Ecd System Engine Difficult To Start Or Stalling

DESCRIPTION

INSPECTION PROCEDURE

CHECK ENGINE CRANKING CONDITION

CHECK BATTERY CONDITION

CHECK COMMUNICATION BETWEEN INTELLIGENT TESTER AND ECM

READ VALUE USING INTELLIGENT TESTER (CLUTCH SWITCH)

READ ALL OUTPUT DTCS

CHECK FUEL RECEIVER GAUGE (AMOUNT OF FUEL)

CHECK INITIALIZATION (FUEL SUPPLY PUMP)

READ OUTPUT DTC (RELATED TO ENGINE)

TAKE SNAPSHOT DURING STARTING AND IDLING

CHECK SNAPSHOT (FUEL PRESS)

CHECK ENGINE STARTING CONDITION

INSPECT COMMON RAIL ASSEMBLY

CHECK IF FUEL IS BEING SUPPLIED TO FUEL SUPPLY PUMP ASSEMBLY

CHECK HARNESS AND CONNECTOR (SUCTION CONTROL VALVE - ECM)

REPLACE SUCTION CONTROL VALVE

BLEED AIR FROM FUEL SYSTEM

PERFORM FUEL SUPPLY PUMP INITIALIZATION

READ VALUE USING INTELLIGENT TESTER (FUEL PRESS)

INSPECT INJECTOR ASSEMBLY (INSPECTION FOR VALVE CLOSING PROBLEM)

REPLACE COMMON RAIL

BLEED AIR FROM FUEL SYSTEM

READ VALUE USING INTELLIGENT TESTER (FUEL PRESS)

INSPECT INJECTOR COMPENSATION CODE

CHECK DATA LIST

PERFORM ACTIVE TEST USING INTELLIGENT TESTER (CONTROL THE CYLINDER #1 TO #4 FUEL CUT)

PERFORM ACTIVE TEST USING INTELLIGENT TESTER (CHECK THE CYLINDER COMPRESSION)

CHECK CYLINDER COMPRESSION PRESSURE OF MALFUNCTIONING CYLINDER

REPLACE INJECTOR ASSEMBLY OF MALFUNCTIONING CYLINDER

CHECK TEMPERATURE WHEN STARTING TROUBLE OCCURS

INSPECT ENGINE COOLANT TEMPERATURE SENSOR

INSPECT GLOW PLUG ASSEMBLY (RESISTANCE)

CHECK FUEL QUALITY

CHECK ENGINE STARTING CONDITION

CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

CHECK SNAPSHOT

INSPECT INJECTOR DRIVER (POWER SOURCE)

INSPECT INJECTOR ASSEMBLY

REPLACE INJECTOR ASSEMBLIES OF ALL CYLINDERS

BLEED AIR FROM FUEL SYSTEM

REGISTER INJECTOR COMPENSATION CODE AND PERFORM PILOT QUANTITY LEARNING

CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

CHECK AND REPAIR OR REPLACE CLOGGED FUEL PIPE (INCLUDING FROZEN FUEL) (FUEL TANK - FUEL SUPPLY PUMP)

ADD FUEL

BLEED AIR FROM FUEL SYSTEM

CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

CHECK VC OUTPUT CIRCUIT

CHECK COMMUNICATION BETWEEN INTELLIGENT TESTER AND ECM

CHECK ECM POWER SOURCE CIRCUIT

CHECK COMMUNICATION BETWEEN INTELLIGENT TESTER AND ECM

ECD SYSTEM - Engine Difficult to Start or Stalling

DESCRIPTION

Faults and Symptoms of Common Rail Diesel Components

1. Engine Control
   
   

   Mass Air Flow Meter

   Main fault		Decrease in performance (foreign matter is stuck)
   Symptoms		Lack of power, black smoke
   Data List		MAF
   HINT: The maximum fuel injection volume is controlled according to the output from the mass air flow meter.

   
   

   Intake System

   Symptom and Corresponding Main Fault		Lack of power (no black smoke) due to air filter 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.

