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Lumber Support Circuit Inspection

CHECK LUMBER SUPPORT SWITCH
1. Turn ignition switch OFF.
2. Disconnect l "memory switch and lumber support switch" connector.
3. Check voltage between l "memory switch and lumber support switch" connector B158 terminal 1 (R) and ground.
  1 (R) - Ground: Battery voltage
  
  Fig 1: Checking Lumber Support Switch
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: GO TO 2.
2. NG: Repair or replace harness between fuse block (J/B) and l "memory switch and lumber support switch".

CHECK LUMBER SUPPORT SWITCH

Check continuity power seat switch.

TERMINAL CONTINUITY

Connector	Terminal (Wire color)		Condition	Continuity
Connector	(+)	(-)	Condition	Continuity
B158	31 (W)	1 (R)	Lumber support switch backward.	Yes
	31 (W)	16B (B)	Lumber support switch forward.	No
	32 (L)	1 (R)	Lumber support switch forward.	Yes
	32 (L)	16B (B)	Lumber support switch backward.	No

Fig 2: Checking Lumber Support Switch

G03107703

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

OK or NG

OK: GO TO 3.
NG: Replace power seat switch.

CHECK LUMBER SUPPORT MOTOR HARNESS
1. Disconnect lumber support motor connector.
2. Check continuity between l "memory switch and lumber support switch" connector B158 terminal 31 (W), 32 (L) and lumber support motor connector B172 terminal 31 (W), 32 (L).
  31 (W) - 31 (W): Continuity should exist.
  
  32 (L) - 32 (L): Continuity should exist.
3. Check continuity between l "memory switch and lumber support switch" connector B159 terminal 31 (W), 32 (L) and ground.
  31 (W) - Ground: Continuity should not exist.
  
  32 (L) - Ground: Continuity should not exist.
  
  Fig 3: Checking Lumber Support Motor Harness
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: GO TO 4.
2. NG: Repair or replace harness between l "memory switch and lumber support switch" and lumber support motor.
CHECK LUMBER SUPPORT SWITCH GROUND CIRCUIT
Check continuity between lumber support switch connector B158 terminal 16B (B) and ground.

16B (B) - Ground: Continuity should exist.

Fig 4: Checking Lumber Support Switch Ground Circuit
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG
1. OK: Check the condition of the harness and connector.
2. NG: Repair or replace harness between l "memory switch and lumber support switch" and ground.