SFI SYSTEM(w/ EGR System), Diagnostic DTC:P0300,P0301,P0302,P0303,P0304,P0305,P0306,P0307 and P0308

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
P0307 Cylinder 7 Misfire Detected
P0308 Cylinder 8 Misfire Detected

DESCRIPTION

A093767C01

*1

Camshaft Position Sensor

*2

Crankshaft Position Sensor

*3

ECM

When the engine misfires, high concentrations of hydrocarbons (HC) enter the exhaust gas. Extremely high HC concentration levels can cause increases in exhaust emissions levels. High concentrations of HC can also cause increases in the Three-way Catalytic Converter (TWC) temperature, which may cause damage to the Three-way Catalytic Converter (TWC). To prevent these increases in emissions and to limit the possibility of thermal damage, the ECM monitors the misfire rate. When the temperature of the Three-way Catalytic Converter (TWC) reaches the point of thermal degradation, the MIL blinks. 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 as when the crankshaft rotation speed variations exceed predetermined thresholds.

If the misfire rate exceeds the threshold level, the ECM illuminates the MIL and stores a DTC.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Warning Indicate

Memory

P0300

Random / Multiple Cylinder Misfire Detected

Simultaneous misfiring of several cylinders occurs and one of the following conditions below is detected (2 trip detection logic):

  • High temperature misfire occurs in the Three-way Catalytic Converter (TWC) (MIL blinks).

  • Catalyst deterioration misfire occurs (MIL illuminates).

  • Open or short in engine wire harness

  • Connector connection

  • Vacuum hose connections

  • Ignition system

  • Fuel injector assembly

  • Fuel pressure

  • Mass air flow meter assembly

  • Engine coolant temperature sensor

  • Compression pressure

  • Valve timing

  • PCV valve and hose

  • PCV hose connections

  • Air induction system

  • EGR valve assembly

  • ECM

Comes on/blinks (The MIL flashes when catalyst-damaging misfire is detected.)

DTC stored

P0301

Cylinder 1 Misfire Detected

Misfiring of specific cylinder occurs and one of the following conditions below is detected (2 trip detection logic):

  • High temperature misfire occurs in the Three-way Catalytic Converter (TWC) (MIL blinks).

  • Catalyst deterioration misfire occurs (MIL illuminates).

  • Open or short in engine wire harness

  • Connector connection

  • Vacuum hose connections

  • Ignition system

  • Fuel injector assembly

  • Fuel pressure

  • Mass air flow meter assembly

  • Engine coolant temperature sensor

  • Compression pressure

  • Valve timing

  • PCV valve and hose

  • PCV hose connections

  • Air induction system

  • EGR valve assembly

  • ECM

Comes on/blinks (The MIL flashes when catalyst-damaging misfire is detected.)

DTC stored

P0302

Cylinder 2 Misfire Detected

Misfiring of specific cylinder occurs and one of the following conditions below is detected (2 trip detection logic):

  • High temperature misfire occurs in the Three-way Catalytic Converter (TWC) (MIL blinks).

  • Catalyst deterioration misfire occurs (MIL illuminates).

  • Open or short in engine wire harness

  • Connector connection

  • Vacuum hose connections

  • Ignition system

  • Fuel injector assembly

  • Fuel pressure

  • Mass air flow meter assembly

  • Engine coolant temperature sensor

  • Compression pressure

  • Valve timing

  • PCV valve and hose

  • PCV hose connections

  • Air induction system

  • EGR valve assembly

  • ECM

Comes on/blinks (The MIL flashes when catalyst-damaging misfire is detected.)

DTC stored

P0303

Cylinder 3 Misfire Detected

Misfiring of specific cylinder occurs and one of the following conditions below is detected (2 trip detection logic):

  • High temperature misfire occurs in the Three-way Catalytic Converter (TWC) (MIL blinks).

  • Catalyst deterioration misfire occurs (MIL illuminates).

  • Open or short in engine wire harness

  • Connector connection

  • Vacuum hose connections

  • Ignition system

  • Fuel injector assembly

  • Fuel pressure

  • Mass air flow meter assembly

  • Engine coolant temperature sensor

  • Compression pressure

  • Valve timing

  • PCV valve and hose

  • PCV hose connections

  • Air induction system

  • EGR valve assembly

  • ECM

Comes on/blinks (The MIL flashes when catalyst-damaging misfire is detected.)

