P0181

DTC P0181 FTT SENSOR







Component Description
The fuel tank temperature sensor (4) is used to detect the fuel temperature inside the fuel tank. The sensor modifies a voltage signal from the ECM. The modified signal returns to the ECM as the fuel temperature input. The sensor uses a thermistor which is sensitive to the change in temperature. The electrical resistance of the thermistor decreases as temperature increases.
- Fuel level sensor unit and fuel pump (1)
- Fuel pressure regulator (2)
- Fuel level sensor (3)

CAUTION: Do not use ECM ground terminals when measuring input/output voltage. Doing so may result damage the ECM's transistor. Use ground other than ECM, such as ground.




On Board Diagnosis Logic

DTC Confirmation Procedure

NOTE: If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at least 10 seconds before conducting the next test.

WITH CONSULT-II
1. Turn ignition switch ON.
2. Select "DATA MONITOR" mode with CONSULT-II




3. Wait at least 10 seconds.
If the result is NG, go to "Diagnostic Procedure" below.
If the result is OK, go to following step.

4. Check "COOLAN TEMP/S" value.
If the "COOLAN TEMP/S" is less than 60 °C (140 °F), the result will be OK.
If the "COOLAN TEMP/S" is above 60 °C (140 °F), go to the following step.

5. Cool engine down until "COOLAN TEMP/S" signal is less than 60 °C (140 °F).
6. Wait at least 10 seconds.
7. If 1st trip DTC is detected, go to "Diagnostic Procedure" below.

WITH GST
Follow the procedure "WITH CONSULT-II".

EC-FTTS-01:

Wiring Diagram

Step 1:

Step 1 (Continued)-4:

Step 4 (Continued)-7:

Diagnostic Procedure

Component Inspection

FUEL TANK TEMPERATURE SENSOR




1. Check resistance between "fuel level sensor unit and fuel pump" terminal 4 and 5 by heating with hot water as shown in the figure.
2. If NG, replace "fuel level sensor unit and fuel pump".