Nissan Murano: Dtc/circuit Diagnosis / B130d Tel Line Out Error

DTC Description

DTC DETECTION LOGIC

POSSIBLE CAUSE

• Sound signal circuits between TCU and AV control unit

• TCU

• AV control unit

FAIL-SAFE

Telematics system function stops

PERFORM DTC CONFIRMATION PROCEDURE

CONSULT

1. Ignition switch ON.

2. Erase DTC.

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

4. Check DTC.

Is DTC U130D detected?

Proceed to DTC Diagnosis Procedure.

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

Confirmation after repair: Inspection End.

CHECK CONTINUITY BETWEEN TCU AND AV CONTROL UNIT CIRCUIT

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
   M126	31	M162	32	Yes
   	32		52

4. Check continuity between TCU connector and ground.

   TCU		Ground	Continuity
   Connector	Terminal
   M126	31		No
   	32

Is the inspection result normal?

GO TO 2.

Repair or replace harness or connectors.

CHECK SOUND SIGNAL

1. Connect TCU connector and AV control unit connector.

2. Ignition switch ON.

3. Check signal between the terminals of TCU connector.

   TCU			Condition	Reference value
   Connector	(+)	(−)
   	Terminal
   M126	31	32	When interior sound is input

Is the inspection result normal?

Replace TCU. Refer to Removal and Installation.

Replace AV control unit. Refer to Removal and Installation.