Ecd System - Lack Of Power Or Hesitation

Lexus IS250 IS220d GSE20 ALE20 2AD-FHV ENGINE CONTROL SYSTEM

DESCRIPTION

INSPECTION PROCEDURE

CHECK HARNESS AND CONNECTOR (IN ENGINE COMPARTMENT)

PERFORM CONFIRMATION DRIVING PATTERN

READ DTC OUTPUT (RELATING TO ENGINE)

PERFORM ACTIVE TEST BY INTELLIGENT TESTER (TEST THE FUEL LEAK)

CHECK WHITE SMOKE

READ VALUE OF INTELLIGENT TESTER (MAP, MAF AND FUEL PRESSURE)

READ VALUE OF INTELLIGENT TESTER (INJECTION FEED BACK VAL AND INJECTION VOLUME)

CHECK INJECTOR COMPENSATION CODE

RESET ECM

BLEED FUEL LINE

CONFIRM CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

INSPECT GLOW PLUG ASSEMBLY

CHECK INTAKE SYSTEM

CHECK INJECTOR ASSEMBLY (IDENTIFY MALFUNCTIONING CYLINDER INJECTOR)

PERFORM ACTIVE TEST BY INTELLIGENT TESTER (INJECTOR CUT FOR IDENTIFYING MALFUNCTIONING CYLINDER)

PERFORM ACTIVE TEST BY INTELLIGENT TESTER (INJECTOR CUT FOR IDENTIFYING MALFUNCTIONING CYLINDER)

CHECK CYLINDER COMPRESSION PRESSURE

CHECK MALFUNCTIONING CYLINDER'S INJECTOR FOR DEPOSITS

CLEAN INJECTOR

READ VALUE OF INTELLIGENT TESTER (INJECTION FEEDBACK VAL AND INJECTION VOLUME)

CHECK INJECTORS FOR DEPOSITS (EXCEPT FUEL ADDITION INJECTOR)

CLEAN INJECTOR

READ VALUE OF INTELLIGENT TESTER (INJECTION FEEDBACK VAL AND INJECTION VOLUME)

CHECK EGR VALVE ASSEMBLY

INSPECT DIESEL THROTTLE BODY ASSEMBLY

CHECK INTAKE SYSTEM

CHECK TURBOCHARGER SUB-ASSEMBLY (MECHANICAL PROBLEM)

CHECK VACUUM HOSE (TURBOCHARGER - E-VRV, E-VRV - VACUUM PUMP)

CHECK E-VRV FOR TURBOCHARGER CONTROL

INSPECT TURBOCHARGER ACTUATOR

CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

REPLACE EXHAUST MANIFOLD CONVERTER SUB-ASSEMBLY

CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

CHECK AND REPLACE FUEL FILTER ASSEMBLY

CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

INSPECT COMMON RAIL ASSEMBLY (FUEL PRESSURE SENSOR)

INSPECT SUPPLY PUMP ASSEMBLY

ECD SYSTEM - Lack of Power or Hesitation

DESCRIPTION

Malfunction ConditionMain Trouble AreasRelated Trouble Areas
Lack of power caused by abnormal fuel injection volume (supply pump malfunction or injector malfunction)
Lack of power caused by intake air volume shortage (turbocharger malfunction, front exhaust pipe or exhaust manifold converter blocked)
Injector malfunctions
Injector sliding malfunction
Injector stuck closed
Injector stuck open
Deposits in injector
Injector circuit malfunction
Abnormal common rail pressure
Supply pump
Abnormal intake air volume
Turbocharger
Front exhaust pipe blockage
Exhaust manifold converter blockage
Pressure limiter
Intake air system leakage
Intake air system blockage
EGR system
Fuel filter element is clogged
Throttle valve
Compression pressure
Injector compensation code
Fuel leak
Glow plug
Fuel pressure sensor
EDU (P0200/97 set simultaneously)
Vehicle modifications
Low quality fuel
Frozen fuel
ECM
  • HINT:
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 of 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 (the vehicle speed does not reach the target speed in the high speed range) while the vehicle is being driven.

INSPECTION PROCEDURE

  • NOTICE:
After replacing the supply pump, the ECM needs initialization .
After replacing the injector, the ECM needs registration .
  • HINT:
Before troubleshooting, conduct the following:
Check the fuel quality.
Check the fuel for air.
Check the fuel system for blockages.
Check the air filter.
Check the engine oil.
Check the engine coolant.
Check the engine idling speed and the maximum engine speed.
Check the vacuum pump.
1.CHECK HARNESS AND CONNECTOR (IN ENGINE COMPARTMENT)

Check the wire harness and connector connections of common rail system components.

