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.
<Reference data>
*: These data are reference values and are measured between ECM terminals 95 (Fuel tank temperature sensor) and 104 (sensor ground).
DTC Logic
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.INSPECTION START
2.PRECONDITIONING
If DTC CONFIRMATION PROCEDURE has been previously conducted, always perform the following procedure before conducting the next test.
3.PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION A-I
4.CHECK ENGINE COOLANT TEMPERATURE
With CONSULT
With GST
Follow the procedure "With CONSULT" above.
5.PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION A-II
With CONSULT
With GST
Follow the procedure "With CONSULT" above.
6.PERFORM COMPONENT FUNCTION CHECK (FOR MALFUNCTION B)
Perform component function check. Refer to EC-271, "Component Function Check".
NOTE: Use the component function check to check the overall function of the FTT sensor circuit. During this check, a 1st trip DTC might not be confirmed.
7.PRECONDITIONING
If DTC CONFIRMATION PROCEDURE has been previously conducted, always perform the following procedure before conducting the next test.
TESTING CONDITION:
8.PERFORM DTC CONFIRMATION PROCEDURE B
NOTE: The vehicle must be cooled with the food open.
Component Function Check
1.CHECK FUEL TANK TEMPERATURE (FTT) SENSOR
2.CHECK INTERMITTENT INCIDENT
Check intermittent incident.
Diagnosis Procedure
1.INSPECTION START
Confirm the detected malfunction (A or B).
2.CHECK GROUND CONNECTION
3.CHECK FUEL TANK TEMPERATURE SENSOR POWER SUPPLY CIRCUIT
4.DETECT MALFUNCTIONING PART
Check the following.
5.CHECK FUEL TANK TEMPERATURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
6.DETECT MALFUNCTIONING PART
Check the following.
7.CHECK FUEL TANK TEMPERATURE SENSOR
8.CHECK INTERMITTENT INCIDENT
Component Inspection
1.CHECK FUEL TANK TEMPERATURE SENSOR
Wiring diagram
POWER DISTRIBUTION SYSTEM
Wiring Diagram
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