1.CHECK COMBINATION METER INPUT SIGNAL

1. Turn the ignition switch ON.
2. Check the voltage between the combination meter harness connector and the ground.

   Probe | Voltage
   (+) | (-) |
   Combination meter | Ground
   Connector | Terminal
   M53 | 38

Does it match the fuel gauge indication position?
YES>>GO TO 2.
NO>>Replace the combination meter.
2.CHECK FUEL LEVEL SENSOR UNIT (SUB) CIRCUIT

1. Turn the ignition switch OFF.
2. Disconnect the connectors of combination meter and fuel level sensor unit (sub).
3. Check for continuity between the combination meter harness connector and the fuel level sensor unit (sub) harness connector.

   Combination meter | Fuel level sensor unit (sub) | Continuity
   Connector | Terminal | Connector | Terminal
   M53 | 38 | B27 | 1 | Existed

4. Check for continuity between the combination meter harness connector and the ground.

   Combination meter | Ground | Continuity
   Connector | Terminal
   M53 | 38 | Not existed

Is the inspection result normal?
YES>>GO TO 3.
NO>>Repair the harnesses or connectors.
3.CHECK fuel level sensor unit (MAIN-SUB) CIRCUIT

1. Disconnect fuel level sensor unit (main) connector.
2. Check for continuity between the fuel level sensor unit (sub) harness connector and the fuel level sensor unit (main) harness connector.

   Fuel level sensor unit (sub) | Fuel level sensor unit (main) | Continuity
   Connector | Terminal | Connector | Terminal
   B27 | 2 | B225 | 2 | Existed

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

   Fuel level sensor unit (sub) | Ground | Continuity
   Connector | Terminal
   B27 | 2 | Not existed

Is the inspection result normal?
YES>>GO TO 4.
NO>>Repair the harnesses or connectors.
4.CHECK FUEL LEVEL SENSOR UNIT (MAIN) CIRCUIT
Check for continuity between the fuel level sensor unit (main) harness connector and the combination meter harness connector.

Fuel level sensor unit (main) | Combination meter | Continuity
Connector | Terminal | Connector | Terminal
B225 | 3 | M53 | 18 | Existed

Is the inspection result normal?
YES>>INSPECTION END
NO>>Repair the harnesses or connectors.