Check Front Lifting Motor Circuit

CHECK FRONT 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
- OK : GO TO 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 end lifter motor is activated by receiving the drive signal.

Fig 1: Display CONSULT II - Active Test Screen

G04130127

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

Without CONSULT-II

Perform the on-board diagnosis. Refer to "ON BOARD DIAGNOSIS FOR AUTOMATIC DRIVE POSITIONER ".

OK or NG

OK : System is OK.
NG : GO TO 3.

CHECK 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 B142 and terminals 10, 11 and front lifting motor connector B148 terminals 10, 11.
  10 (OR) - 10 (OR) : Continuity should exist.
  
  11 (P) - 11 (P) : Continuity should exist.
4. Check continuity between driver seat control unit connector B142 and terminals 10, 11 and ground.
  10 (OR) - Ground : Continuity should not exist.
  
  11 (P) - Ground : Continuity should not exist.
OK or NG
- OK : GO TO 4.
- NG : Repair or replace harness between driver seat control unit and front lifting motor.
  
  Fig 2: Identifying Continuity Between Driver Seat Control Unit Connector B142 And Terminals 10, 11 And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.

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.

CONNECTORS VOLTAGE REFERENCE

Connector	Terminals (Wire color)		Condition	Voltage (V) (Approx.)
Connector	(+)	(-)	Condition	Voltage (V) (Approx.)
B142	10 (OR)	Ground	Front end lifting switch (DOWN operation)	Battery voltage
	10 (OR)		Front end lifting switch OFF	0
	11 (P)		Front end lifting switch (UP operation)	Battery voltage
	11 (P)		Front end lifting switch OFF	0

Fig 3: Identifying Voltage Between Driver Seat Control Unit Connector

G04130129

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

OK or NG

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