ECD SYSTEM(w/o EGR System) Lack of Power or Hesitation

DESCRIPTION

Malfunction Condition Main Trouble Area Related Trouble Area

  • Lack of power caused by abnormal fuel injection volume (fuel supply pump assembly malfunction, injector assembly malfunction, etc.)

  • Lack of power caused by intake air volume shortage (turbocharger malfunction)

(a) Injector assembly malfunctions


  • Injector sliding malfunction

  • Injector stuck closed

  • Injector stuck open

  • Deposits in injector

  • Injector circuit malfunction

(b) Abnormal common rail pressure


  • Pre-stroke control valve

(c) Abnormal intake air volume


  • Intake system leakage or clogged

  • Turbocharger sub-assembly

  • Throttle valve does not open

  • Pressure discharge valve (P1271 stored simultaneously)

  • Intake air system blockage

  • Fuel filter element assembly is clogged

  • Throttle valve

  • Mass air flow meter sub-assembly

  • Compression pressure

  • Injector compensation code

  • Fuel leak

  • Glow plug

  • Fuel pressure sensor

  • Manifold absolute pressure sensor

  • Vacuum hose connection for manifold absolute pressure sensor

  • Vehicle modifications

  • Clutch disc wear

  • Low quality fuel

  • Frozen fuel

  • ECM

Tech Tips


  • Specified values in the following troubleshooting flowchart are for reference only. Variations in the Data List values may occur depending on the measuring conditions or the vehicle's age. Do not judge the vehicle to be normal even when the Data List values indicate a standard level. There are possibly some concealed factors causing the malfunction.

  • Check that the vehicle has not been modified in any way prior to the vehicle inspection.

  • This troubleshooting procedure checks for the cause of an obvious lack of engine power while the vehicle is being driven (such as the maximum speed being extremely low).


  1. Faults and Symptoms of Common Rail Diesel Components


    1. Engine Control

      Mass Air Flow Meter Sub-assembly
      Main fault Decrease in performance (foreign matter is stuck)
      Symptoms Lack of power, black smoke
      Data List MAF

      Tech Tips

      The maximum fuel injection volume is controlled according to the output from the mass air flow meter sub-assembly.
      Intake System
      Symptom and Corresponding Main Fault

      • Lack of power (no black smoke) due to air cleaner filter element blockage or crushed or leaking air duct

      • Black smoke (no lack of power) due to leakage between the turbo and intake manifold
      Data List

      • MAP

      • Target Booster Pressure

        When the accelerator is fully depressed, if MAP is 20 kPa lower than Target Booster Pressure for more than 5 seconds, then a lack of power will be felt.

      • MAF
      Turbocharger System
      Main fault

      • Air leak in the turbocharged air passage

      • Turbocharger sub-assembly (turbine, bearing, variable nozzle)
      Symptoms

      Lack of power (when vehicle is starting, under heavy load)

      (Black smoke is not emitted when racing while vehicle is stopped)
      Data List

      MAP, Target Booster Pressure


      • When the accelerator is fully depressed, if MAP is 20 kPa lower than Target Booster Pressure for more than 5 seconds, then a lack of power will be felt.

      • With the ignition switch ON or during idling, MAP = atmospheric pressure (standard atmospheric pressure = 101 kPa). When the engine speed is about 1500 rpm or more, the turbocharger starts to take effect and MAP becomes higher than atmospheric pressure.

      • Atmospheric pressure decreases by 1 kPa each time elevation increases by 100 m, and is also affected by the current weather conditions.
      Exhaust System
      Main fault Blockage
      Symptoms Lack of power (high engine speed, under heavy load)
      Data List

      MAP, Target Booster Pressure

      When the accelerator is fully depressed, if MAP is 20 kPa lower than Target Booster Pressure for more than 5 seconds, then a lack of power will be felt.
      Glow System
      Main fault Glow system malfunction
      Symptoms Difficult to start, rough idle, knocking, white smoke (when cold)
      Diagnostic Point

      • Measure the resistance of the glow plug

      • Check the glow plug indicator light
      Engine - 1
      Main fault Damaged, seized up
      Symptoms Cannot crank, crank speed is low, strange noise
      Engine - 2
      Main fault Loss of compression
      Symptoms Rough idle (lack of power always)
      Data List

      Engine Speed of Cyl#1 to #4


      • When cranking during the "Check the Cylinder Compression" Active Test, if there is a high speed cylinder, approx. 100 rpm more than the other cylinders, that cylinder may lose compression.

