P0180

Reference Data:

COMPONENT DESCRIPTION
The fuel tank temperature sensor 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.

CAUTION: Do not use ECM ground terminals when measuring voltage.
Doing so may result in damage to the ECM's transistor. Use a ground other than ECM terminals such as the body ground.

On Board Diagnosis Logic:

DIAGNOSTIC TROUBLE CODE CONFIRMATION PROCEDURE

NOTE: If "DIAGNOSTIC TROUBLE CODE CONFIRMATION PROCEDURE" has been previously conducted, always turn ignition switch "OFF" and wait at least 5 seconds before conducting the next test.

With Consult
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".
If the result is OK, go to following step.

NOTE: If "COOLAN TEMP/S" is already less than 90 °C (194 °F) before step 4), the result will be OK. If "COOLAN TEMP/S" is above 90 °C (194 °F), go to the following step.

4. Cool engine down until "COOLAN TEMP/S" is less than 90 °C (194 °F).
5. Wait at least 10 seconds.
6. If 1st trip DTC is detected, go to "DIAGNOSTIC PROCEDURE".

With Generic Scan Tool
Follow the procedure "With CONSULT-II" above.

EC-FTTS-01:

EC-FTTS-01 Connector View:

WIRING DIAGRAM

Super Multiple Junction (SMJ) Terminal Arrangement (B3, D1, D21, E66, M4, M6, M11, M12, M45, N1):

Super Multiple Junction (SMJ) Terminal Arrangement (B4, B101, E70, E81, F63, M3, M49, M50):

Super Multiple Junction (SMJ) Terminal Arrangement (B102, F64):

DIAGNOSTIC PROCEDURE

COMPONENT INSPECTION

Fuel Tank Temperature Sensor:

Fuel tank temperature sensor
Check resistance by heating with hot water or heat gun as shown in the figure.
If NG, replace fuel tank temperature sensor.