SFI SYSTEM, Diagnostic DTC:P0300, P0301, P0302, P0303, P0304, P0305, P0306

DTC Code	DTC Name
P0300	Random / Multiple Cylinder Misfire Detected
P0301	Cylinder 1 Misfire Detected
P0302	Cylinder 2 Misfire Detected
P0303	Cylinder 3 Misfire Detected
P0304	Cylinder 4 Misfire Detected
P0305	Cylinder 5 Misfire Detected
P0306	Cylinder 6 Misfire Detected

DESCRIPTION

Text in Illustration
*1	VVT Sensor
*2	Crankshaft Position Sensor
*3	ECM

When the engine misfires, high concentrations of hydrocarbons (HC) enter the exhaust gas. Extremely high hydrocarbon concentration levels can cause increases in exhaust emission levels. 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 these increases 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 VVT sensor and the crankshaft position sensor. The VVT 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 level and could cause emission deterioration, the ECM illuminates the MIL and sets a DTC.

DTC No.	DTC Detection Condition	Trouble Area
P0300	Simultaneous misfiring of several cylinders occurs and one of the following conditions is detected (2 trip detection logic): High temperature misfire occurs in three-way catalytic converter (MIL blinks when detect immediately). Emission deterioration misfire occurs (MIL illuminates).	Open or short in engine wire harness Connector connections Vacuum hose connections Ignition system 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 ECM
P0301 P0302 P0303 P0304 P0305 P0306	Misfiring of specific cylinder occurs and one of the following conditions is detected (2 trip detection logic): High temperature misfire occurs in three-way catalytic converter (MIL blinks when detect immediately). Emission deterioration misfire occurs (MIL illuminates).

DTC No.

DTC Detection Condition

Trouble Area

P0300

Simultaneous misfiring of several cylinders occurs and one of the following conditions is detected

(2 trip detection logic):

High temperature misfire occurs in three-way catalytic converter (MIL blinks when detect immediately).
Emission deterioration misfire occurs (MIL illuminates).

Open or short in engine wire harness
Connector connections
Vacuum hose connections
Ignition system
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
ECM

P0301

P0302

P0303

P0304

P0305

P0306

Misfiring of specific cylinder occurs and one of the following conditions is detected

(2 trip detection logic):

High temperature misfire occurs in three-way catalytic converter (MIL blinks when detect immediately).
Emission deterioration misfire occurs (MIL illuminates).

When DTCs for misfiring cylinders are randomly set, but DTC P0300 is not set, it indicates that misfires have been detected in different cylinders at different times. DTC P0300 is only set when several misfiring cylinders are detected at the same time.

MONITOR DESCRIPTION

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

Within the first 1000 crankshaft revolutions of the engine starting, an excessive misfiring rate (approximately 20 to 50 misfires per 1000 crankshaft revolutions) occurs once.
After the first 1000 crankshaft revolutions, an excessive misfiring rate (approximately 20 to 60 misfires per 1000 crankshaft revolutions) occurs 4 times in sequential crankshaft revolutions.

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

In every 200 crankshaft revolutions at a high engine speed, the threshold misfiring percentage is recorded once.
In every 200 crankshaft revolutions at a normal engine speed, the threshold misfiring percentage is recorded 3 times.

WIRING DIAGRAM

Refer to DTC P0102 Click here.

Refer to Fuel Injector Circuit Click here.

CONFIRMATION DRIVING PATTERN

Connect the intelligent tester to the DLC3.
Turn the engine switch on (IG).
Turn the tester on.
Record the DTC(s) and freeze frame data.
Clear the DTCs (even if no DTCs are stored, perform the Clear DTC procedure) Click here.
Using the tester, switch the ECM from normal mode to check mode Click here.
Read the misfire counts of each cylinder (Cylinder #1 (to #6) Misfire Count) 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, using the Misfire RPM and Misfire Load in the Data List.

Engine Speed	Duration
Idling	8 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 pending DTCs and freeze frame data.

Tech Tips

Do not turn the engine switch off until the stored 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 will be cleared.
Record the pending DTC(s), freeze frame data and misfire counts.
Turn the engine switch off and wait for at least 30 seconds.
Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure) Click here.

INSPECTION PROCEDURE

Tech Tips

If any DTCs other than misfire DTCs are output, troubleshoot those DTCs first.
Read freeze frame data using the intelligent tester. 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.
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:

There was insufficient fuel volume in the tank.
Improper fuel is used.
The spark plugs have been contaminated.