DTC stored

P0304

Cylinder 4 Misfire Detected

Misfiring of specific cylinder occurs and one of the following conditions below is detected (2 trip detection logic):

  • High temperature misfire occurs in the Three-way Catalytic Converter (TWC) (MIL blinks).

  • Catalyst deterioration misfire occurs (MIL illuminates).

  • Open or short in engine wire harness

  • Connector connection

  • Vacuum hose connections

  • Ignition system

  • Fuel injector assembly

  • Fuel pressure

  • Mass air flow meter assembly

  • Engine coolant temperature sensor

  • Compression pressure

  • Valve timing

  • PCV valve and hose

  • PCV hose connections

  • Air induction system

  • EGR valve assembly

  • ECM

Comes on/blinks (The MIL flashes when catalyst-damaging misfire is detected.)

DTC stored

P0305

Cylinder 5 Misfire Detected

Misfiring of specific cylinder occurs and one of the following conditions below is detected (2 trip detection logic):

  • High temperature misfire occurs in the Three-way Catalytic Converter (TWC) (MIL blinks).

  • Catalyst deterioration misfire occurs (MIL illuminates).

  • Open or short in engine wire harness

  • Connector connection

  • Vacuum hose connections

  • Ignition system

  • Fuel injector assembly

  • Fuel pressure

  • Mass air flow meter assembly

  • Engine coolant temperature sensor

  • Compression pressure

  • Valve timing

  • PCV valve and hose

  • PCV hose connections

  • Air induction system

  • EGR valve assembly

  • ECM

Comes on/blinks (The MIL flashes when catalyst-damaging misfire is detected.)

DTC stored

P0306

Cylinder 6 Misfire Detected

Misfiring of specific cylinder occurs and one of the following conditions below is detected (2 trip detection logic):

  • High temperature misfire occurs in the Three-way Catalytic Converter (TWC) (MIL blinks).

  • Catalyst deterioration misfire occurs (MIL illuminates).

  • Open or short in engine wire harness

  • Connector connection

  • Vacuum hose connections

  • Ignition system

  • Fuel injector assembly

  • Fuel pressure

  • Mass air flow meter assembly

  • Engine coolant temperature sensor

  • Compression pressure

  • Valve timing

  • PCV valve and hose

  • PCV hose connections

  • Air induction system

  • EGR valve assembly

  • ECM

Comes on/blinks (The MIL flashes when catalyst-damaging misfire is detected.)

DTC stored

P0307

Cylinder 7 Misfire Detected

Misfiring of specific cylinder occurs and one of the following conditions below is detected (2 trip detection logic):

  • High temperature misfire occurs in the Three-way Catalytic Converter (TWC) (MIL blinks).

  • Catalyst deterioration misfire occurs (MIL illuminates).

  • Open or short in engine wire harness

  • Connector connection

  • Vacuum hose connections

  • Ignition system

  • Fuel injector assembly

  • Fuel pressure

  • Mass air flow meter assembly

  • Engine coolant temperature sensor

  • Compression pressure

  • Valve timing

  • PCV valve and hose

  • PCV hose connections

  • Air induction system

  • EGR valve assembly

  • ECM

Comes on/blinks (The MIL flashes when catalyst-damaging misfire is detected.)

DTC stored

P0308

Cylinder 8 Misfire Detected

Misfiring of specific cylinder occurs and one of the following conditions below is detected (2 trip detection logic):

  • High temperature misfire occurs in the Three-way Catalytic Converter (TWC) (MIL blinks).

  • Catalyst deterioration misfire occurs (MIL illuminates).

  • Open or short in engine wire harness

  • Connector connection

  • Vacuum hose connections

  • Ignition system

  • Fuel injector assembly

  • Fuel pressure

  • Mass air flow meter assembly

  • Engine coolant temperature sensor

  • Compression pressure

  • Valve timing

  • PCV valve and hose

  • PCV hose connections

  • Air induction system

  • EGR valve assembly

  • ECM

Comes on/blinks (The MIL flashes when catalyst-damaging misfire is detected.)

