Diagnosis Procedure

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 REAR SEATBACK SWITCH (DRIVER SIDE) GROUND CIRCUIT

Turn the ignition switch OFF.
Disconnect rear seatback switch (driver side) connector.
Check continuity between rear seatback switch (driver side) harness connector and ground.

Rear seatback switch (driver side)		Ground	Continuity
Connector	Terminal
B90	6		Yes

Is the inspection result normal?

YES

GO TO 2.

Repair or replace harness.

CHECK REAR SEATBACK SWITCH (DRIVER SIDE) RETURN SIGNAL

Check voltage between rear seatback switch (driver side) harness connector and ground.

(+)		(-)	Voltage (V)
Rear seatback switch (driver side)
Connector	Terminal
B90	9	Ground	4.7 - 5.3

Is the inspection result normal?

YES

GO TO 4.

GO TO 3.

CHECK REAR SEATBACK SWITCH (DRIVER SIDE) CIRCUIT

Disconnect seatback power return control unit connector B414.

Check continuity between seatback power return control unit harness connector and rear seatback switch (driver side) harness connector.

Seatback power return control unit		Rear seatback switch (driver side)		Continuity
Connector	Terminal	Connector	Terminal	Continuity
B414	29	B90	9	Yes

Check continuity between seatback power return control unit harness connector and ground.

Seatback power return control unit		Ground	Continuity
Connector	Terminal
B414	29		No

Is the inspection result normal?

YES

Replace seatback power return control unit. Refer to Removal and Installation .

Repair or replace harness.

CHECK REAR SEATBACK SWITCH (DRIVER SIDE)
Check rear seatback switch (driver side).

Refer to Component Inspection .

Is the inspection result normal?

YES

GO TO 5.

NO

Replace rear seatback switch (driver side). Refer to Removal and Installation .
CHECK INTERMITTENT INCIDENT
Refer to Intermittent Incident .

Inspection End.