DTC    P2002    Particulate Trap Efficiency Below Threshold (Bank1)

для подготовки Нажмите здесь


DESCRIPTION

УКАЗАНИЕ:
  1. For more information on the DPNR (*1) catalytic converter and TOYOTA D-CAT (*2), refer to the following procedures (See page Нажмите здесь).
  2. If P2002 is present, refer to the DTC table for TOYOTA D-CAT (See page Нажмите здесь).
*1: Diesel Particulate-NOx Reduction system
*2: Diesel Clean Advanced Technology


A129361E01

The DPNR catalyst has an ability to reduce nitrogen oxides (NOx), particulate matter (PM), hydrocarbons (HC) and carbon monoxides (CO). The DPNR catalyst is a monolithic type catalyst. Alternating passages in the catalyst have either their inlet or outlet blocked. This forces the exhaust gasses to flow through the walls of the passages (see illustration above). The passages are coated with a NOx absorptive deduction type catalyst. Due to the flow of the exhaust gasses through micro-cavities in the passage walls, it is called a "wall flow" type converter.

DTC No.
DTC Detection Condition
Trouble Area
P2002
Condition (a), (b) or (c) is met (1-trip detection logic):
(a) Differential pressure exceeds a standard level for more than 10 seconds
(b) Exhaust gas temperature does not rise during DPNR catalyst regeneration
(c) The DPNR catalyst thermal deterioration data exceeds the threshold.
  1. DPNR catalytic converter (Manifold converter sub-assembly)
  2. Differential pressure sensor
  3. Differential pressure sensor vacuum hose is clogged
  4. Blockage in vacuum transmitting pipe sub-assembly
  5. Exhaust gas temperature sensor
  6. Fuel injector
  7. Exhaust fuel addition injector
  8. Turbocharger sub-assembly
  9. Exhaust gas leaks in TOYOTA D-CAT
  10. Mass air flow meter
  11. ECM

MONITOR DESCRIPTION

In order to detect abnormality in the DPNR (*1) catalytic converter, the ECM monitors an exhaust gas temperature as well as a differential pressure of the exhaust gas. For monitoring the differential pressure, the ECM compares the up-and downstream pressure of the DPNR catalytic converter. If the difference between the pressure is large, the ECM determines that the DPNR has become contaminated or deteriorated, and illuminates the MIL.
Furthermore, the ECM monitors an increase in the exhaust gas temperature while the exhaust fuel addition injector adds fuel under DPNR catalyst regeneration. The exhaust gas temperature during the DPNR catalyst regeneration normally rises from approximately 300°C (572°F) to approximately 600°C (1112°F) or higher. If the temperature does not rise even if a certain period of time has elapsed, the ECM interprets this as malfunction of the DPNR and illuminates the MIL.
*1: Diesel Particulate-NOx Reduction system

A091205E06


INSPECTION PROCEDURE

ПРИМЕЧАНИЕ:
  1. After replacing the ECM, the new ECM needs registration (See page Нажмите здесь) and initialization (See page Нажмите здесь).
  2. After replacing an injector, the ECM needs registration (See page Нажмите здесь).
  3. After replacing the DPNR catalyst, clear the thermal deterioration data stored in the ECM.

УКАЗАНИЕ:
  1. If a difference in pressure (DPNR Differential Pressure Sensor) does not occur as the engine speed is increased, the DPNR catalytic converter may be malfunctioning.
  2. Read freeze frame data using the intelligent tester. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, and other data from the time the malfunction occurred.

1.CHECK CATALYST RECORD OF DPNR THERMAL DETERIORATION

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch on (IG).

  1. Turn the tester on.

  1. Enter the following menu items: Powertrain / Engine and ECT / Data List / DPF Catalyst Deteriorate.

    OK:
    Normal



NG
REPLACE EXHAUST MANIFOLD CONVERTER SUB-ASSEMBLY (Нажмите здесь)
OK


2.CHECK OTHER DTC OUTPUT (IN ADDITION TO DTC 2002)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch on (IG).