After finishing repairs, check the misfire counts of the cylinders (Cylinder #1 Misfire Count to Cylinder #6 Misfire Count).
Be sure to confirm that no misfiring cylinder DTCs are set again by conducting the confirmation driving pattern after finishing repairs.
For 6 cylinder engine, the ECM intentionally does not set the specific misfiring cylinder DTCs at high engine speed. If misfires occur only in high engine speed areas, only DTC P0300 is set.

In the event of DTC P0300 being present, perform the following operations:

Clear the DTC Click here.
Start the engine and conduct the confirmation driving pattern.
Read the misfiring of each cylinder or DTC(s) using the intelligent tester.
Repair the cylinder(s) that has a high misfiring or is indicated by the DTC.
After finishing repairs, conduct the confirmation driving pattern again, in order to verify that DTC P0300 is not set.

When one of Short FT #1, Long FT #1, Short FT #2 or Long FT #2 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 more).
When the Coolant Temp in the freeze frame data is less than 75°C (167°F), the misfires have occurred only while the engine is being warmed up.
An extremely imbalanced drive wheel which causes body vibration may cause misfire DTCs detection.

PROCEDURE

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

Connect the intelligent tester to the DLC3.
Turn the engine switch on (IG).
Turn the tester on.
Enter the following menus: Powertrain / Engine / DTC.

Read the DTCs.

Result

Result	Proceed to
DTC P0300, P0301, P0302, P0303, P0304, P0305 and/or P0306 are output	A
DTC P0300, P0301, P0302, P0303, P0304, P0305 and/or P0306 and other DTCs are output	B

Tech Tips

If any DTCs other than P0300, P0301, P0302, P0303, P0304, P0305 and/or P0306 are output, troubleshoot those DTCs first.

GO TO DTC CHART Click here

CHECK PCV HOSE (HOSE CONNECTIONS)
1. Check the PCV hose connections Click here.
  
  OK
  
  PCV hose is connected correctly and is not damaged.
NG
REPAIR OR REPLACE PCV HOSE

OK
READ VALUE USING INTELLIGENT TESTER (MISFIRE RPM AND MISFIRE LOAD)
1. Connect the intelligent tester to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the tester on.
4. Enter the following menus: Powertrain / Engine / Data List / All Data / Misfire RPM and Misfire Load.
5. 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.
NEXT

OK
PCV hose is connected correctly and is not damaged.

READ VALUE USING INTELLIGENT TESTER (CATALYST OT MF F/C)

Connect the intelligent tester to the DLC3.
Turn the engine switch on (IG).
Turn the tester on.
Enter the following menus: Powertrain / Engine / Data List / All Data / Catalyst OT MF F/C.

Read the value displayed on the tester.

Result

Data List	Tester Display	Proceed to
Catalyst OT MF F/C	Avail	A
Catalyst OT MF F/C	Not Avl	B

READ VALUE USING INTELLIGENT TESTER (CYLINDER MISFIRE COUNT) Click here

PERFORM ACTIVE TEST USING INTELLIGENT TESTER
1. Connect the intelligent tester to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the tester on.
4. Enter the following menus: Powertrain / Engine / Active Test / Prohibit the Catalyst OT Misfire Prevent F/C.
5. Perform the Active Test.
  
  Note
  
  When performing the Active Test, make sure that the vehicle is stopped and either idling or being revved within 3000 rpm.
NEXT

READ VALUE USING INTELLIGENT TESTER (CYLINDER MISFIRE COUNT)

Connect the intelligent tester to the DLC3.
Turn the engine switch on (IG).
Turn the tester on.
Enter the following menus: Powertrain / Engine / Data List / All Data / Cylinder #1 Misfire Count, Cylinder #2 Misfire Count, Cylinder #3 Misfire Count, Cylinder #4 Misfire Count, Cylinder #5 Misfire Count and Cylinder #6 Misfire Count.
Start the engine and allow the engine to idle.
Read each value for Cylinder #1 Misfire Count to Cylinder #6 Misfire Count displayed on the tester. 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 Intelligent Tester (Misfire RPM And Misfire Load)" procedures above [A].

Read the Cylinder #1 Misfire Count to Cylinder #6 Misfire Count or DTCs displayed on the tester [B].

Result

Result	Proceed to
Most misfires occur in only 1 or 2 cylinders	A
3 cylinders or more have equal misfire counts	B

Tech Tips

If it is difficult to reproduce misfires for each cylinder, check the Data List item called Misfire Margin. Try to find vehicle driving conditions that lower the Misfire Margin value. Values above 30% are considered normal.
If the freeze frame data record of the engine coolant temperature is below 75°C (167°F), the misfire may be detected only when the engine is cold.
If the freeze frame data record of the Engine Run Time is below 120 seconds, the misfire may be detected immediately after the engine is started.

