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.

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

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

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

OR

With Generic Scan Tool
1. Turn ignition switch "ON" and wait at least 10 seconds.
2. Select "MODE 7" with GST.
If the result is NG, go to "Diagnostic Procedure" below.
If the result is OK, go to following step.
3. Select "MODE 1" with GST and check for the engine coolant temperature.
4. Cool engine down until the engine coolant temperature is less than 60°C (140°F). If the temperature is already less than 60°C (140°F) before step 4), the result will be OK.
5. Wait at least 10 seconds.
6. Select "MODE 7" with GST.
7. If 1St trip DTC is detected, go to "Diagnostic Procedure" below.

OR

Without Scan Tools
1. Turn ignition switch "ON" and wait at least 10 seconds.
2. Turn ignition switch "OFF ", wait at least 5 seconds and then turn "ON ".
3. Perform "Diagnostic Test Mode II (Self-diagnostic results)" with ECM.
If the result is NG, go to "Diagnostic Procedure" below.
If the result is OK, go to following step.
4. Cool engine down until the voltage between ECM terminal (51)(Engine coolant temperature) and ground becomes more than 1.9V.
If the voltage is already more than 1.9V before step 4), the result will be OK.
5. Wait at least 10 seconds.
6. Turn ignition switch "OFF ", wait at least 5 seconds and then turn "ON ".
7. Perform "Diagnostic Test Mode II (Self-diagnostic results)" with ECM.
8. If 1st trip DTC is detected, go to "Diagnostic Procedure" below.

EC-FTTS-01:

EC-FTTS-01 - Connector View:

WIRING DIAGRAM

Diagnostic Procedure:

DIAGNOSTIC PROCEDURE




COMPONENT INSPECTION
Check resistance by heating with hot water or heat gun as shown in the figure.




If NG, replace fuel tank temperature sensor.