   
   

   Turbocharger System

   Main fault		Air leak in the turbocharged air passage ECM not operating well Turbocharger (turbine, bearing)
   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. VN Turbo Command 0%: Vanes fully open (drive rod contracts) Over 90%: Vanes fully closed (drive rod expands and turbo operates effectively)
   Diagnostic Point		Using the "Test the Turbo Charger Step Motor" Active Test, check the drive rod movement. Check the drive rod movement when the ignition switch is turned from ON to off.

   
   

   Exhaust System

   Main fault		Blockage
   Symptoms		Lack of power (high engine speed, under heavy load)
   Data List		MAP 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		Open circuit, glow plug relay fault
   Symptoms		Difficult to start, rough idle, knocking, white smoke (when cold)
   Data List		Check the glow plug indicator light
   Diagnostic Point		Measure the resistance of the glow plug

   
   

   Battery

   Main fault		Battery is depleted
   Symptoms		Difficult to start (cannot crank, crank speed is low), horn is quiet
   Data List		Battery Voltage When cranking, battery voltage is below 5 V.

   
   

   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 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.

   
   

   Start System

   Main fault		Starter system malfunction
   Symptoms		Difficult to start
   Data List		Starter Signal Ignition switch (STA) output: ON: Starter is operating OFF: Starter is not operating

2. Diesel Injection
   
   

   Fuel Supply Pump Assembly

   Main fault		-
   Symptoms		Difficult to start, engine stalling, rough idle, lack of power
   Data List		Fuel Press, Target Common Rail Pressure, Target Pump SCV Current In a stable condition (e.g. idling), Fuel Press is within 5000 kPa of "Target Common Rail Pressure". 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. HINT: The fuel pressure changes at engine start, but is approx. 25000 kPa at engine start after the engine is warmed up. When Target Pump SCV Current is 3000 mA or higher, the suction control valve has a tendency to become stuck.
   Diagnostic Trouble Code		Even if Fuel Press is below Target Common Rail Pressure, a DTC will not be stored.

   
   

   Fuel Filter Element Sub-assembly

   Main fault		Blockage
   Symptoms		Difficult to start, engine stalling, rough idle, lack of power
   Data List		Fuel Press, Target Common Rail Pressure In a stable condition (e.g. idling), the fuel pressure is within 5000 kPa of "Target Common Rail Pressure". 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. HINT: 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 Fuel Press 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 with the engine warmed up (engine coolant temperature is higher than 70°C (158°F)).

   
   

   Pressure Discharge Valve

   Main fault		Does not completely close
   Symptoms		Difficult to start, engine stall, rough idle, lack of power

   
   

   Injector Driver

   Main fault		Circuit fault: The injector assembly does not open.
   Symptoms		Difficult to start, rough idle, lack of power, black smoke, white smoke, knocking
   Data List		Same as injector assembly
   Diagnostic Trouble Code		When the injector driver has a fault, some DTCs may be stored.

   
   

   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		Fuel Press, Target Common Rail Pressure Slowly raise the engine speed from idling to 3000 rpm with the vehicle stopped and check that Fuel Press follows Target Common Rail Pressure. If the fuel pressure sensor malfunctions, the actual fuel pressure may deviate from the target fuel pressure (however, the value may not deviate even when a malfunction is present).
   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 EGR
   
   

   EGR System

   Main fault		Does not move smoothly Does not close completely
   Symptoms		Rough idle EGR valve stuck closed: A loud turbocharger sound. EGR valve stuck open: Difficult to start (does not stall), black smoke, lack of power (if there is an excess in the quantity of EGR and there is a heavy load, when the vehicle starts moving, a lack of power will be felt).
   Data List		Actual EGR Valve Pos., Target EGR Pos. Generally, Actual EGR Valve Pos. = Target EGR Pos. +/-5% (fully closed: 0%, fully open: 100%). Using the EGR valve Active Test, check whether Actual EGR Valve Pos. follows Target EGR Pos. (the engine coolant temperature and intake air temperature should be considered when a malfunction occurs). EGR valve is fully closed when the ignition switch is turned to ON (engine stopped). EGR valve opens to the halfway point at idling after the engine is warmed up. EGR Close Lrn. Val., EGR Close Lrn. Status When leaving the vehicle idling, when EGR Close Lrn. Status is OK, the normal range of EGR Close Lrn. Val. is 0 to 1 V. In cases when EGR Close Lrn. Status. is NG or EGR Close Lrn. Val. is out of the normal range (0 to 1 V), it is possible that the EGR valve cannot completely close.

