ECD SYSTEM, Diagnostic DTC:P2002

DTC Code DTC Name
P2002 Diesel Particulate Filter Efficiency Below Threshold Bank 1

DESCRIPTION

Tip:

For more information on the diesel particulate filter (DPF) catalyst regeneration control, refer to System Description.

Click here

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

P2002

Diesel Particulate Filter Efficiency Below Threshold Bank 1

The fault is detected when the quotient of the integrated differential pressure and the integrated threshold value falls below a limit value.

(3 trip detection logic)

  • Differential pressure sensor

  • Open or short in differential pressure sensor circuit

  • Exhaust manifold converter sub-assembly (DPF catalytic converter)

  • Air hose

  • ECM

Comes on

DTC stored
Table 1. Related Data List

DTC No.

Data List

P2002

Adaptation Value of Differential Pressure at Particle Filter

CAUTION / NOTICE / HINT

Note:

  • When replacing the ECM, the ECM needs registration and initialization.

    Click here

  • After replacing the DPF catalyst, the ECM needs initialization.

    Click here

  • After replacing the differential pressure sensor, the ECM needs initialization.

    Click here

Tip:

  • When the ECM must be replaced, before replacing the ECM, perform the "Learning Values Save" function using the GTS. Then after installing the new ECM, perform all of the initialization/registrations for the "Learning Values Write" function by following the instructions shown on the GTS display.

  • Read freeze frame data using the GTS. Freeze frame data records the engine condition when malfunctions are detected. 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.

PROCEDURE

  1. CHECK HARNESS AND CONNECTOR (DIFFERENTIAL PRESSURE SENSOR - ECM)

    1. Disconnect the differential pressure sensor connector.

    2. Disconnect the ECM connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      B127-1 (VC) - B112-70 (VCPX)

      Always

      Below 1 Ω

      B127-2 (PEX) - B112-85 (PEX)

      Always

      Below 1 Ω

      B127-3 (E2) - B112-71 (EPEX)

      Always

      Below 1 Ω

      B127-1 (VC) or B112-70 (VCPX) - Body ground

      Always

      10 kΩ or higher

      B127-2 (PEX) or B112-85 (PEX) - Body ground

      Always

      10 kΩ or higher

      B127-3 (E2) or B112-71 (EPEX) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTORClick here

    OK

  2. CHECK HARNESS AND CONNECTOR (VC VOLTAGE)

    A351158C26

    *a

    Front view of wire harness connector

    (to Differential Pressure Sensor)

    1. Disconnect the differential pressure sensor connector.

    2. Turn the ignition switch to ON.

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

      Standard Voltage

      Tester Connection

      Switch Condition

      Specified Condition

      B127-1 (VC) - B127-3 (E2)

      Ignition switch ON

      4.5 to 5.5 V

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE ECMClick here

    OK

  3. CHECK DIFFERENTIAL PRESSURE SENSOR AIR HOSE CONNECTION

    1. Check hose pipes between exhaust system and differential pressure sensor. (for correct installation, arrangement (kinks), permeability (coking possible) and cracks).

      OK

      Part is securely installed.

    Result

    Proceed to

    OK

    NG
    NG

    CONNECT AIR HOSEClick here

    OK

  4. CHECK EXHAUST MANIFOLD CONVERTER SUB-ASSEMBLY (DPF CATALYTIC CONVERTER)

    1. Check that the DPF catalytic converter is installed.

      OK

      DPF catalytic converter is installed.

      Tip:

      If the DPF catalytic converter is not installed, the exhaust tailpipe turns black from soot.

    2. Check that the DPF catalytic converter is not damaged.

      OK

      DPF catalytic converter is not damaged.

      Tip:

      If the DPF catalytic converter is not installed, the exhaust tailpipe turns black from soot.

      • If the DPF catalytic converter is damaged, the exhaust tailpipe and edge of the filter turn black from soot.

      • Disconnect the front exhaust pipe assembly from the exhaust manifold converter sub-assembly (DPF catalytic converter) and check for soot stuck inside the exhaust manifold converter sub-assembly (DPF catalytic converter).

    Result

    Proceed to

    OK

    NG
    NG

    INSTALL OR REPLACE EXHAUST MANIFOLD CONVERTER SUB-ASSEMBLY (DPF CATALYTIC CONVERTER)Click here

    OK

  5. REPLACE DIFFERENTIAL PRESSURE SENSOR

    1. Replace the differential pressure sensor.

      Click here

    2. Perform the differential pressure learning value reset.

      Click here

    Result

    Proceed to

    NEXT
    NEXT

  6. CHECK WHETHER DTC OUTPUT RECURS (DTC P2002)

    1. Connect the GTS to the DLC3.

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

    3. Clear the DTCs.

      Powertrain > Engine and ECT > Clear DTCs

    4. Turn the ignition switch off and wait for 60 seconds or more [A].

    5. Perform road test [B].

    6. Repeat [A] and [B] for the number of trips detected.

    7. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

      Powertrain > Engine and ECT > Trouble Codes

    8. Read the DTCs.

      Result

      Result

      Result

      Proceed to

      No DTC output

      No DTC output

      A

      DTC P2002

      DTC P2002

      B
    A

    END

    B

    REPLACE ECMClick here

  7. INSTALL OR REPLACE EXHAUST MANIFOLD CONVERTER SUB-ASSEMBLY (DPF CATALYTIC CONVERTER)

    1. Install or replace the exhaust manifold converter sub-assembly (DPF catalytic converter).

      Click here

    2. Perform DPF history information reset and NOx storage catalyst learning value reset.

      Click here

    Result

    Proceed to

    NEXT
    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIREDClick here

  8. CONNECT AIR HOSE

    1. Install the air hose.

    Result

    Proceed to

    NEXT
    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIREDClick here

  9. REPLACE ECM

    1. Replace the ECM.

      Click here

    Result

    Proceed to

    NEXT
    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIREDClick here

  10. REPAIR OR REPLACE HARNESS OR CONNECTOR

    1. Repair or replace the harness or connector.

    Result

    Proceed to

    NEXT
    NEXT

  11. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

    1. Connect the GTS to the DLC3.

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

    3. Clear the DTCs.

      Powertrain > Engine and ECT > Clear DTCs

    4. Turn the ignition switch off and wait for 60 seconds or more [A].

    5. Perform road test [B].

    6. Repeat [A] and [B] for the number of trips detected.

    7. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

      Powertrain > Engine and ECT > Trouble Codes

    8. Confirm that the DTC is not output again.

    Result

    Proceed to

    NEXT
    NEXT

    END