DTC stored

When multiple DTCs for misfiring cylinders are stored, but DTC P0300 is not stored, it indicates that misfires have been detected in different cylinders at different times. DTC P0300 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 condition, which could cause catalyst deterioration, is detected (2 trip detection logic).

  • An excessive misfiring rate (approximately 20 to 50 misfires per 1000 crankshaft revolutions) occurs a total of 4 times.

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

  • 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 and camshaft position sensor

Required Sensors/Components (Related)

Engine coolant temperature, intake air temperature sensors and mass air flow meter

Frequency of Operation

Continuous

TYPICAL ENABLING CONDITIONS

Table 1. Misfire

Intake air temperature

Higher than -10°C (14°F)

Either of following conditions (a) or (b) met

-

(a) Engine coolant temperature at engine start

Higher than -7°C (19°F)

(b) Engine coolant temperature

Higher than 20°C (68°F)
Table 2. Monitor Period of Emission-Related-Misfire

Duration

1000 crankshaft revolutions x 4
Table 3. Monitor Period of Catalyst-Damaged-Misfire (MIL Blinks)

Duration

200 crankshaft revolutions x 3

WIRING DIAGRAM

A231457E04
A232055E04
A232056E04

CONFIRMATION DRIVING PATTERN

  1. Connect the intelligent tester to the DLC3.

  2. Turn the engine switch on (IG).

  3. Turn the tester on.

  4. Record the DTC(s) and freeze frame data.

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

  6. Using the intelligent tester, switch the ECM from normal mode to check mode.

    Click here

  7. Read the misfire counts of each cylinder (cylinder No. 1 to No. 8) with the engine idling. If any misfire count is displayed, skip the following confirmation driving pattern.

  8. Drive the vehicle several times with the conditions, such as engine speed and engine load, as shown in Misfire RPM and Misfire Load in the freeze frame data.

    Tip:

    In order to store misfire DTCs, it is necessary to operate the vehicle for the period of time shown in the table below with the engine speed and engine load the same as Misfire RPM and Misfire Load in the freeze frame data.

    Engine Speed

    Duration

    Idling

    7.0 minutes or more

    1000

    4.0 minutes or more

    2000

    2.0 minutes or more

    3000

    1.5 minutes or more

  9. Check whether misfires have occurred by checking DTCs and freeze frame data.

    Tip:

    Do not turn the engine switch off until the stored DTCs and freeze frame data have been recorded. When the ECM returns to normal mode (default), the stored DTCs, freeze frame data and other data will be cleared.

  10. Record the DTCs, freeze frame data and misfire counts.

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

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

CAUTION / NOTICE / HINT

Tip:

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

  • Read freeze frame data using the intelligent tester. Freeze frame data records the engine condition when malfunctions are detected. 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 may be a cause of the problem:

    1. The fuel level is low.

    2. Improper fuel is being used.

    3. The spark plugs are dirty.

  • After finishing repairs, check that no misfires occur in each cylinder (cylinder No. 1, No. 2, No. 3, No. 4, No. 5, No. 6, No. 7 and No. 8).

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

  • For 6 and 8 cylinder engines, the ECM intentionally does not store the specific misfiring cylinder DTCs at high engine speed. If misfires only occur during high engine speed driving, only DTC P0300 is stored.

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

    1. Clear the DTCs.

      Click here

    2. Start the engine and conduct the confirmation driving pattern.

    3. Read the misfiring rates of each cylinder or the DTCs using the intelligent tester.

    4. Repair the cylinders that have a high misfiring rate or are indicated by the DTCs.

    5. After finishing repairs, conduct the confirmation driving pattern again in order to verify that DTC P0300 is not stored.

  • 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 Coolant Temp in the freeze frame data is below 75°C (167°F), the misfires may have occurred only while warming up the engine.

  • An extremely imbalanced drive wheel which causes body vibration may cause misfire DTCs to be stored.

PROCEDURE

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

    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 and ECT/ DTC.