      Injection Feedback Val


      • When an Injector Feedback Val is more than 3 mm3/st, there may be a malfunction in the corresponding cylinder.

    2. Diesel Injection

      Fuel Supply Pump Assembly
      Main fault -
      Symptoms Difficult to start, engine stalling, rough idle, lack of power
      Data List

      Common Rail Pressure, Target Common Rail Pressure


      • Common Rail Pressure is within 5000 kPa of Target Common Rail Pressure during idling with the engine warmed up (engine coolant temperature is higher than 75°C (167°F)).

      • If the fuel pressure is 20000 kPa below the target pressure, then a lack of power will be felt.

      • If the fuel pressure is below 25000 kPa, then idling will be rough.

      Tech Tips

      The fuel pressure changes at engine start, but is approx. 25000 kPa at engine start after the engine is warmed up.
      Diagnostic Trouble Code Even if Common Rail Pressure is below Target Common Rail Pressure, a DTC will not be stored.
      Fuel Filter Element Assembly
      Main fault Blockage
      Symptoms Difficult to start, engine stalling, rough idle, lack of power
      Data List

      Common Rail Pressure, Target Common Rail Pressure


      • Common Rail Pressure is within 5000 kPa of Target Common Rail Pressure during idling with the engine warmed up (engine coolant temperature is higher than 75°C (167°F)).

      • If the fuel pressure is 20000 kPa below the target pressure, then a lack of power will be felt.

      • If the fuel pressure is below 25000 kPa, then idling will be rough.

      Tech Tips

      The fuel pressure changes at engine start, but is approx. 25000 kPa at engine start after the engine is warmed up.
      Diagnostic Trouble Code Even if Common Rail Pressure is below Target Common Rail Pressure, a DTC will not be stored.
      Injector Assembly
      Main fault Blockage
      Symptoms Rough idle, lack of power, black smoke, white smoke, knocking
      Data List

      Injection Feedback Val


      • When an Injector Feedback Val is more than 3 mm3/st, there may be a malfunction in the corresponding cylinder. This value can be read after idling for 1 minute.
      Fuel Pressure Sensor
      Main fault Open circuit, decrease in performance (foreign matter is stuck)
      Symptoms Difficult to start, rough idle, engine stall, lack of power
      Data List

      Common Rail Pressure, Target Common Rail Pressure


      • Common Rail Pressure is within 5000 kPa of Target Common Rail Pressure during idling with the engine warmed up (engine coolant temperature is higher than 75°C (167°F)).
      Diagnostic Trouble Code When the fuel pressure sensor has a fault, some DTCs may be stored.
      Irregular Fuel
      Main fault -
      Symptoms Difficult to start, rough idle (especially when cold)

    3. Diesel Throttle

      Diesel Throttle System
      Main fault Stuck, does not move smoothly
      Symptoms

      • Stuck closed: Lack of power, difficult to start, rough idle, engine stall, black smoke. These may occur when stuck almost fully closed.

      • Stuck open: Turbocharger sound increases. When the engine is stopped, engine vibrations may occur.
      Data List

      Actual Throttle Position


      • 0%: Fully closed

      • 100%: Fully open

      • When the ignition switch ON (engine stopped), the diesel throttle is fully open. When idling, the diesel throttle is at the halfway point. When the ignition switch is turned from ON to off, the throttle is fully closed temporarily.

  2. Data List Related to Lack of Power


    • Engine Speed

    • MAP

    • MAF

    • Intake Air

    • Coolant Temp

    • Target Common Rail Pressure

    • Common Rail Pressure

    • Injection Feedback Val #1 to #4

    • Injection Volume

    • Actual Throttle Position

CAUTION / NOTICE / HINT


  1. Explanation of Symptom

    Lack of Power

    The power of the diesel engine is determined by the quantity of injected fuel and the quantity of intake air.

    The quantity of injected fuel is determined by the fuel pressure and the amount of time the injector assembly is open. Basically, the fuel pressure is controlled so that it reaches the target fuel pressure. The throttle valve does not restrict air flow volume, so the manifold absolute pressure is almost the same as atmospheric pressure when idling. At more than approximately 1500 rpm, the turbo starts to operate causing the manifold absolute pressure to become higher than atmospheric pressure.

    The manifold absolute pressure is controlled so that it reaches the Target Booster Pressure when accelerating the vehicle at full throttle.

