СИСТЕМА ECD, 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

A012GHDE01
Table 1.
*1 (Fig. 1)
*2 Resistance kΩ
*3 Acceptable
*4 Temperature °C (°F)

The fuel temperature sensor is built into the supply pump assembly and senses 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, 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 supply pump assembly.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory
P0180 Fuel Temperature Sensor "A" Circuit 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 (built into supply pump assembly)

  • ECM

Comes on DTC stored
P0182 Fuel Temperature Sensor "A" Circuit Low Input Short in the fuel temperature sensor circuit for 0.5 seconds (1 trip detection logic).
  • Short in fuel temperature sensor circuit

  • Fuel temperature sensor (built into supply pump assembly)

  • ECM

Comes on DTC stored
P0183 Fuel Temperature Sensor "A" Circuit High Input Open in the fuel temperature sensor circuit for 0.5 seconds (1 trip detection logic).
  • Open in fuel temperature sensor circuit

  • Fuel temperature sensor (built into supply pump assembly)

  • ECM

Comes on DTC stored
Table 2. Related Data List
DTC No. Data List
P0180 Fuel Temperature
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

CONFIRMATION DRIVING PATTERN

DTC No. DTC Detection Drive Pattern
P0180 Ignition switch ON for 0.5 seconds
P0182
P0183

WIRING DIAGRAM

A012JB0E24
Table 3.
*a Fuel Temperature Sensor (Built into Supply Pump Assembly)

CAUTION / NOTICE / HINT

Note:
Tip:

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 and turn the GTS on.

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

      Powertrain > Engine and ECT > Data List
      Tester Display
      Fuel Temperature
    4. Read the value.

      OK
      Same value as the actual fuel temperature.
      Result
      Result Proceed to
      -40°C (-40°F) A
      140°C (284°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 140°C (284°F) or higher.

    B Нажмите здесь

    C Нажмите здесь

    GO TO STEP 9


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

    1. Disconnect the fuel temperature sensor connector.

      A012MBYC02
      *1 Fuel Temperature Sensor
      *2 ECM
      *a

      Front view of wire harness connector

      (to Fuel Temperature Sensor)

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

    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 / All Data / Fuel Temperature.

      Powertrain > Engine and ECT > Data List
      Tester Display
      Fuel Temperature
    6. Read the value.

      OK
      140°C (284°F) or higher
      Result
      Proceed to
      OK
      NG
    NG Нажмите здесь

    OK
  3. REPLACE SUPPLY PUMP ASSEMBLY (FUEL TEMPERATURE SENSOR)

    1. Replace the supply pump assembly (fuel temperature sensor).

      Click hereНажмите здесь

      Result
      Proceed to
      NEXT
    NEXT
  4. BLEED AIR FROM FUEL SYSTEM

    1. Bleed the air from the fuel system.

      Click hereНажмите здесь

      Result
      Proceed to
      NEXT
    NEXT
  5. PERFORM SUPPLY PUMP INITIALIZATION

    1. Perform the supply pump initialization.

      Click hereНажмите здесь

      Result
      Proceed to
      NEXT
    NEXT Нажмите здесь

    GO TO STEP 9


  6. 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
      B147-2 - B164-112 (THF) Always Below 1 Ω
      B147-1 - B164-89 (ETHF) Always Below 1 Ω
      Result
      Proceed to
      OK
      NG
    NG Нажмите здесь

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

    1. Replace the ECM.

      Click hereНажмите здесь

      Result
      Proceed to
      NEXT
    NEXT Нажмите здесь

    GO TO STEP 9


  8. REPAIR OR REPLACE HARNESS OR CONNECTOR

    1. Repair or replace the harness or connector.

      Result
      Proceed to
      NEXT
    NEXT
  9. 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.

      Powertrain > Engine and ECT > Clear DTCs
    5. Turn the ignition switch to ON for 1 second or more.

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

    7. Confirm that the DTC is not output.

      Powertrain > Engine and ECT > Trouble Codes
      Result
      Proceed to
      NEXT
    NEXT

    END


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

    1. Disconnect the fuel temperature sensor connector.

      A012M93C07
      *1 Fuel Temperature Sensor
      *2 ECM
    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 / All Data / Fuel Temperature.

      Powertrain > Engine and ECT > Data List
      Tester Display
      Fuel Temperature
    5. Read the value.

      OK
      -40°C (-40°F)
      Result
      Proceed to
      OK
      NG
    NG Нажмите здесь

    OK
  11. REPLACE SUPPLY PUMP ASSEMBLY (FUEL TEMPERATURE SENSOR)

    1. Replace the supply pump assembly (fuel temperature sensor).

      Click hereНажмите здесь

      Result
      Proceed to
      NEXT
    NEXT Нажмите здесь

    GO TO STEP 4


  12. 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
      B147-2 or B164-112 (THF) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG
    NG Нажмите здесь

    GO TO STEP 8


    OK
  13. REPLACE ECM

    1. Replace the ECM.

      Click hereНажмите здесь

      Result
      Proceed to
      NEXT
    NEXT Нажмите здесь

    GO TO STEP 9