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

DTC Code DTC Name
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 in voltage (See Fig. 1).

The fuel temperature sensor is powered by a 5 V supply from the THF terminal of the ECM, 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 supply pump assembly and determines if there are malfunctions.

A01VFXXE02

Tech Tips

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

P0182, P0183
DTC Detection Drive Pattern DTC Detection Condition Trouble Area
Ignition switch ON for approximately 15 seconds

Open or short in fuel temperature sensor circuit for 2 seconds

(2 trip detection logic)

  • Open or short in fuel temperature sensor circuit

  • Fuel temperature sensor

  • ECM
Related Data List
DTC No. Data List
P0182 Fuel Temperature
P0183

Tech Tips

When DTC P0182 or P0183 is stored, check the fuel temperature by entering the following menus on the GTS: Powertrain / Engine and ECT / Data List / Fuel Temperature.

Temperature Displayed Malfunction
-40°C (-40°F) Open circuit
150°C (302°F) Short circuit

WIRING DIAGRAM

A01VJ10E03

CAUTION / NOTICE / HINT

Note

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

Tech Tips


  • 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.

PROCEDURE


  1. READ VALUE USING GTS (FUEL TEMPERATURE)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

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

    5. Read the value.

      OK
      Same as actual fuel temperature.
      Result
      Result Proceed to
      -40°C (-40°F) A
      150°C (302°F) or higher B
      Same as actual fuel temperature C

      Tech Tips


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

      • If there is a short circuit, the GTS indicates 150°C (302°F) or higher.


    B

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

    C

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here

    A

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


    1. A01VLI1E02
      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 B44-1 and B44-2 of the fuel temperature sensor wire harness side connector.

    3. Connect the GTS to the DLC3.

    4. Turn the ignition switch to ON.

    5. Turn the GTS on.

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

    7. Read the value.

      Standard value
      150°C (302°F) or higher
      Result
      Result Proceed to
      NG A
      OK B

    B

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

    A

  3. CHECK HARNESS AND CONNECTOR (FUEL TEMPERATURE SENSOR - ECM)


    1. Disconnect the B44 fuel temperature sensor connector.

    2. Disconnect the B104 ECM connector (for LHD).

    3. Disconnect the B103 ECM connector (for RHD).

    4. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      B44-1 - B104-101 (THF) Always Below 1 Ω
      B44-2 - B104-133 (ETHF) Always Below 1 Ω
      for RHD
      Tester Connection Condition Specified Condition
      B44-1 - B103-101 (THF) Always Below 1 Ω
      B44-2 - B103-133 (ETHF) Always Below 1 Ω

    OK

    CONFIRM GOOD CONNECTION TO ECM. IF OK, REPLACE ECM Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR Click here

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


    1. A01VHVDE04
      Text in Illustration
      *1 Fuel Temperature Sensor (Supply Pump Assembly)
      *2 ECM

      Disconnect the B44 fuel temperature sensor connector.

    2. Connect the GTS to the DLC3.

    3. Turn the ignition switch to ON.

    4. Turn the GTS on.

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

    6. Read the value.

      Standard value
      -40°C (-40°F)
      Result
      Result Proceed to
      NG A
      OK B

    B

    REPLACE FUEL TEMPERATURE SENSOR Click here

    A

  5. CHECK HARNESS AND CONNECTOR (FUEL TEMPERATURE SENSOR - ECM)


    1. Disconnect the B44 fuel temperature sensor connector.

    2. Disconnect the B104 ECM connector (for LHD).

    3. Disconnect the B103 ECM connector (for RHD).

    4. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      B44-1 or B104-101 (THF) - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      B44-1 or B103-101 (THF) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR Click here

    OK

  6. REPLACE ECM


    1. Replace the ECM Click here.


    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here

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


    1. Replace the fuel temperature sensor Click here.


    NEXT

    BLEED AIR FROM FUEL SYSTEM Click here

  8. REPAIR OR REPLACE HARNESS OR CONNECTOR


    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here

  9. CONFIRM GOOD CONNECTION TO ECM. IF OK, REPLACE ECM


    1. Replace the ECM Click here.


    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here

  10. REPLACE FUEL TEMPERATURE SENSOR


    1. Replace the fuel temperature sensor Click here.


    NEXT

  11. BLEED AIR FROM FUEL SYSTEM


    1. Bleed air from fuel system Click here.


    NEXT

  12. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Clear the DTCs Click here.

    5. Turn the ignition switch off and wait for 30 seconds or more.

    6. Turn the ignition switch to ON and wait for 15 seconds or more.

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

    8. Confirm that the DTC is not output again.


    NEXT

    END