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 SEATBACK ANGLE LIMIT SWITCH (DRIVER SIDE) INPUT SIGNAL

Turn the ignition switch OFF.
Disconnect seatback angle limit switch (driver side) connector.
Check voltage between seatback angle limit switch (driver side) harness connector and ground.

(+)		(-)	Voltage (V)
Seatback angle limit switch (driver side)
Connector	Terminal
B421	1	Ground	Battery voltage

NOTE: It is not low power consumption mode.

Is the inspection result normal?

YES

GO TO 3.

GO TO 2.

CHECK SEATBACK ANGLE LIMIT SWITCH (DRIVER SIDE) CIRCUIT

Disconnect seatback power return control unit connector B414.

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

Seatback power return control unit		Seatback angle limit switch (driver side)		Continuity
Connector	Terminal	Connector	Terminal	Continuity
B414	28	B421	1	Yes

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

Seatback power return control unit		Ground	Continuity
Connector	Terminal
B414	28		No

Is the inspection result normal?

YES

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

Repair or replace harness.

CHECK SEATBACK ANGLE LIMIT SWITCH (DRIVER SIDE) GROUND CIRCUIT

Disconnect seatback power return control unit connector B414 and sector gear position limit switch (driver side) connector.

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

Seatback power return control unit		Seatback angle limit switch (driver side)		Continuity
Connector	Terminal	Connector	Terminal	Continuity
B414	26	B421	2	Yes

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

Seatback power return control unit		Ground	Continuity
Connector	Terminal
B414	26		No

Is the inspection result normal?

YES

GO TO 4.

Repair or replace harness.

CHECK SEATBACK ANGLE LIMIT SWITCH (DRIVER SIDE)
Check seatback angle limit switch (driver side).

Refer to Component Inspection .

Is the inspection result normal?

YES

GO TO 5.

NO

Replace seatback angle limit switch (driver side). Refer to Exploded View .
CHECK INTERMITTENT INCIDENT
Refer to Intermittent Incident .

Inspection End.