

Result:

Proceed to
OK
NG

3.READ VALUE USING GTS (MISFIRE RPM AND MISFIRE LOAD)

REPAIR OR REPLACE PCV VALVE OR HOSE

3.READ VALUE USING GTS (MISFIRE RPM AND MISFIRE LOAD)

Connect the GTS to the DLC3.

Turn the ignition switch to ON.

Turn the GTS on.

Enter the following menus: Powertrain / Engine / Data List / Misfire RPM and Misfire Load.

Powertrain > Engine > Data List

Tester Display
Misfire RPM
Misfire Load

50003 372 146,152

Read and note the Misfire RPM and Misfire Load values.

HINT:: The Misfire RPM and Misfire Load values indicate the vehicle conditions under which the misfire occurred.

Result:

Proceed to
NEXT

4.READ VALUE USING GTS (CATALYST OT MISFIRE FUEL CUT)

Enter the following menus: Powertrain / Engine / Data List / Catalyst OT Misfire Fuel Cut.

Powertrain > Engine > Data List

Tester Display
Catalyst OT Misfire Fuel Cut

50003 372 154

Read the value displayed on the GTS.

Result:

Data List	Result	Proceed to
Catalyst OT Misfire Fuel Cut	Avail	A
Catalyst OT Misfire Fuel Cut	Not Avi	B

5.READ FREEZE FRAME DATA (CATALYST OT MISFIRE FUEL CUT HISTORY)

7.CHECK MISFIRE COUNT OF PORT INJECTION

5.READ FREEZE FRAME DATA (CATALYST OT MISFIRE FUEL CUT HISTORY)

Connect the GTS to the DLC3.

Turn the ignition switch to ON.

Turn the GTS on.

Using the GTS, confirm the vehicle conditions recorded in the Freeze Frame Data which were present when the DTC was stored.

Click hereEngine / Hybrid System>M20D-FKS (ENGINE CONTROL)>SFI SYSTEM>FREEZE FRAME DATA202304,202409,_51,_083058,_0401834,RM1000000029C73,202409,999999,_51,_083058,_0401834,RM100000002NA2S,

Result:

Freeze Frame Data Item	Result	Proceed to
Catalyst OT Misfire Fuel Cut History	ON	A
Catalyst OT Misfire Fuel Cut History	OFF	B

6.CHECK MISFIRE COUNT OF PORT INJECTION

7.CHECK MISFIRE COUNT OF PORT INJECTION

6.CHECK MISFIRE COUNT OF PORT INJECTION

Connect the GTS to the DLC3.

Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher.

Turn the GTS on.

Enter the following menus: Powertrain / Engine / Active Test / Prohibit the Catalyst OT Misfire Prevent Fuel Cut / Data List / Coolant Temperature, Injection Mode and Misfire Count Cylinder #1 to Misfire Count Cylinder #4.

Powertrain > Engine > Active Test

Active Test Display
Prohibit the Catalyst OT Misfire Prevent Fuel Cut

Data List Display
Coolant Temperature
Injection Mode
Misfire Count Cylinder #1
Misfire Count Cylinder #2
Misfire Count Cylinder #3
Misfire Count Cylinder #4

50004 372 42003 205,294,148,149,150,151

Read each value for Misfire Count Cylinder #1 to Misfire Count Cylinder #4 and Injection Mode displayed on the GTS while performing the Active Test.

Result:

Injection Mode	Misfire Count	Proceed to
Port	1 or 2 cylinders have misfire counts	A
	3 cylinders or more have misfire counts	A
	There are no misfire counts	B

8.CHECK MISFIRE COUNT OF DIRECT INJECTION

11.CHECK MISFIRE COUNT OF DIRECT INJECTION

7.CHECK MISFIRE COUNT OF PORT INJECTION

Connect the GTS to the DLC3.

Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher.

Turn the GTS on.

Enter the following menus: Powertrain / Engine / Active Test / Control the Injection Mode / Data List / Coolant Temperature, Injection Mode and Misfire Count Cylinder #1 to Misfire Count Cylinder #4.