4. 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 open 100%: Fully closed When the ignition switch is ON (the engine is 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.

Data List Related to Starting Trouble

1. MAP
   
2. MAF
   
3. Intake Air
   
4. Coolant Temp
   
5. Battery Voltage
   
6. Starter Signal
   
7. Engine Speed of Cyl #1 (to #4)
   
8. Target Common Rail Pressure
   
9. Fuel Press
   
10. Target Pump SCV Current
    
11. Injection Feedback Val #1 (to #4)
    
12. Injection Volume
    
13. Actual Throttle Position
    
14. Target EGR Position
    
15. Actual EGR Valve Pos.
    
16. EGR Close Lrn. Status
    
17. EGR Close Lrn. Val.
    

INSPECTION PROCEDURE

Explanation of Symptom

Starting Trouble

For good starting it is essential to have: Sufficient cranking speed. Properly operating engine preheating system. Good quality fuel. The fuel is ignited by the heat which is generated by compression pressure. With problems such as a depleted battery, the crankshaft speed can become low, or if the engine compression is poor due to leakage, the compression pressure will not rise and there will be difficulty starting. When the engine is cold, even if there is compression heat, it will escape from the combustion chamber. For this reason, when the engine is started when it is cold, the glow plugs heat the compressed air. Also, after starting the engine, by charging the glow plugs for a fixed time set according to the engine coolant temperature, diesel knocking and white smoke are prevented. The quantity of fuel injected is determined by the fuel pressure and also the amount of time the injector assembly is open.

Trouble Area Chart According to Problem Cause

NOTICE:

1. After replacing the ECM, the new ECM needs registration (LandCruiser RM0000012XK0ARX.html) and initialization (LandCruiser RM000000TIN08CX.html).
   
2. After replacing the fuel supply pump assembly, the ECM needs initialization (LandCruiser RM000000TIN08CX.html).
   
3. After replacing an injector assembly, the ECM needs registration (LandCruiser RM0000012XK0ARX.html).
   

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 age. Do not assume the vehicle is normal when the Data List outputs standard values. There may be concealed factors of the malfunction.

1.CHECK ENGINE CRANKING CONDITION

1. Check the engine cranking condition.
   

   Result

   Result	Proceed to
   Does not crank at all.	A
   Low cranking speed. HINT: When cranking speed is low, especially when the temperature is low, check if the engine oil grade matches the recommendation.	B
   Cranking is OK.	C

B	CHECK BATTERY CONDITION (LandCruiser RM0000013Y001ZX_01_0001.html)
C	Go to step 6

A

2.CHECK BATTERY CONDITION

1. Check the battery condition (LandCruiser RM0000013Y001ZX_01_0001.html).
   

NG	REPLACE BATTERY

OK

3.CHECK COMMUNICATION BETWEEN INTELLIGENT TESTER AND ECM

1. Connect the intelligent tester to the DLC3.
   

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

3. Check if the normal starting screen appears (check whether communication with the ECM is possible).
   

   HINT:

   Use a tester that is able to communicate with other vehicles.

   OK:

   Communication is possible (vehicle can be recognized).
   

NG	Go to step 46

OK

4.READ VALUE USING INTELLIGENT TESTER (CLUTCH SWITCH)

1. Connect the intelligent tester to the DLC3.
   

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

3. Enter the following menus: Powertrain / Engine and ECT / Data List / All Data / Clutch Switch.
   

4. Read the value displayed on the tester.
   

   OK:

   Tester Display	Condition	Specified Condition
   Clutch Switch	Clutch pedal depressed	ON

   Result

   Result	Proceed to
   OK	A
   NG	B

B	REPLACE CLUTCH SWITCH ASSEMBLY

A

5.READ ALL OUTPUT DTCS

1. Connect the intelligent tester to the DLC3.
   

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

3. Enter the following menus: Utility / All Codes.
   

   Result

   Result	Proceed to
   No DTC is output	A
   DTCs related to engine are output	B

B	GO TO RELATED DTC (LandCruiser RM0000031HW07LX.html)

