Related Diagnostic Procedures

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

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.






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".
If the result is OK, go to following step.
(4) Cool engine down until the voltage between ECM terminal (59) (Engine coolant temperature) and ground becomes more than 1.0V.
If the voltage is already more than 1.0V 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.






Electrical Diagrams






Circuit Connectors






DIAGNOSTIC PROCEDURE


COMPONENT INSPECTION
Tank fuel temperature sensor






Check resistance as shown in the figure.






If NG, replace tank fuel temperature sensor.