Ecd System Engine Knocking Or Rattling

DESCRIPTION

INSPECTION PROCEDURE

CHECK SOUND AREA

READ OUTPUT DTCS (RELATING TO ENGINE)

CHECK INJECTOR COMPENSATION CODE

TAKE SNAPSHOT DURING IDLING AND 4000 RPM (AFTER ENGINE WARMED UP)

CHECK SNAPSHOT (INJECTION FEEDBACK VAL #1 TO #4 AND INJECTION VOLUME)

CHECK SNAPSHOT (FUEL PRESS AND TARGET COMMON RAIL PRESSURE)

CHECK THE TEMPERATURE WHEN KNOCKING OCCURS

INSPECT GLOW PLUG (RESISTANCE)

TAKE SNAPSHOT DURING IDLING (WHEN ENGINE COLD)

CHECK SNAPSHOT (INJECTION FEEDBACK VAL #1 TO #4)

REPLACE INJECTOR ASSEMBLIES OF ALL CYLINDERS

CHECK CYLINDER COMPRESSION PRESSURE

REPLACE INJECTOR ASSEMBLY OF MALFUNCTIONING CYLINDER

CLEAN OR REPLACE FUEL FILTER

BLEED AIR FROM FUEL SYSTEM

PERFORM ECM INITIALIZATION AND REGISTER INJECTOR COMPENSATION CODE

CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

REPLACE FUEL SUPPLY PUMP ASSEMBLY (SUCTION CONTROL VALVE)

BLEED AIR FROM FUEL SYSTEM

PERFORM FUEL SUPPLY PUMP INITIALIZATION

CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

READ VALUE USING INTELLIGENT TESTER (MAP AND ATMOSPHERE PRESSURE)

BASIC INSPECTION

DESCRIPTION

HINT:

1. 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.
   
2. Check that the vehicle has not been modified in any way prior to the vehicle inspection.
   

INSPECTION PROCEDURE

HINT:

1. This troubleshooting procedure checks for knocking and rattling.
   
2. Knocking is most likely to occur while the engine is idling.
   

NOTICE:

1. After replacing the ECM, the new ECM needs registration (Toyota Fortuner RM0000012XK005X.html) and initialization (Toyota Fortuner RM0000012X2005X.html).
   
2. After replacing the fuel supply pump, the ECM needs initialization (Toyota Fortuner RM0000012X2005X.html).
   
3. After replacing an injector assembly, the ECM needs registration (Toyota Fortuner RM0000012XK005X.html).
   

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

   Result

   Result	Proceed to
   Combustion noise from engine	A
   Noise from specific part	B

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 DTCs.
   

   Result

   Result	Proceed to
   No output	A
   Engine related DTCs	B

NOTICE:

Injector compensation codes are unique, 30-digit, alphanumeric values printed on the head portion of each injector assembly. If an incorrect injector compensation code is input into the ECM, the engine may rattle or engine idling may become rough. In addition, engine failure may occur and the life of the engine may be shortened.

1. Check the injector compensation code (Toyota Fortuner RM0000012XK005X.html).
   

   OK:

   Compensation codes of the installed injector assemblies are the same as the compensation codes registered in the ECM.
   

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 / Data List / All Data.
   

4. Take a snapshot of the following Data List items.
   

   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 list below is that of a normal vehicle, but as the data varies between individual vehicles, this data should only be used for reference.
      
   2. Graphs like the ones shown below can be displayed by transferring the stored snapshot data from the tester to a PC. Intelligent Viewer must be installed on the PC.
      
   3. Check the Data List at idling and at 4000 rpm with no load after the engine is warmed up.
      

1. Check Injection Feedback Val #1 to #4 and Injection Volume in the snapshot taken when the engine was idling and at 4000 rpm with no load.
   
   

   Result

   Result	Proceed to
   Injection Feedback Val for at least one cylinder is more than +3 mm3/st	A
   Injection Volume is 7.5 mm3/st or less at 4000 rpm	B
   Except above	C

1. Check Fuel Press and Target Common Rail Pressure in the snapshot taken when the engine was warmed up and idling.
   

   OK:

   Fuel Press is within +/-5000 kPa of Target Common Rail Pressure.
   