  • HINT:
  • Check the following components and system:
Sensors
Supply pump
Common rail
Injectors
EDU
Turbocharger system
Intake and exhaust system
  • OK:
  • The wire harnesses and connectors are connected securely.
NG
Go to step 27
A
6.READ VALUE OF INTELLIGENT TESTER (MAP, MAF AND FUEL PRESSURE)

Connect the intelligent tester to the DLC3.

Start the engine and warm it up and turn the intelligent tester ON.

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

Select the following menu items in order and read the values.

MAP
MAF
Fuel Press
  • Standard:
  • ItemEngine Speed *1Standard RangeDescription
    MAP *2 Engine switch ON (IG) (engine stopped) Same as atmospheric pressureIntake manifold internal pressure detected by manifold absolute pressure sensor
    Idling 85 to 93 kPa
    3,000 rpm (no engine load) 120 to 140 kPa
    3,000 rpm (driving with full throttle acceleration) *5 239 to 259 kPa
    3600 rpm (driving with full throttle acceleration) *5 245 to 265 kPa
    MAF *2, *4 Engine switch ON (IG) (engine stopped) 0 g/sIntake air volume detected by mass air flow meter
    Idling 2.5 to 5.52 g/s
    3,000 rpm (no engine load) 49 to 57 g/s
    3,000 rpm (driving with full throttle acceleration) *5 124 to 136 g/s
    3,600 rpm (driving with full throttle acceleration) *5 151 to 163 g/s
    Common Rail Pressure *3 Idling 37 to 43 MPaCommon rail internal fuel pressure
    2,000 rpm (no engine load) 47 to 53 MPa
    3,000 rpm (no engine load) 60 to 66 MPa
    3,000 rpm (driving with full throttle acceleration) *5 150 to 156 MPa
    3,600 rpm (driving with full throttle acceleration) *5 177 to 183 MPa
  • HINT:
  • *1: The A/C switch and all accessory switches should be OFF with a fully warm engine.
  • *2: This value is indicated when the ambient temperature is 25°C (77°F) and the atmospheric pressure is 101 kPa (758 mmHg, 29.83 in.Hg), and the stable boost pressure is maintained for approximately 10 seconds.
  • *3: This value is indicated when the ambient temperature is 25°C (77°F) and the atmospheric pressure is 101 kPa (758 mmHg, 29.83 in.Hg), and the vehicle is accelerated for approximately 10 seconds.
  • *4: When the mass air flow meter malfunctions, the MAF output may deviate from the standard (referential) range when the engine idles and is accelerated from 3,000 to 4,000 rpm with full throttle acceleration.
  • *5: Fully depress the accelerator pedal with the vehicle creeping at idle speed in 2nd gear.
  • Result:
  • ItemResultProceed to
    MAP, MAF, and Fuel press Standard rangeA
    MAP and MAF Outside standard rangeB
    Only MAP Outside standard rangeC
    Only MAF Outside standard rangeD
    Only Fuel Press Outside standard rangeE
B
Go to step 24
C
Go to step 34
A
7.READ VALUE OF INTELLIGENT TESTER (INJECTION FEED BACK VAL AND INJECTION VOLUME)

Select the following menu items in order and read the values.

Injection Feedback Val #1, #2, #3, and #4
Injection Volume
  • Standard:
  • ItemEngine Speed*Standard RangeDescription
    Injection Feedback Val #1Idling-3.0 to 3.0 mm3 Value of injector fuel injection volume compensates for differences in combustion condition of cylinders
    Positive values indicate control which corrects combustion degradation
    Negative values indicate control which corrects excessive combustion pressure
    If problems exist, "Injection Feedback Val" may deviate from the -3.0 and 3.0 mm range
    Injection Feedback Val #2Idling-3.0 to 3.0 mm3
    Injection Feedback Val #3Idling-3.0 to 3.0 mm3
    Injection Feedback Val #4Idling-3.0 to 3.0 mm3
    Injection VolumeIdling3.9 to 7.0 mm3 Fuel injection volume value controlled by ECU
    Controls NE signal, fuel temperature, engine coolant temperature, intake air temperature, boost pressure, atmospheric pressure, and EGR volume.
    If problems exist, "Injection Volume" may be outside the standard range
  • Result:
  • ResultProceed to
    Standard rangeA
    Injection Feedback Val #1 to #4 and/or Injection Volume outside standard rangeB
  • HINT:
  • *: The A/C switch and all accessory switches should be OFF, and the engine should be fully warmed up.
B
Go to step 14
A
8.CHECK INJECTOR COMPENSATION CODE

Read the injector compensation code.

