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Front Lifting Motor Circuit Inspection

CHECK FRONT END SEAT LIFTING MECHANISM
Check the following.
- Operation malfunction caused by lifter mechanism deformation or pinched harness or other foreign materials
- Operation malfunction caused by foreign materials adhered to the lifter motor or lead screws
- Operation malfunction and interference with other parts by installation
OK or NG
1. OK: GO TO 2.
2. NG: Repair the malfunctioning part and check again.

CHECK FUNCTION

With CONSULT-II

Check operation with "SEAT LIFTER FR" in ACTIVE TEST.

TEST ITEM DESCRIPTION

Test item	Description
SEAT LIFTER FR	The front lifting motor is activated by receiving the drive signal.

Fig 1: CONSULT-II Display - SEAT LIFTER FR In ACTIVE TEST

G03107583

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

Without CONSULT-II

GO TO 3.

OK or NG

OK: Front lifting motor circuit is OK.
NG: GO TO 3.

CHECK FRONT LIFTING MOTOR HARNESS CONTINUITY
1. Turn ignition switch OFF.
2. Disconnect driver seat control unit connector and front lifting motor connector.
3. Check continuity between driver seat control unit connector B153 and terminals 5 (LG), 13 (Y) and front lifting motor connector B164 terminals 5 (LG), 13 (Y).
  5 (LG) - 5 (LG): Continuity should exist.
  
  13 (Y) - 13 (Y): Continuity should exist.
4. Check continuity between driver seat control unit connector B153 and terminals 5 (LG), 13 (Y) and ground.
  
  Fig 2: Checking Front Lifting Motor Harness Continuity
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  5 (LG) - Ground: Continuity should not exist.
  
  13 (Y) - Ground: Continuity should not exist.
OK or NG
1. OK: GO TO 4.
2. NG: Repair or replace harness between driver seat control unit and front lifting motor.

CHECK DRIVER SEAT CONTROL UNIT OUTPUT SIGNAL

Connect the driver seat control unit connector and front lifting motor connector.
Check voltage between driver seat control unit connector and ground.

Fig 3: Checking Driver Seat Control Unit Output Signal
Courtesy of NISSAN MOTOR CO., U.S.A.

TERMINAL VOLTAGE

Connector	Terminals (Wire color)		Condition	Voltage (V) (Approx.)
Connector	(+)	(-)	Condition	Voltage (V) (Approx.)
B153	5(LG)	Ground	Front lifting switch ON (DOWN operation)	Battery voltage
	5(LG)		Front lifting switch OFF	0
	13(Y)		Front lifting switch ON (UP operation)	Battery voltage
	13(Y)		Front lifting switch OFF	0

OK or NG

OK: Replace front lifting motor.
NG: Replace driver seat control unit.