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ECD SYSTEM (w/o DPF), Diagnostic DTC:P0180, P0182, P0183

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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
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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 of 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 and determines if there are errors.

Table 1. P0180
DTC Detection Drive Pattern DTC Detection Condition Trouble Area
Ignition switch 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
Table 2. P0182
DTC Detection Drive Pattern DTC Detection Condition Trouble Area
Ignition switch 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
Table 3. P0183
DTC Detection Drive Pattern DTC Detection Condition Trouble Area
Ignition switch 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
Table 4. Related Data List
DTC No. Data List
P0180 Fuel Temp
P0182
P0183
Tip:

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


    • Misfire

    • Combustion noise

    • Black smoke

    • Lack of power

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WIRING DIAGRAM

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INSPECTION PROCEDURE

Note:

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

Tip:

  • If DTCs relating to different systems are stored, and they share terminal E2 as their ground, check this ground circuit first.

  • Read freeze frame data using the intelligent tester. 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.

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PROCEDURE


  1. Click here

    READ VALUE USING INTELLIGENT TESTER (FUEL TEMPERATURE)


    1. Connect the intelligent tester to the DLC3.

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

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

    4. Read the value.

      OK
      Same value as the actual fuel temperature.
      Table 5. Result
      Result Proceed to
      -40°C (-40°F) A
      140°C (284°F) or more B
      OK (Same as actual fuel temperature) C
      Tip:

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

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


  2. Click here

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


    1. A015C62E05

      Disconnect the fuel temperature sensor connector.

    2. Connect terminals 2 (THF) and 1 (E2) of the fuel temperature sensor connector.

    3. Connect the intelligent tester to the DLC3.

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

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

    6. Read the value.

      OK
      140°C (284°F) or higher

  3. Click here

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


    1. Replace the fuel temperature sensor (Click here).


  4. Click here

    CHECK HARNESS AND CONNECTOR (FUEL TEMPERATURE SENSOR - ECM)


    1. A0155FIE03

      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 (Check for Open)
      Table 6. for LHD
      Tester Connection Condition Specified Condition
      z65-2 (THF) - C45-116 (THF) Always Below 1 Ω
      z65-1 (E2) - C45-75 (E2) Always Below 1 Ω
      Table 7. for RHD
      Tester Connection Condition Specified Condition
      z65-2 (THF) - C46-116 (THF) Always Below 1 Ω
      z65-1 (E2) - C46-75 (E2) Always Below 1 Ω

  5. Click here

    CONFIRM GOOD CONNECTION TO ECM. IF OK, REPLACE ECM


    1. Replace the ECM (Click here).


  6. Click here

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


    1. A015D3SE06

      Disconnect the fuel temperature sensor connector.

    2. Connect the intelligent tester to the DLC3.

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

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

    5. Read the value.

      OK
      -40°C (-40°F)

  7. Click here

    REPLACE FUEL TEMPERATURE SENSOR


    1. Replace the fuel temperature sensor (Click here).


  8. Click here

    CHECK HARNESS AND CONNECTOR (FUEL TEMPERATURE SENSOR - ECM)


    1. A0155FIE04

      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 (Check for Short)
      Table 8. for LHD
      Tester Connection Condition Specified Condition
      z65-2 (THF) or C45-116 (THF) - Body ground Always 10 kΩ or higher
      Table 9. for RHD
      Tester Connection Condition Specified Condition
      z65-2 (THF) or C46-116 (THF) - Body ground Always 10 kΩ or higher

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    REPLACE ECM


    1. Replace the ECM (Click here).


  10. Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR


  11. Click here

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED


    1. Connect the intelligent tester to the DLC3.

    2. Clear the DTCs (Click here).

    3. Turn the ignition switch off.

    4. Turn the ignition switch to ON for 1 second.

    5. Enter the following menus: Powertrain / Engine / DTC.

    6. Confirm that the DTC is not output again.


  12. Click here

    END