1Kd-Ftv Engine Control. Dtc P0180 Fuel Temperature Sensor A Circuit

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.
Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.1Kd-Ftv Engine Control.Ecd System (For Dpf).
Dtc
P0180 Fuel Temperature Sensor A Circuit

Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.1Kd-Ftv Engine Control.Ecd System (For Dpf).
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).	Open or short in fuel temperature sensor circuit Fuel temperature sensor (fuel supply pump assembly) 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).	Short in fuel temperature sensor circuit Fuel temperature sensor (fuel supply pump assembly) 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).	Open in fuel temperature sensor circuit Fuel temperature sensor (fuel supply pump assembly) ECM

Related Data List
DTC No.	Data List
P0180	Fuel Temp
P0182
P0183

HINT:

If DTC P0180, P0182 and/or P0183 is stored, the following symptoms may appear:

Misfire
Combustion noise
Black smoke
Lack of power

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

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

WIRING DIAGRAM

INSPECTION PROCEDURE

NOTICE:

After replacing the ECM, the new ECM needs registration (HILUX_TGN26 RM0000012XK05CX.html) and initialization (HILUX_TGN26 RM000000TIN04EX.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)

Connect the intelligent tester to the DLC3.

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

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

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.

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

Go to step 6

Go to step 13

A

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

Disconnect the fuel temperature sensor connector.

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

Connect the intelligent tester to the DLC3.

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

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

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)

Text in Illustration
*1	Fuel Temperature Sensor
*2	ECM
*a	Front view of wire harness connector (to Fuel Temperature Sensor)

Reconnect the fuel temperature sensor connector.

Go to step 4

OK

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

Replace the fuel supply pump assembly (HILUX_TGN26 RM0000014FO01RX.html).

Go to step 10

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

Disconnect the fuel temperature sensor connector.

Disconnect the ECM connector.

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

Standard Resistance:

Tester Connection
Condition
Specified Condition
C19-2 - C22-29 (THF)
Always
Below 1 Ω
C19-1 - C22-28 (E2)
Always
Below 1 Ω

Reconnect the fuel temperature sensor connector.

Reconnect the ECM connector.

Go to step 12

OK

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

Replace the ECM (HILUX_TGN26 RM0000013Z001IX.html).

Go to step 13

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

Disconnect the fuel temperature sensor connector.

Connect the intelligent tester to the DLC3.

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

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

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

Text in Illustration
*1	Fuel Temperature Sensor
*2	ECM

Reconnect the fuel temperature sensor connector.

Go to step 8

OK

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

Replace the fuel supply pump assembly (HILUX_TGN26 RM0000014FO01RX.html).

Go to step 10

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

Disconnect the fuel temperature sensor connector.

Disconnect the ECM connector.

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

Standard Resistance:

Tester Connection
Condition
Specified Condition
C19-2 or C22-29 (THF) - Body ground
Always
10 kΩ or higher

Reconnect the fuel temperature sensor connector.

Reconnect the ECM connector.

Go to step 12

OK

9.REPLACE ECM

Replace the ECM (HILUX_TGN26 RM0000013Z001IX.html).

Go to step 13

10.BLEED AIR FROM FUEL SYSTEM

Bleed the air from the fuel system (HILUX_TGN26 RM000002SY8025X_01_0002.html).

NEXT

11.PERFORM FUEL SUPPLY PUMP INITIALIZATION

Perform fuel supply pump initialization (HILUX_TGN26 RM000000TIN04EX.html).

Go to step 13

12.REPAIR OR REPLACE HARNESS OR CONNECTOR

Repair or replace the harness or connector.

NEXT

13.CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

Connect the intelligent tester to the DLC3.

Clear the DTCs (HILUX_TGN26 RM000000PDK0XCX.html).

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

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

Confirm that the DTC is not output again.

END

Tester Connection	Condition	Specified Condition
C19-2 - C22-29 (THF)	Always	Below 1 Ω
C19-1 - C22-28 (E2)	Always	Below 1 Ω