Powertrain > Engine > Active Test

Active Test Display
Control the Injection Mode

Data List Display
Coolant Temperature
Injection Mode
Misfire Count Cylinder #1
Misfire Count Cylinder #2
Misfire Count Cylinder #3
Misfire Count Cylinder #4

50004 372 42004 205,294,148,149,150,151

According to the display on the GTS, read the Data List with the Active Test "Control the Injection Mode" set to Port. If no misfire counts occur in any cylinders, perform procedure [A] and [B] and then check the misfire counts again.

Drive the vehicle with the Misfire RPM and Misfire Load noted in the "Read Value Using GTS (Misfire RPM and Misfire Load)" procedures above [A].

ii.

Read the Injection Mode and Misfire Count Cylinder #1 to Misfire Count Cylinder #4 or DTCs displayed on the GTS [B].

Result:

Injection Mode	Misfire Count	Proceed to
Port	1 or 2 cylinders have misfire counts	A
	3 cylinders or more have misfire counts	A
	There are no misfire counts	B

8.CHECK MISFIRE COUNT OF DIRECT INJECTION

11.CHECK MISFIRE COUNT OF DIRECT INJECTION

8.CHECK MISFIRE COUNT OF DIRECT INJECTION

Connect the GTS to the DLC3.

Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher.

Turn the GTS on.

Enter the following menus: Powertrain / Engine / Active Test / Control the Injection Mode / Data List / Coolant Temperature, Injection Mode and Misfire Count Cylinder #1 to Misfire Count Cylinder #4.

Powertrain > Engine > Active Test

Active Test Display
Control the Injection Mode

Data List Display
Coolant Temperature
Injection Mode
Misfire Count Cylinder #1
Misfire Count Cylinder #2
Misfire Count Cylinder #3
Misfire Count Cylinder #4

50004 372 42004 205,294,148,149,150,151

According to the display on the GTS, read the Data List with the Active Test "Control the Injection Mode" set to Direct. If no misfire counts occur in any cylinders, perform procedure [A] and [B] and then check the misfire counts again.

Drive the vehicle with the Misfire RPM and Misfire Load noted in the "Read Value Using GTS (Misfire RPM and Misfire Load)" procedures above [A].

ii.

Read the Injection Mode and Misfire Count Cylinder #1 to Misfire Count Cylinder #4 or DTCs displayed on the GTS [B].

Result:

Misfire Count		Proceed to
Port (Result of step 6 or 7)	Direct	Proceed to
1 or 2 cylinders have misfire counts	1 or 2 cylinders have misfire counts	A
3 cylinders or more have misfire counts	3 cylinders or more have misfire counts	B
1 or 2 cylinders have misfire counts	There are no misfire counts	C
3 cylinders or more have misfire counts	There are no misfire counts	D

HINT:: Perform "Inspection After Repair" after replacing the port fuel injector assembly.; Click hereEngine / Hybrid System>M20D-FKS (ENGINE CONTROL)>SFI SYSTEM>INITIALIZATION202304,202409,_51,_083058,_0401834,RM1000000029C6V,202409,999999,_51,_083058,_0401834,RM100000002NA8M,

14.INSPECT SPARK PLUG

17.CHECK INTAKE SYSTEM

REPLACE PORT FUEL INJECTOR ASSEMBLY (MISFIRING CYLINDER)

Click hereEngine / Hybrid System>M20D-FKS (FUEL)>FUEL INJECTOR (for Port Injection)>REMOVAL202304,202405,_51,_083060,_0403632,RM100000002AAL7,202405,202409,_51,_083060,_0403632,RM100000002LUC9,202409,999999,_51,_083060,_0403632,RM100000002NFXV,

9.CHECK FUEL PRESSURE (FOR LOW PRESSURE SIDE)

Check the fuel pressure (for low pressure side).

