Lumber Support Circuit Check

1. CHECK LUMBER SUPPORT SWITCH 
   1. Turn ignition switch OFF.
   2. Disconnect lumber support switch connector.
   3. Check voltage between lumber support switch connector and ground.
   LUMBER SUPPORT SWITCH CONNECTOR AND GROUND VOLTAGE
   
   

   Terminals			Voltage (V) (Approx.)
   (+)		(-)
   Lumbar support switch connector	Terminal
   B212	55	Ground	Battery voltage

   Fig 1: Identifying Voltage Between Lumber Support Switch Connector And Ground

   Courtesy of NISSAN MOTOR CO., U.S.A.

   OK or NG 

   OK: GO TO 2.

   NG: Repair or replace harness between fuse block (J/B) and lumber support switch.

2. CHECK LUMBER SUPPORT SWITCH 

   Check continuity lumber support switch connector.

   LUMBER SUPPORT SWITCH CONNECTOR CONTINUITY
   
   

   Lumbar support switch	Terminal		Condition of lumbar support switch	Continuity
   B212	55	57	FORWARD	Yes
   			Other than above	No
   		58	BACKWARD	Yes
   			Other than above	No
   	56	57	FORWARD	No
   			Other than above	Yes
   		58	BACKWARD	No
   			Other than above	Yes

   Fig 2: Identifying Continuity Lumber Support Switch Connector

   Courtesy of NISSAN MOTOR CO., U.S.A.

   OK or NG 

   OK: GO TO 3.

   NG: Replace lumber support switch.

3. CHECK LUMBER SUPPORT MOTOR HARNESS 
   1. Disconnect lumber support motor connector.
   2. Check continuity between lumber support switch connector and lumber support motor connector.
      LUMBER SUPPORT SWITCH CONNECTOR AND LUMBER SUPPORT MOTOR CONNECTOR CONTINUITY
      
      

      A		B		Continuity
      Lumbar support switch connector	Terminal	Lumbar support motor connector	Terminal
      B212	57	B211	57	Yes
      	58		58

   3. Check continuity between lumber support switch connector and ground.
      LUMBER SUPPORT SWITCH CONNECTOR AND GROUND CONTINUITY
      
      

      A		Ground	Continuity
      Lumbar support switch connector	Terminal
      B212	57		No
      	58

      Fig 3: Identifying Continuity Between Lumber Support Switch Connector And Lumber Support Motor Connector

      Courtesy of NISSAN MOTOR CO., U.S.A.

   OK or NG 

   OK: GO TO 4.

   NG: Repair or replace harness.

4. CHECK LUMBER SUPPORT SWITCH GROUND CIRCUIT 

   Check continuity between lumber support switch connector and ground.

   LUMBER SUPPORT SWITCH CONNECTOR AND GROUND CONTINUITY
   
   

   Lumbar support switch connector	Terminal	Ground	Continuity
   B212	56		Yes

   Fig 4: Identifying Continuity Between Lumber Support Switch Connector And Ground

   Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG 

OK: Check the condition of the harness and connector.

NG: Repair or replace harness between lumber support switch and ground.