DTC 0402

Fuel Temperature Sensor (DTC: 0402)
The fuel temperature sensor, built into the fuel tube, senses fuel temperature. When the fuel temperature is higher than specified, the ECM (ECCS control module) turns the fuel pressure regulator control solenoid valve ON and raises fuel pressure.
* Freeze frame data is not stored in the ECM for fuel temperature sensor. The MIL will not light up for a fuel temperature sensor malfunction.




DIAGNOSTIC TROUBLE CODE CONFIRMATION PROCEDURE

With Consult
1) Turn ignition switch "ON".
2) Select "DATA MONITOR" mode with CONSULT.
3) Wait at least 5 seconds.

OR

With GST
1) Turn ignition switch "ON" and wait at least 5 seconds.
2) Select "MODE 3" with GST.

OR

Without Scan Tools
1) Turn ignition switch "ON" and wait at least 5 seconds.
2) Turn ignition switch "OFF" and wait at least 5 seconds, and then turn "ON".
3) Perform "Diagnostic Test Mode II (Self-diagnostic results)" with ECM.




WIRING DIAGRAM




DIAGNOSTIC PROCEDURE

COMPONENT INSPECTION
Fuel temperature sensor
1. Disconnect fuel temperature sensor harness connector.




2. Check resistance between terminal and ground as shown in the figure.




If NG, replace fuel temperature sensor.