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 RELAY
Check axle disconnect device relay. Refer to Component Inspection .

Is the inspection result normal?

YES

GO TO 2

NO

Axle disconnect device relay is malfunctioning. Replace axle disconnect device relay. Refer to Component Parts Location .

CHECK AXLE DISCONNECT DEVICE RELAY POWER SUPPLY CIRCUIT

Turn the ignition switch OFF.

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

+		-	Voltage (Approx.)
Axle disconnect device relay
Connector	Terminal
E36	2	Ground	Battery voltage
	3

Turn the ignition switch ON.
CAUTION: Never start the engine.

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

+		-	Voltage (Approx.)
Axle disconnect device relay
Connector	Terminal
E36	2	Ground	Battery voltage
	3

Is the inspection result normal?

YES

GO TO 4 .

GO TO 3 .

CHECK POWER SUPPLY CIRCUIT
1. Turn the ignition switch OFF.
2. Check the 30A fusible link (#Y).
3. Check the harness for open or short between axle disconnect device relay harness connector No. 2 and No. 3 terminals and the 30A fusible link (#Y).
Is the inspection result normal?

YES

Perform the trouble diagnosis for power supply circuit. Refer to the appropriate Wiring Diagram .

NO

Repair or replace error-detected parts.

CHECK HARNESS BETWEEN TRANSFER CONTROL UNIT AND AXLE DISCONNECT DEVICE RELAY

Disconnect transfer control unit harness connector.

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

Transfer control unit		Axle disconnect device relay		Continuity
Connector	Terminal	Connector	Terminal	Continuity
E142	8	E36	1	Yes

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

Transfer control unit		-	Continuity
Connector	Terminal
E142	8	Ground	No

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 "P1869" detected again?

YES

Replace transfer control unit. Refer to Removal and Installation .

NO

Inspection End.