P0180

Reference Data:

Component Description
The tank fuel 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:

DTC Confirmation Procedure

NOTE: If "DTC 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.




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 "COOLAN TEMP/S" is less than 60°C (140°F), the result will be OK.
If "COOLAN TEMP/S" is above 60°C (140°F), go to the following step.
5. Cool engine down until "COOLAN TEMP/S" 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
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.
If the temperature is less than 60°C (140°F), the result will be OK.
If the temperature is above 60°C (140°F), go to the following step.
4. Cool engine down until the engine coolant temperature is less than 60°C (140°F).
5. Wait at least 10 seconds.
6. Select "MODE 7" with GST.
7. If 1st trip DTC is detected, go to "Diagnostic Procedure" below.




Without Scan Tool
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. Check voltage between ECM terminal 59 (Engine coolant temperature sensor signal) and ground.
If the voltage is more than 1.9V, the result will be OK.
If the voltage is less than 1.9V, go to the following step.
5. Cool engine down until the voltage becomes more than 1.9V.
6. Wait at least 10 seconds.
7. Turn ignition switch "OFF", wait at least 5 seconds and then turn "ON".
8. Perform "Diagnostic Test Mode (Self-diagnostic results)" with ECM.
9. If 1st trip DTC is detected, go to "Diagnostic Procedure" below.

EC-TFTS-01:

EC-TFTS-01 Connectors View:

Wiring Diagram

Step 1:

Step 2:

Step 3:

Step 4:

Step 5:

Step 6:

Diagnostic Procedure




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

Temperature °C (°F) Resistance K Ohms
20 (68) 2.3 - 2.7
50 (122) 0.79 - 0.90

If NG, replace tank fuel temperature sensor.