A
END

6.CHECK FUEL RECEIVER GAUGE (AMOUNT OF FUEL)

1. Check if the fuel level is low.
   

   Result

   Result	Proceed to
   The indicator (fuel warning light) is not illuminated	A
   The indicator (fuel warning light) is illuminated	B

B	Go to step 43

A

7.CHECK INITIALIZATION (FUEL SUPPLY PUMP)

1. When the engine does not start or another problem such as rough idling is present, perform initialization and check to see if the problem symptoms disappear. If the problem symptoms do not disappear, perform the next procedure.
   

   HINT:

   When replacing the ECM, the fuel supply pump initialization must be performed (LandCruiser RM000000TIN08CX.html).

NEXT

8.READ OUTPUT DTC (RELATED TO ENGINE)

1. Connect the intelligent tester to the DLC3.
   

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

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

4. Read the DTCs.
   

   Result

   Result	Proceed to
   No DTC is output	A
   DTCs related to engine are output	B

B	REPAIR OR REPLACE ENGINE CONTROL SYSTEM ACCORDING TO DTC OUTPUT (LandCruiser RM0000031HW07LX.html)

A

9.TAKE SNAPSHOT DURING STARTING AND IDLING

1. Connect the intelligent tester to the DLC3.
   

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

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

4. Take a snapshot of the following Data List items with the intelligent tester during "ignition switch ON (5 seconds) → Starting → Idling (10 seconds)".
   

   HINT:

   1. 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 data in the illustration below is that of a normal vehicle, but as the data varies between individual vehicles, this data should only be used for reference.
      
   2. When there is trouble starting with a cold engine, take the snapshot when the engine is cold. Then warm up the engine (engine coolant temperature is 70°C (158°F) or higher) and after idling the vehicle for 1 minute (A/C off, electrical load off), take a snapshot of the data for 15 seconds while idling.
      
   3. Graphs like the ones shown below can be displayed by transferring the stored snapshot from the tester to a PC. Intelligent Viewer must be installed on the PC.
      

NEXT

10.CHECK SNAPSHOT (FUEL PRESS)

1. Check Fuel Press in the snapshot taken when the engine was starting.
   

   Result

   Result	Proceed to
   2 seconds after Starter Signal turns from OFF to ON, Fuel Press is below 20000 kPa HINT: As long as the fuel pressure remains below 5000 kPa, the ECM stops sending the injection command signal (IJT) to the injector driver, and then the actual injection duration remains 0 microseconds.	A
   2 seconds after Starter Signal turns from OFF to ON, Fuel Press is 50000 kPa or higher	B
   Except above	C

   HINT:

   1. Fuel pressure is about 30000 to 40000 kPa when the engine is cranking and the engine coolant temperature is 0°C (32°F) or higher.
      
   2. Fuel pressure increases rapidly during cranking.
      

B	Go to step 35
C	Go to step 23

A

11.CHECK ENGINE STARTING CONDITION

1. Check whether the engine can be started.
   

   HINT:

   If there are deposits in the injector assemblies and they are left for a long time, the injector assemblies for all the cylinders may become stuck.

   Result

   Result	Proceed to
   The engine can be started.	A
   There is no initial combustion even when the engine can be cranked.	B

B	Go to step 13

A

12.INSPECT COMMON RAIL ASSEMBLY

1. Inspect the common rail assembly (LandCruiser RM0000044W200PX.html).
   

OK	Go to step 43
NG	Go to step 20

13.CHECK IF FUEL IS BEING SUPPLIED TO FUEL SUPPLY PUMP ASSEMBLY

1. Disconnect the inlet hose from the fuel supply pump assembly.
   

2. Operate the priming pump and check that fuel is being supplied to the fuel supply pump assembly.
   

   OK:

   Fuel is properly supplied to the fuel supply pump when the priming pump is operated.
   

   HINT:

   1. When there is a lack of fuel, fuel pressure drops.
      
   2. Inspect for fuel filter element sub-assembly clogging (check that the fuel filter element sub-assembly is not clogged).
      

