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 CLIMATE CONTROLLED SEAT SWITCH INPUT SIGNAL

Turn the ignition switch ON.

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

(+)			(-)	Condition	Voltage (V) (Approx.)
Climate controlled seat switch				Climate controlled seat switch
Connector		Terminal
LH	M203	5	Ground	HEAT mode	Battery voltage
				OFF	0
		4		COOL mode	Battery voltage
				OFF	0
RH	M206	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 the 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	M203	4	B201	18	Yes
		5		5
RH	M206	4	B301	18
		5		15

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

Climate controlled seat switch			Ground	Continuity
Connector		Terminal
LH	M203	4		No
		5
RH	M206	4
		5

Is the inspection result normal?

YES

Replace climate controlled seat control unit. Refer to Exploded View .

Repair or replace harness.

CHECK CLIMATE CONTROLLED SEAT SWITCH GROUND CIRCUIT

Turn the 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	M203	6		Yes
RH	M206

Is the inspection result normal?

YES

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

Repair or replace harness.