SFI SYSTEM(w/ Canister Pump Module), Diagnostic DTC:P012F62

DTC Code DTC Name
P012F62 Engine Coolant Temperature/Engine Oil Temperature Signal Compare Failure

DESCRIPTION

The engine is equipped with an engine coolant temperature sensor and an engine oil temperature sensor. The engine coolant temperature sensor and engine oil temperature sensor each have a built-in thermistor. As the temperature decreases, the thermistor resistance increases and as the temperature increases, the thermistor resistance decreases. The voltages at the respective terminals of the ECM change in accordance with the changes in the resistance of the thermistors. The ECM performs control based on these voltages.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory Note
P012F62 Engine Coolant Temperature/Engine Oil Temperature Signal Compare Failure

All of the following conditions are met (2 trip detection logic):


  1. The battery voltage is higher than 8 V.

  2. 5 hours or more have elapsed since the engine stopped on the previous trip.

  3. The engine oil temperature is -10°C (14°F) or higher.

  4. The engine coolant temperature is -10°C (14°F) or higher.

  5. The difference between the readings of the engine coolant temperature and engine oil temperature is higher than 20 °C (36 °F).

  • Engine coolant temperature sensor

  • Engine oil temperature sensor

  • ECM

 Comes on DTC stored SAE Code: P012F

MONITOR DESCRIPTION

After the engine has stopped for 5 hours or more, the ECM monitors the voltage of the engine coolant temperature sensor and engine oil temperature sensor. If the difference between the readings of the engine coolant temperature and engine oil temperature is higher than 20°C (36°F), the ECM determines that there is a malfunction in the engine coolant temperature sensor circuit or engine oil temperature sensor circuit, and stores a DTC and illuminates the MIL.

MONITOR STRATEGY

Required Sensors/Components

Engine coolant temperature sensor

Engine oil temperature sensor
Frequency of Operation Once per driving cycle

CONFIRMATION DRIVING PATTERN

B006ZO8E04
*1 Engine Switch on (IG)
*2 Engine Switch off
*3 5.5 hours or more

  1. Connect the GTS to the DLC3.

  2. Turn the engine switch on (IG) [A].

  3. Turn the GTS on.

  4. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).

  5. Turn the engine switch off.

  6. With the engine stopped, leave the vehicle as is for 5.5 hours or more [B].

  7. Turn the engine switch on (IG) [C].

  8. Turn the GTS on.

  9. Enter the following menus: Powertrain / Engine / Trouble Codes [D].

  10. Read the pending DTCs.

    Tech Tips


    • If a pending DTC is output, the system is malfunctioning.

    • If a pending DTC is not output, perform the following procedure.

  11. Enter the following menus: Powertrain / Engine / Utility / All Readiness.

  12. Input the DTC: P012F62.

  13. Check the DTC judgment result.

    GTS Display Description
    NORMAL

    • DTC judgment completed

    • System normal
    ABNORMAL

    • DTC judgment completed

    • System abnormal
    INCOMPLETE

    • DTC judgment not completed

    • Perform driving pattern after confirming DTC enabling conditions

    Tech Tips


    • If the judgment result is NORMAL, the system is normal.

    • If the judgment result is ABNORMAL, the system is malfunctioning.

    • If the judgment result is INCOMPLETE, perform steps [B] through [D] again.

CAUTION / NOTICE / HINT

Tech Tips

Read Freeze Frame Data using the GTS. 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, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

PROCEDURE


  1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P012F62)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

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

    5. Read the DTCs.


      Powertrain > Engine > Trouble Codes
      Result
      Result Proceed to
      DTC P012F62 is output A
      DTC P012F62 and other DTCs are output B

      Tech Tips

      If any DTCs other than P012F62 are output, troubleshoot those DTCs first.

    6. Record the freeze frame data.


    B

    GO TO DTC CHART Click here

    A

  2. CHECK FREEZE FRAME DATA (COOLANT TEMPERATURE AND INTAKE AIR TEMPERATURE)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Using the GTS, read the values displayed in the freeze frame data recorded in step 1.


      Powertrain > Engine
      Tester Display
      Total Distance Traveled
      Coolant Temperature
      Intake Air Temperature

      Powertrain > Engine > DTC(P012F62) > Freeze Frame Data
      Tester Display
      Total Distance Traveled
      Total Distance Traveled - Unit

      Powertrain > Engine
      Tester Display
      Total Distance Traveled

    5. Read the value displayed on the GTS.

      Standard
      GTS Display Specified Condition
      Difference between the Coolant Temperature and the Intake Air Temperature Within 15°C (27°F)

      Tech Tips


      • When the engine is cold, the value of the engine coolant temperature, engine oil temperature and intake air temperature should be approximately the same.

      • If the result is not as specified, check that there are no heat sources such as a block heater in the engine compartment.

      • Perform "Inspection After Repair" after replacing the engine coolant temperature sensor.

        Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE ENGINE COOLANT TEMPERATURE SENSOR Click here

    OK

  3. CHECK FREEZE FRAME DATA (ENGINE OIL TEMPERATURE SENSOR AND INTAKE AIR TEMPERATURE)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Using the GTS, read the values displayed in the freeze frame data recorded in step 1.


      Powertrain > Engine
      Tester Display
      Engine Oil Temperature Sensor
      Intake Air Temperature

    5. Read the value displayed on the GTS.

      Standard
      GTS Display Specified Condition
      Difference between the Engine Oil Temperature Sensor and the Intake Air Temperature Within 15°C (27°F)

      Tech Tips

      When the engine is cold, the value of the engine coolant temperature, engine oil temperature and intake air temperature should be approximately the same.

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE ECM Click here

    NG

    REPLACE ENGINE OIL TEMPERATURE SENSOR Click here