3. Reconnect the inlet hose.
   

NG	Go to step 42

OK

14.CHECK HARNESS AND CONNECTOR (SUCTION CONTROL VALVE - ECM)

1. Disconnect the suction control valve connector.
   

2. Disconnect the ECM connector.
   

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

   Standard Resistance (Check for Open):

   Tester Connection	Condition	Specified Condition
   C71-1 - C92-23 (PCV+)	Always	Below 1 Ω
   C71-2 - C92-12 (PCV-)	Always	Below 1 Ω

   Standard Resistance (Check for Short):

   Tester Connection	Condition	Specified Condition
   C71-1 or C92-23 (PCV+) - Body ground	Always	10 kΩ or higher
   C71-2 or C92-12 (PCV-) - Body ground	Always	10 kΩ or higher

4. Reconnect the suction control valve connector.
   

5. Reconnect the ECM connector.
   

NG	REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

15.REPLACE SUCTION CONTROL VALVE

1. Replace the suction control valve (LandCruiser RM000004MF600KX.html).
   

NEXT

16.BLEED AIR FROM FUEL SYSTEM

1. Bleed the air from the fuel system (LandCruiser RM000002SY803CX_01_0002.html).
   

NEXT

17.PERFORM FUEL SUPPLY PUMP INITIALIZATION

1. Perform fuel supply pump initialization (LandCruiser RM000000TIN08CX.html).
   

NEXT

18.READ VALUE USING INTELLIGENT TESTER (FUEL PRESS)

1. Connect the intelligent tester to the DLC3.
   

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

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

4. Start the engine.
   

5. Read the Fuel Press values while cranking and idling the engine.
   

   Result

   Result	Proceed to
   The engine cannot be started or the engine can be started but Fuel Press is below 20000 kPa 2 seconds after the starter signal changes from OFF to ON	B
   Except above	A

B	Go to step 19

A
END

19.INSPECT INJECTOR ASSEMBLY (INSPECTION FOR VALVE CLOSING PROBLEM)

1. Remove the glow plug assembly for all the cylinders (LandCruiser RM000000JIT01DX.html).
   

2. Visually check if there is fuel on the glow plugs.
   

   HINT:

   1. If there is fuel on a glow plug, fuel may be leaking from an injector assembly.
      
   2. After replacing an injector assembly, make sure that the common rail pressure (fuel pressure) is within 5000 kPa of the target fuel pressure while cranking the engine.
      
   3. If there is fuel on a glow plug, fuel may have mixed with the engine oil. Check the engine oil amount and whether the engine oil smells of diesel fuel. If the oil level is above the full line or the engine oil smells of diesel fuel, replace the engine oil.
      

   Result

   Result	Proceed to
   No fuel on glow plugs	A
   Fuel on glow plugs	B

3. Install the glow plug assembly (LandCruiser RM000000JIQ01GX.html).
   

B	Go to step 28

A

20.REPLACE COMMON RAIL

1. Replace the common rail (LandCruiser RM0000044W3015X.html).
   

NEXT

21.BLEED AIR FROM FUEL SYSTEM

1. Bleed the air from the fuel system (LandCruiser RM000002SY803CX_01_0002.html).
   

NEXT

22.READ VALUE USING INTELLIGENT TESTER (FUEL PRESS)

1. Connect the intelligent tester to the DLC3.
   

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

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

4. Start the engine.
   

5. Read the Fuel Press values while cranking and idling the engine.
   

   Result

   Result	Proceed to
   The engine cannot be started or the engine can be started but Fuel Press is below 20000 kPa 2 seconds after the starter signal changes from OFF to ON	B
   Except above	A

B	Go to step 38

A
END

23.INSPECT INJECTOR COMPENSATION CODE

1. Read the injector compensation code (LandCruiser RM0000012XK0ARX_02_0006.html).
   

   OK:

   Compensation codes stored in the ECM match compensation codes of the installed injector assemblies.
   