    Note

    After replacing an injector assembly, the ECM needs registration Click here.

PROCEDURE


  1. READ OUTPUT DTCS (RELATING TO ENGINE)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON and turn the GTS on.

    3. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

    4. Read the pending DTCs.


      Powertrain > Engine and ECT > Trouble Codes
      Result
      Result Proceed to
      No DTC is output A
      Engine related DTCs are output B

      Tech Tips

      If only DTC P1608 is output, proceed to step 2.


    B

    GO TO DTC CHART Click here

    A

  2. TAKE SNAPSHOT DURING IDLING AND 4000 RPM (PROCEDURE 2)


    1. Connect the GTS to the DLC3.

    2. Start the engine and turn the GTS on.

    3. Enter the following menus: Powertrain / Engine and ECT / Data List / Diesel Lack of Power.

    4. With no load after the engine is warmed up, take a snapshot when idling and at 4000 rpm.

      Tech Tips


      • A snapshot can be used to compare vehicle data from the time of the malfunction to normal data and is very useful for troubleshooting.

      • The shift lever should be in neutral and the A/C switch and all accessory switches should be off.

      Result
      Proceed to
      NEXT

    NEXT

  3. TAKE SNAPSHOT DURING LACK OF POWER (PROCEDURE 3)


    1. Enter the following menus: Powertrain / Engine and ECT / Data List / Diesel Lack of Power.

    2. Check for a lack of power during the driving test.

      Tech Tips


      • A snapshot can be used to compare vehicle data from the time of the malfunction to normal data and is very useful for troubleshooting.

      • Move the shift lever to 2nd gear and accelerate the vehicle with the accelerator pedal fully depressed. Then, check the Data List with the engine warmed up and idling (the shift lever should be in neutral and the A/C switch and all accessory switches should be off).

      Note

      Obey all laws and regulations, and pay attention to traffic conditions while driving the vehicle.

      Result
      Result Proceed to
      Apparent lack of power is present A
      Apparent lack of power is not present B

    B

    COMPARE WITH SIMILAR VEHICLE WITH SAME ENGINE Click here

    A

  4. CHECK SNAPSHOT (MAP AND MAF)


    1. Check MAP and MAF in the snapshot taken in procedure 2 when the engine was running at 4000 rpm with no load.

      Result
      Result Proceed to
      MAF 84 gm/sec or more and MAP 105 kPa or higher*1 A
      MAP is below 90 kPa*2 B
      Except above C

      Tech Tips

      The above values were measured under standard atmospheric pressure. The values are influenced by elevation, weather conditions, etc.

      Standard atmospheric pressure is 101 kPa. For every 100 m increase in elevation, pressure drops by 1 kPa. This varies by weather.

      *1: There may be a problem in the fuel injection system or intake system.

      *2: There may be a problem in the turbocharger system.


    B

    READ VALUE USING GTS (MAP AND ATMOSPHERIC PRESSURE) Click here

    C

    CHECK INTAKE SYSTEM Click here

    A

  5. CHECK SNAPSHOT (MAP, COMMON RAIL PRESSURE AND TARGET COMMON RAIL PRESSURE)


    1. Check MAP, Common Rail Pressure and Target Common Rail Pressure in the snapshot taken in procedure 3 when the vehicle was accelerating with the accelerator pedal fully depressed in 2nd gear.

      Result
      Result Proceed to
      MAP is below 170 kPa at an engine speed of 3000 rpm A
      Difference between Common Rail Pressure and Target Common Rail Pressure is 20000 kPa or more B
      Except above C

      Tech Tips


      • The above values were measured under standard atmospheric pressure. The values are influenced by elevation, weather conditions, etc. Standard atmospheric pressure is 101 kPa. For every 100 m increase in elevation, pressure drops by 1 kPa. This varies by weather.

      • The engine speed must be 1500 rpm or less before performing the inspection in which the accelerator pedal is fully depressed and the engine is accelerated to a speed of 3000 rpm.

      • If the turbocharger movement is not smooth, etc., the value of MAP in the snapshot taken during lack of power will not reach the target value. When the accelerator pedal is fully depressed and the engine speed is 3000 rpm, the MAP should be higher than 190 kPa.


    B

    INSPECT CLOGGED FUEL PIPE Click here

    C

    GO TO STEP 26 Click here

    A

  6. CHECK INTAKE SYSTEM


    1. Check for air leaks and blockages between the air cleaner case and turbocharger sub-assembly, and between the turbocharger sub-assembly and intake manifold.