  • HINT:
  • If the injector compensation code is not correctly registered, it may cause malfunctions .

Check the injector compensation code.

  • OK:
  • Compensation code of the installed injector is the same as the one registered in the ECM.
NG
Go to step 16
C
Go to step 23
A
15.PERFORM ACTIVE TEST BY INTELLIGENT TESTER (INJECTOR CUT FOR IDENTIFYING MALFUNCTIONING CYLINDER)

Connect the intelligent tester to the DLC3.

Start the engine and turn the intelligent tester ON.

Enter the following menus: Powertrain / Engine / Active Test / Control the Cylinder #1, #2, #3, and #4 Fuel Cut.

Check the four cylinders in sequence to identify any faulty cylinders by performing the power-balance inspection.

  • HINT:
If the engine idle does not change when an injector is disabled, the cylinder being tested is malfunctioning.
If the cylinder being tested is normal, there will be a significant change of idle speed when the fuel injection is stopped for that cylinder.
NEXT
REPLACE INJECTORASSEMBLY OF MALFUNCTIONING CYLINDER
16.PERFORM ACTIVE TEST BY INTELLIGENT TESTER (INJECTOR CUT FOR IDENTIFYING MALFUNCTIONING CYLINDER)

Connect the intelligent tester to the DLC3.

Start the engine and turn the intelligent tester ON.

Enter the following menus: Powertrain / Engine / Active Test / Control the Cylinder #1, #2, #3, and #4 Fuel Cut.

Check the four cylinders in sequence to identify any faulty cylinders by performing the power-balance inspection.

  • HINT:
If the engine idle does not change when an injector is disabled, the cylinder being tested is malfunctioning.
If the cylinder being tested is normal, there will be a significant change of idle speed when the fuel injection is stopped for that cylinder.
NEXT
17.CHECK CYLINDER COMPRESSION PRESSURE

Check the cylinder compression pressure .

  • Standard:
  • 2,700 kPa (27.5 kgf/cm2, 392 psi)
  • Minimum pressure:
  • 2,200 kPa (22.4 kgf/cm2, 319 psi)
  • Difference between each cylinder:
  • 500 kPa (5.1 kgf/cm2, 73 psi)
NG
CHECK ENGINE TO DETERMINE CAUSE OF LOW COMPRESSION
OK
18.CHECK MALFUNCTIONING CYLINDER'S INJECTOR FOR DEPOSITS
  • HINT:
  • If an injector is contaminated with deposits, the fuel injection volume deviates from the standard range. This may cause malfunctions.

Check the injector for any deposits.

  • Result:
  • Injector ConditionProceed to
    DepositsA
    No depositsB
B
REPLACE INJECTORASSEMBLY OF MALFUNCTIONING CYLINDER
A
19.CLEAN INJECTOR

Wipe away deposits from the tips of the injectors.

  • HINT:
Solvent or carbon removal agents help remove the deposits easily.
Exercise extreme care not to damage the injectors while wiping off the deposits.
NEXT
20.READ VALUE OF INTELLIGENT TESTER (INJECTION FEEDBACK VAL AND INJECTION VOLUME)

Reinstall the injector to the cylinder head.

Connect the intelligent tester to the DLC3.

Turn the engine switch ON (IG) and turn the intelligent tester ON.

Start the engine and warm it up.

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

Select the following menu items in order and read the values.

Injection Feedback Val #1, #2, #3, and #4
Injection Volume
  • Standard:
  • ItemEngine Speed*Reference Value
    Injection Feedback Val #1 to #4Idling-3.0 to 3.0 mm3
    Injection VolumeIdling3.9 to 7.0 mm3
  • HINT:
*: The A/C switch and all accessory switches should be OFF with a fully warm engine.
When the values are outside the standard range, deposits inside the injector may be causing the problem.
  • OK:
  • Values are within the standard range.
NG
REPLACE INJECTORASSEMBLY OF MALFUNCTIONING CYLINDER
OK
END
21.CHECK INJECTORS FOR DEPOSITS (EXCEPT FUEL ADDITION INJECTOR)
  • HINT:
  • If an injector is contaminated with deposits, the fuel injection volume deviates from the standard range. This may cause malfunctions.

Check the injector for any deposits.

  • Result:
  • Injector ConditionProceed to
    DepositsA
    No depositsB
B
REPLACE INJECTORS
A
22.CLEAN INJECTOR

Wipe away deposits from the tips of the injectors.

