ECD SYSTEM (w/o DPF), 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.

The resistor R and fuel temperature sensor are connected in series. When the resistance value of the fuel temperature sensor changes due to a change of 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 determines errors.

A01BBBAE03
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

(sensor resistance value less than 79 Ω)

(1 trip detection logic)

  • Short in fuel temperature sensor circuit

  • Fuel temperature sensor

  • ECM
P0183

Open in fuel temperature sensor circuit for 0.5 seconds

(sensor resistance value more than 156 kΩ)

(1 trip detection logic)

  • Open in fuel temperature sensor circuit

  • Fuel temperature sensor

  • ECM

Tech Tips

When DTC P0180, P0182 and/or P0183 is set, check the fuel temperature by selecting the following menu items on an intelligent tester: Powertrain / Engine and ECT / Data List / Fuel Temperature.

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

WIRING DIAGRAM

A01BB39E11

INSPECTION PROCEDURE

Note

After replacing the ECM, the new ECM needs registration Click here and initialization Click here.

Tech Tips


  • If different 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 an intelligent tester. Freeze frame data record 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, if the air-fuel ratio was lean or rich, and other data, from the time the malfunction occurred.

PROCEDURE


  1. READ VALUE USING INTELLIGENT TESTER (FUEL TEMP)


    1. Connect an intelligent tester to the DLC3.

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

    3. Select the following menu items: Powertrain / Engine / Data List / Fuel Temperature.

    4. Read the value.

      Temperature
      Same value as the actual fuel temperature.
      Result
      Temperature Displayed Proceed To
      -40°C (-40°F) A
      140°C (284°F) 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).


    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. A01BBDGE09

      Disconnect the D46 fuel temperature sensor connector.

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

    3. Connect an intelligent tester to the DLC3.

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

    5. Select the following menu items: Powertrain / Engine / Data List / Fuel Temperature.

    6. Read the value.

      Standard
      140°C (284°F)

    7. Reconnect the fuel temperature sensor connector.


    OK

    REPLACE FUEL TEMPERATURE SENSOR

    NG

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


    1. A01BAXIE42

      Disconnect the D46 fuel temperature sensor connector.

    2. Connect terminals THF and E2 of the D1 ECM connector.

      Tech Tips

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

    3. Connect an intelligent tester to the DLC3.

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

    5. Select the following menu items: Powertrain / Engine / Data List / Fuel Temperature.

    6. Read the value displayed.

      Standard
      140°C (284°F)

    7. Reconnect the fuel temperature sensor connector.


    OK

    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. A01BCZFE42

      Disconnect the D46 fuel temperature sensor connector.

    2. Connect an intelligent tester to the DLC3.

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

    4. Select the following menu items: Powertrain / Engine / Data List / Fuel Temperature.

    5. Read the value.

      Standard
      -40°C (-40°F)

    6. Reconnect the fuel temperature sensor connector.


    OK

    REPLACE FUEL TEMPERATURE SENSOR

    NG

  5. READ VALUE USING INTELLIGENT TESTER (CHECK FOR SHORT IN ECM)


    1. A01BHIKE13

      Disconnect the D46 fuel temperature sensor connector.

    2. Disconnect the D1 ECM connector.

    3. Connect an intelligent tester to the DLC3.

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

    5. Select the following menu items: Powertrain / Engine / Data List / Fuel Temperature.

    6. Read the value.

      Standard
      -40°C (-40°F)

    7. Reconnect the ECM connector.

    8. Reconnect the fuel temperature sensor connector.


    OK

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    NG

    REPLACE ECM