ECD 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.

P242C
DTC Detection Drive Pattern DTC Detection Condition Trouble Area
Idle the engine for 3 seconds after warming up the engine (the engine coolant temperature is 70°C (158°F) or higher), No. 2 exhaust gas temperature sensor is continuously 120°C (248°F) or more for 15 seconds and allowing 11 minutes to elapse after starting the engine.

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 more

  • 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
P242D
DTC Detection Drive Pattern DTC Detection Condition Trouble Area
Idle the engine for 3 seconds after warming up the engine (the engine coolant temperature is 70°C (158°F) or higher), No. 2 exhaust gas temperature sensor is continuously 120°C (248°F) or more for 15 seconds and allowing 11 minutes to elapse after starting the engine.

No. 3 exhaust gas temperature sensor (B1S3) 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 more

  • 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

  • Abnormal rise in temperature due to melting of DPF catalytic converter

  • ECM
Related Data List
DTC No. Data List

P242C

P242D

 Exhaust Temperature B1S3

Tech Tips


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

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

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

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

WIRING DIAGRAM

Refer to DTC P0545 Click here.

CAUTION / NOTICE / HINT

Note

After replacing the ECM, the new ECM needs registration (See page ) 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 No. 3 exhaust gas temperature sensor circuit is not malfunctioning, check if the DPF catalytic converter has melted as DTC P242D may be stored when the DPF catalytic converter melts and the No. 3 exhaust gas temperature sensor is exposed to high temperatures.

PROCEDURE


  1. READ VALUE USING GTS (EXHAUST TEMPERATURE B1S3)


    1. Connect the GTS to the DLC3.

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

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

    4. Read the value.

      Standard
      Same as the actual exhaust gas temperature (50 to 700°C [122 to 1292°F] during idling after warm-up), 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) or higher B
      OK: Same as the actual exhaust gas temperature (50 to 700°C [122 to 1292°F] during idling after warm-up), 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) or higher.


    B

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

    C

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here

    A

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


    1. B001HMHE01
      Text in Illustration
      *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 No. 3 exhaust gas temperature sensor wire harness side connector.

    3. Connect the GTS to the DLC3.

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

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

    6. Read the value.

      Standard
      1000°C (1832°F) or higher

    7. Reconnect the No. 3 exhaust gas temperature sensor connector.


    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.


    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED 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
      C167-2 (THCO) - C149-33 (THCO) Always Below 1 Ω
      C167-1 (E2) - C149-26 (ETCO) Always Below 1 Ω

    4. Reconnect the No. 3 exhaust gas temperature sensor connector.

    5. Reconnect the ECM connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR Click here

    OK

  5. REPLACE ECM


    1. Replace the ECM Click here.


    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here

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


    1. B001FIZE23

      Disconnect the No. 3 exhaust gas temperature sensor connector.

    2. Connect the GTS to the DLC3.

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

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

    5. Read the value.

      Standard
      0°C (32°F)
      Text in Illustration
      *1 No. 3 Exhaust Gas Temperature Sensor
      *2 ECM

    6. Reconnect the No. 3 exhaust gas temperature sensor connector.


    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.


    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED 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
      C167-2 (THCO) or C149-33 (THCO) - Body ground and other terminals Always 10 kΩ or higher

    4. Reconnect the No. 3 exhaust gas temperature sensor connector.

    5. Reconnect the ECM connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR Click here

    OK

  9. REPLACE ECM


    1. Replace the ECM Click here.


    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here

  10. REPAIR OR REPLACE HARNESS OR CONNECTOR


    1. Repair or replace the harness or connector.


    NEXT

  11. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED


    1. Connect the GTS to the DLC3.

    2. Clear the DTCs Click here.

    3. Start the engine.

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

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

    6. Confirm that the DTC is not output again.


    NEXT

    END