ECD SYSTEM(w/ Urea SCR System), Diagnostic DTC:P242C, P242D

DTC Code DTC Name
P242C Exhaust Gas Temperature Sensor Circuit Low Bank 1 Sensor 3
P242D Exhaust Gas Temperature Sensor Circuit High Bank 1 Sensor 3

DESCRIPTION

Refer to DTC P0545.

Click here

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory
P242C Exhaust Gas Temperature Sensor Circuit Low Bank 1 Sensor 3

No. 3 exhaust gas temperature sensor output voltage is below 0.2 V for 3 seconds or more when all conditions are met (1 trip detection logic):


  • After starting the engine, 11 minutes or more elapses.

  • Coolant temperature is 70°C (158°F) or higher.

  • The No. 2 exhaust gas temperature sensor is continuously 120°C (248°F) or more for 15 seconds.

  • Open or short in No. 3 exhaust gas temperature sensor circuit

  • No. 3 exhaust gas temperature sensor

  • ECM

 Comes on DTC stored
P242D Exhaust Gas Temperature Sensor Circuit High Bank 1 Sensor 3

No. 3 exhaust gas temperature sensor output voltage is higher than 4.95 V for 3 seconds or more when all conditions are met (1 trip detection logic):


  • After starting the engine, 11 minutes or more elapses.

  • Coolant temperature is 70°C (158°F) or higher.

  • The No. 2 exhaust gas temperature sensor is continuously 120°C (248°F) or more for 15 seconds.

  • Open or short in No. 3 exhaust gas temperature sensor circuit

  • No. 3 exhaust gas temperature sensor

  • ECM

 Comes on DTC stored
Related Data List
DTC No. Data List

P242C

P242D

 Exhaust Temperature B1S3

Tech Tips


  • DTC P20CF (Exhaust fuel addition injector assembly malfunction) may be stored if there is an open malfunction in an exhaust gas temperature sensor circuit.

  • When DTC P242C and P242D is output, check the downstream exhaust gas temperature indicated by "Powertrain / Engine / Data List / Diesel Exhaust / Exhaust Temperature B1S3" using the GTS.

Reference:
Condition Exhaust Temperature B1S3 No. 3 Exhaust Gas Temperature Sensor Condition
Idling with warm engine Constant at between 50 and 700°C (122 and 1292°F) Normal
0°C (32°F) Open circuit
1000°C (1832°F) Short circuit

MONITOR DESCRIPTION

The ECM constantly monitors the output voltages from the No. 3 exhaust gas temperature sensors in order to detect problems with the sensors. When the sensor output voltage deviates from the normal operating range (between 0.2 V and 4.95 V) for more than 3 seconds after the engine is warmed up, the ECM interprets this as malfunction of the sensor circuit and illuminates the MIL.

CONFIRMATION DRIVING PATTERN

DTC No. DTC Detection Drive Pattern

P242C

P242D

 Idle the engine for 3 seconds or more after warming up the engine (the engine coolant temperature is 70°C (158°F) or higher), allowing 11 minutes to elapse after starting the engine and waiting for the No. 2 exhaust gas temperature sensor to be 120°C (248°F) or more for 15 seconds.

WIRING DIAGRAM

Refer to DTC P0545.

Click here

CAUTION / NOTICE / HINT

Note

After replacing the ECM, the new ECM needs registration (Click here ) and initialization Click here.

Tech Tips


  • 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.

  • If DTC P242D is stored and the exhaust gas temperature sensor circuit is not malfunctioning, check if the exhaust manifold converter sub-assembly has melted as DTC P242D may be stored when the exhaust manifold converter sub-assembly melts and the exhaust gas temperature sensor is exposed to high temperatures.

  • Sensor 3 represents the sensor located upstream of the DPF catalytic converter.

PROCEDURE


  1. READ VALUE USING GTS (NO. 3 EXHAUST TEMPERATURE)


    1. Connect the GTS to the DLC3.

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

    3. Enter the following menus: Powertrain / Engine / Data List / Diesel Exhaust / Exhaust Temperature B1S3.

    4. Read the value.


      Powertrain > Engine > Data List
      Tester Display
      Exhaust Temperature B1S3
      Standard
      Same as the actual No. 3 exhaust gas temperature (50 to 700°C [122 to 1292°F] during idling with warm engine), and varies after an engine speed of 3000 rpm is maintained for 1 minute.
      Result
      Temperature Displayed Proceed to
      0°C (32°F) (After warming up the engine) A
      1000°C (1832°F) B
      OK: Same as the actual exhaust gas temperature (50 to 700°C [122 to 1292°F] during idling after warmup), and varies after maintaining an engine speed of 3000 rpm for 1 minute after accelerating the engine from idling to 3000 rpm C

      Tech Tips


      • If there is a short circuit, the GTS will indicate 0°C (32°F).