    5. Read DTCs.

      Powertrain > Engine and ECT > Trouble Codes

      Result

      Result

      Proceed to

      P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307 and/or P0308 is output

      A

      P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307 and/or P0308 and other DTCs are output

      B
      Tip:

      If any DTCs other than P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307 and P0308 are output, troubleshoot those DTCs first.

    B

    GO TO DTC CHART

    Click hereClick here

    A

  2. CHECK PCV HOSE CONNECTIONS

    1. Check the PCV hose connections.

      Click here

      OK

      PCV hose is connected correctly and is not damaged.

      Result

      Result

      OK

      NG
    NG

    REPAIR OR REPLACE PCV HOSE

    Click here

    OK

  3. 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 and ECT / Data List / All Data / Misfire RPM and Misfire Load.

      Powertrain > Engine and ECT > Data List

      Tester Display

      Misfire RPM

      Misfire Load

    5. Read and note the Misfire RPM and Misfire Load values.

      Tip:

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

      Result

      Result

      NEXT
    NEXT

  4. READ VALUE USING INTELLIGENT TESTER (MISFIRE COUNT)

    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the tester on.

    4. Clear DTCs.

      Click here

      Powertrain > Engine and ECT > Clear DTCs

    5. Enter the following menus: Powertrain / Engine and ECT / Data List / All Data / Cylinder #1 Misfire Rate, #2, #3, #4, #5, #6, #7 and #8.

      Powertrain > Engine and ECT > Data List

      Tester Display

      Cylinder #1 Misfire Count

      Cylinder #2 Misfire Count

      Cylinder #3 Misfire Count

      Cylinder #4 Misfire Count

      Cylinder #5 Misfire Count

      Cylinder #6 Misfire Count

      Cylinder #7 Misfire Count

      Cylinder #8 Misfire Count

    6. Allow the engine to idle.

    7. Read each value for CYL #1 to #8 (Cylinder #1 Misfire Rate to #8) displayed on the tester. If no misfire counts occur in any cylinders, perform the following procedures:

      1. Move the shift lever to D.

      2. Check CYL #1 to #8 (Cylinder #1 Misfire Rate to #8).

      3. If misfire counts are still not displayed, perform procedure "A" and "B", and then check the misfire counts again.

        Procedure A: Drive the vehicle while satisfying the Misfire RPM and Misfire Load values noted in the "Read Value Using intelligent tester (Misfire RPM and Misfire Load)" procedure above.

        Procedure B: Read CYL #1 to #8 (Cylinder #1 Misfire Rate to #8) or the DTCs output on the intelligent tester.

        Result

        Result

        Proceed to

        Most misfires occur in only 1 or 2 cylinders

        A

        3 cylinders or more have equal misfire counts

        B
        Tip:

        • 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's 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's record of the Engine Run Time is less than 120 seconds, the misfire may be detected immediately after the engine is started.

    B

    CHECK AIR INDUCTION SYSTEMClick here

    A

  5. INSPECT SPARK PLUG

    1. Inspect the spark plug of the misfiring cylinder.

      Click here

      Result

      Result

      OK

      NG
    NG

    REPLACE SPARK PLUG

    Click here

    OK

  6. CHECK FOR SPARKS AND IGNITION

    1. Perform a spark test.

      Click here

      Tip:

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

      Result

      Result

      NEXT
    NEXT

  7. CHECK CYLINDER COMPRESSION PRESSURE

    1. Measure the cylinder compression pressure of the misfiring cylinder.

      Click here

      Result

      Result

      OK

      NG
    NG

    CHECK ENGINE TO DETERMINE CAUSE OF LOW COMPRESSION

    OK

  8. CHECK FUEL INJECTOR ASSEMBLY (POWER SOURCE)

    1. A166988C01

      *a

      Front view of wire harness connector

      (to Fuel Injector Assembly)

      Disconnect the fuel injector connector.

