Dtc P0180 Fuel Temperature Sensor A Circuit


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

READ VALUE USING INTELLIGENT TESTER (FUEL TEMPERATURE)

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

REPLACE FUEL SUPPLY PUMP ASSEMBLY (FUEL TEMPERATURE SENSOR)

CHECK HARNESS AND CONNECTOR (FUEL TEMPERATURE SENSOR - ECM)

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

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

REPLACE FUEL SUPPLY PUMP ASSEMBLY (FUEL TEMPERATURE SENSOR)

CHECK HARNESS AND CONNECTOR (FUEL TEMPERATURE SENSOR - ECM)

REPLACE ECM

BLEED AIR FROM FUEL SYSTEM

PERFORM FUEL SUPPLY PUMP INITIALIZATION

REPAIR OR REPLACE HARNESS OR CONNECTOR

CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

DTC P0180 Fuel Temperature Sensor "A" Circuit

DTC P0182 Fuel Temperature Sensor "A" Circuit Low Input

DTC 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 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 in 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.
Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.2Kd-Ftv Engine Control System.Ecd System. Dtc P0180 Fuel Temperature Sensor A Circuit

P0180
DTC Detection Drive Pattern
DTC Detection Condition
Trouble Area
Ignition switch to ON for 0.5 seconds
Open or short in the fuel temperature sensor circuit for 0.5 seconds (1 trip detection logic).
  1. Open or short in fuel temperature sensor circuit
  2. Fuel temperature sensor (fuel supply pump assembly)
  3. ECM

P0182
DTC Detection Drive Pattern
DTC Detection Condition
Trouble Area
Ignition switch to ON for 0.5 seconds
Short in the fuel temperature sensor circuit for 0.5 seconds (1 trip detection logic).
  1. Short in fuel temperature sensor circuit
  2. Fuel temperature sensor (fuel supply pump assembly)
  3. ECM

P0183
DTC Detection Drive Pattern
DTC Detection Condition
Trouble Area
Ignition switch to ON for 0.5 seconds
Open in the fuel temperature sensor circuit for 0.5 seconds (1 trip detection logic).
  1. Open in fuel temperature sensor circuit
  2. Fuel temperature sensor (fuel supply pump assembly)
  3. ECM

Related Data List
DTC No.
Data List
P0180
Fuel Temp
P0182
P0183
HINT:
  1. If DTC P0180, P0182 and/or P0183 is stored, the following symptoms may appear:
    1. Misfire
    2. Combustion noise
    3. Black smoke
    4. Lack of power
  2. When DTC P0180, P0182 and/or P0183 is stored, check the intake air temperature by entering the following menus: Powertrain / Engine and ECT / Data List / Fuel Temp.

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

WIRING DIAGRAM


Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.2Kd-Ftv Engine Control System.Ecd System. Dtc P0180 Fuel Temperature Sensor A Circuit


INSPECTION PROCEDURE

NOTICE:
After replacing the ECM, the new ECM needs registration (Toyota Fortuner RM0000012XK04AX.html) and initialization (Toyota Fortuner RM000000TIN04KX.html).
HINT:
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.
1.READ VALUE USING INTELLIGENT TESTER (FUEL TEMPERATURE)

  1. Connect the intelligent tester to the DLC3.

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

  1. Enter the following menus: Powertrain / Engine and ECT / Data List / Fuel Temp.

  1. Read the value.

    OK:
    Same as the actual fuel temperature

    Result
    Result
    		Proceed to
    -40°C (-40°F)
    		A
    140°C (284°F) or higher
    		B
    OK (Same as actual fuel temperature)
    		C
    HINT:
    1. If there is an open circuit, the tester indicates -40°C (-40°F).
    2. If there is a short circuit, the tester indicates 140°C (284°F) or higher.


B
Go to step 6

C
Go to step 13
A


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


    Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.2Kd-Ftv Engine Control System.Ecd System. Dtc P0180 Fuel Temperature Sensor A Circuit

  1. Disconnect the fuel temperature sensor connector.

  1. Connect terminals 2 and 1 of the fuel temperature sensor connector.

  1. Connect the intelligent tester to the DLC3.

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

  1. Enter the following menus: Powertrain / Engine and ECT / Data List / Fuel Temp.

  1. Read the value.

    OK:
    140°C (284°F) or higher
    Text in Illustration
    *1
    		Fuel Temperature Sensor
    *2
    		ECM
    *a
    		Front view of wire harness connector
    (to Fuel Temperature Sensor)

  1. Reconnect the fuel temperature sensor connector.



NG
Go to step 4
OK


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

  1. Replace the fuel supply pump assembly (Toyota Fortuner RM0000014FO014X.html).



NEXT
Go to step 10

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

  1. Disconnect the fuel temperature sensor connector.

  1. Disconnect the ECM connector.

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

    Standard Resistance:

    Tester Connection
    		Condition
    		Specified Condition
    F10-2 - E7-29 (THF)
    		Always
    		Below 1 Ω
    F10-1 - E7-28 (E2)
    		Always
    		Below 1 Ω

  1. Reconnect the fuel temperature sensor connector.

  1. Reconnect the ECM connector.



NG
Go to step 12
OK


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

  1. Replace the ECM (Toyota Fortuner RM0000043H100CX.html).



NEXT
Go to step 13

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


    Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.2Kd-Ftv Engine Control System.Ecd System. Dtc P0180 Fuel Temperature Sensor A Circuit

  1. Disconnect the fuel temperature sensor connector.

  1. Connect the intelligent tester to the DLC3.

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

  1. Enter the following menus: Powertrain / Engine and ECT / Data List / Fuel Temp.

  1. Read the value.

    OK:
    -40°C (-40°F)
    Text in Illustration
    *1
    		Fuel Temperature Sensor
    *2
    		ECM

  1. Reconnect the fuel temperature sensor connector.



NG
Go to step 8
OK


7.REPLACE FUEL SUPPLY PUMP ASSEMBLY (FUEL TEMPERATURE SENSOR)

  1. Replace the fuel supply pump assembly (Toyota Fortuner RM0000014FO014X.html).



NEXT
Go to step 10

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

  1. Disconnect the fuel temperature sensor connector.

  1. Disconnect the ECM connector.

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

    Standard Resistance:

    Tester Connection
    		Condition
    		Specified Condition
    F10-2 or E7-29 (THF) - Body ground
    		Always
    		10 kΩ or higher

  1. Reconnect the fuel temperature sensor connector.

  1. Reconnect the ECM connector.



NG
Go to step 12
OK


9.REPLACE ECM

  1. Replace the ECM (Toyota Fortuner RM0000043H100CX.html).



NEXT
Go to step 13

10.BLEED AIR FROM FUEL SYSTEM

  1. Bleed the air from the fuel system (Toyota Fortuner RM000002SY801YX_01_0002.html).


NEXT


11.PERFORM FUEL SUPPLY PUMP INITIALIZATION

  1. Perform fuel supply pump initialization (Toyota Fortuner RM000000TIN04KX.html).



NEXT
Go to step 13

12.REPAIR OR REPLACE HARNESS OR CONNECTOR

  1. Repair or replace the harness or connector.


NEXT


13.CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

  1. Connect the intelligent tester to the DLC3.

  1. Clear the DTCs (Toyota Fortuner RM000000PDK0TWX.html).

  1. Turn the ignition switch to ON for 1 second or more.

  1. Enter the following menus: Powertrain / Engine and ECT / DTC.

  1. Confirm that the DTC is not output again.


NEXT

END