  • HINT:
Solvent or carbon removal agents help remove the deposits easily.
Exercise extreme care not to damage the injectors while wiping off the deposits.
NEXT
23.READ VALUE OF INTELLIGENT TESTER (INJECTION FEEDBACK VAL AND INJECTION VOLUME)

Reinstall the injector to the cylinder head.

Connect the intelligent tester to the DLC3.

Turn the engine switch ON (IG) and turn the intelligent tester ON.

Start the engine and warm it up.

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

Select the following menu items in order and read the values.

Injection Feedback Val #1, #2, #3, and #4
Injection Volume
  • Standard:
  • ItemEngine Speed*Reference Value
    Injection Feedback Val #1 to #4Idling-3.0 to 3.0 mm3
    Injection Volume #1 to #4Idling3.9 to 7.0 mm3
  • HINT:
*: The A/C switch and all accessory switches should be OFF with a fully warm engine.
When the values are outside the standard range, deposits inside the injector may be causing the problem.
  • OK:
  • Values are within the standard range.
NG
REPLACE INJECTORS
OK
END
24.CHECK EGR VALVE ASSEMBLY

Check the EGR valve assembly .

NG
REPLACE EGR VALVE ASSEMBLY
OK
25.INSPECT DIESEL THROTTLE BODY ASSEMBLY

Connect the intelligent tester to the DLC3.

Turn the engine switch ON (IG) and tester ON.

Enter the following menus: Powertrain / Engine / Diesel Throttle Angle.

Read the value.

  • Standard:
  • Engine switch ON (IG):
  • 0%
  • Idling (Warmed up engine):
  • 95%
  • Accelerator pedal fully depressed:
  • 0%
NG
REPLACE DIESEL THROTTLE BODY ASSEMBLY
OK
26.CHECK INTAKE SYSTEM

Check for air leakage and blockage between the air cleaner and turbocharger.

Check for air leakage and blockage between the turbocharger and intake manifold.

  • OK:
  • No leakage or blockage.
NG
REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA
OK
27.CHECK TURBOCHARGER SUB-ASSEMBLY (MECHANICAL PROBLEM)

Disconnect the air cleaner hose.

Use a mirror to visually check the turbocharger for any mechanical problems.

When the engine is cold, check that the impeller of the turbocharger rotates smoothly, and perform a contact check to confirm if it is damaged.

  • OK:
  • Impeller rotates smoothly and is not damaged.
NG
REPLACE TURBOCHARGER SUB-ASSEMBLY
OK
28.CHECK VACUUM HOSE (TURBOCHARGER - E-VRV, E-VRV - VACUUM PUMP)

Check that the vacuum hoses are installed correctly.

Check the vacuum hoses for any cracks and damage.

Check the vacuum hoses for air leaks and any blockage.

  • OK:
  • The vacuum hoses are correctly connected.
NG
REPAIR OR REPLACE VACUUM HOSE
OK
29.CHECK E-VRV FOR TURBOCHARGER CONTROL

Check the E-VRV .

NG
REPLACE E-VRV FOR TURBOCHARGER CONTROL
OK
30.INSPECT TURBOCHARGER ACTUATOR

Inspect the actuator.

  • OK:
  • The valve has no contamination and it moves smoothly.
NG
REPLACE TURBOCHARGER SUB-ASSEMBLY
OK
31.CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

Connect the intelligent tester to the DLC3.

Start the engine, warm it up, and turn the intelligent tester ON.

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

Select the following menu items in order and read the values.

MAP
MAF
Fuel Press
  • Standard:
  • ItemEngine Speed *1Standard RangeDescription
    MAP *2 Engine switch ON (IG) (engine stopped) Same as atmospheric pressureIntake manifold internal pressure detected by manifold absolute pressure sensor
    Idling 85 to 93 kPa
    3,000 rpm (no engine load) 120 to 140 kPa
    3,000 rpm (driving with full throttle acceleration) *4 239 to 259 kPa
    3600 rpm (driving with full throttle acceleration) *4 245 to 265 kPa
    MAF *2, *3 Engine switch ON (IG) (engine stopped) 0 g/sIntake air volume detected by mass air flow meter
    Idling 2.5 to 5.52 g/s
    3,000 rpm (no engine load) 49 to 57 g/s
    3,000 rpm (driving with full throttle acceleration) *4 124 to 136 g/s
    3,600 rpm (driving with full throttle acceleration) *4 151 to 163 g/s
  • HINT:
  • *1: The A/C switch and all accessory switches should be OFF with a fully warm engine.
  • *2: This value is indicated when the ambient temperature is 25°C (77°F) and the atmospheric pressure is 101 kPa (758 mmHg, 29.83 in.Hg), and the stable boost pressure is maintained for approximately 10 seconds.
  • *3: When the mass air flow meter malfunctions, the MAF output may deviate from the standard (referential) range when the engine idles and is accelerated from 3,000 to 4,000 rpm with full throttle acceleration.
  • *4: Fully depress the accelerator pedal with the vehicle creeping at idle speed in 2nd gear.
  • OK:
  • The values are within the standard range.
OK
END
NG
32.REPLACE EXHAUST MANIFOLD CONVERTER SUB-ASSEMBLY
NEXT
33.CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

Connect the intelligent tester to the DLC3.

