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 of 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 and determines if there are errors.

Dtc P0180 Fuel Temperature Sensor A Circuit. 1VD-FTV ENGINE CONTROL. Land Cruiser URJ200 URJ202 GRJ200 VDJ200

P0180
DTC Detection Drive Pattern	DTC Detection Condition	Trouble Area
Ignition switch 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 ECM

P0182
DTC Detection Drive Pattern	DTC Detection Condition	Trouble Area
Ignition switch 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 ECM

P0183
DTC Detection Drive Pattern	DTC Detection Condition	Trouble Area
Ignition switch 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 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

WIRING DIAGRAM

Dtc P0180 Fuel Temperature Sensor A Circuit. 1VD-FTV ENGINE CONTROL. Land Cruiser URJ200 URJ202 GRJ200 VDJ200

INSPECTION PROCEDURE

NOTICE:

After replacing the ECM, the new ECM needs registration () and initialization ().

HINT:

If DTCs relating to different systems are stored, and they share terminal E2 as their ground, check this ground circuit first.

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 / Data List / Fuel Temp.

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 more	B
OK (Same as actual fuel temperature)	C

HINT:

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

If there is a short circuit, the tester indicates 140°C (284°F) or more.

Go to step 6

Go to step 11

A

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

Disconnect the fuel temperature sensor connector.

Connect terminals 2 (THF) and 1 (E2) 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 / Data List / Fuel Temp.

Read the value.

OK:
140°C (284°F) or higher

Go to step 4

OK

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

Replace the fuel temperature sensor ().

Go to step 11

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 (Check for Open):
for LHD
Tester Connection Condition Specified Condition
z65-2 (THF) - C45-116 (THF) Always Below 1 Ω
z65-1 (E2) - C45-75 (E2) Always Below 1 Ω
for RHD
Tester Connection Condition Specified Condition
z65-2 (THF) - C46-116 (THF) Always Below 1 Ω
z65-1 (E2) - C46-75 (E2) Always Below 1 Ω

for LHD
Tester Connection	Condition	Specified Condition
z65-2 (THF) - C45-116 (THF)	Always	Below 1 Ω
z65-1 (E2) - C45-75 (E2)	Always	Below 1 Ω

for RHD
Tester Connection	Condition	Specified Condition
z65-2 (THF) - C46-116 (THF)	Always	Below 1 Ω
z65-1 (E2) - C46-75 (E2)	Always	Below 1 Ω

Go to step 10

OK

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

Replace the ECM ().

Go to step 11

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 / Data List / Fuel Temp.

Read the value.

OK:
-40°C (-40°F)

Go to step 8

OK

7.REPLACE FUEL TEMPERATURE SENSOR

Replace the fuel temperature sensor ().

Go to step 11

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 (Check for Short):
for LHD
Tester Connection Condition Specified Condition
z65-2 (THF) or C45-116 (THF) - Body ground Always 10 kΩ or higher
for RHD
Tester Connection Condition Specified Condition
z65-2 (THF) or C46-116 (THF) - Body ground Always 10 kΩ or higher

for LHD
Tester Connection	Condition	Specified Condition
z65-2 (THF) or C45-116 (THF) - Body ground	Always	10 kΩ or higher

for RHD
Tester Connection	Condition	Specified Condition
z65-2 (THF) or C46-116 (THF) - Body ground	Always	10 kΩ or higher

Go to step 10

OK

9.REPLACE ECM

Replace the ECM ().

Go to step 11

10.REPAIR OR REPLACE HARNESS OR CONNECTOR

NEXT

11.CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

Connect the intelligent tester to the DLC3.

Clear the DTCs ().

Turn the ignition switch off.

Turn the ignition switch to ON for 1 second.

Enter the following menus: Powertrain / Engine / DTC.

Confirm that the DTC is not output again.

END

1VD-FTV ENGINE CONTROL

Land Cruiser URJ200 URJ202 GRJ200 VDJ200

ECD SYSTEM w/o DPF