Diagnosis Procedure

WARNING: This page is about a different car, the 2018 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.

CHECK LIFTING MOTOR LH (FRONT) POWER SUPPLY

CONSULT

Turn the ignition switch to ACC.
Perform "SEAT LIFTER FR" in "Active Test" mode of "AUTO DRIVE POS".

Check voltage between driver seat control unit harness connector and ground.

(+)		(-)	Condition		Voltage (V) (Approx.)
Driver seat control unit
Connector	Terminal
B223	34	Ground	SEAT LIFTER FR	OFF	0
				UP	Battery voltage
				DWN (down)	0
	42			OFF	0
				UP	0
				DWN (down)	Battery voltage

Is the inspection result normal?

YES

Replace lifting motor LH (front). Refer to Removal and Installation .

GO TO 2.

CHECK LIFTING MOTOR LH (FRONT) CIRCUIT

Turn ignition switch OFF.
Disconnect driver seat control unit and lifting motor LH (front).

Check continuity between driver seat control unit harness connector and lifting motor LH (front) harness connector.

Driver seat control unit		Lifting motor LH (front)		Continuity
Connector	Terminal	Connector	Terminal
B223	34	B227	4	Yes
	42		6

Check continuity between driver seat control unit harness connector and ground.

Driver seat control unit		Ground	Continuity
Connector	Terminal
B223	34		No
	42

Is the inspection result normal?

YES

GO TO 3

Repair or replace harness.

CHECK INTERMITTENT INCIDENT
Refer to Intermittent Incident .

Is the inspection result normal?

YES

Replace driver seat control unit. Refer to Removal and Installation .

NO

Repair or replace the malfunctioning part.