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СИСТЕМА ECD, Diagnostic DTC:P0182, P0183

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

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 assembly and determines if there are errors.

Tip:

When the fuel temperature sensor output is outside the normal range, the ECM determines that this is a malfunction.

DTC No. DTC Detection Condition Trouble Area
P0182

Open or short in fuel temperature sensor circuit for 2 seconds

(3 trip detection logic)

  • Open or short in fuel temperature sensor circuit

  • Fuel temperature sensor

  • ECM
DTC No. DTC Detection Condition Trouble Area
P0183

Open or short in fuel temperature sensor circuit for 2 seconds

(3 trip detection logic)

  • Open or short in fuel temperature sensor circuit

  • Fuel temperature sensor

  • ECM
Table 1. Related Data List
DTC No. Data List

P0182

P0183

 Fuel Temperature
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WIRING DIAGRAM

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INSPECTION PROCEDURE

Note:

When replacing the ECM, the ECM needs Registration and Initialization (Click here).

Tip:

  • When the ECM must be replaced, before replacing the ECM, perform the "Learning Values Save" function using the GTS. Then after installing the new ECM, perform all of the initialization/registrations for the "Learning Values Write" function by following the instructions shown on the GTS display.

  • 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.

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PROCEDURE


  1. Click here

    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 actual fuel temperature.
      Table 2. Result
      Result Proceed to
      -40°C (-40°F) A
      120°C (248°F) or higher B
      Same as actual fuel temperature C
      Tip:

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

      • If there is a short circuit, the GTS indicates 120°C (248°F) or higher.


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    READ VALUE USING GTS (CHECK FOR OPEN IN WIRE HARNESS)


    1. Disconnect the fuel temperature sensor connector.

    2. Connect terminals C95-1 (THF) and C95-2 (E2) of the fuel temperature sensor wire harness side 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.

      Standard value
      120°C (248°F) or higher

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    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
      C95-1 (THF) - C84-93 (THF) Always Below 1 Ω
      C95-2 (E2) - C84-124 (ETHF) Always Below 1 Ω

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


    1. 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.

      Standard value
      -40°C (-40°F)

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    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
      C95-1 (THF) or C84-93 (THF) - Body ground Always 10 kΩ or higher

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    REPLACE ECM


    1. Replace the ECM (Click here).


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


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


  8. Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR


    1. Repair or replace the harness or connector.


  9. Click here

    CONFIRM GOOD CONNECTION TO ECM. IF OK, REPLACE ECM


    1. Replace the ECM (Click here).


  10. Click here

    REPLACE FUEL TEMPERATURE SENSOR


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


  11. Click here

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED


    1. Connect the GTS to the DLC3.

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

    3. Clear the DTCs (Click here).

    4. Turn the ignition switch off and wait for 60 seconds or more [A].

    5. Turn the ignition switch to ON and wait for 15 seconds or more [B].

    6. Repeat [A] and [B] for the number of trips detected.

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

    8. Confirm that the DTC is not output again.


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    END