Malfunction Condition	Main Trouble Areas	Related Trouble Areas
Knocking and abnormal sound due to extremely rich combustion Abnormal sound due to friction between parts	Injector malfunctions Injector sliding malfunction Injector stuck closed Injector stuck open Deposits in injector Injector circuit malfunction Abnormal common rail pressure Supply pump Fuel pulsation sound Air in fuel Friction between parts Compression pressure	Injector compensation codes Fuel leakage Intake air system leakage Intake air system blockage EGR system Throttle valve system Fuel pressure sensor Manifold absolute pressure sensor Atmosphere air pressure sensor (built into ECM) Vehicle modifications Low quality fuel Lack of 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.

INSPECTION PROCEDURE

NOTICE:

After replacing the supply pump, the ECM needs initialization .

After replacing an injector, the ECM needs registration .

HINT:

This troubleshooting procedure checks for knocking and rattling.

Knocking is most likely to occur while the engine is idling.

1.CHECK ENGINE SOUND

Find source of the abnormal sound using a mechanic's stethoscope.

Result:
Result Proceed to
Sound from supply pump A
Sound from parts other than supply pump B

Go to step 10

Go to step 26

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:

Item	Engine Speed*	Standard Range	Description
Injection Feedback Val #1	Idling	-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 -3.0 and 3.0 mm range
Injection Feedback Val #2	Idling	-3.0 to 3.0 mm³
Injection Feedback Val #3	Idling	-3.0 to 3.0 mm³
Injection Feedback Val #4	Idling	-3.0 to 3.0 mm³
Injection Volume	Idling	3.9 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 standard range

Result:
Result Proceed to
Standard range A
Injection Feedback Val #1 to #4 and/or Injection Volume outside standard range B

HINT:

*: The A/C switch and all accessory switches should be OFF, and the engine should be fully warmed up.

Go to step 19

A

8.CHECK INJECTOR COMPENSATION CODE

HINT:

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

OK:
Compensation code of the installed injector is the same as the code registered in the ECM.

Go to step 24

A

14.PERFORM ACTIVE TEST BY INTELLIGENT TESTER (FUEL CUT FOR IDENTIFYING MALFUNCTION)

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:

While the engine is idling, if the idling stability variation is small despite cutting off the fuel injection, the cylinder is malfunctioning.

With normal cylinders, the engine idles roughly when the fuel injection is cut off.

NEXT

15.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)

Go to step 16

Go to step 21

A

20.PERFORM ACTIVE TEST BY INTELLIGENT TESTER (FUEL 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 and 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.

REPLACE INJECTOR ASSEMBLY OF MALFUNCTIONING CYLINDER

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 Condition Proceed to
Deposits A
No Deposits 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 displayed on the intelligent tester respectively.

Injection Feedback Val #1, #2, #3, and #4

Injection Volume

Standard:
Item Engine Speed* Reference Value
Injection Feedback Val #1 to #4 Idling -3.0 to 3.0 mm³
Injection Volume Idling 3.9 to 7.0 mm³

*: The A/C switch and all accessory switches should be OFF, and the engine should be fully warmed up.

HINT:

When the values are outside the standard range, deposits inside the injector may be causing the problem.

OK:
Values are within the standard range.

REPLACE INJECTORS

END

24.BLEED AIR FROM FUEL SYSTEM

To bleed air from the priming pump, pump the priming pump until it becomes hard and cannot be pumped any more.

NEXT

25.CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

Check whether the knocking has been successfully repaired by performing a driving test.

OK:
Malfunction has been repaired successfully.

END

26.INSPECT COMMON RAIL ASSEMBLY (FUEL PRESSURE SENSOR)

Ecd System - Engine Knocking Or Rattling. 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 Connection Specified 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.

REPLACE COMMON RAIL ASSEMBLY

OK

27.INSPECT SUPPLY PUMP ASSEMBLY

Measure the resistance of the suction control valve terminals.

Standard resistance:
Condition Specified Condition
20°C (68°F) 1.9 to 2.3 Ω

REPLACE SUPPLY PUMP ASSEMBLY

REPAIR OR REPLACE COMMON RAIL ASSEMBLY (PRESSURE DISCHARGE VALVE)

LEXUS IS250, IS220d / GSE20 ALE20

2AD-FHV ENGINE CONTROL SYSTEM

Lexus IS250 IS220d GSE20 ALE20

ECD SYSTEM