CHECK INTAKE SYSTEM Click here

INSPECT SPARK PLUG
1. Inspect the spark plug of the misfiring cylinder Click here.
NG
REPLACE SPARK PLUG Click here

OK
CHECK FOR SPARK (SPARK TEST)
1. Perform a spark test Click here.
  
  CAUTION:
  
  During the test, disconnect all fuel injector assembly connectors.
  
  Note
  
  Do not crank the engine for more than 2 seconds.
  
  OK
  
  Spark jumps across electrode gap.
NG
CHANGE TO KNOWN GOOD SPARK PLUG AND CHECK SPARK OF MISFIRING CYLINDER Click here

OK
CHECK CYLINDER COMPRESSION PRESSURE
1. Measure the cylinder compression pressure of the misfiring cylinder Click here.
NG
CHECK ENGINE TO DETERMINE CAUSE OF LOW COMPRESSION

OK

OK
Spark jumps across electrode gap.

CHECK ECM TERMINAL VOLTAGE (#10, #20, #30, #40, #50 AND/OR #60)

Text in Illustration

*1
Front view of wire harness connector

(to ECM)

Disconnect the ECM connector.
Turn the engine switch on (IG).

Text in Illustration
*1	Front view of wire harness connector (to ECM)

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

Standard Voltage

Tester Connection	Condition	Specified Condition
D1-86 (#10) - D1-43 (E01)	Engine switch on (IG)	11 to 14 V
D1-109 (#20) - D1-43 (E01)	Engine switch on (IG)	11 to 14 V
D1-85 (#30) - D1-43 (E01)	Engine switch on (IG)	11 to 14 V
D1-108 (#40) - D1-43 (E01)	Engine switch on (IG)	11 to 14 V
D1-84 (#50) - D1-43 (E01)	Engine switch on (IG)	11 to 14 V
D1-107 (#60) - D1-43 (E01)	Engine switch on (IG)	11 to 14 V

Reconnect the ECM connector.

GO TO FUEL INJECTOR CIRCUIT Click here

CHECK FUEL INJECTOR ASSEMBLY OF MISFIRING CYLINDER
1. Check the fuel injector assembly injection (whether fuel volume is high or low, and whether injection pattern is poor) Click here.
NG
REPLACE FUEL INJECTOR ASSEMBLY Click here

OK
CHECK INTAKE SYSTEM
1. Check the intake system for vacuum leaks Click here.
  
  OK
  
  No leaks in intake system.
NG
REPAIR OR REPLACE INTAKE SYSTEM

OK
CHECK FUEL PRESSURE
1. Check the fuel pressure Click here.
NG
CHECK FUEL LINE Click here

OK

OK
No leaks in intake system.

READ VALUE USING INTELLIGENT TESTER (COOLANT TEMP)

Connect the intelligent tester to the DLC3.
Turn the engine switch on (IG).
Turn the tester on.
Enter the following menus: Powertrain / Engine / Data List / All Data / Coolant Temp.

Read the Coolant Temp twice when the engine is both cold and warmed up.

Standard

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

REPLACE ENGINE COOLANT TEMPERATURE SENSOR Click here

READ VALUE USING INTELLIGENT TESTER (MAF)

Connect the intelligent tester to the DLC3.
Turn the engine switch on (IG).
Turn the tester on.
Enter the following menus: Powertrain / Engine / Data List / All Data / MAF, Coolant Temp and Engine Speed.
Allow the engine to idle until Coolant Temp reaches 75°C (167°F) or higher.

Read MAF with the engine speed at 3000 rpm.

Standard

Tester Display

Condition

Specified Condition

MAF

Shift lever position: N

A/C: Off

Engine Speed: 3000 rpm

Between 11 gm/sec and 16 gm/sec

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

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

Text in Illustration

*1 Timing Mark

Remove the cylinder head cover sub-assemblies RH and LH.
Turn the crankshaft to align the timing marks of the crankshaft.
Align the notch of the crankshaft pulley to the "0" position.
Check if the timing marks of the camshaft pulley and camshaft bearing cap align.

Text in Illustration
*1	Timing Mark

Turn the crankshaft clockwise 360° if the timing marks do not align. Check if they align once again.

OK
The timing marks of the camshaft pulley and the camshaft bearing cap align when the notch of the crankshaft pulley is in the "0" position.

Reinstall the cylinder head cover sub-assemblies RH and LH.

