Front Lifting Motor Circuit Inspection

WARNING: This page is about a different car, the 2007 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FRONT SEAT LIFTING MECHANISM
Check the following.
- Operation malfunction caused by lifting mechanism deformation or pinched harness or other foreign materials
- Operation malfunction caused by foreign materials adhered to the lifting 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.

SEAT LIFTER FR TEST ITEM DESCRIPTION

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

Without CONSULT-II

GO TO 3.

Fig 1: CONSULT-II Display - ACTIVE TEST

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

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 B402 (A) terminals 37, 45 and front lifting motor connector B406 (A) terminals 1, 3.
  37 - 1: Continuity should exist.
  
  45 - 3: Continuity should exist.
4. Check continuity between driver seat control unit connector B402 (A) terminals 37, 45 and ground.
  37 - Ground: Continuity should not exist.
  
  45 - Ground: Continuity should not exist.
Fig 2: Checking Front Lifting Motor Harness Continuity
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG

OK: GO TO 4.

NG: Repair or replace harness.

CHECK DRIVER SEAT CONTROL UNIT OUTPUT SIGNAL

Connect the driver seat control unit and front lifting motor.

Check voltage between driver seat control unit connector and ground.

Fig 3: Checking Voltage Between Driver Seat Control Unit Connector And Ground

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

DRIVER SEAT CONTROL UNIT OUTPUT SIGNAL

Connector	Terminals		Condition	Voltage (V) (Approx.)
Connector	(+)	(-)	Condition	Voltage (V) (Approx.)
B402	45	Ground	Front lifting switch ON (UP operation)	Battery voltage
	45		Other than above	0
	37		Front lifting switch ON (DOWN operation)	Battery voltage
	37		Other than above	0

OK or NG

OK: Replace front lifting motor. Refer to "FRONT SEAT ".

NG: Replace driver seat control unit. Refer to "FRONT SEAT ".