Start the engine, warm it up, and turn the intelligent tester ON.

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

Select the following menu items in order and read the values.

MAP
MAF
Fuel Press
  • Standard:
  • ItemEngine Speed *1Standard RangeDescription
    MAP *2 Engine switch ON (IG) (engine stopped) Same as atmospheric pressureIntake manifold internal pressure detected by manifold absolute pressure sensor
    Idling 85 to 93 kPa
    3,000 rpm (no engine load) 120 to 140 kPa
    3,000 rpm (driving with full throttle acceleration) *4 239 to 259 kPa
    3600 rpm (driving with full throttle acceleration) *4 245 to 265 kPa
    MAF *2, *3 Engine switch ON (IG) (engine stopped) 0 g/sIntake air volume detected by mass air flow meter
    Idling 2.5 to 5.52 g/s
    3,000 rpm (no engine load) 49 to 57 g/s
    3,000 rpm (driving with full throttle acceleration) *4 124 to 136 g/s
    3,600 rpm (driving with full throttle acceleration) *4 151 to 163 g/s
  • HINT:
  • *1: The A/C switch and all accessory switches should be OFF with a fully warm engine.
  • *2: This value is indicated when the ambient temperature is 25°C (77°F) and the atmospheric pressure is 101 kPa (758 mmHg, 29.83 in.Hg), and the stable boost pressure is maintained for approximately 10 seconds.
  • *3: When the mass air flow meter malfunctions, the MAF output may deviate from the standard (referential) range when the engine idles and is accelerated from 3,000 to 4,000 rpm with full throttle acceleration.
  • *4: Fully depress the accelerator pedal with the vehicle creeping at idle speed in 2nd gear.
  • OK:
  • The values are within the standard range
NG
REPLACE TURBOCHARGER SUB-ASSEMBLY
OK
END
34.CHECK AND REPLACE FUEL FILTER ASSEMBLY
NEXT
35.CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

Connect the intelligent tester to the DLC3.

Start the engine and warm it up, and turn the intelligent tester ON.

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

Select the following menu item and read the values.

Fuel Press
  • Standard:
  • ItemEngine Speed *1Reference Value
    Fuel PressIdling37 to 43 MPa
    Fuel Press2,000 rpm (no engine load)47 to 53 MPa
    Fuel Press3,000 rpm (no engine load)60 to 66 MPa
    Fuel Press3,600 rpm (driving with full throttle acceleration) *2177 to 183 MPa
  • HINT:
  • *1: The A/C switch and all accessory switches should be OFF, and the engine should be fully warmed up.
  • *2: Fully depress the accelerator pedal with the vehicle creeping at idle speed in 2nd gear.
  • OK:
  • The values are within the standard range.
OK
END
NG
36.INSPECT COMMON RAIL ASSEMBLY (FUEL PRESSURE SENSOR)
Ecd System - Lack Of Power Or Hesitation. 2AD-FHV ENGINE CONTROL SYSTEM. Lexus IS250 IS220d GSE20 ALE20

Disconnect the E65 fuel sensor connector.

Measure the resistance between each terminal of the fuel pressure sensor connector.

  • Standard resistance:
  • Tester ConnectionSpecified Condition
    PR (E65-5) - E2 (E65-4)16.4 kΩ or less
    PR2 (E65-2) - E2S (E65-3)16.4 kΩ or less
    PR (E65-5) - VC (E65-6)3 kΩ or less
    PR2 (E65-2) - VCS (E65-1)3 kΩ or less

Reconnect the fuel pressure sensor connector.

NG
REPLACE COMMON RAIL ASSEMBLY
OK
37.INSPECT SUPPLY PUMP ASSEMBLY

Measure the resistance of the suction control valve terminals.

  • Standard resistance:
  • ConditionSpecified Condition
    20°C (68°F)1.9 to 2.3 Ω
NG
REPLACE SUPPLY PUMP ASSEMBLY
OK
CHECK AND REPLACE COMMON RAIL ASSEMBLY (PRESSURE DISCHARGE VALVE)