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

ADJUST VALVE TIMING Click here

CHECK INTAKE SYSTEM
1. Check the intake system for vacuum leaks Click here.
  
  OK
  
  No leaks in intake system.
NG
REPAIR OR REPLACE INTAKE SYSTEM

OK
CHECK FUEL PRESSURE
1. Check the fuel pressure Click here.
NG
CHECK FUEL LINE Click here

OK

READ VALUE USING INTELLIGENT TESTER (COOLANT TEMP)

Connect the intelligent tester to the DLC3.
Turn the engine switch on (IG).
Turn the tester on.
Enter the following menus: Powertrain / Engine / Data List / All Data / Coolant Temp.

Read the Coolant Temp twice when the engine is both cold and warmed up.

Standard

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

REPLACE ENGINE COOLANT TEMPERATURE SENSOR Click here

READ VALUE USING INTELLIGENT TESTER (MAF)

Connect the intelligent tester to the DLC3.
Turn the engine switch on (IG).
Turn the tester on.
Enter the following menus: Powertrain / Engine / Data List / All Data / MAF, Coolant Temp and Engine Speed.
Allow the engine to idle until Coolant Temp reaches 75°C (167°F) or higher.

Read MAF with the engine speed at 3000 rpm.

Standard

Tester Display

Condition

Specified Condition

MAF

Shift lever position: N

A/C: Off

Engine Speed: 3000 rpm

Between 11 gm/sec and 16 gm/sec

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

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

Text in Illustration

*1 Timing Mark

Remove the cylinder head cover sub-assemblies RH and LH.
Turn the crankshaft to align the timing marks of the crankshaft.
Align the notch of the crankshaft pulley to the "0" position.
Check if the timing marks of the camshaft pulley and camshaft bearing cap align.

Turn the crankshaft clockwise 360° if the timing marks do not align. Check if they align once again.

OK
The timing marks of the camshaft pulley and the camshaft bearing cap align when the notch of the crankshaft pulley is in the "0" position.

Reinstall the cylinder head cover sub-assemblies RH and LH.

ADJUST VALVE TIMING Click here

INSPECT SPARK PLUG
1. Inspect the spark plug of the misfiring cylinder Click here.
NG
REPLACE SPARK PLUG Click here

OK
CHECK FOR SPARK (SPARK TEST)
1. Perform a spark test Click here.
  
  CAUTION:
  
  During the test, disconnect all fuel injector assembly connectors.
  
  Note
  
  Do not crank the engine for more than 2 seconds.
  
  OK
  
  Spark jumps across electrode gap.
NG
CHANGE TO KNOWN GOOD SPARK PLUG AND CHECK SPARK OF MISFIRING CYLINDER Click here

OK
CHECK CYLINDER COMPRESSION PRESSURE
1. Measure the cylinder compression pressure of the misfiring cylinder Click here.
NG
CHECK ENGINE TO DETERMINE CAUSE OF LOW COMPRESSION

OK

CHECK ECM TERMINAL VOLTAGE (#10, #20, #30, #40, #50 AND/OR #60)

Text in Illustration

*1
Front view of wire harness connector

(to ECM)

Disconnect the ECM connector.
Turn the engine switch on (IG).

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

Standard Voltage

Tester Connection	Switch Condition	Specified Condition
D1-86 (#10) - D1-43 (E01)	Engine switch on (IG)	11 to 14 V
D1-109 (#20) - D1-43 (E01)	Engine switch on (IG)	11 to 14 V
D1-85 (#30) - D1-43 (E01)	Engine switch on (IG)	11 to 14 V
D1-108 (#40) - D1-43 (E01)	Engine switch on (IG)	11 to 14 V
D1-84 (#50) - D1-43 (E01)	Engine switch on (IG)	11 to 14 V
D1-107 (#60) - D1-43 (E01)	Engine switch on (IG)	11 to 14 V

Reconnect the ECM connector.

GO TO FUEL INJECTOR CIRCUIT Click here

CHECK FUEL INJECTOR ASSEMBLY OF MISFIRING CYLINDER
1. Check the fuel injector assembly injection (whether fuel volume is high or low, and whether injection pattern is poor) Click here.
NG
REPLACE FUEL INJECTOR ASSEMBLY Click here

OK
CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER SUB-ASSEMBLY CONNECTOR CONNECTION)
1. Check the connection and terminal contact pressure of connectors and wire harnesses between the mass air flow meter and ECM Click here.
  