NG	REGISTER INJECTOR COMPENSATION CODE AND PERFORM PILOT QUANTITY LEARNING (LandCruiser RM0000012XK0ARX.html)

OK

24.CHECK DATA LIST

1. Check Injection Feedback Val #1 to #4 and Injection Volume in the snapshot taken when the engine was idling.
   

   Result

   Result	Proceed to
   Injection Feedback Val #1 to #4 are more than 3 mm3/st. HINT: There may be a malfunction in the corresponding cylinder.	A
   Injection Feedback Val #1 to #4 are 3 mm3/st or less. Injection Volume is more than 10 mm3/st.	B*
   Injection Feedback Val #1 to #4 are 3 mm3/st or less. Injection Volume is 10 mm3/st or less.	C

   HINT:

   1. *: When this case occurs, usually symptoms may be noticeable, such as difficulty starting, rough idling, knocking or black smoke at high common rail pressure.
      
   2. The shift lever should be in neutral and the A/C switch and all accessory switches should be off.
      

B	Go to step 38
C	Go to step 29

A

25.PERFORM ACTIVE TEST USING INTELLIGENT TESTER (CONTROL THE CYLINDER #1 TO #4 FUEL CUT)

HINT:

Use this Active Test to determine the malfunctioning cylinder.

1. Connect the intelligent tester to the DLC3.
   

2. Start the engine and turn the tester on.
   

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

HINT:

1. If the engine idle speed does not change when an injector assembly is disabled, the cylinder being tested is malfunctioning.
   
2. If the cylinder being tested is normal, there will be a significant change in idle speed when the fuel injection is stopped for that cylinder.
   

NEXT

26.PERFORM ACTIVE TEST USING INTELLIGENT TESTER (CHECK THE CYLINDER COMPRESSION)

HINT:

Use this Active Test to help determine whether a cylinder has compression loss or not.

1. Connect the intelligent tester to the DLC3.
   

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

3. Enter the following menus: Powertrain / Engine and ECT / Active Test / Check the Cylinder Compression / Data List / Compression / Engine Speed of Cyl #1 to #4.
   

4. Check the engine speed during the Active Test.
   

   OK:

   The values of Engine Speed Cyl #1 to #4 are within 10 rpm of each other.
   

   HINT:

   When cranking, if the speed of a cylinder is approximately 100 rpm more than the other cylinders, there is probably a loss of compression in that cylinder.

OK	Go to step 28
NG	Go to step 27

27.CHECK CYLINDER COMPRESSION PRESSURE OF MALFUNCTIONING CYLINDER

HINT:

Measure the compression of the cylinder that had a high speed during the "Check the Cylinder Compression" Active Test.

1. Check the cylinder compression pressure (LandCruiser RM00000147302LX_01_0002.html).
   

NG	CHECK ENGINE TO DETERMINE CAUSE OF LOW COMPRESSION

OK

28.REPLACE INJECTOR ASSEMBLY OF MALFUNCTIONING CYLINDER

HINT:

It can be determined that the injector assembly is faulty as the corresponding cylinder is malfunctioning, but has no compression loss.

1. Replace the injector assembly (LandCruiser RM0000044TN015X.html).
   

NEXT	Go to step 39

29.CHECK TEMPERATURE WHEN STARTING TROUBLE OCCURS

1. Check the temperature when starting trouble occurs.
   

Result

Result	Proceed to
Difficult to start only for cold engine.	A
Difficult to start both for cold and warmed up engine.	B

B	Go to step 32

A

30.INSPECT ENGINE COOLANT TEMPERATURE SENSOR

1. Inspect the engine coolant temperature sensor (LandCruiser RM0000013Z801QX.html).
   

NG	REPLACE ENGINE COOLANT TEMPERATURE SENSOR (LandCruiser RM0000013ZA01WX.html)

OK

31.INSPECT GLOW PLUG ASSEMBLY (RESISTANCE)

1. Inspect the glow plug (LandCruiser RM0000044ZK00RX_01_0001.html).
   

NG	REPLACE GLOW PLUG ASSEMBLY (LandCruiser RM000000JIT01DX.html)

OK

32.CHECK FUEL QUALITY

1. Check that fuel with a low cetane number is used.
   

NEXT

33.CHECK ENGINE STARTING CONDITION

1. Check whether the engine can be started.
   

   HINT:

   If there are deposits in the injector assemblies and they are left for a long time, the injector assemblies for all the cylinders may become stuck.