1. Check the temperature when knocking trouble occurs.
   
   

   Result

   Result	Proceed to
   Knocking occurs only in cold engine	A
   Knocking occurs both in cold and warmed up engine	B

1. Inspect the glow plug (Toyota Fortuner RM0000013XN005X.html).
   

1. Make sure that the engine is cold so that the snapshot can be taken under the correct conditions.
   

2. Connect the intelligent tester to the DLC3.
   

3. Start the engine and turn the tester on.
   

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

5. Take a snapshot of the following Data List items.
   

   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 list below is that of a normal vehicle, but as the data varies between individual vehicles, this data should only be used for reference.
      
   2. Graphs like the ones shown below can be displayed by transferring the stored snapshot data from the tester to a PC. Intelligent Viewer must be installed on the PC.
      

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

   Result

   Result	Proceed to
   Injection Feedback Val for at least one cylinder is more than +3 mm3/st	A
   Except above	B

1. Replace the injector assemblies (Toyota Fortuner RM0000014FZ006X.html).
   

   NOTICE:

   1. When replacing the injector assembly for a cylinder, always be sure to use a new injection pipe.
      
   2. Follow the procedure in the repair manual and temporarily install the injection pipes and nozzle leakage pipe, and then correctly position the injector assemblies. After that, tighten parts according to the torque specifications.
      
   3. 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.
      
   4. If an injector assembly deteriorates and malfunctions, other problems such as knocking, rough idle, etc. may occur.
      
   5. If an injector assembly becomes out of position, it is possible that the seal between the injector assembly and injection pipe may become incomplete, resulting in a fuel leak.
      

1. Check the cylinder compression pressure (Toyota Fortuner RM000001473004X_01_0002.html).
   

   HINT:

   When compression is low, there may be cracks in the piston or the injector may be installed improperly.

1. Replace the injector assembly of the malfunctioning cylinder (Toyota Fortuner RM0000014FZ006X.html).
   

   NOTICE:

   1. When replacing the injector assembly for a cylinder, always be sure to use a new injection pipe.
      
   2. Follow the procedure in the repair manual and temporarily install the injection pipes and nozzle leakage pipe, and then correctly position the injector assemblies. After that, tighten parts according to the torque specifications.
      
   3. 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.
      
   4. If an injector assembly deteriorates and malfunctions, other problems such as knocking, rough idle, etc. may occur.
      
   5. If an injector assembly becomes out of position, it is possible that the seal between the injector assembly and injection pipe may become incomplete, resulting in a fuel leak.
      

1. Clean the interior of the fuel filter case.
   

2. If the fuel filter is obviously dirty or clogged, replace the fuel filter.
   

1. Bleed the air from the fuel system (Toyota Fortuner RM0000014FK006X_01_0002.html).
   

1. Perform the ECM initialization.
   

   
   
   

   1. Connect terminals 13 (TC) and 4 (CG) of the DLC3.
      

   2. Turn the ignition switch to ON for 50 minutes or more.
      

      NOTICE:

      1. Perform ECM initialization only when the injectors for all the cylinders have been replaced.
         
      2. It is necessary to wait for 50 minutes or more. Otherwise, ECM initialization is not completed.
         

   3. Turn the ignition switch off.
      

   4. Disconnect terminals 13 (TC) and 4 (CG).
      

2. Register the injector compensation codes (Toyota Fortuner RM0000012XK005X.html).
   

1. Check whether the knocking has been successfully repaired.
   

1. Replace the fuel supply pump assembly (Toyota Fortuner RM0000014FO006X.html).
   

   HINT:

   If the common rail pressure becomes too high when transitioning due to problems with SCV operation, knocking noise worsens.

1. Bleed the air from the fuel system (Toyota Fortuner RM0000014FK006X_01_0002.html).
   

1. Perform fuel supply pump initialization (Toyota Fortuner RM0000012X2005X.html).
   

1. Check whether the knocking has been successfully repaired by starting the 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 / Data List / MAP and Atmosphere Pressure.
   

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

   Standard:

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

   HINT:

   1. 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.
      
   2. 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

1. Check the fuel quality.
   

2. Check the fuel for air.
   

3. Check the fuel system for blockages.
   

4. Check the air filter.
   

5. Check the engine oil.
   

6. Check the engine coolant.
   

7. Check the engine idling speed and maximum engine speed.
   

8. Check the vacuum pump.