  Tech Tips
  
  Repair any problems.
NEXT

CHECK WHETHER DTC OUTPUT RECURS (MISFIRE DTCS)

Connect the intelligent tester to the DLC3.
Turn the engine switch on (IG).
Turn the tester on.
Clear the DTCs Click here.
Turn the engine switch off.
Turn the engine switch on (IG) and turn the tester on.
Start the engine and warm it up.
Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
Enter the following menus: Powertrain / Engine / Utility / All Readiness.
Input the DTC: P0300, P0301, P0302, P0303, P0304, P0305 or P0306.

Check the DTC judgment result.

Result
Result	Proceed to
ABNORMAL (DTC P0300, P0301, P0302, P0303, P0304, P0305 or P0306 is output)	A
NORMAL (DTC is not output)	B

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 (Check for Open)

Tester Connection	Condition	Specified Condition
D3-5 (VG) - D1-74 (VG)	Always	Below 1 Ω
D3-4 (E2G) - D1-75 (E2G)	Always	Below 1 Ω

Standard Resistance (Check for Short)

Tester Connection	Condition	Specified Condition
D3-5 (VG) or D1-74 (VG) - Body ground	Always	10 kΩ or higher

Text in Illustration
*1	Front view of wire harness connector (to Mass Air Flow Meter Sub-assembly)	*2	Front view of wire harness connector (to ECM)

Reconnect the mass air flow meter sub-assembly connector.
Reconnect the ECM connector.

REPAIR OR REPLACE HARNESS OR CONNECTOR (MASS AIR FLOW METER SUB-ASSEMBLY - ECM)

REPLACE MASS AIR FLOW METER SUB-ASSEMBLY
1. Replace the mass air flow meter sub-assembly Click here.
  
  Tech Tips
  
  If the results of the inspections performed in steps 15 and 20 indicated no problem, proceed to the next step without replacing the mass air flow meter.
NEXT

CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

Connect the intelligent tester to the DLC3.
Turn the engine switch on (IG).
Turn the tester on.
Clear the DTCs Click here.
Turn the engine switch off.
Turn the engine switch on (IG) and turn the tester on.
Start the engine and warm it up.
Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
Enter the following menus: Powertrain / Engine / Utility / All Readiness.
Input the DTC: P0300, P0301, P0302, P0303, P0304, P0305 or P0306.

Check the DTC judgment result.

Result
Result	Proceed to
NORMAL (DTC is not output)	A
ABNORMAL (DTC P0300, P0301, P0302, P0303, P0304, P0305 or P0306 is output)	B

REPLACE ECM Click here

END

CHANGE TO KNOWN GOOD SPARK PLUG AND CHECK SPARK OF MISFIRING CYLINDER
1. Change the installed spark plug to a known good spark plug.
2. Perform a spark test.
  
  CAUTION:
  
  During the test, disconnect all fuel injector assembly connectors.
  
  Note
  
  Do not crank the engine for more than 2 seconds.
  1. Remove the ignition coil assembly from the cylinder head.
  2. Install the spark plug onto the ignition coil assembly.
  3. Disconnect the 6 fuel injector assembly connectors.
  4. Touch the spark plug to the cylinder head.
  5. Crank the engine for less than 2 seconds and check for spark.
    
    OK
    
    Spark jumps across electrode gap.
  6. Reconnect the 6 fuel injector assembly connectors.
  7. Reinstall the ignition coil assembly.
NG
CHANGE TO KNOWN GOOD IGNITION COIL ASSEMBLY AND CHECK SPARK OF MISFIRING CYLINDER Click here

OK

REPLACE SPARK PLUG Click here
CHANGE TO KNOWN GOOD IGNITION COIL ASSEMBLY AND CHECK SPARK OF MISFIRING CYLINDER
1. Change the installed ignition coil assembly to a known good ignition coil assembly.
2. Perform a spark test.
  
  CAUTION:
  
  During the test, disconnect all fuel injector assembly connectors.
  
  Note
  
  Do not crank the engine for more than 2 seconds.
  1. Remove the ignition coil assembly from the cylinder head.
  2. Install the spark plug onto the ignition coil assembly.
  3. Disconnect the 6 fuel injector assembly connectors.
  4. Touch the spark plug to the cylinder head.
  5. Crank the engine for less than 2 seconds and check for spark.
    
    OK
    
    Spark jumps across electrode gap.
  6. Reconnect the 6 fuel injector assembly connectors.
  7. Reinstall the ignition coil assembly.
NG
REPLACE ECM Click here

OK

REPLACE IGNITION COIL ASSEMBLY Click here
CHECK FUEL LINE
1. Check the fuel lines for leaks or blockage.
NG
REPAIR OR REPLACE FUEL LINE

OK

REPLACE FUEL PUMP Click here