ECD SYSTEM, Diagnostic DTC:P0180, P0182, P0183

DTC Code DTC Name
P0180 Fuel Temperature Sensor "A" Circuit
P0182 Fuel Temperature Sensor "A" Circuit Low Input
P0183 Fuel Temperature Sensor "A" Circuit High Input

DESCRIPTION

The fuel temperature sensor monitors the fuel temperature. The fuel temperature sensor has a thermistor that varies its resistance depending on the fuel temperature. When the fuel temperature is low, the resistance of the thermistor is high. When the temperature is high, the resistance is low. The variations of resistance are communicated to the ECM as changes of voltage (See Fig. 1).

The fuel temperature sensor is connected to the ECM. The 5 V power source voltage in the ECM is applied to the fuel temperature sensor from terminal THF via resistor R.

Resistor R and the fuel temperature sensor are connected in series. When the resistance value of the fuel temperature sensor changes due to a change in fuel temperature, the voltage at terminal THF also changes. Based on this signal, the ECM corrects the pressure control compensation of the fuel supply pump assembly.

B007P16E01
P0180
DTC Detection Drive Pattern DTC Detection Condition Trouble Area
Ignition switch to ON for 0.5 seconds Open or short in the fuel temperature sensor circuit for 0.5 seconds (1 trip detection logic).

  • Open or short in fuel temperature sensor circuit

  • Fuel temperature sensor

  • ECM
P0182
DTC Detection Drive Pattern DTC Detection Condition Trouble Area
Ignition switch to ON for 0.5 seconds Short in the fuel temperature sensor circuit for 0.5 seconds (1 trip detection logic).

  • Short in fuel temperature sensor circuit

  • Fuel temperature sensor

  • ECM
P0183
DTC Detection Drive Pattern DTC Detection Condition Trouble Area
Ignition switch to ON for 0.5 seconds Open in the fuel temperature sensor circuit for 0.5 seconds (1 trip detection logic).

  • Open in fuel temperature sensor circuit

  • Fuel temperature sensor

  • ECM
Related Data List
DTC No. Data List
P0180 Fuel Temperature
P0182
P0183

Tech Tips


  • If DTC P0180, P0182 and/or P0183 is stored, the following symptoms may appear:


    • Misfire

    • Combustion noise

    • Black smoke

    • Lack of power

  • When DTC P0180, P0182 and/or P0183 is stored, check the intake air temperature by entering the following menus: Powertrain / Engine and ECT / Data List / Fuel Temperature.

    Reference
    Temperature Displayed Malfunction
    -40°C (-40°F) Open circuit
    140°C (284°F) or higher Short circuit

WIRING DIAGRAM

B007UXRE02

INSPECTION PROCEDURE

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.

PROCEDURE


  1. READ VALUE USING GTS (FUEL 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 and ECT / Data List / Fuel Temperature.

    4. Read the value.

      OK
      Same as the actual fuel temperature
      Result
      Result Proceed to
      -40°C (-40°F) A
      140°C (284°F) or higher B
      OK (Same as actual fuel temperature) C

      Tech Tips


      • If there is an open circuit, the GTS indicates -40°C (-40°F).

      • If there is a short circuit, the GTS indicates 140°C (284°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. B007V8WE35
      Text in Illustration
      *1 Fuel Temperature Sensor
      *2 ECM
      *a

      Front view of wire harness connector

      (to Fuel Temperature Sensor)

      Disconnect the fuel temperature sensor connector.

    2. Connect terminals 2 and 1 of the fuel temperature sensor connector.

    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 and ECT / Data List / Fuel Temperature.

    6. Read the value.

      OK
      140°C (284°F) or higher

    7. Reconnect the fuel temperature sensor connector.


    NG

    CHECK HARNESS AND CONNECTOR (FUEL TEMPERATURE SENSOR - ECM) Click here

    OK

  3. REPLACE FUEL TEMPERATURE SENSOR


    1. Replace the fuel temperature sensor Click here.


    NEXT

    BLEED AIR FROM FUEL SYSTEM Click here

  4. CHECK HARNESS AND CONNECTOR (FUEL TEMPERATURE SENSOR - ECM)


    1. Disconnect the fuel 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
      D46-2 - D105-112 (THF) Always Below 1 Ω
      D46-1 - D105-89 (ETHF) Always Below 1 Ω

    4. Reconnect the fuel temperature sensor connector.

    5. Reconnect the ECM connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR Click here

    OK

  5. CONFIRM GOOD CONNECTION TO ECM. IF OK, 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. B007R77E07
      Text in Illustration
      *1 Fuel Temperature Sensor
      *2 ECM

      Disconnect the fuel 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 and ECT / Data List / Fuel Temperature.

    5. Read the value.

      OK
      -40°C (-40°F)

    6. Reconnect the fuel temperature sensor connector.


    NG

    CHECK HARNESS AND CONNECTOR (FUEL TEMPERATURE SENSOR - ECM) Click here

    OK

  7. REPLACE FUEL TEMPERATURE SENSOR


    1. Replace the fuel temperature sensor Click here.


    NEXT

    BLEED AIR FROM FUEL SYSTEM Click here

  8. CHECK HARNESS AND CONNECTOR (FUEL TEMPERATURE SENSOR - ECM)


    1. Disconnect the fuel 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
      D46-2 or D105-112 (THF) - Body ground Always 10 kΩ or higher

    4. Reconnect the fuel 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. BLEED AIR FROM FUEL SYSTEM


    1. Bleed the air from the fuel system Click here.


    NEXT

  11. PERFORM FUEL SUPPLY PUMP INITIALIZATION


    1. Perform fuel supply pump initialization Click here.


    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here

  12. REPAIR OR REPLACE HARNESS OR CONNECTOR


    1. Repair or replace the harness or connector.


    NEXT

  13. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED


    1. Connect the GTS to the DLC3.

    2. Clear the DTCs Click here.

    3. Turn the ignition switch to ON for 1 second or more.

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

    5. Confirm that the DTC is not output again.


    NEXT

    END