SFI SYSTEM(w/o Canister Pump Module), Diagnostic DTC:P01E311

DTC Code DTC Name
P01E311 Engine Coolant Temperature Sensor 3 Circuit Short to Ground

DESCRIPTION

Tech Tips

When this DTC is stored, the ECM enters fail-safe mode. In fail-safe mode the ECM opens the flow shutting valve, operates the engine water pump assembly at the highest duty cycle and restricts the engine output. Fail-safe mode continues until the power switch is turned off.

No. 2 engine coolant temperature sensor is installed on the inlet side of the heater core. The state of the flow shutting valve (water valve) is monitored by comparing the difference in temperatures detected by the No. 2 engine coolant temperature sensor and engine coolant temperature sensor.

The No. 2 engine coolant temperature sensor has a built-in thermistor with a resistance that varies according to the engine coolant temperature. The No. 2 engine coolant temperature sensor is connected to the ECM in the same way as the engine coolant temperature sensor.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory Note
P01E311 Engine Coolant Temperature Sensor 3 Circuit Short to Ground The No. 2 engine coolant temperature sensor output voltage is less than 0.142 V for 3 seconds or more (1 trip detection logic).

  • Short in No. 2 engine coolant temperature sensor circuit

  • No. 2 engine coolant temperature sensor

  • ECM

 Does not come on DTC stored SAE Code: P01E5

Tech Tips

When this DTC is output, check the No. 2 engine coolant temperature in the Data List. Enter the following menus: Powertrain / Engine / Data List / Heater Coolant Temperature Sensor.

DTC No. Heater Coolant Temperature Sensor Malfunction
P01E311 Higher than 135°C (275°F) Short to ground in THHW circuit

If the Data List value is normal it may be due to a temporary recovery from the malfunction condition. Check for intermittent problems.

MONITOR DESCRIPTION

The ECM calculates the engine coolant temperature on the inlet side of the heater core based on the output voltage of the No. 2 engine coolant temperature sensor. If the output voltage of the No. 2 engine coolant temperature sensor is not within the normal operating range, the ECM will store a DTC. In this case, the No. 2 engine coolant temperature sensor may be malfunctioning or there may be an open or short in the sensor circuit.

Example:

When the output voltage of the No. 2 engine coolant temperature sensor is less than 0.142 V for 3 seconds or more, the ECM stores this DTC.

MONITOR STRATEGY

Frequency of Operation Continuous

CONFIRMATION DRIVING PATTERN


  1. Connect the GTS to the DLC3.

  2. Turn the power switch on (IG).

  3. Turn the GTS on.

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

  5. Turn the power switch off and wait for at least 30 seconds.

  6. Turn the power switch on (IG).

  7. Wait 5 seconds or more.

  8. Turn the GTS on.

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

  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: P01E311.

  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
    N/A

    • Unable to perform DTC judgment

    • Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit

    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 or N/A, perform the Confirmation Driving Pattern and check the DTC judgment result again.

WIRING DIAGRAM

B006ID3E67

CAUTION / NOTICE / HINT

Note


  • Vehicle Control History may be stored in the hybrid vehicle control ECU if the engine is malfunctioning. Certain vehicle condition information is recorded when Vehicle Control History is stored. Reading the vehicle conditions recorded in both the freeze frame data and Vehicle Control History can be useful for troubleshooting.

    Click here

    (Select Powertrain in Health Check and then check the time stamp data.)

    Click here

  • If any "Engine Malfunction" Vehicle Control History item has been stored in the hybrid vehicle control ECU, make sure to clear it. However, as all Vehicle Control History items are cleared simultaneously, if any Vehicle Control History items other than "Engine Malfunction" are stored, make sure to perform any troubleshooting for them before clearing Vehicle Control History.

    Click here

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

    B006I2TC46
    *1 No. 2 Engine Coolant Temperature Sensor
    *2 ECM

    1. Disconnect the No. 2 engine coolant temperature sensor connector.

    2. Connect the GTS to the DLC3.

    3. Turn the power switch on (IG).

    4. Turn the GTS on.

    5. Enter the following menus: Powertrain / Engine / Data List / Heater Coolant Temperature Sensor.


      Powertrain > Engine > Data List
      Tester Display
      Heater Coolant Temperature Sensor

    6. Read the value displayed on the GTS.

      OK
      -40°C (-40°F)
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE NO. 2 ENGINE COOLANT TEMPERATURE SENSOR Click here

    NG

  2. CHECK HARNESS AND CONNECTOR (NO. 2 ENGINE COOLANT TEMPERATURE SENSOR - ECM)


    1. Disconnect the No. 2 engine coolant 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
      C7-2 (TW) or C31-129 (THHW) - Body ground and other terminals Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE ECM Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR