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 CLIMATE CONTROLLED SEAT SWITCH INPUT SIGNAL

Turn ignition switch ON.

Check voltage between climate controlled seat switch harness connector and ground.

(+)			(-)	Condition	Voltage (Approx.)
Climate controlled seat switch				Climate controlled seat switch
Connector		Terminal
LH	M262	8	Ground	HEAT mode	Battery voltage
				OFF	0
		9		COOL mode	Battery voltage
				OFF	0
RH	M263	5		HEAT mode	Battery voltage
				OFF	0
		4		COOL mode	Battery voltage
				OFF	0

Is the inspection result normal?

YES

GO TO 3.

GO TO 2.

CHECK CLIMATE CONTROLLED SEAT SWITCH INDICATOR CIRCUIT

Turn ignition switch OFF.
Disconnect climate controlled seat switch connector and climate controlled seat control unit connector.

Check continuity between climate controlled seat switch harness connector and climate controlled seat control unit harness connector.

Climate controlled seat switch			Climate controlled seat control unit		Continuity
Connector		Terminal	Connector	Terminal
LH	M262	9	B216	9	Yes
		8		10
RH	M263	4	B312	9
		5		10

Check continuity between climate controlled seat switch harness connector and ground.

Climate controlled seat switch			Ground	Continuity
Connector		Terminal
LH	M262	9		No
		8
RH	M263	4
		5

Is the inspection result normal?

YES

Replace climate controlled seat control unit. Refer to Climate Controlled Seat Control Unit .

Repair or replace harness.

CHECK CLIMATE CONTROLLED SEAT SWITCH GROUND CIRCUIT

Turn ignition switch OFF.
Disconnect climate controlled seat switch connector.

Check continuity between climate controlled seat switch harness connector and ground.

Climate controlled seat switch			Ground	Continuity
Connector		Terminal
LH	M262	7		Yes
RH	M263	6

Is the inspection result normal?

YES

Replace climate controlled seat switch. Refer to Climate Controlled Seat Switch .

Repair or replace harness.