Diagnosis Procedure

1. Ignition switch OFF.
2. Check combination meter and fuel level sensor unit terminals (meter-side and harness-side) for poor connection.

Is the inspection result normal?

YES

GO TO 2.

NO

Repair or replace terminals or connectors.

1. Disconnect combination meter connector and fuel level sensor unit connector.
2. Check continuity between combination meter harness connector and fuel level sensor unit and fuel pump harness connector.

   Fuel level sensor unit and fuel pump (fuel level sensor)		Combination meter		Continuity
   Connector	Terminal	Connector	Terminal
   C5 (with VQ40DE) C37 (with VK56VD)	2	M24	12	Yes

3. Check continuity between fuel level sensor unit and fuel pump harness connector and ground.

   Fuel level sensor unit and fuel pump (fuel level sensor)		--	Continuity
   Connector	Terminal
   C5 (with VQ40DE) C37 (with VK56VD)	2	Ground	No

Is the inspection result normal?

YES

GO TO 3.

NO

Repair harness or connector.

1. Check continuity between combination meter harness connector and fuel level sensor unit and fuel pump harness connector.

   Fuel level sensor unit and fuel pump (fuel level sensor)		Combination meter		Continuity
   Connector	Terminal	Connector	Terminal
   C5 (with VQ40DE) C37 (with VK56VD)	5	M24	24	Yes

2. Check continuity between fuel level sensor unit and fuel pump harness connector and ground.

   Fuel level sensor unit and fuel pump (fuel level sensor)		--	Continuity
   Connector	Terminal
   C5 (with VQ40DE) C37 (with VK56VD)	5	Ground	No

Is the inspection result normal?

YES

GO TO 4.

NO

Repair harness or connector.

Check fuel level sensor unit installation, and check whether the float arm interferes or binds with any of the internal components in the fuel tank.

Is the inspection result normal?

YES

Inspection End.

NO

Install the fuel level sensor unit properly. Refer to Removal and Installation - VQ40DE (with VQ40DE) or Removal and Installation - VK56VD (with VK56VD).