Automatic Drive Positioner (DTC/Circuit Diagnosis)

WARNING: This page is about a different car, the 2020 Infiniti QX60. However, it is still accessible from the selected car via links, so may be relevant.

CHECK RECLINING SWITCH SIGNAL

Turn ignition switch OFF.
Check voltage between driver seat control unit harness connector and ground.

(+)		(-)	Condition		Voltage (V) (Approx.)
Driver seat control unit
Connector	Terminals
B209	24	Ground	Reclining switch	Operate (forward)	0
				Release	Battery voltage
	8			Operate (backward)	0
				Release	Battery voltage

Is the inspection result normal?

YES

GO TO 5.

GO TO 2.

CHECK RECLINING SWITCH CIRCUIT

Turn ignition switch OFF.
Disconnect driver seat control unit and power seat switch LH.

Check continuity between driver seat control unit harness connector and power seat switch LH harness connector.

Driver seat control unit		Power seat switch LH connector		Continuity
Connector	Terminal	Connector	Terminal
B209	24	B208	9	Yes
	8		10

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

Driver seat control unit		Ground	Continuity
Connector	Terminal
B209	24		No
	8

Is the inspection result normal?

YES

GO TO 3.

Repair or replace harness.

CHECK DRIVER SEAT CONTROL UNIT OUTPUT

Connect the driver seat control unit.
Turn ignition switch ON.
Check voltage between driver seat control unit harness connector and ground.

(+)		(-)	Voltage (V) (Approx.)
Driver seat control unit
Connector	Terminals
B209	8	Ground	Battery voltage
	24

Is the inspection result normal?

YES

GO TO 4.

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

CHECK RECLINING SWITCH
Refer to Component Inspection .

Is the inspection result normal?

YES

GO TO 5.

NO

Replace power seat switch LH. Refer to Removal and Installation .
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.