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 ACCESSORY RELAY-1 AND ACCESSORY RELAY-2 CONTROL SIGNAL VOLTAGE

Remove accessory relay-1 and disconnect accessory relay-2.

Check voltage between accessory relay-1 connector J-3 and ground.

Accessory relay-1		Ground	Condition	Voltage (Approx.)
Connector	Terminal
J-3	2	-	Ignition: OFF	0V
			Ignition: ACC	Battery voltage

Check voltage between accessory relay-2 connector M169 and ground.

Accessory relay-2		Ground	Condition	Voltage (Approx.)
Connector	Terminal
M169	1	-	Ignition: OFF	0V
			Ignition: ACC	Battery voltage

Is the inspection result normal?

YES

GO TO 3

GO TO 2

CHECK ACCESSORY RELAY-1 AND ACCESSORY RELAY-2 CONTROL SIGNAL CIRCUIT

Turn ignition switch OFF.
Disconnect BCM connector M18.

Check continuity between BCM connector M18 and accessory relay-1 connector J-3.

BCM		Accessory relay-1		Continuity
Connector	Terminal	Connector	Terminal	Continuity
M18	113	J-3	2	Yes

Check continuity between BCM connector M18 and accessory relay-2 connector M169.

BCM		Accessory relay-2		Continuity
Connector	Terminal	Connector	Terminal	Continuity
M18	113	M169	1	Yes

Check continuity between BCM connector M18 and ground.

BCM		Ground	Continuity
Connector	Terminal
M18	113	-	No

Is the inspection result normal?

YES

Replace BCM. Refer to Removal and Installation .

Repair or replace harness or connectors.

CHECK ACCESSORY RELAY-1 AND ACCESSORY RELAY-2 GROUND CIRCUIT

Turn ignition switch OFF.

Check continuity between accessory relay-1 connector J-3 and ground.

Accessory relay-1		Ground	Continuity
Connector	Terminal
J-3	1	-	Yes

Check continuity between accessory relay-2 connector M169 and ground.

Accessory relay-2		Ground	Continuity
Connector	Terminal
M169	2	-	Yes

Is the inspection result normal?

YES

Replace accessory relay.

Repair or replace harness or connectors.