    2. Turn the engine switch on (IG).

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

      Standard Voltage

      Cylinder

      Tester Connection

      Switch Condition

      Specified Condition

      No. 1

      E1-2 - Ground

      Engine switch on (IG)

      11 to 14 V

      No. 2

      n1-2 - Ground

      Engine switch on (IG)

      11 to 14 V

      No. 3

      E2-2 - Ground

      Engine switch on (IG)

      11 to 14 V

      No. 4

      n2-2 - Ground

      Engine switch on (IG)

      11 to 14 V

      No. 5

      E3-2 - Ground

      Engine switch on (IG)

      11 to 14 V

      No. 6

      n3-2 - Ground

      Engine switch on (IG)

      11 to 14 V

      No. 7

      E4-2 - Ground

      Engine switch on (IG)

      11 to 14 V

      No. 8

      n4-2 - Ground

      Engine switch on (IG)

      11 to 14 V

      Result

      Result

      OK

      NG
    NG

    GO TO FUEL INJECTOR CIRCUIT

    Click here

    OK

  9. CHECK HARNESS AND CONNECTOR

    1. Disconnect the fuel injector connector.

    2. Disconnect the ECM connector.

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

      Standard Resistance

      Cylinder

      Tester Connection

      Condition

      Specified Condition

      No. 1

      E1-1 - Body ground

      Always

      10 kΩ or higher

      E1-1 - C31-6 (#10)

      Always

      Below 1 Ω

      No. 2

      n1-1 - Ground

      Always

      10 kΩ or higher

      n1-1 - C31-1 (#20)

      Always

      Below 1 Ω

      No. 3

      E2-1 - Ground

      Always

      10 kΩ or higher

      E2-1 - C31-7 (#30)

      Always

      Below 1 Ω

      No. 4

      n2-1 - Ground

      Always

      10 kΩ or higher

      n2-1 - C31-2 (#40)

      Always

      Below 1 Ω

      No. 5

      E3-1 - Ground

      Always

      10 kΩ or higher

      E3-1 - C31-8 (#50)

      Always

      Below 1 Ω

      No. 6

      n3-1 - Ground

      Always

      10 kΩ or higher

      n3-1 - C31-3 (#60)

      Always

      Below 1 Ω

      No. 7

      E4-1 - Ground

      Always

      10 kΩ or higher

      E4-1 - C31-9 (#70)

      Always

      Below 1 Ω

      No. 8

      n4-1 - Ground

      Always

      10 kΩ or higher

      n4-1 - C31-4 (#80)

      Always

      Below 1 Ω

      Result

      Result

      OK

      NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  10. CHECK FUEL INJECTOR ASSEMBLY OF MISFIRING CYLINDER

    1. Check the fuel injector injection [whether fuel volume is high or low, and whether injection pattern is poor].

      Click here

      Result

      Result

      OK

      NG
    NG

    REPLACE FUEL INJECTOR ASSEMBLY

    Click here

    OK

  11. CHECK AIR INDUCTION SYSTEM

    1. Check the air induction system for vacuum leakage.

      Click here

      OK

      No leakage in air induction system.

      Result

      Result

      OK

      NG
    NG

    REPAIR OR REPLACE AIR INDUCTION SYSTEM

    Click hereClick here

    OK

  12. CHECK FUEL PRESSURE

    1. Check the fuel pressure.

      Click here

      Result

      Result

      OK

      NG
    NG

    CHECK FUEL LINEClick here

    OK

  13. READ VALUE USING INTELLIGENT TESTER (COOLANT TEMP)

    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 and ECT / Data List / All Data / Coolant Temp.

      Powertrain > Engine and ECT > Data List

      Tester Display

      Coolant Temp

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

      Standard

      With cold engine: Same as ambient air temperature.

      With warm engine: Between 75°C and 100°C (167°F and 212°F).

      Result

      Result

      OK

      NG
    NG

    REPLACE ENGINE COOLANT TEMPERATURE SENSOR

    Click here

    OK

  14. READ VALUE USING INTELLIGENT TESTER (MAF)

    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 and ECT / Data List / All Data / MAF and Coolant Temp.

      Powertrain > Engine and ECT > Data List

      Tester Display

      MAF

      Coolant Temp

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

    6. Read MAF with the engine speed at 3000 rpm.

      Standard

      Between 18.3 g/sec. and 25.8 g/sec. (shift lever: N; A/C: Off).

