SEAT BELT BUCKLE SWITCH SIGNAL CIRCUIT

Select the “Data Monitor” for the “METER/M&A” and check the “BUCKLE SW” monitor value.

BUCKLE SW
When seat belt is fastened	: Off
When seat belt is unfastened	: On

>>INSPECTION END

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

   Terminals			Condition	Voltage (Approx.)
   (+)		(-)
   Combination meter		Ground
   Connector	Terminal
   M53	30		When seat belt is fastened	12 V
   			When seat belt is unfastened	0 V

   
   

YES>>Replace combination meter

NO>>GO TO 2.

1. Turn ignition switch OFF.
2. Disconnect combination meter connector and seat belt buckle switch (driver side) connector.
3. Check continuity between combination meter harness connector terminal and seat belt buckle switch (driver side) harness connector terminal.
   

   Terminals				Continuity
   (+)		(-)
   Combination meter		Seat belt buckle switch (driver side)
   Connector	Terminal	Connector	Terminal
   M53	30	B12	3	Exist

   
   
4. Check harness continuity between combination meter harness connector terminal and ground.
   

   Terminals			Continuity
   (+)		(-)
   Combination meter		Ground
   Connector	Terminal
   M53	30		Not existed

   
   

YES>>GO TO 3.

NO>>Repair harness or connector.

Check harness continuity between seat belt buckle switch (driver side) harness connector terminal and ground.

Terminals			Continuity
(+)		(-)
Combination meter		Ground
Connector	Terminal
B12	2		Exist

YES>>INSPECTION END

NO>>Repair harness or connector.

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

   Seat belt buckle switch (driver side)		Condition	Continuity
   3	2	When seat belt (driver side) is fastened	Not existed
   		When seat belt (driver side) is unfastened	Exist

   
   

YES>>INSPECTION END

NO>>Replace the seat belt buckle. Refer to Removal and Installation.