SFI SYSTEM(w/o Canister Pump Module), Diagnostic DTC:P030000, P030027, P030085, P030100, P030200, P030300, P030400

DTC Code	DTC Name
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 Code: 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 Code: -
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 Code: -
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 Code: 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 Code: 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 Code: 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 Code: 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

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 here
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.

Tech Tips

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

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

Tech Tips

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

WIRING DIAGRAM

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

Click here

CAUTION / NOTICE / HINT

Note

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

Tech Tips

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, so 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:

1. There was insufficient fuel in the tank.
2. Improper fuel was used.
3. The spark plugs have been contaminated.
4. 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

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

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

Tech Tips

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

GO TO DTC CHART Click here

CHECK PCV VALVE AND HOSE CONNECTIONS

Check the PCV hose connections.

Check the PCV valve.

Click here

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

Result

Proceed to
OK
NG

REPAIR OR REPLACE PCV VALVE OR HOSE

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

Read and note the Misfire RPM and Misfire Load values.

Tech Tips

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

Result

Proceed to
NEXT

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

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].
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

CHECK MISFIRE COUNT OF DIRECT INJECTION Click here

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

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].
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

Tech Tips

Perform "Inspection After Repair" after replacing the port fuel injector assembly.

Click here

GO TO STEP 11 Click here

GO TO STEP 14 Click here

REPLACE PORT FUEL INJECTOR ASSEMBLY (MISFIRING CYLINDER) Click here

CHECK FUEL PRESSURE (FOR LOW PRESSURE SIDE)

Check the fuel pressure (for low pressure side).

Click here

Tech Tips

Perform "Inspection After Repair" after replacing the port fuel injector assembly.

Click here

Result

Proceed to
OK
NG

REPLACE PORT FUEL INJECTOR ASSEMBLY (MISFIRING CYLINDER) Click here

CHECK FUEL LINE

Check the fuel lines for leaks or blockage.

Tech Tips

Perform "Inspection After Repair" after replacing the fuel pump (for low pressure side).

Click here

Result

Proceed to
OK
NG

REPLACE FUEL PUMP (FOR LOW PRESSURE SIDE) Click here

REPAIR OR REPLACE FUEL SYSTEM

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

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].
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

Tech Tips

Perform "Inspection After Repair" after replacing the direct fuel injector assembly.

Click here

REPLACE DIRECT FUEL INJECTOR ASSEMBLY Click here

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

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

Result

Proceed to
NEXT

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

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

Tech Tips

Perform "Inspection After Repair" after replacing the direct fuel injector assembly.

Click here

CHECK FOR INTERMITTENT PROBLEMS Click here

CHECK INTAKE SYSTEM Click here

REPLACE DIRECT FUEL INJECTOR ASSEMBLY Click here

INSPECT SPARK PLUG

Inspect the spark plug of the misfiring cylinder.

Click here

Tech Tips

Perform "Inspection After Repair" after replacing the spark plug.

Click here

Result

Proceed to
OK
NG

REPLACE SPARK PLUG Click here

CHECK FOR SPARK (SPARK TEST)

Perform a spark test.

Click here

Tech Tips

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 here

Result

Proceed to
NEXT

CHECK CYLINDER COMPRESSION PRESSURE

Measure the cylinder compression pressure of the misfiring cylinder.

Click here

Tech Tips

Perform "Inspection After Repair" after repairing or replacing the engine assembly.

Click here

Result

Proceed to
OK
NG

REPLACE ECM Click here

CHECK ENGINE TO DETERMINE CAUSE OF LOW COMPRESSION

CHECK INTAKE SYSTEM

Check the intake system for vacuum leaks.

Click here

OK
No leaks from intake system.

Tech Tips

Perform "Inspection After Repair" after repairing or replacing the intake system.

Click here

Result

Proceed to
OK
NG

REPAIR OR REPLACE INTAKE SYSTEM

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

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)

Tech Tips

Perform "Inspection After Repair" after replacing the engine coolant temperature sensor.

Click here

Result

Proceed to
OK
NG

REPLACE ENGINE COOLANT TEMPERATURE SENSOR Click here

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

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 7.5 and 12.5 gm/sec

Result

Proceed to
OK
NG

CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER SUB-ASSEMBLY CONNECTOR CONNECTION) Click here

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.

Tech Tips

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

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

Note

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 20 to 40 kPa(abs)

(2.9 to 5.8 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

Tech Tips

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

GO TO STEP 19 Click here

INSPECT EGR VALVE ASSEMBLY

Remove the EGR valve assembly.

Click here

Check if the EGR valve is stuck open.

OK
EGR valve is tightly closed.

Tech Tips

Perform "Inspection After Repair" after replacing the EGR valve assembly.

Click here

Result

Proceed to
OK
NG

REPLACE EGR VALVE ASSEMBLY Click here

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

*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.

Tech Tips

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.

Tech Tips

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

GO TO STEP 23 Click here

CHECK ENGINE MECHANICAL SYSTEM

Check for mechanical malfunctions that affect the valve timing, such as a jumped tooth or stretching of the timing chain.

Tech Tips

Perform "Inspection After Repair" after repairing or replacing the engine mechanical system.

Click here

Result

Proceed to
OK
NG

REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA

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

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

Result

Proceed to
NEXT

CONFIRM 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
Input the DTC: P030000, P030027, P030085, P030100, P030200, P030300 or P030400.

Check the DTC judgment result.

Result

Proceed to

NORMAL

(DTCs are not output)

ABNORMAL

(DTC P030000, P030027, P030085, P030100, P030200, P030300 and/or P030400 is output)

CHECK FOR INTERMITTENT PROBLEMS Click here

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 here

Tech Tips

Repair any problems.

Result

Proceed to
NEXT

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

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

Result

Proceed to
NEXT

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
Input the DTC: P030000, P030027, P030085, P030100, P030200, P030300 or P030400.

Check the DTC judgment result.

Result

Proceed to

NORMAL

(DTCs are not output)

ABNORMAL

(DTC P030000, P030027, P030085, P030100, P030200, P030300 and/or P030400 is output)

END

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
C30-3 (5V) - C57-78 (VCVG)	Always	Below 1 Ω
C30-1 (FG) - C57-101 (VG)	Always	Below 1 Ω
C30-2 (E2G) - C57-79 (E2G)	Always	Below 1 Ω
C30-3 (5V) or C57-78 (VCVG) - Body ground and other terminals	Always	10 kΩ or higher
C30-1 (FG) or C57-101 (VG) - Body ground and other terminals	Always	10 kΩ or higher
C30-2 (E2G) or C57-79 (E2G) - Body ground and other terminals	Always	10 kΩ or higher

Result

Proceed to
OK
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

REPLACE MASS AIR FLOW METER SUB-ASSEMBLY

Replace the mass air flow meter sub-assembly.

Click here

Tech Tips

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 here

Result

Proceed to
NEXT

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

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

Result

Proceed to
NEXT

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
Input the DTC: P030000, P030027, P030085, P030100, P030200, P030300 or P030400.

Check the DTC judgment result.

Result

Proceed to

NORMAL

(DTCs are not output)

ABNORMAL

(DTC P030000, P030027, P030085, P030100, P030200, P030300 and/or P030400 is output)

END

REPLACE ECM Click here