  1. Turn the tester on.

  1. Enter the following menu items: Powertrain / Engine and ECT / DTC.

  1. Read the DTCs.

    Result:

    Result
    		Proceed to
    DTC P2002 is output
    		A
    DTC P2002 and other DTCs are output
    		B

    УКАЗАНИЕ:
    If any codes other than P2002 are output, perform troubleshooting for those DTCs first.



B
GO TO DTC CHART (Нажмите здесь)
A


3.CHECK BLOCKAGE OF VACUUM HOSE AND TRANSMITTING PIPE

ПРЕДОСТЕРЕЖЕНИЕ:
Be careful of being burned by exhaust gases during the following inspection.



  1. Disconnect the vacuum hose (both upstream and downstream) on the differential pressure sensor side.


    A160335E01

  1. Start the engine.

  1. Check for exhaust gas pulsations from both vacuum hoses while the engine is idling.

    OK:
    There are exhaust gas pulsations.



NG
REPLACE CLOGGED PARTS
OK


4.INSPECT FOR EXHAUST GAS LEAK

  1. Check that there is no exhaust gas leak in the exhaust system components and differential pressure sensor vacuum hoses.

    OK:
    There is no exhaust gas leakage.



NG
REPAIR OR REPLACE LEAKAGE POINT
OK


5.READ VALUE OF DIFFERENTIAL PRESSURE

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch on (IG).

  1. Turn the tester on.

  1. Start the engine.

  1. Enter the following menu items: Powertrain / Engine and ECT / Data List / Differential Pressure FB and MAF.

  1. Check the differential pressure.

    Result:

    Engine Speed (Vehicle is stop)
    		Differential Pressure (kPa)
    		Proceed to
    3000 rpm (No engine load)
    		Less than mass air flow rate x 0.31
    		A
    3000 rpm (No engine load)
    		More than mass air flow rate x 0.31
    		B


    УКАЗАНИЕ:
    1. If the differential pressure is more than a value that the intake air amount (MAF: g/sec) is multiplied by 0.31, DTC P2002 (Particulate Trap Efficiency Below Threshold [Bank 1]) will be present.
    2. The standards for the differential pressure sensor are as follows:

    Reference: 
    Condition
    		Differential Pressure Output
    		Sensor Condition
    Ignition switch on (IG)
    		Approximately 0 kPa
    		Normal
    Always
    		3 kPa
    		Open or short circuit
    3000 rpm (No engine load)
    		Negative output
    		Incorrect arrangement of hose piping



B
Перейдите к шагу 8
A


6.READ VALUE OF EXHAUST GAS TEMPERATURE

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch on (IG).

  1. Turn the tester on.

  1. Start the engine.

  1. Enter the following menu items: Powertrain / Engine and ECT / Data List / Initial Exhaust Temperature (In) and Initial Exhaust Temperature (Out).

  1. Check that exhaust gas temperature is within the specification below.

    Reference: 
    Condition
    		Exhaust Gas Temperature (°C)
    Idling after warming up engine
    		Constant at approximately 50 to 700 (122 to 1292°F) *1
    *1: There should be no noise.



NG
REPAIR OR REPLACE EXHAUST GAS TEMPERATURE SENSOR, HARNESS OR CONNECTOR
OK


7.PERFORM ACTIVE TEST BY EXHAUST FUEL ADDITION INJECTOR (ACTIVE THE DPNR REJUVENATE (PM))

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch on (IG).

  1. Turn the tester on.

  1. Drive the vehicle.

  1. Enter the following menu items: Powertrain / Engine and ECT / Active Test / Active the DPF Rejuvenate (PM).

  1. Check that exhaust gas temperature increases after switching the DPF Rejuvenate (PM) from OFF to ON.

    OK:
    The exhaust gas temperature increases by 100°C or more.