      Result

      Result

      OK

      NG
    NG

    CHECK HARNESS AND CONNECTORClick here

    OK

  15. CHECK VALVE TIMING

    A214700E04

    1. Remove the cylinder head cover LH and RH.

    2. Turn the crankshaft pulley and align its groove with the "0" alignment mark of the timing chain cover.

    3. Check that the alignment marks of the camshaft timing gears and camshaft timing exhaust gears are at the positions shown in the illustration.

      Tip:

      If the alignment marks are not as shown, turn the crankshaft one revolution clockwise.

      OK

      Alignment marks on camshaft timing gears are aligned as shown in the illustration.

      Result

      Result

      OK

      NG
    NG

    ADJUST VALVE TIMING

    Click hereClick here

    OK

  16. PERFORM ACTIVE TEST USING INTELLIGENT TESTER (CONTROL THE EGR STEP POSITION)

    1. Connect the intelligent tester to the DLC3.

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

      Tip:

      • When performing the Active Test, make sure the shift lever is in P or N.

      • The A/C switch and all accessory switches should be off.

    3. Turn the tester on.

    4. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the EGR Step Position.

      Powertrain > Engine and ECT > Active Test

      Tester Display

      Control the EGR Step Position

    5. Confirm that Throttle Idle Position is ON and check the engine idling condition and the value of MAP in the Data List while performing the Active Test.

      Tip:

      • 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.

      OK

      MAP and idling condition change in response to EGR step position as follows.

      Standard

      -

      EGR Step Position (Active Test)

      Step 0

      Step 0 to 30

      Idling condition

      Steady idling

      Idling changes from steady to rough idling or engine stalls

      MAP

      (Data List)

      20 to 40 kPa (150 to 300 mmHg)

      MAP value is at least 10 kPa (75 mmHg) higher than when EGR valve is fully closed

      Result

      Result

      OK

      NG
    OK

    CHECK HARNESS AND CONNECTORClick here

    NG

  17. INSPECT EGR VALVE ASSEMBLY

    1. Remove the EGR valve assembly.

      Click here

    2. Check if the EGR valve is stuck open.

      OK

      EGR valve is tightly closed.

      Result

      Result

      OK

      NG
    OK

    CHECK HARNESS AND CONNECTORClick here

    NG

    REPLACE EGR VALVE ASSEMBLY

    Click here

  18. CHECK AIR INDUCTION SYSTEM

    1. Check the air induction system for vacuum leakage.

      Click here

      OK

      No leakage in air induction system.

      Result

      Result

      OK

      NG
    NG

    REPAIR OR REPLACE AIR INDUCTION SYSTEM

    Click hereClick here

    OK

  19. CHECK FUEL PRESSURE

    1. Check the fuel pressure.

      Click here

      Result

      Result

      OK

      NG
    NG

    CHECK FUEL LINEClick here

    OK

  20. READ VALUE USING INTELLIGENT TESTER (COOLANT TEMP)

    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 and ECT / Data List / All Data / Coolant Temp.

      Powertrain > Engine and ECT > Data List

      Tester Display

      Coolant Temp

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

      Standard

      With cold engine: Same as ambient air temperature.

      With warm engine: Between 75°C and 100°C (167°F and 212°F).

      Result

      Result

      OK

      NG
    NG

    REPLACE ENGINE COOLANT TEMPERATURE SENSOR

    Click here

    OK

  21. READ VALUE USING INTELLIGENT TESTER (MAF)

    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 and ECT / Data List / All Data / MAF and Coolant Temp.

      Powertrain > Engine and ECT > Data List

      Tester Display

      MAF

      Coolant Temp

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

    6. Read MAF with the engine speed at 3000 rpm.

      Standard

      Between 18.3 g/sec. and 25.8 g/sec. (shift lever: N; A/C: Off).

      Result

      Result

      OK

      NG
    NG

    CHECK HARNESS AND CONNECTORClick here

    OK

  22. CHECK VALVE TIMING

    A214700E04

    1. Remove the cylinder head cover LH and RH.

    2. Turn the crankshaft pulley and align its groove with the "0" alignment mark of the timing chain cover.

    3. Check that the alignment marks of the camshaft timing gears and camshaft timing exhaust gears are at the positions shown in the illustration.