      Tech Tips


      • Inspect the intake system, especially hoses and pipes between the air cleaner filter element sub-assembly and turbocharger sub-assembly.

      • Check for abnormal disconnections, pipe and hose squashing, and any damage in the intake system.

      • Using your hand, check whether the pipes and hoses in the intake system are securely connected.

      • By applying soapy water and revving up the engine, air leaks from the intake system can be checked by checking for bubbles.

      • Check for any modifications in the intake system made by the user.

      OK
      No leakage or blockage.
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE INTAKE SYSTEM Click here

    OK

  7. CLEAN FUEL FILTER CASE AND REPLACE FUEL FILTER ELEMENT ASSEMBLY


    1. Clean the fuel filter case and replace the fuel filter element assembly.

      Tech Tips

      Be sure to clean the inside of the fuel filter case as the injector assemblies may not operate properly if the fuel filter element assembly is installed with foreign matter remaining inside the fuel filter case.

      Result
      Proceed to
      NEXT

    NEXT

  8. REPLACE INJECTOR ASSEMBLIES OF ALL CYLINDERS


    1. Replace the injector assemblies.

      Click here

      Note


      • When replacing the injector assembly for a cylinder, always be sure to use a new No. 1 injection pipe sub-assembly and a new No. 2 injection pipe sub-assembly.

      • Follow the procedure in the repair manual and temporarily install the No. 1 injection pipe sub-assembly, No. 2 injection pipe sub-assembly and No. 1 nozzle leakage pipe assembly, and then correctly position the injector assemblies. After that, tighten parts according to the torque specifications.

      • If the installation procedure is not performed correctly, injector assemblies may become out of position, which may cause the injector assemblies to deteriorate, resulting in malfunctions.

      • If an injector assembly deteriorates and malfunctions, other problems such as knocking, rough idle, etc. may occur.

      • If an injector assembly becomes out of position, it is possible that the seal between the injector assembly and injection pipe sub-assembly may become incomplete, resulting in a fuel leak.

      Result
      Proceed to
      NEXT

    NEXT

  9. BLEED AIR FROM FUEL SYSTEM


    1. Bleed the air from the fuel system.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  10. REGISTER INJECTOR COMPENSATION CODE AND PERFORM PILOT QUANTITY LEARNING


    1. Register the injector compensation code.

      Click here


      Powertrain > Engine and ECT > Utility
      Tester Display
      Injector Compensation

    2. Perform the injector pilot quantity learning.

      Click here


      Powertrain > Engine and ECT > Utility
      Tester Display
      Pilot Quantity Learning
      Result
      Proceed to
      NEXT

    NEXT

  11. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

    Result
    Proceed to
    NEXT

    NEXT

    END

  12. COMPARE WITH SIMILAR VEHICLE WITH SAME ENGINE


    1. Confirm the situation in which the lack of power was experienced by the customer again, and compare the driving feeling under the same conditions using a similar vehicle with the same engine while collecting data with the GTS.

      Tech Tips

      Confirm the state of the following conditions when the lack of power was experienced.


      • Accelerator pedal position (vehicle load)

      • Vehicle speed

      • Engine coolant temperature

      • Ambient temperature

      • Driving conditions before the lack of power occurred

      • Climate

      • Road and traffic conditions

      • When (what day) the problem was noticed

      • Whether the problem occurs suddenly or gradually

      • How often the problem occurs

      • Why the customer felt there is a lack of power (e.g. the customer compared their vehicle with another vehicle, somebody told the customer that their vehicle has a lack of power, etc.)

      • Level of lack of power (slight or drastic)

      Result
      Result Proceed to
      Significant difference is found A
      Significant difference is not found B

    A

    GO TO STEP 4 Click here

    B

    EXPLAIN THE INVESTIGATION RESULT TO CUSTOMER Click here

  13. READ VALUE USING GTS (MAP AND ATMOSPHERIC PRESSURE)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON and turn the GTS on.

    3. Enter the following menus: Powertrain / Engine and ECT / Data List / MAP and Atmosphere Pressure.


      Powertrain > Engine and ECT > Data List
      Tester Display
      Atmosphere Pressure
      MAP

    4. Compare MAP to Atmosphere Pressure when the ignition switch ON (do not start the engine).

      Standard
      Difference between MAP and Atmosphere Pressure is less than 8 kPa.

