Nissan Murano: Dtc/circuit Diagnosis / U1a05 Usb Comm

DTC Description

DTC DETECTION LOGIC

POSSIBLE CAUSE

• USB harness

• TCU

FAIL-SAFE

—

PERFORM DTC CONFIRMATION PROCEDURE

CONSULT

1. Ignition switch ON.

2. Select “Self Diagnostic Result” mode of “TELEMATICS”.

3. Check DTC.

Is DTC U1A05 detected?

Proceed to DTC Diagnosis Procedure.

To check malfunction symptom before repair: Refer to Intermittent Incident.

Confirmation after repair: Inspection End.

CHECK USB CIRCUITS CONTINUITY

1. Ignition switch OFF.

2. Disconnect TCU connector and AV control unit connector.

3. Check continuity between TCU connector and AV control unit connector.

   TCU		AV control unit		Continuity
   Connector	Terminal	Connector	Terminal
   M127	41	M169	76	Yes
   	43		78
   	44		79
   	45		80
   	46		81

4. Check the continuity between TCU connector and ground.

   TCU		Ground	Continuity
   Connector	Terminal
   M127	41	—	No
   	44

Is the inspection result normal?

Replace TCU. Refer to Removal and Installation.

Repair or replace harness or connectors.