Click hereEngine / Hybrid System>M20D-FKS (FUEL)>FUEL SYSTEM>ON-VEHICLE INSPECTION201910,999999,_51,_083060,_0403631,RM100000001JU2Y_01_0002,

HINT:: Perform "Inspection After Repair" after replacing the port fuel injector assembly.; Click hereEngine / Hybrid System>M20D-FKS (ENGINE CONTROL)>SFI SYSTEM>INITIALIZATION202304,202409,_51,_083058,_0401834,RM1000000029C6V,202409,999999,_51,_083058,_0401834,RM100000002NA8M,

Result:

Proceed to
OK
NG

REPLACE PORT FUEL INJECTOR ASSEMBLY (MISFIRING CYLINDER)

10.CHECK FUEL LINE

Check the fuel lines for leaks or blockage.

HINT:: Perform "Inspection After Repair" after replacing the fuel pump (for low pressure side).; Click hereEngine / Hybrid System>M20D-FKS (ENGINE CONTROL)>SFI SYSTEM>INITIALIZATION202304,202409,_51,_083058,_0401834,RM1000000029C6V,202409,999999,_51,_083058,_0401834,RM100000002NA8M,

Result:

Proceed to
OK
NG

GO TO FUEL PUMP CONTROL CIRCUIT

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REPAIR OR REPLACE FUEL SYSTEM

11.CHECK MISFIRE COUNT OF DIRECT INJECTION

Connect the GTS to the DLC3.

Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher.

Turn the GTS on.

Enter the following menus: Powertrain / Engine / Active Test / Control the Injection Mode / Data List / Coolant Temperature, Injection Mode and Misfire Count Cylinder #1 to Misfire Count Cylinder #4.

Powertrain > Engine > Active Test

Active Test Display
Control the Injection Mode

Data List Display
Coolant Temperature
Injection Mode
Misfire Count Cylinder #1
Misfire Count Cylinder #2
Misfire Count Cylinder #3
Misfire Count Cylinder #4

50004 372 42004 205,294,148,149,150,151

Drive the vehicle with the Misfire RPM and Misfire Load noted in the "Read Value Using GTS (Misfire RPM and Misfire Load)" procedures above [A].

ii.

Read the Injection Mode and Misfire Count Cylinder #1 to Misfire Count Cylinder #4 or DTCs displayed on the GTS [B].

Result:

Misfire Count		Proceed to
Port (Result of step 6 or 7)	Direct	Proceed to
There are no misfire counts	There are misfire counts	A
There are no misfire counts	There are no misfire counts	B

HINT:: Perform "Inspection After Repair" after replacing the direct fuel injector assembly.; Click hereEngine / Hybrid System>M20D-FKS (ENGINE CONTROL)>SFI SYSTEM>INITIALIZATION202304,202409,_51,_083058,_0401834,RM1000000029C6V,202409,999999,_51,_083058,_0401834,RM100000002NA8M,

REPLACE DIRECT FUEL INJECTOR ASSEMBLY

Click hereEngine / Hybrid System>M20D-FKS (FUEL)>FUEL INJECTOR (for Direct Injection)>REMOVAL202304,202405,_51,_083060,_0403633,RM100000002AAL9,202405,202409,_51,_083060,_0403633,RM100000002LUC8,202409,999999,_51,_083060,_0403633,RM100000002NFXW,

12.CLEAR DTC

Connect the GTS to the DLC3.

Turn the ignition switch to ON.

Turn the GTS on.

Clear the DTCs.

Powertrain > Engine > Clear DTCs: 50002 372

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

Result:

Proceed to
NEXT

13.CHECK MISFIRE COUNT

Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher.

Turn the GTS on.

Enter the following menus: Powertrain / Engine / Data List / Coolant Temperature, Injection Mode, Misfire Count Cylinder #1 to Misfire Count Cylinder #4, Misfire RPM and Misfire Load.

Powertrain > Engine > Data List

Tester Display
Coolant Temperature
Injection Mode
Misfire Count Cylinder #1
Misfire Count Cylinder #2
Misfire Count Cylinder #3
Misfire Count Cylinder #4
Misfire RPM
Misfire Load

50003 372 205,294,148,149,150,151,146,152

Drive the vehicle with Misfire RPM and Misfire Load.