      Tech Tips


      • If MAP and Atmosphere Pressure have the same value, both are normal. If there is a difference of 8 kPa or more, compare the values to the atmospheric pressure for that day. The sensor whose deviation is the greatest is malfunctioning.

      • Standard atmospheric pressure is 101 kPa. For every 100 m increase in elevation, pressure drops by 1 kPa. This varies by weather.

      Result
      Result Proceed to
      MAP and Atmosphere Pressure have same value A
      MAP is different from actual atmospheric pressure B
      Atmosphere Pressure is different from actual atmospheric pressure C

    B

    REPLACE MANIFOLD ABSOLUTE PRESSURE SENSOR Click here

    C

    REPLACE ECM Click here

    A

  14. CHECK INTAKE SYSTEM


    1. Check for air leaks and blockages between the air cleaner cap and turbocharger sub-assembly, and between the turbocharger sub-assembly and intake manifold.

      Result
      Result Proceed to
      Leaks and/or blockages exist in the intake system A
      No leaks or blockages in the intake system B

      Tech Tips


      • Inspect the intake system, especially hoses and pipes between the air cleaner filter element sub-assembly and turbocharger sub-assembly.

      • Check for abnormal disconnections, pipe and hose squashing, and any damage in the intake system.

      • Using your hand, check whether the pipes and hoses in the intake system are securely connected.

      • When inspecting for a clogged intake system (cause of low MAP), check the following points:


        • - Clogged air cleaner filter element

        • - Clogged intake hose

        • - Diesel throttle valve stuck in closed position

      • Check for any modifications in the intake system made by the user.


    B

    CHECK LACK OF POWER (TURBOCHARGER SYSTEM) Click here

    A

  15. REPAIR OR REPLACE INTAKE SYSTEM


    1. Repair or replace the malfunctioning part in the intake system.

      Result
      Proceed to
      NEXT

    NEXT

    GO TO STEP 18 Click here

  16. EXPLAIN THE INVESTIGATION RESULT TO CUSTOMER


    1. Vehicle performance is normal. There is no problem at this point in time. However, if the problem reoccurs, ask the customer to explain in detail the situation in which the problem occurred. The best course may be to have the customer ride in another vehicle with the same specifications to understand that there is no problem with the customer's vehicle.

      Result
      Proceed to
      NEXT

    NEXT

    END

  17. CHECK LACK OF POWER (TURBOCHARGER SYSTEM)


    1. Check the lack of power (turbocharger system).

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  18. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

    Result
    Proceed to
    NEXT

    NEXT

    END

  19. INSPECT CLOGGED FUEL PIPE


    1. Connect the GTS to the DLC3.

    2. Start the engine and turn the GTS on.

    3. Enter the following menus: Powertrain / Engine and ECT / Data List / Target Common Rail Pressure and Common Rail Pressure.


      Powertrain > Engine and ECT > Data List
      Tester Display
      Target Common Rail Pressure
      Common Rail Pressure

    4. With no load after the engine is warmed up, take a snapshot when idling and vehicle was accelerating with the accelerator pedal fully depressed in 2nd gear.

    5. Check the Target Common Rail Pressure and Common Rail Pressure value.

      B003S64E04
      Result
      Result Proceed to
      While idling the vehicle, "Common Rail Pressure" deviates from the normal range and varies periodically with a period of approximately 2 seconds or more*1 A
      "Common Rail Pressure" is normal while idling the vehicle, but "Common Rail Pressure" does not follow "Target Common Rail Pressure" when the accelerator pedal is fully depressed in 2nd gear*2
      Except above B

      Note


      • *1: The cause may be a squashed or blocked fuel pipe or hose.

      • *2: The cause may be a clogged fuel filterair element assembly.


    B

    REPLACE FUEL SUPPLY PUMP ASSEMBLY (PRE-STROKE CONTROL VALVE) Click here

    A

  20. REPAIR OR REPLACE CLOGGED FUEL LINE


    1. Repair or replace the clogged (including frozen fuel) fuel pipe.

    2. Replace the fuel filter element assembly.

      Tech Tips

      If "Common Rail Pressure" does not follow "Target Common Rail Pressure" when the accelerator pedal is fully depressed in 2nd gear, replace the fuel filter element assembly.