   Result

   Result	Proceed to
   The engine can be started.	A
   There is no initial combustion even when the engine can be cranked.	B

B	Go to step 38

A

34.CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

1. Check whether the difficulty starting has been successfully repaired by starting the engine.
   

NEXT
END

35.CHECK SNAPSHOT

HINT:

When all Data List values are OK and Fuel Press is higher than Target Common Rail Pressure, perform the following inspection.

NEXT

36.INSPECT INJECTOR DRIVER (POWER SOURCE)

1. Disconnect the injector driver connector.
   

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

   Standard Voltage:

   Tester Connection	Switch Condition	Specified Condition
   C88-2(+B) - C88-3(GND)	Ignition switch ON	11 to 14 V

   Text in Illustration

   *a	Front view of wire harness connector (to Injector Driver)

3. Reconnect the injector driver connector.
   

NG	GO TO INJECTOR CIRCUIT (LandCruiser RM000002V5Q08QX.html)

OK

37.INSPECT INJECTOR ASSEMBLY

HINT:

If there is no initial combustion during cranking, there may be air in the injector assemblies.

NEXT
END

38.REPLACE INJECTOR ASSEMBLIES OF ALL CYLINDERS

1. Replace the injector assemblies (LandCruiser RM0000044TN015X.html).
   

NEXT

39.BLEED AIR FROM FUEL SYSTEM

1. Bleed the air from the fuel system (LandCruiser RM000002SY803CX_01_0002.html).
   

NEXT

40.REGISTER INJECTOR COMPENSATION CODE AND PERFORM PILOT QUANTITY LEARNING

1. Register the injector compensation codes (LandCruiser RM0000012XK0ARX_02_0003.html).
   

2. Perform the injector pilot quantity learning (LandCruiser RM0000012XK0ARX_02_0009.html).
   

NEXT

41.CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

1. Connect the intelligent tester to the DLC3.
   

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

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

4. Start the engine.
   

5. Read the Fuel Press values while cranking and idling the engine.
   

   OK:

   The engine can be started and Fuel Press is 20000 kPa or higher 2 seconds after the starter signal changes from OFF to ON.
   

NEXT
END

42.CHECK AND REPAIR OR REPLACE CLOGGED FUEL PIPE (INCLUDING FROZEN FUEL) (FUEL TANK - FUEL SUPPLY PUMP)

1. Check and repair or replace the clogged fuel pipe.
   

NEXT	Go to step 44

43.ADD FUEL

1. Add fuel.
   

NEXT

44.BLEED AIR FROM FUEL SYSTEM

1. Bleed the air from the fuel system (LandCruiser RM000002SY803CX_01_0002.html).
   

NEXT

45.CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

1. Connect the intelligent tester to the DLC3.
   

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

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

4. Start the engine.
   

5. Read the Fuel Press values while cranking and idling the engine.
   

   OK:

   The engine can be started and Fuel Press is 20000 kPa or higher 2 seconds after the starter signal changes from OFF to ON.
   

NEXT
END

46.CHECK VC OUTPUT CIRCUIT

1. Check the VC output circuit (LandCruiser RM000001D6V0W9X.html).
   

NEXT

47.CHECK COMMUNICATION BETWEEN INTELLIGENT TESTER AND ECM

1. Connect the intelligent tester to the DLC3.
   

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

3. Check if the normal starting screen appears (check whether communication with the ECM is possible).
   

   HINT:

   Use a tester that is able to communicate with other vehicles.

   OK:

   Communication is possible (vehicle can be recognized).
   

NG	Go to step 48

OK
END

48.CHECK ECM POWER SOURCE CIRCUIT

1. Check the ECM power source circuit (LandCruiser RM000000TI20AJX.html).
   

NEXT

49.CHECK COMMUNICATION BETWEEN INTELLIGENT TESTER AND ECM

1. Connect the intelligent tester to the DLC3.
   

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

3. Check if the normal starting screen appears (check whether communication with the ECM is possible).
   

   HINT:

   Use a tester that is able to communicate with other vehicles.

   OK:

   Communication is possible (vehicle can be recognized).
   

NG	REPLACE ECM (LandCruiser RM0000013Z002CX.html)

OK
END