Code 0402

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

DIAGNOSTIC TROUBLE CODE CONFIRMATION PROCEDURE

With Consult
1) Turn ignition switch "ON".
2) Select "DATA MONITOR" mode with CONSULT.
3) Wait at least 12 seconds.

OR

With Generic Scan Tool
1) Turn ignition switch "ON" and wait at least 12 seconds.
2) Select "MODE 7" with GST.

OR

Without Scan Tool
1) Turn ignition switch "ON" and wait at least 12 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.

EC-TFTS-01 Tank Fuel Temperature Sensor (P0180):

Tank Fuel Temperature Sensor (P0180):

DIAGNOSTIC PROCEDURE









COMPONENT INSPECTION
Tank fuel temperature sensor Check resistance as shown in the figure.
If NG, replace tank fuel temperature sensor.