Nissan Sentra B18 (2020-2025) Service Manual: B1328 External Microphone 1

Nissan Sentra B18 (2020-2025) Service Manual / Driver Information & Multimedia / Audio, Visual & Navigation System :: Display Audio Without Bose with 8" Color Display / Dtc/circuit Diagnosis / B1328 External Microphone 1

Dtc Description

DTC Description

DTC DETECTION LOGIC

DTC No.	CONSULT screen terms (Trouble diagnosis content)		DTC detection condition
B1328–13	External Microphone 1 (Microphone)	[OPEN]	Diagnosis condition	When ignition switch is ON.
			Signal (terminal)	—
			Threshold	–
			Diagnosis delay time	30 seconds or more
B1328–11		[GND–SHORT]	Diagnosis condition	When ignition switch is ON.
			Signal (terminal)	—
			Threshold	–
			Diagnosis delay time	30 seconds or more
B1328–12		[VB–SHOR]	Diagnosis condition	When ignition switch is ON.
			Signal (terminal)	—
			Threshold	–
			Diagnosis delay time	30 seconds or more

POSSIBLE CAUSE

Microphone is not connected
Harness or connector
Microphone

FAIL-SAFE

Microphone is inoperative

Dtc Confirmation Procedure

DTC Confirmation Procedure

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 B1328 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

DETERMINE MALFUNCTION TYPE
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 B1328–11, 12 or 13 detected?
YES>>
13 [OPEN], or 11 [GND-SHORT] – GO TO 2.
YES>>
12 [VB–SHOR] – GO TO 3.
NO>>
Refer to Intermittent Incident.

CHECK MICROPHONE CIRCUITS FOR OPEN OR SHORT TO GROUND

Ignition switch OFF.
Disconnect AV control unit connector and microphone connector.

Check the continuity between AV control unit connector and microphone connector.

AV control unit		Microphone		Continuity
Connector	Terminal	Connector	Terminal	Continuity
M104	21	R17	1	Yes
	22		4
	42		2
	50		5

Check the continuity between AV control unit connector and ground.

AV control unit		—	Continuity
Connector	Terminal	—	Continuity
M104	21	Ground	Yes
	22
	50

Is the inspection result normal?

YES >>

Replace microphone. Refer to Removal and Installation.

NO >>

Repair or replace harness or connectors.

CHECK MICROPHONE CIRCUITS FOR SHORT TO POWER SUPPLY

Ignition switch OFF.
Disconnect AV control unit connector and microphone connector.
Ignition switch ON.

Check the voltage between AV control unit connector and ground.

AV control unit		(−)	Voltage (Approx.)
(+)
Connector	Terminal
M104	21	Ground	0 V
	22
	42
	50

Is the inspection result normal?

YES >>

Replace microphone. Refer to Removal and Installation.

NO >>

Repair or replace harness or connectors.

B132a External Usb

Dtc Description DTC Description DTC DETECTION LOGIC DTC No. CONSULT screen terms ...

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