Monitor all of the misfire count values and Injection Mode displayed on the GTS.

Result:

Misfire Count	Injection Mode	Proceed to
There are no misfire counts	-	A
1 or 2 cylinders have misfire counts	Port or Either	B
3 cylinders or more have misfire counts	Port or Either	C
There are misfire counts	Direct	D

HINT:: Perform "Inspection After Repair" after replacing the direct fuel injector assembly.; Click hereEngine / Hybrid System>M20D-FKS (ENGINE CONTROL)>SFI SYSTEM>INITIALIZATION202304,202409,_51,_083058,_0401834,RM1000000029C6V,202409,999999,_51,_083058,_0401834,RM100000002NA8M,

CHECK FOR INTERMITTENT PROBLEMS

Click hereEngine / Hybrid System>M20D-FKS (ENGINE CONTROL)>SFI SYSTEM>CHECK FOR INTERMITTENT PROBLEMS201910,999999,_51,_083058,_0401834,RM100000001JDWB,

14.INSPECT SPARK PLUG

17.CHECK INTAKE SYSTEM

REPLACE DIRECT FUEL INJECTOR ASSEMBLY

14.INSPECT SPARK PLUG

Inspect the spark plug of the misfiring cylinder.

Click hereEngine / Hybrid System>M20D-FKS (ENGINE CONTROL)>IGNITION SYSTEM>ON-VEHICLE INSPECTION201910,999999,_51,_083058,_0401814,RM100000001JDTI,

HINT:: Perform "Inspection After Repair" after replacing the spark plug.; Click hereEngine / Hybrid System>M20D-FKS (ENGINE CONTROL)>SFI SYSTEM>INITIALIZATION202304,202409,_51,_083058,_0401834,RM1000000029C6V,202409,999999,_51,_083058,_0401834,RM100000002NA8M,

Result:

Proceed to
OK
NG

15.CHECK FOR SPARK (SPARK TEST)

REPLACE SPARK PLUG

Click hereEngine / Hybrid System>M20D-FKS (ENGINE CONTROL)>IGNITION COIL AND SPARK PLUG>REMOVAL201910,999999,_51,_083058,_0401827,RM100000001JDUX,

15.CHECK FOR SPARK (SPARK TEST)

Perform a spark test.

Click hereEngine / Hybrid System>M20D-FKS (ENGINE CONTROL)>IGNITION SYSTEM>ON-VEHICLE INSPECTION201910,999999,_51,_083058,_0401814,RM100000001JDTI,

HINT:: ·

If the result of the spark test is normal, proceed to the next step.

·

Perform "Inspection After Repair" after replacing the spark plug or ignition coil assembly.

Click hereEngine / Hybrid System>M20D-FKS (ENGINE CONTROL)>SFI SYSTEM>INITIALIZATION202304,202409,_51,_083058,_0401834,RM1000000029C6V,202409,999999,_51,_083058,_0401834,RM100000002NA8M,

Result:

Proceed to
NEXT

16.CHECK CYLINDER COMPRESSION PRESSURE

Measure the cylinder compression pressure of the misfiring cylinder.

Click hereEngine / Hybrid System>M20D-FKS (ENGINE MECHANICAL)>ENGINE>ON-VEHICLE INSPECTION201910,999999,_51,_083059,_0403040,RM100000001JN11_01_0010,

HINT:: Perform "Inspection After Repair" after repairing or replacing the engine assembly.; Click hereEngine / Hybrid System>M20D-FKS (ENGINE CONTROL)>SFI SYSTEM>INITIALIZATION202304,202409,_51,_083058,_0401834,RM1000000029C6V,202409,999999,_51,_083058,_0401834,RM100000002NA8M,

Result:

Proceed to
OK
NG

REPLACE ECM

Click hereEngine / Hybrid System>M20D-FKS (ENGINE CONTROL)>ECM>REMOVAL202304,202409,_51,_083058,_0401822,RM100000002A02S,202409,999999,_51,_083058,_0401822,RM100000002NRO9,

CHECK ENGINE TO DETERMINE CAUSE OF LOW COMPRESSION

17.CHECK INTAKE SYSTEM

Check the intake system for vacuum leaks.