      Tip:

      If the alignment marks are not as shown, turn the crankshaft one revolution clockwise.

      OK

      Alignment marks on camshaft timing gears are aligned as shown in the illustration.

      Result

      Result

      OK

      NG
    NG

    ADJUST VALVE TIMING

    Click hereClick here

    OK

  23. PERFORM ACTIVE TEST USING INTELLIGENT TESTER (CONTROL THE EGR STEP POSITION)

    1. Connect the intelligent tester to the DLC3.

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

      Tip:

      • When performing the Active Test, make sure the shift lever is in P or N.

      • The A/C switch and all accessory switches should be off.

    3. Turn the tester on.

    4. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the EGR Step Position.

      Powertrain > Engine and ECT > Active Test

      Tester Display

      Control the EGR Step Position

    5. Confirm that Throttle Idle Position is ON and check the engine idling condition and the value of MAP in the Data List while performing the Active Test.

      Tip:

      • 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.

      OK

      MAP and idling condition change in response to EGR step position as follows.

      Standard

      -

      EGR Step Position (Active Test)

      Step 0

      Step 0 to 30

      Idling condition

      Steady idling

      Idling changes from steady to rough idling or engine stalls

      MAP

      (Data List)

      20 to 40 kPa (150 to 300 mmHg)

      MAP value is at least 10 kPa (75 mmHg) higher than when EGR valve is fully closed

      Result

      Result

      OK

      NG
    OK

    INSPECT SPARK PLUGClick here

    NG

  24. INSPECT EGR VALVE ASSEMBLY

    1. Remove the EGR valve assembly.

      Click here

    2. Check if the EGR valve is stuck open.

      OK

      EGR valve is tightly closed.

      Result

      Result

      OK

      NG
    NG

    REPLACE EGR VALVE ASSEMBLY

    Click here

    OK

  25. INSPECT SPARK PLUG

    1. Inspect the spark plug of the misfiring cylinder.

      Click here

      Result

      Result

      OK

      NG
    NG

    REPLACE SPARK PLUG

    Click here

    OK

  26. CHECK FOR SPARKS AND IGNITION

    1. Perform a spark test.

      Click here

      Tip:

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

      Result

      Result

      NEXT
    NEXT

  27. CHECK CYLINDER COMPRESSION PRESSURE

    1. Measure the cylinder compression pressure of the misfiring cylinder.

      Click here

      Result

      Result

      OK

      NG
    NG

    CHECK ENGINE TO DETERMINE CAUSE OF LOW COMPRESSION

    OK

  28. CHECK FUEL INJECTOR ASSEMBLY (POWER SOURCE)

    1. A166988C01

      *a

      Front view of wire harness connector

      (to Fuel Injector Assembly)

      Disconnect the fuel injector connector.

    2. Turn the engine switch on (IG).

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

      Standard Voltage

      Cylinder

      Tester Connection

      Switch Condition

      Specified Condition

      No. 1

      E1-2 - Ground

      Engine switch on (IG)

      11 to 14 V

      No. 2

      n1-2 - Ground

      Engine switch on (IG)

      11 to 14 V

      No. 3

      E2-2 - Ground

      Engine switch on (IG)

      11 to 14 V

      No. 4

      n2-2 - Ground

      Engine switch on (IG)

      11 to 14 V

      No. 5

      E3-2 - Ground

      Engine switch on (IG)

      11 to 14 V

      No. 6

      n3-2 - Ground

      Engine switch on (IG)

      11 to 14 V

      No. 7

      E4-2 - Ground

      Engine switch on (IG)

      11 to 14 V

      No. 8

      n4-2 - Ground

      Engine switch on (IG)

      11 to 14 V

      Result

      Result

      OK

      NG
    NG

    GO TO FUEL INJECTOR CIRCUIT

    Click here

    OK

  29. CHECK HARNESS AND CONNECTOR (FUEL INJECTOR - ECM)

    1. Disconnect the fuel injector connector.

    2. Disconnect the ECM connector.

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

      Standard Resistance

      Cylinder

      Tester Connection

      Condition

      Specified Condition

      No. 1

      E1-1 - Body ground

      Always

      10 kΩ or higher

      E1-1 - C31-6 (#10)

