Diagnosis Procedure

WARNING: This page is about a different car, the 2018 Nissan Titan XD and 2018 Nissan Titan. However, it is still accessible from the selected car via links, so may be relevant.

CHECK AXLE DISCONNECT DEVICE ACTUATOR RELAY CIRCUIT

Turn the ignition switch OFF.
Disconnect axle disconnect device actuator harness connector.

Check the voltage between axle disconnect device actuator harness connector and ground.

+		-	Voltage (Approx.)
Axle disconnect device actuator
Connector	Terminal
E251	1	Ground	0 V

Is the inspection result normal?

YES

GO TO 2 .

Perform the trouble diagnosis for axle disconnect device relay circuit. Refer to Diagnosis Procedure .

CHECK AXLE DISCONNECT DEVICE ACTUATOR POWER SUPPLY CIRCUIT

Turn the ignition switch OFF.
Disconnect axle disconnect device relay harness connector.

Check the continuity between axle disconnect device actuator harness connector and axle disconnect device relay harness connector.

Axle disconnect device actuator		Axle disconnect device relay		Continuity
Connector	Terminal	Connector	Terminal	Continuity
E251	1	E36	5	Yes

Check the continuity between axle disconnect device relay harness connector and the ground.

Axle disconnect device relay		-	Continuity
Connector	Terminal
E36	5	Ground	No

Is the inspection result normal?

YES

GO TO 3 .

Repair or replace error-detected parts.

CHECK HARNESS BETWEEN TRANSFER CONTROL UNIT AND AXLE DISCONNECT DEVICE ACTUATOR

Disconnect transfer control unit harness connector.

Check the continuity between transfer control unit harness connector and axle disconnect device actuator harness connector.

Transfer control unit		Axle disconnect device actuator		Continuity
Connector	Terminal	Connector	Terminal	Continuity
E142	26	E251	2	Yes

Check the continuity between transfer control unit harness connector and the ground.

Transfer control unit		-	Continuity
Connector	Terminal
E142	26	Ground	No

Is the inspection result normal?

YES

GO TO 4 .

Repair or replace error-detected parts.

CHECK AXLE DISCONNECT DEVICE ACTUATOR GROUND

Check the continuity between axle disconnect device actuator harness connector and ground.

Axle disconnect device actuator		-	Continuity
Connector	Terminal
E251	4	Ground	Yes

Is the inspection result normal?

YES

GO TO 5 .

Repair or replace error-detected parts.

PERFORM SELF-DIAGNOSIS
After connecting each harness connector, perform DTC confirmation procedure again. Refer to DTC Description .

Is DTC "P186B" detected again?

YES

Replace transfer control unit. Refer to Removal and Installation .

NO

Inspection End.