Diagnosis Procedure

FUEL LEVEL SENSOR SIGNAL CIRCUIT


Description

The fuel level sensor unit and fuel pump (main) and the fuel level sensor unit (sub) detect the fuel level in the fuel tank and transmit the fuel level sensor signal to the unified meter and A/C amp.




FUEL LEVEL SENSOR SIGNAL CIRCUIT


Diagnosis Procedure

1.CHECK UNIFIED METER AND A/C AMP. INPUT SIGNAL
1. Turn ignition switch ON.
2. Check voltage between unified meter and A/C amp. harness connector terminal and ground.





Does it match fuel gauge reading?
YES - GO TO 2.
NO - Replace the unified meter and A/C amp.
2.CHECK FUEL LEVEL SENSOR (SUB) CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect unified meter and A/C amp. connector and fuel level sensor unit (sub) connector.
3. Check continuity between unified meter and A/C amp. harness connector terminal and fuel level sensor unit (sub) harness connector terminal.





4. Check continuity between unified meter and A/C amp. harness connector terminal and ground.





Is the inspection result normal?
OK - GO TO 3.
NG - Repair harness or connector.
3.CHECK FUEL LEVEL SENSOR (MAIN-SUB) CIRCUIT
1. Disconnect fuel level sensor unit and fuel pump (main) connector.
2. Check continuity between fuel level sensor unit (sub) harness connector terminal and fuel level sensor unit and fuel pump (main) harness connector terminal.





3. Check continuity between fuel level sensor unit (sub) harness connector terminal and ground.





Is the inspection result normal?
OK - GO TO 4.
NG - Repair harness or connector.
4.CHECK FUEL LEVEL SENSOR (MAIN) CIRCUIT
Check continuity between fuel level sensor unit and fuel pump (main) harness connector terminal and unified meter and A/C amp. harness connector terminal.





Is the inspection result normal?
OK - INSPECTION END
NG - Repair harness or connector.