Click hereEngine / Hybrid System>M20D-FKS (INTAKE / EXHAUST)>INTAKE SYSTEM>ON-VEHICLE INSPECTION201910,999999,_51,_083062,_0402929,RM100000001JLXD,

OK:: No leaks from intake system.

HINT:: Perform "Inspection After Repair" after repairing or replacing the intake system.; Click hereEngine / Hybrid System>M20D-FKS (ENGINE CONTROL)>SFI SYSTEM>INITIALIZATION202304,202409,_51,_083058,_0401834,RM1000000029C6V,202409,999999,_51,_083058,_0401834,RM100000002NA8M,

Result:

Proceed to
OK
NG

18.READ VALUE USING GTS (COOLANT TEMPERATURE)

REPAIR OR REPLACE INTAKE SYSTEM

18.READ VALUE USING GTS (COOLANT TEMPERATURE)

Connect the GTS to the DLC3.

Turn the ignition switch to ON.

Turn the GTS on.

Enter the following menus: Powertrain / Engine / Data List / Coolant Temperature.

Powertrain > Engine > Data List

Tester Display
Coolant Temperature

50003 372 205

Read the Data List twice, when the engine is both cold and warmed up.

Standard:

GTS Display	Condition	Specified Condition
Coolant Temperature	Cold engine	Same as ambient air temperature
Coolant Temperature	Warm engine	Between 75 and 100°C (167 and 212°F)

HINT:: Perform "Inspection After Repair" after replacing the engine coolant temperature sensor.; Click hereEngine / Hybrid System>M20D-FKS (ENGINE CONTROL)>SFI SYSTEM>INITIALIZATION202304,202409,_51,_083058,_0401834,RM1000000029C6V,202409,999999,_51,_083058,_0401834,RM100000002NA8M,

Result:

Proceed to
OK
NG

19.READ VALUE USING GTS (MASS AIR FLOW SENSOR)

REPLACE ENGINE COOLANT TEMPERATURE SENSOR

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19.READ VALUE USING GTS (MASS AIR FLOW SENSOR)

Connect the GTS to the DLC3.

Start the engine.

Turn the GTS on.

Enter the following menus: Powertrain / Engine / Data List / Engine Speed, Mass Air Flow Sensor and Coolant Temperature.

Powertrain > Engine > Data List

Tester Display
Engine Speed
Mass Air Flow Sensor
Coolant Temperature

50003 372 211,215,205

Allow the engine to idle until Coolant Temperature reaches 75°C (167°F) or higher.

Read Mass Air Flow Sensor while maintaining an engine speed of 3000 rpm.

Standard:

GTS Display	Condition	Specified Condition
Mass Air Flow Sensor	Engine warmed up Shift position: P A/C: Off Engine Speed: 3000 rpm	Between 8 and 13 gm/sec

Result:

Proceed to
OK
NG

20.PERFORM ACTIVE TEST USING GTS (CONTROL THE EGR STEP POSITION)

23.CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER SUB-ASSEMBLY CONNECTOR CONNECTION)

20.PERFORM ACTIVE TEST USING GTS (CONTROL THE EGR STEP POSITION)

Connect the GTS to the DLC3.

Turn the ignition switch to ON.

Turn the GTS on.

Start the engine and warm it up until the engine coolant temperature is 75°C (167°F) or higher.

HINT:: The A/C switch and all accessories should be off.

Enter the following menus: Powertrain / Engine / Active Test / Control the EGR Step Position / Data List / Engine Speed, Intake Manifold Absolute Pressure and Coolant Temperature.

