ECD SYSTEM (w/ EGR Cooler), Diagnostic DTC:P0180, P0182, P0183

DTC Code DTC Name
P0180 Fuel Temperature Sensor Circuit Malfunction
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 in the thermistor increases. When the temperature is high, the resistance decreases. The variations in resistance are communicated to the ECM as changes in voltage (see Fig. 1).

A01DZUUE05

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.

The resistor R and fuel temperature sensor are connected in series. When the resistance value of the fuel temperature sensor changes in accordance with changes in the fuel temperature, the voltage at terminal THF also changes. Based on this signal, the ECM corrects the pressure control compensation of the supply pump and errors.

DTC No. DTC Detection Condition Trouble Area
P0180

Open or short in 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

Short in fuel temperature sensor circuit for 0.5 seconds

(1 trip detection logic)

  • Open or short in fuel temperature sensor circuit

  • Fuel temperature sensor

  • ECM
P0183

Open in fuel temperature sensor circuit for 0.5 seconds

(1 trip detection logic)

  • Open or short in fuel temperature sensor circuit

  • Fuel temperature sensor

  • ECM

Tech Tips

When DTC P0180/39, P0182/39 and/or P0183/39 is detected, check the fuel temperature by entering the following menus on the intelligent tester: Powertrain / Engine / Data List / Fuel Temperature.

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

WIRING DIAGRAM

A01DVMIE09

INSPECTION PROCEDURE

Note

If the ECM is replaced, the new ECM needs registration Click here and initialization Click here.

Tech Tips


  • If DTCs related to different systems that have terminal E2 as the ground terminal are output simultaneously, terminal E2 may have an open circuit.

  • Read freeze frame data using the intelligent tester. Freeze frame data records the engine conditions when a malfunction is detected. When troubleshooting, freeze frame data can help determine if the vehicle was running or stopped, if the engine was warmed up or not, and other data from the time the malfunction occurred.

PROCEDURE


  1. READ VALUE USING INTELLIGENT TESTER (FUEL TEMP)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch ON and turn the tester ON.

    3. Enter the following menus: Powertrain / Engine / Data List / Fuel Temp.

    4. Read the value displayed on the intelligent tester.

      Temperature
      Same value as the actual fuel temperature.
      Result
      Temperature Displayed Proceed to
      -40°C (-40°F) A
      140°C (284°F) or more B
      OK (Same as actual fuel temperature) C

      Tech Tips


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

      • If there is a short circuit, the intelligent tester indicates 140°C (284°F) or more.


    B

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

    C

    CHECK FOR INTERMITTENT PROBLEMS

    A

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


    1. A01E12ZE08

      Disconnect the F11 fuel temperature sensor connector.

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

    3. Connect the intelligent tester to the DLC3.

    4. Turn the ignition switch ON and turn the tester ON.

    5. Enter the following menus: Powertrain / Engine / Data List / Fuel Temp.

    6. Read the value.

      Standard
      140°C (284°F) or more

    OK

    CONFIRM GOOD CONNECTION AT SENSOR. IF OK, REPLACE FUEL TEMPERATURE SENSOR

    NG

  3. READ VALUE USING INTELLIGENT TESTER (CHECK FOR OPEN IN ECM)


    1. A01DWEXE39

      Disconnect the E8 ECM connector.

    2. Disconnect the F11 fuel temperature sensor connector.

    3. Connect terminals THF and E2 of the E8 ECM connector.

      Tech Tips

      Before checking, do a visual and contact pressure check on the ECM connector.

    4. Connect the intelligent tester to the DLC3.

    5. Turn the ignition switch ON and turn the tester ON.

    6. Read the value displayed.

      Standard
      140°C (284°F) or more

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    NG

    CONFIRM GOOD CONNECTION AT ECM. IF OK, REPLACE ECM

  4. READ VALUE USING INTELLIGENT TESTER (CHECK FOR SHORT IN WIRE HARNESS)


    1. A01E1WWE42

      Disconnect the F11 fuel temperature sensor connector.

    2. Connect the intelligent tester to the DLC3.

    3. Turn the ignition switch ON and turn the intelligent tester ON.

    4. Enter the following menus: Powertrain / Engine / Data List / Fuel Temp.

    5. Read the value.

      Standard
      -40°C (-40°F)

    OK

    CONFIRM GOOD CONNECTION AT SENSOR. IF OK, REPLACE FUEL TEMPERATURE SENSOR

    NG

  5. REPAIR OR REPLACE INTELLIGENT TESTER (CHECK FOR SHORT IN ECM)


    1. A01DV96E11

      Disconnect the F11 fuel temperature sensor connector.

    2. Disconnect the E8 ECM connector.

    3. Connect the intelligent tester to the DLC3.

    4. Turn the ignition switch ON and turn the tester ON.

    5. Enter the following menus: Powertrain / Engine / Data List / Fuel Temp.

    6. Read the value.

      Standard
      -40°C (-40°F)

    OK

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    NG

    REPLACE ECM Click here