Seat Belt Buckle Switch Signal Circuit

SEAT BELT BUCKLE SWITCH SIGNAL CIRCUIT

Description

Transmits a seat belt buckle switch signal to the combination meter.


Component Function Check


1. CHECK COMBINATION METER INPUT SIGNAL

1.Start engine.
2.Monitor seat belt warning lamp while fastening and unfastening the driver seat belt buckle.
Seat belt warning lamp


When driver seat belt is fastened: OFF
When driver seat belt is unfastened: ON
Is the inspection result normal?
YES- Inspection End.
NO- Refer to "Diagnosis Procedure" .


Diagnosis Procedure

Regarding Wiring Diagram information, refer to "Wiring Diagram" [1][2]Audible Warning Device.

1. CHECK COMBINATION METER INPUT SIGNAL

1.Turn ignition switch ON.
2.Check voltage between combination meter harness connector M24 terminal 9 and ground.
9 - Ground


When driver seat belt is fastened: Approx. 12V
When driver seat belt is unfastened: Approx. 0V
Is the inspection result normal?
YES- Replace combination meter. Refer to "Removal and Installation" Service and Repair.
NO- GO TO 2

2. CHECK SEAT BELT BUCKLE SWITCH CIRCUIT

1.Turn ignition switch OFF.
2.Disconnect combination meter harness connector M24 and seat belt buckle switch (driver seat) harness connector B221.
3.Check continuity between combination meter harness connector M24 terminal 9 and seat belt buckle switch (driver seat) harness connector B221 terminal 4.
9 - 4: Continuity should exist.
4.Check continuity between combination meter harness connector M24 terminal 9 and ground.
9 - Ground: Continuity should not exist.
Is the inspection result normal?
YES- GO TO 3
NO- Repair or replace harness or connectors.

3. CHECK SEAT BELT BUCKLE SWITCH GROUND CIRCUIT

Check continuity between seat belt buckle switch (driver seat) harness connector B221 terminal 3 and ground.
3 - Ground: Continuity should exist.
Revision: March 20122013 Infiniti JX
Is the inspection result normal?
YES- Inspection End.
NO- Repair or replace harness or connectors.


Component Inspection


1. CHECK SEAT BELT BUCKLE SWITCH

1.Turn ignition switch OFF.
2.Disconnect the seat belt buckle switch (driver seat) connector.
3.Check continuity between the seat belt buckle switch (driver seat) terminals 3 and 4.
3- 4


When seat belt is fastened: Continuity should not exist.
When seat belt is unfastened: Continuity should exist.
Is the inspection result normal?
YES- Inspection End.
NO- Replace the seat belt buckle switch (driver seat). Refer to "Removal and Installation" Service and Repair.
Revision: March 20122013 Infiniti JX