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 senses the fuel temperature. A thermistor built into the sensor changes its resistance value according to the fuel temperature. The lower the fuel temperature is, the greater the thermistor resistance becomes, and the higher the fuel temperature is, the lower the thermistor resistance becomes (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 the fuel temperature sensor are connected in series. When the resistance value of the fuel temperature sensor changes in accordance with the fuel temperature, the voltage at terminal THF also changes. Based on this signal, the ECM corrects the pressure control compensation of the injection or supply pump assembly and the error.

A01CIE2E05
P0180
DTC Detection Drive Pattern DTC Detection Condition Trouble Area
Ignition switch ON for 0.5 seconds 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 (built into injection or supply pump assembly)

  • ECM
P0182
DTC Detection Drive Pattern DTC Detection Condition Trouble Area
Ignition switch ON for 0.5 seconds 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 (built into injection or supply pump assembly)

  • ECM
P0183
DTC Detection Drive Pattern DTC Detection Condition Trouble Area
Ignition switch ON for 0.5 seconds 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 (built into injection or supply pump assembly)

  • ECM

Tech Tips

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

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

WIRING DIAGRAM

A01CHPVE04

INSPECTION PROCEDURE

Note


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

  • After replacing the injection or supply pump assembly, the ECM needs initialization Click here.

Tech Tips


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

  • Read freeze frame data using the intelligent tester. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was moving or stationary, whether the engine was warmed up or not, as well as other data recorded at the time of a malfunction.

PROCEDURE


  1. READ VALUE USING INTELLIGENT TESTER (FUEL TEMPERATURE)


    1. Replace the normal DLC3 cable (12 V specification) for the intelligent tester with the 24 V DLC3 cable.

      Note

      Be sure to use the 24 V DLC3 cable when connecting the intelligent tester to the DLC3. Using the normal DLC3 cable (12 V specification) will cause damage to the tester.

    2. Connect the intelligent tester to the DLC3.

    3. Turn the ignition switch to ON.

    4. Turn the tester on.

    5. Enter the following menus: Powertrain / Engine and ECT / Data List / Fuel Temperature.

    6. Read the value.

      Standard
      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 Click here

    A

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


    1. A01CHQSE25
      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 1 and 2 of the fuel temperature sensor wire harness side connector.

    3. Replace the normal DLC3 cable (12 V specification) for the intelligent tester with the 24 V DLC3 cable.

      Note

      Be sure to use the 24 V DLC3 cable when connecting the intelligent tester to the DLC3. Using the normal DLC3 cable (12 V specification) will cause damage to the tester.

    4. Connect the intelligent tester to the DLC3.

    5. Turn the ignition switch to ON.

    6. Turn the tester on.

    7. Enter the following menus: Powertrain / Engine and ECT / Data List / Fuel Temperature.

    8. Read the value.

      Standard
      140°C (284°F) or more

    9. Reconnect the fuel temperature sensor connector.


    NG

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

    OK

    REPLACE INJECTION OR SUPPLY PUMP ASSEMBLY (FUEL TEMPERATURE SENSOR) Click here

  3. 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 (Check for Open)
      Tester Connection Condition Specified Condition
      F31-2 - E35-4 (THF) Always Below 1 Ω
      F31-1 - E36-14 (E2) Always Below 1 Ω

    4. Reconnect the fuel temperature sensor connector.

    5. Reconnect the ECM connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (FUEL TEMPERATURE SENSOR - ECM)

    OK

    REPLACE ECM Click here

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


    1. A01CGN4E29
      Text in Illustration
      *1 Fuel Temperature Sensor
      *2 ECM

      Disconnect the fuel temperature sensor connector.

    2. Replace the normal DLC3 cable (12 V specification) for the intelligent tester with the 24 V DLC3 cable.

      Note

      Be sure to use the 24 V DLC3 cable when connecting the intelligent tester to the DLC3. Using the normal DLC3 cable (12 V specification) will cause damage to the tester.

    3. Connect the intelligent tester to the DLC3.

    4. Turn the ignition switch to ON.

    5. Turn the tester on.

    6. Enter the following menus: Powertrain / Engine and ECT / Data List / Fuel Temperature.

    7. Read the value.

      Standard
      -40°C (-40°F)

    8. Reconnect the fuel temperature sensor connector.


    NG

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

    OK

    REPLACE INJECTION OR SUPPLY PUMP ASSEMBLY (FUEL TEMPERATURE SENSOR) Click here

  5. 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 (Check for Short)
      Tester Connection Condition Specified Condition
      F31-2 or E35-4 (THF) - Body ground Always 10 kΩ or higher
      F31-1 or E36-14 (E2) - 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 (FUEL TEMPERATURE SENSOR - ECM)

    OK

    REPLACE ECM Click here