Powertrain > Engine > Active Test

Active Test Display
Control the EGR Step Position

Data List Display
Engine Speed
Intake Manifold Absolute Pressure
Coolant Temperature

50004 372 25 211,385,205

Check the engine idling condition and Intake Manifold Absolute Pressure values in the Data List while performing the Active Test.

NOTICE:: ·

Do not leave the EGR valve open for 10 seconds or more during the Active Test.

·

Be sure to return the EGR valve to step 0 when the Active Test is completed.

·

Do not open the EGR valve 30 steps or more during the Active Test.

OK:: The value of Intake Manifold Absolute Pressure and Engine Speed change in response to EGR step position.

Standard:

-	Control the EGR Step Position (Active Test)
-	0 Steps	0 to 30 Steps
Idling condition	Steady idling	Idling changes from steady to rough idling or engine stalls
Intake Manifold Absolute Pressure (Data List)	Intake Manifold Absolute Pressure value is 18 to 38 kPa(abs) (2.6 to 5.5 psi(abs)) (EGR valve is fully closed)	Intake Manifold Absolute Pressure value is at least +10 kPa (1.45 psi) higher than when EGR valve is fully closed

HINT:: During Active Test, if the idling condition does not change in response to EGR step position, then there is probably a malfunction in the EGR valve.

Result:

Proceed to
OK
NG

22.CHECK VALVE TIMING (CHECK FOR LOOSE AND JUMPED TEETH ON TIMING CHAIN)

21.INSPECT EGR VALVE ASSEMBLY

Remove the EGR valve assembly.

Click hereEngine / Hybrid System>M20D-FKS (EMISSION CONTROL)>EGR VALVE>REMOVAL201910,999999,_51,_083061,_0402425,RM100000001JIM8,

Check if the EGR valve is stuck open.

OK:: EGR valve is tightly closed.

HINT:: Perform "Inspection After Repair" after replacing the EGR valve assembly.; Click hereEngine / Hybrid System>M20D-FKS (ENGINE CONTROL)>SFI SYSTEM>INITIALIZATION202304,202409,_51,_083058,_0401834,RM1000000029C6V,202409,999999,_51,_083058,_0401834,RM100000002NA8M,

Result:

Proceed to
OK
NG

22.CHECK VALVE TIMING (CHECK FOR LOOSE AND JUMPED TEETH ON TIMING CHAIN)

REPLACE EGR VALVE ASSEMBLY

Click hereEngine / Hybrid System>M20D-FKS (EMISSION CONTROL)>EGR VALVE>REMOVAL201910,999999,_51,_083061,_0402425,RM100000001JIM8,

22.CHECK VALVE TIMING (CHECK FOR LOOSE AND JUMPED TEETH ON TIMING CHAIN)

0.469,2.26 1.208,1.094 true 0.469,2.24 1.208,0.771 true 3.208,2.24 2.531,0.854 true 3.219,2.25 2.563,0.698 true 0.75,4.417 2.104,4.292 true 0.5,3.75 2.021,4.188 true 3.156,2.24 3.375,2.448 0.219,0.208 10 false *a 0.594,4.344 0.906,4.5 0.313,0.156 10 false *b 0.344,3.646 0.656,3.802 0.313,0.156 10 false *c 0.375,2.271 0.688,2.427 0.313,0.156 10 false *a

*a	Timing Mark
*b	TDC Timing Mark
*c	Groove

Remove the cylinder head cover sub-assembly.

Turn the crankshaft pulley and align its groove with the TDC timing mark of the timing chain cover.

Check that the timing marks of the camshaft timing gear assembly and camshaft timing exhaust gear assembly are at the positions shown in the illustration.

HINT:: If the timing marks are not as shown, turn the crankshaft one revolution clockwise.

OK:: Timing marks on camshaft timing gear assembly and camshaft timing exhaust gear assembly are at the positions shown in the illustration.

HINT:: If the result is not as specified, check for mechanical malfunctions that may have affected the valve timing, such as a jumped tooth or stretching of the timing chain.