      Always

      Below 1 Ω

      No. 2

      n1-1 - Ground

      Always

      10 kΩ or higher

      n1-1 - C31-1 (#20)

      Always

      Below 1 Ω

      No. 3

      E2-1 - Ground

      Always

      10 kΩ or higher

      E2-1 - C31-7 (#30)

      Always

      Below 1 Ω

      No. 4

      n2-1 - Ground

      Always

      10 kΩ or higher

      n2-1 - C31-2 (#40)

      Always

      Below 1 Ω

      No. 5

      E3-1 - Ground

      Always

      10 kΩ or higher

      E3-1 - C31-8 (#50)

      Always

      Below 1 Ω

      No. 6

      n3-1 - Ground

      Always

      10 kΩ or higher

      n3-1 - C31-3 (#60)

      Always

      Below 1 Ω

      No. 7

      E4-1 - Ground

      Always

      10 kΩ or higher

      E4-1 - C31-9 (#70)

      Always

      Below 1 Ω

      No. 8

      n4-1 - Ground

      Always

      10 kΩ or higher

      n4-1 - C31-4 (#80)

      Always

      Below 1 Ω

      Result

      Result

      OK

      NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  30. CHECK FUEL INJECTOR ASSEMBLY OF MISFIRING CYLINDER

    1. Check the fuel injector injection [whether fuel volume is high or low, and whether injection pattern is poor].

      Click here

      Result

      Result

      OK

      NG
    NG

    REPLACE FUEL INJECTOR ASSEMBLY

    Click here

    OK

  31. CHECK HARNESS AND CONNECTOR

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

      Click here

      Tip:

      Repair any problems.

      Result

      Result

      NEXT
    NEXT

  32. CHECK WHETHER DTC OUTPUT RECURS

    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the tester on.

    4. Clear the DTCs.

      Click here

      Powertrain > Engine and ECT > Clear DTCs

    5. Turn the engine switch off.

    6. Turn the engine switch on (IG) and turn the tester on.

    7. Start the engine and warm it up.

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

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

      Powertrain > Engine and ECT > Utility

      Tester Display

      All Readiness

    10. Input the DTC: P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307 or P0308.

      Powertrain > Engine and ECT > Trouble Codes

    11. Check the DTC judgment result.

      Result

      Display (DTC Output)

      Proceed to

      ABNORMAL

      (P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307 or P0308 output)

      A

      NORMAL

      (No DTC output)

      B
    B

    END

    A

  33. CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER - ECM)

    1. Disconnect the mass air flow meter connector.

    2. Disconnect the ECM connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      C27-3 (VG) - C29-14 (VG)

      Always

      Below 1 Ω

      C27-2 (E2G) - C29-13 (E2G)

      Always

      Below 1 Ω

      C27-3 (VG) or C29-14 (VG) - Body ground

      Always

      10 kΩ or higher

      Result

      Result

      OK

      NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  34. REPLACE MASS AIR FLOW METER ASSEMBLY

    1. Replace the mass air flow meter assembly.

      Click here

      Tip:

      If the results of the inspections performed in steps 14 and 21 indicated no problem, proceed to the next step without replacing the mass air flow meter assembly.

      Result

      Result

      NEXT
    NEXT

  35. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the tester on.

    4. Clear the DTCs.

      Click here

      Powertrain > Engine and ECT > Clear DTCs

    5. Turn the engine switch off.

    6. Turn the engine switch on (IG) and turn the tester on.

    7. Start the engine and warm it up.

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

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

      Powertrain > Engine and ECT > Utility

      Tester Display

      All Readiness

    10. Input the DTC: P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307 or P0308.

    11. Check the DTC judgment result.

      Result

      Display (DTC Output)

      Result

      NORMAL

      (No DTC output)

      A

      ABNORMAL

      (P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307 or P0308 output)

      B
    A

    END

    B

    REPLACE ECM

    Click here

  36. CHECK FUEL LINE

    1. Check the fuel lines for leaks or blockage.

      Result

      Result

      OK

      NG
    OK

    REPLACE FUEL PUMP

    Click here

    NG

    REPAIR OR REPLACE FUEL LINE