      • If there is an open circuit, the GTS will indicate 1000°C (1832°F).


    B

    READ VALUE USING GTS (CHECK FOR SHORT IN WIRE HARNESS) Click here

    C

    GO TO STEP 11 Click here

    A

  2. READ VALUE USING GTS (CHECK FOR OPEN IN WIRE HARNESS)


    1. B0028MYC06
      *1 No. 3 Exhaust Gas Temperature Sensor
      *2 ECM
      *a

      Front view of wire harness connector

      (to No. 3 Exhaust Gas Temperature Sensor)

      Disconnect the No. 3 exhaust gas temperature sensor connector.

    2. Connect terminals 1 (E2) and 2 (THCO) of the exhaust gas temperature sensor connector on the wire harness side.

    3. Connect the GTS to the DLC3.

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

    5. Enter the following menus: Powertrain / Engine / Data List / Diesel Exhaust / Exhaust Temperature B1S3.


      Powertrain > Engine > Data List
      Tester Display
      Exhaust Temperature B1S3

    6. Read the value.

      Standard
      1000°C (1832°F)
      Result
      Proceed to
      OK
      NG

    NG

    CHECK HARNESS AND CONNECTOR (NO. 3 EXHAUST GAS TEMPERATURE SENSOR - ECM) Click here

    OK

  3. REPLACE NO. 3 EXHAUST GAS TEMPERATURE SENSOR


    1. Replace the No. 3 exhaust gas temperature sensor.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

    GO TO STEP 11 Click here

  4. CHECK HARNESS AND CONNECTOR (NO. 3 EXHAUST GAS TEMPERATURE SENSOR - ECM)


    1. Disconnect the No. 3 exhaust gas temperature 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
      C114-2 (THCO) - C57-33 (THCO) Always Below 1 Ω
      C114-1 (E2) - C57-26 (ETCO) Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    GO TO STEP 10 Click here

    OK

  5. REPLACE ECM


    1. Replace the ECM.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

    GO TO STEP 11 Click here

  6. READ VALUE USING GTS (CHECK FOR SHORT IN WIRE HARNESS)


    1. B0024NGC05
      *1 No. 3 Exhaust Gas Temperature Sensor
      *2 ECM

      Disconnect the No. 3 exhaust gas temperature sensor connector.

    2. Connect the GTS to the DLC3.

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

    4. Enter the following menus: Powertrain / Engine / Data List / Diesel Exhaust / Exhaust Temperature B1S3.

    5. Read the value.


      Powertrain > Engine > Data List
      Tester Display
      Exhaust Temperature B1S3
      Standard
      0°C (32°F)
      Result
      Proceed to
      OK
      NG

    NG

    CHECK HARNESS AND CONNECTOR (NO. 3 EXHAUST GAS TEMPERATURE SENSOR - ECM) Click here

    OK

  7. REPLACE NO. 3 EXHAUST GAS TEMPERATURE SENSOR


    1. Replace the No. 3 exhaust gas temperature sensor.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

    GO TO STEP 11 Click here

  8. CHECK HARNESS AND CONNECTOR (NO. 3 EXHAUST GAS TEMPERATURE SENSOR - ECM)


    1. Disconnect the No. 3 exhaust gas temperature 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
      C114-2 (THCO) or C57-33 (THCO) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR Click here

    OK

  9. REPLACE ECM


    1. Replace the ECM.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

    GO TO STEP 11 Click 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.

    3. Turn the GTS on.

    4. Clear the DTCs.


      Powertrain > Engine > Clear DTCs

    5. Turn the ignition switch off for 30 seconds or more.

    6. Start the engine and turn the GTS on.

    7. Idle the engine for 3 seconds or more after warming up the engine (the engine coolant temperature is 70°C (158°F) or higher), allowing 11 minutes to elapse after starting the engine and waiting for the No. 2 exhaust gas temperature sensor to be 120°C (248°F) or more for 15 seconds.

    8. Enter the following menus: Powertrain / Engine / Trouble Codes.

    9. Confirm that the DTC is not output.


      Powertrain > Engine > Trouble Codes
      Result
      Proceed to
      NEXT

    NEXT

    END