NG
REPLACE EXHAUST FUEL ADDITION INJECTOR ASSEMBLY (Нажмите здесь)
OK

REPLACE ECM (Нажмите здесь)  

8.READ VALUE OF INJECTOR (INJECTION FEEDBACK VAL AND INJECTION VOLUME)

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

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

    Standard:

    Item
    		Engine Speed*
    		Standard Range
    		Description
    Injection Feedback Val #1
    		Idling
    		-3.5 to 3.5 mm3
    		Value of injector fuel injection volume compensates for differences in combustion condition of cylinders
    1. Positive values indicate control which corrects combustion deterioration
    2. Negative values indicate control which corrects excessive combustion pressure
    3. If problems exist, "Injection Feedback Val" may deviate from the -3.5 and 3.5 mm3 range
    Injection Feedback Val #2
    		Idling
    		-3.5 to 3.5 mm3
    Injection Feedback Val #3
    		Idling
    		-3.5 to 3.5 mm3
    Injection Feedback Val #4
    		Idling
    		-3.5 to 3.5 mm3
    Injection Volume
    		Idling
    		2.8 to 7.3 mm3
    		Fuel injection volume value controlled by ECU
    1. Controls NE signal, fuel temperature, engine coolant temperature, intake air temperature, boost pressure, atmospheric pressure, and EGR volume.
    2. If problems exist, "Injection Volume" may be outside the standard range

    УКАЗАНИЕ:
    *: The air conditioner switch and all accessory switches should be OFF, and the engine should be fully warmed up.



NG
REPLACE INJECTOR ASSEMBLY (Нажмите здесь)
OK


9.CHECK EXHAUST FUEL ADDITION INJECTOR (INJECTION VOLUME)


    A094588E05

  1. Remove the exhaust fuel addition injector.

  1. Attach the exhaust fuel addition injector to a nozzle tester.

SST
09268-31012   (95336-08070)
09268-45014   (09268-41220)
09268-41150  

  1. Apply a pressure of 0.29 MPa (3.0 kgf/cm2, 42 psi) to the nozzle tester.

  1. Connect SST (wire) to the exhaust fuel addition injector.

SST
09842-30080  

  1. Inspect the injector.

    Standard:
    Condition
    		Result
    Leave the injector undisturbed for 1 minute with fuel pressurized
    		No leakage from the injector
    Apply battery voltage to the injector
    		Fuel is emitted from the injector

    УКАЗАНИЕ:
    1. Injection volume after leaving the exhaust fuel addition injector for 10 seconds with the pressurized fuel applied as follows.

      Reference:
      25 cm3 (1.5 cu.in.)

    2. The above is a reference value, thus, your reading may differ from this value depending on the measuring conditions, etc.
    3. Check that the nozzle of the exhaust fuel addition injector is not clogged.

  1. Reinstall the exhaust fuel addition injector.



NG
REPLACE EXHAUST FUEL ADDITION INJECTOR ASSEMBLY (Нажмите здесь)
OK


10.CHECK TURBOCHARGER ACTUATOR

  1. Inspect the actuator.

    OK:
    The valve has no contamination and it moves smoothly.



NG
REPLACE TURBOCHARGER SUB-ASSEMBLY (Нажмите здесь)
OK


11.READ VALUE OF MASS AIR FLOW METER

  1. Connect the intelligent tester to the DLC3.

  1. Start the engine and warm it up.

  1. Turn the tester on.

  1. Enter the following menu items: Powertrain / Engine and ECT / Data List.

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

    1. MAF

    Standard:

    Item
    		Engine Speed *1
    		Standard Range
    		Description
    MAF *2, *3
    		Ignition switch on (IG) (engine stopped)
    		Less than 0.55g/sec.
    		Intake air volume detected by mass air flow meter
    Idling
    		2.5 to 5.52 g/sec.
    3000 rpm (no engine load)
    		49 to 60 g/sec.
    3000 rpm (driving with full throttle acceleration) *4
    		124 to 136 g/sec.

    УКАЗАНИЕ:
    *1: The air conditioner switch and all accessory switches should be OFF with a fully warmed-up 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 3000 to 4000 rpm with full throttle acceleration.
    *4: Fully depress the accelerator pedal with the vehicle creeping at idle speed in 2nd gear.



NG
REPLACE MASS AIR FLOW METER (Нажмите здесь)
OK

REPLACE EXHAUST MANIFOLD CONVERTER SUB-ASSEMBLY (Нажмите здесь)  

































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