Result:

Proceed to
OK
NG

23.CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER SUB-ASSEMBLY CONNECTOR CONNECTION)

REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA

23.CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER SUB-ASSEMBLY CONNECTOR CONNECTION)

Check the connection and terminal contact pressure of connectors and wire harnesses between the mass air flow meter sub-assembly and ECM.

Click hereGeneral>INTRODUCTION>HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS>ELECTRONIC CIRCUIT INSPECTION PROCEDURE201910,999999,_V1,_083040,_0402301,RM100000001JHC9,

HINT:: Repair any problems.

Result:

Proceed to
NEXT

24.CLEAR DTC

Connect the GTS to the DLC3.

Turn the ignition switch to ON.

Turn the GTS on.

Clear the DTCs.

Powertrain > Engine > Clear DTCs: 50002 372

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

Result:

Proceed to
NEXT

25.CHECK WHETHER DTC OUTPUT RECURS (MISFIRE DTCS)

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: P030000, P030027, P030085, P030100, P030200, P030300 or P030400.

Check the DTC judgment result.

Result:

Result	Proceed to
NORMAL (DTCs are not output)	A
ABNORMAL (DTC P030000, P030027, P030085, P030100, P030200, P030300 and/or P030400 is output)	B

END

26.CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER SUB-ASSEMBLY - ECM)

Disconnect the mass air flow meter sub-assembly connector.

Disconnect the ECM connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
C17-3 (VCC) - C71-137 (VCVG)	Always	Below 1 Ω
C17-1 (FG) - C71-135 (VG)	Always	Below 1 Ω
C17-2 (E2G) - C71-136 (E2G)	Always	Below 1 Ω
C17-3 (VCC) or C71-137 (VCVG) - Body ground and other terminals	Always	10 kΩ or higher
C17-1 (FG) or C71-135 (VG) - Body ground and other terminals	Always	10 kΩ or higher
C17-2 (E2G) or C71-136 (E2G) - Body ground and other terminals	Always	10 kΩ or higher

Result:

Proceed to
OK
NG

27.REPLACE MASS AIR FLOW METER SUB-ASSEMBLY

REPAIR OR REPLACE HARNESS OR CONNECTOR

27.REPLACE MASS AIR FLOW METER SUB-ASSEMBLY

Replace the mass air flow meter sub-assembly.

Click hereEngine / Hybrid System>M20D-FKS (ENGINE CONTROL)>MASS AIR FLOW METER>REMOVAL201910,999999,_51,_083058,_0401824,RM100000001JDUN,

HINT:: ·

If the results of the inspections performed in step 19 (READ VALUE USING GTS (MASS AIR FLOW SENSOR)) indicated no problem, proceed to the next step without replacing the mass air flow meter sub-assembly.

·

Perform "Inspection After Repair" after replacing the mass air flow meter sub-assembly.

Click hereEngine / Hybrid System>M20D-FKS (ENGINE CONTROL)>SFI SYSTEM>INITIALIZATION202304,202409,_51,_083058,_0401834,RM1000000029C6V,202409,999999,_51,_083058,_0401834,RM100000002NA8M,

Result:

Proceed to
NEXT

28.CLEAR DTC

Connect the GTS to the DLC3.

Turn the ignition switch to ON.

Turn the GTS on.

Clear the DTCs.

Powertrain > Engine > Clear DTCs: 50002 372

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

Result:

Proceed to
NEXT

29.CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

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: P030000, P030027, P030085, P030100, P030200, P030300 or P030400.

Check the DTC judgment result.

Result:

Result	Proceed to
NORMAL (DTCs are not output)	A
ABNORMAL (DTC P030000, P030027, P030085, P030100, P030200, P030300 and/or P030400 is output)	B

END

REPLACE ECM

Click hereEngine / Hybrid System>M20D-FKS (ENGINE CONTROL)>ECM>REMOVAL202304,202409,_51,_083058,_0401822,RM100000002A02S,202409,999999,_51,_083058,_0401822,RM100000002NRO9,