Front Lifting Switch 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 FUNCTION

With CONSULT-II

With "LIFT FR SW-UP, LIFT FR SW-DN" on the DATA MONITOR, operate the front lifting switch to check ON/OFF operation.

LIFT FR MONITOR ITEM CHART

Monitor item [OPERATION or UNIT]		Contents
LIFT FR SW-DN	"ON/OFF"	ON/OFF status judged from the FR lifting switch (DOWN) signal is displayed.
LIFT RR SW-UP	"ON/OFF"	ON/OFF status judged from the RR lifting switch (UP) signal is displayed.

Fig 1: CONSULT-II Display - DATA MONITOR

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

Without CONSULT-II

Turn ignition switch OFF.

Check voltage between driver seat control unit connector and ground.

DRIVER SEAT CONTROL UNIT CONNECTOR AND GROUND

Connector	Terminals		Condition	Voltage (V) (Approx.)
Connector	(+)	(-)	Condition	Voltage (V) (Approx.)
B401	13	Ground	Front lifting switch ON (DOWN operation)	0
	13		Other than above	Battery voltage
	28		Front lifting switch ON (UP operation)	0
	28		Other than above	Battery voltage

Fig 2: Checking Voltage Between Driver Seat Control Unit Connector And Ground

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

OK or NG

OK: Front lifting switch circuit is OK.

NG: GO TO 2.

CHECK POWER SEAT SWITCH HARNESS CONTINUITY
1. Disconnect driver seat control unit and power seat switch LH.
2. Check continuity between driver seat control unit connector B401 (A) terminals 13, 28 and power seat switch LH connector B408 (B) terminals 9,10.
  13 - 9: Continuity should exist.
  
  28 - 10: Continuity should exist.
3. Check continuity between driver seat control unit connector B401 (A) terminals 13, 28 and ground
  13 - Ground: Continuity should not exist.
  
  28 - Ground: Continuity should not exist.
Fig 3: Checking Continuity Between Driver Seat Control Unit Terminals And Power Seat Switch LH Terminals
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG

OK: GO TO 3.

NG: Repair or replace harness.

CHECK FRONT LIFTING SWITCH

Check continuity between power seat switch LH terminals as follows.

FRONT LIFTING SWITCH

Terminal		Condition	Continuity
9	7	Front lifting switch ON (UP operation)	Yes
9		Other than above	No
10		Front lifting switch ON (DOWN operation)	Yes
10		Other than above	No

Fig 4: Checking Continuity Between Power Seat Switch LH Terminals

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

OK or NG

OK: Check the condition of the harness and connector.

NG: Replace power seat switch LH. Refer to "FRONT SEAT ".