Nissan Sentra B18 (2020-2025) Service Manual: B1315 Am/fm 1 Antenna

Dtc Description

DTC Description

DTC DETECTION LOGIC

DTC DETECTION LOGIC

DTC No.	CONSULT screen terms (Trouble diagnosis content)		DTC detection condition
B1315–13	AM/FM 1 antenna (Radio antenna)	[OPEN]	Diagnosis condition	When ignition switch is ON.
			Signal (terminal)	ANT +B circuit between AV control unit and antenna base (terminal 67)
			Threshold	–
			Diagnosis delay time	30 seconds or more
B1315–11		[GND–SHORT]	Diagnosis condition	When ignition switch is ON.
			Signal (terminal)	ANT +B circuit between AV control unit and antenna base (terminal 67)
			Threshold	–
			Diagnosis delay time	30 seconds or more

POSSIBLE CAUSE

• Radio antenna is not connected

• Harness or connector (ANT +B circuit is open or short to ground)

FAIL-SAFE

No AM/FM radio reception

Dtc Confirmation Procedure

DTC Confirmation Procedure

1. PERFORM DTC CONFIRMATION PROCEDURE

   1. CONSULT

      1. Ignition switch ON.

      2. Ignition switch OFF and wait at least 30 seconds.

      3. Ignition switch ON and wait at least 30 seconds or more.

      4. Select “Self Diagnostic Result” mode of “MULTI AV”.

      5. Check DTC.

   Is DTC B1315 detected?

   YES>>

   Proceed to DTC Diagnosis Procedure.

   NO>>

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

   NO>>

   Confirmation after repair: Inspection End.

Diagnosis Procedure

Diagnosis Procedure

1. CHECK ANTENNA CONNECTOR

   1. 1. Ignition switch OFF.

      2. Visually inspect window antenna, antenna amp., antenna feeder and antenna connectors.

   Is the inspection result normal?

   YES>>

   GO TO 2.

   NO>>

   Repair or replace malfunctioning parts.

2. CHECK ANTENNA CIRCUIT CONTINUITY

   1. 1. Ignition switch OFF.

      2. Disconnect AV control unit connector and antenna amp. connector.

      3. Check continuity between AV control unit connector and antenna amp. connector.

         AV control unit		Antenna amp.		Continuity
         Connector	Terminal	Connector	Terminal
         M115	67	R153	2	Yes

      4. Check continuity between AV control unit connector and ground.

         AV control unit		—	Continuity
         Connector	Terminal
         M115	67	Ground	No

   Is the inspection result normal?

   YES>>

   GO TO 3.

   NO>>

   Repair or replace malfunctioning parts.

3. CHECK AV CONTROL UNIT VOLTAGE

   1. 1. Connect AV control unit connector and antenna amp. connector.

      2. Ignition switch ON.

      3. Check the voltage between AV control unit and ground.

         AV control unit		—	Voltage (Approx.)
         Connector	Terminal
         M115	67	Ground	Battery voltage

   Is the inspection result normal?

   YES>>

   Replace antenna amp. Refer to Removal and Installation.

   NO>>

   Replace AV control unit. Refer to Removal and Installation.