      Result
      Proceed to
      NEXT

    NEXT

  21. BLEED AIR FROM FUEL SYSTEM


    1. Bleed the air from the fuel system.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  22. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED


    1. Connect the GTS to the DLC3.

    2. Start the engine and turn the GTS on.

    3. Enter the following menus: Powertrain / Engine and ECT / Active Test / Test the Fuel Leak / Data List / Common Rail Pressure and Target Common Rail Pressure.


      Powertrain > Engine and ECT > Active Test
      Active Test Display
      Test the Fuel Leak
      Data List Display
      Target Common Rail Pressure
      Common Rail Pressure

    4. Take a snapshot with the GTS during the Active Test.

    5. Measure the difference between the target fuel pressure (Target Common Rail Pressure) and the actual fuel pressure (Common Rail Pressure) when the "Test the Fuel Leak" Active Test is performed.

      Tech Tips

      In order to obtain an exact measurement, perform the Active Test 5 times and measure the difference once each time the Active Test is performed.

      B003LE3E55
      OK
      The difference between the target fuel pressure and the actual fuel pressure 2 seconds after the Active Test starts is less than 10000 kPa.

      Tech Tips


      • "Target Common Rail Pressure" is the target fuel pressure controlled by the ECM.

      • "Common Rail Pressure" is the actual fuel pressure.

      Result
      Proceed to
      NEXT

    NEXT

    END

  23. REPLACE FUEL SUPPLY PUMP ASSEMBLY (PRE-STROKE CONTROL VALVE)


    1. Replace the fuel supply pump assembly.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

    GO TO STEP 21 Click here

  24. REPLACE MANIFOLD ABSOLUTE PRESSURE SENSOR


    1. Replace the manifold absolute pressure sensor.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

    GO TO STEP 18 Click here

  25. REPLACE ECM


    1. Replace the ECM.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

    GO TO STEP 18 Click here

  26. CHECK INTAKE SYSTEM


    1. Check for air leaks and blockages between the air cleaner cap and turbocharger sub-assembly, and between the turbocharger sub-assembly and intake manifold.

      Result
      Result Proceed to
      No leaks or blockages in the intake system A
      Leaks and/or blockages exist in the intake system B

      Tech Tips


      • Inspect the intake system, especially hoses and pipes between the air cleaner filter element sub-assembly and turbocharger sub-assembly.

      • Check for abnormal disconnections, pipe and hose squashing, and any damage in the intake system.

      • Using your hand, check whether the pipes and hoses in the intake system are securely connected.

      • By applying soapy water and revving up the engine, air leaks from the intake system can be checked by checking for bubbles.

      • Make sure that the hose between the manifold absolute pressure sensor and intake manifold is not loose or disconnected.

      • Check for any modifications in the intake system made by the user.


    B

    REPAIR OR REPLACE INTAKE SYSTEM Click here

    A

  27. READ VALUE USING GTS (MAF)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON and turn the GTS on.

    3. Enter the following menus: Powertrain / Engine and ECT / Data List / MAF.


      Powertrain > Engine and ECT > Data List
      Tester Display
      MAF

    4. Start the engine and read the value when 30 seconds has elapsed.

      Standard
      GTS Display Condition Specified Condition
      MAF Idling 10 to 21 gm/sec
      3000 rpm 72 to 94 gm/sec
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE MASS AIR FLOW METER SUB-ASSEMBLY Click here

    OK

  28. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

    Result
    Proceed to
    OK
    NG

    OK

    END

    NG

  29. CHECK TURBOCHARGER SUB-ASSEMBLY


    1. Check the lack of power (turbocharger system).

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  30. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

    Result
    Proceed to
    NEXT

    NEXT

    END

  31. REPLACE MASS AIR FLOW METER SUB-ASSEMBLY


    1. Replace the mass air flow meter sub-assembly.

      Click here

      Tech Tips


      • If foreign matter is stuck inside the mass air flow meter sub-assembly, the output characteristics of the mass air flow meter sub-assembly may change, resulting in a malfunction.

      • Before replacing the mass air flow meter sub-assembly, perform a wire harness inspection and if there are any problems with the wire harness, repair or replace it.

      Result
      Proceed to
      NEXT

    NEXT

    GO TO STEP 28 Click here

  32. REPAIR OR REPLACE INTAKE SYSTEM


    1. Repair or replace the malfunctioning part in the intake system.

      Result
      Proceed to
      NEXT

    NEXT

    GO TO STEP 28 Click here