Ecd System (W/ Urea Scr System) After Treatment Control System

INSPECTION PROCEDURE

TAKE SNAPSHOT DURING IDLING AND 4000 RPM (PROCEDURE 1)

READ VALUE USING GTS (CATALYST DIFFERENTIAL PRESS)

REPLACE EXHAUST MANIFOLD CONVERTER SUB-ASSEMBLY

CATALYST RECORD CLEAR AND DPF DETERIORATION RECORD CLEAR

PERFORM PM FORCED REGENERATION

INSPECTION PROCEDURE

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 / Catalytic Converter.
   

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. Check the Data List at idling and at 4000 rpm with no load after the engine is warmed up.
      

1. Check Catalyst Differential Press in the snapshot taken in procedure 1 when the engine was running at 4000 rpm with no load.
   
   

   Result

   Result	Proceed to
   Catalyst Differential Press is more than 0.27	A
   Except above	B

1. Replace the front exhaust pipe assembly (LandCruiser RM000005UKF000X.html).
   

1. Connect the GTS to the DLC3.
   

2. Turn the engine switch on (IG) and turn the GTS on.
   

3. Enter the menu options in this order: Powertrain / Engine and ECT / Utility / Catalyst Record Clear.
   

4. Press "Next".
   

5. Press "Exit".
   

6. Enter the menu options in this order: Powertrain / Engine and ECT / Utility / DPF Deterioration Record Clear.
   

7. Press "Next".
   

8. Press "Exit".
   

1. Turn the engine switch on (IG).
   

2. Turn the engine switch off and wait for 30 seconds or more.
   

3. Turn the engine switch on (IG) and wait for 10 seconds or more
   

4. Connect the GTS to the DLC3.
   

5. Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher.
   

6. Maintain the maximum possible engine speed under no load for 10 seconds to blow out all soot from inside the exhaust pipe.
   

   HINT:

   1. If only a low engine speed is continuously maintained, soot may accumulate at the end of the catalyst.
      
   2. When soot accumulates at the end of the catalyst, it may not be possible to perform PM forced regeneration control normally.
      

7. Enter the following menus: Powertrain / Engine and ECT / Active Test / Activate the DPF Rejuvenate (PM)
   

8. Perform the Active Test.
   

   CAUTION:

   Be careful of the exhaust pipes and surrounding areas, as they become extremely hot when performing PM forced regeneration.

   HINT:

   When PM Accumulation Ratio is too low, Activate the DPF Rejuvenate (PM) cannot be performed. Therefore, rev the engine with no load at 3400 rpm for 5 to 10 minutes to increase PM Accumulation Ratio to 12% or more.

9. After 10 minutes have passed with the engine coolant temperature at 80°C (176°F) or higher during PM regeneration, check the value of Exhaust Temperature B1S2.
   

   HINT:

   1. PM forced regeneration takes 15 to 40 minutes to finish.
      
   2. The time it takes to complete PM forced regeneration changes depending on "PM Accumulation Ratio" and the vehicle operating conditions.
      
   3. If the value of "Catalyst Differential Press" increases too much during the PM forced regeneration, the fail-safe function activates and PM forced regeneration is stopped.
      
   4. Perform PM forced regeneration control until the display on the multi-information display turns off.
      
   5. If actions such as depressing the accelerator pedal or clutch pedal, etc. are performed during PM forced regeneration, PM forced regeneration stops. If PM forced regeneration stops, it is necessary to perform it again.
      
   6. PM forced regeneration control is not complete until the display on the multi-information display turns off.
      
   
   

   Result

   Result	Proceed to
   Exhaust Temperature Sensor B1S2 does not reach 500°C (932°F)*	A
   Exhaust Temperature Sensor B1S2 reaches 500°C (932°F) or higher	B

   HINT:

   If Exhaust Gas Sensor B1S2 is not 500°C or more, the exhaust fuel addition injector assembly may be blocked.