Nissan Sentra B18 (2020-2025) Service Manual: B1341 Head Unit

Nissan Sentra B18 (2020-2025) Service Manual / Driver Information & Multimedia / Audio, Visual & Navigation System :: Display Audio with Bose with 8" Color Display / Dtc/circuit Diagnosis / B1341 Head Unit

Dtc Description

DTC Description

DTC DETECTION LOGIC

DTC No.	CONSULT screen terms (Trouble diagnosis content)		DTC detection condition
B1341–16	Head unit (AV control unit)	[VB–LOW]	Diagnosis condition	When ignition switch is ON.
			Signal (terminal)	–
			Threshold	–
			Diagnosis delay time	30 seconds or more
B1341–17		[VB–HIGH]	Diagnosis condition	When ignition switch is ON.
			Signal (terminal)	–
			Threshold	–
			Diagnosis delay time	30 seconds or more
B1341–49		[—]	Diagnosis condition	When ignition switch is ON.
			Signal (terminal)	–
			Threshold	–
			Diagnosis delay time	30 seconds or more
B1341–55		[CONFIG]	Diagnosis condition	When ignition switch is ON.
			Signal (terminal)	–
			Threshold	–
			Diagnosis delay time	30 seconds or more
B1341–98		[TEMP]	Diagnosis condition	When ignition switch is ON.
			Signal (terminal)	–
			Threshold	–
			Diagnosis delay time	30 seconds or more

POSSIBLE CAUSE

Charging system malfunction
AV control unit configuration
AV control unit

FAIL-SAFE

Failure type byte 16: Battery protection shuts AV control unit down 60 seconds after low voltage condition
Failure type byte 17:
- AV control unit display inoperative
- Audio output is inoperative
Failure type byte 49: AV control unit internal failure
Failure type byte 55: AV control unit configuration error
Failure type byte 98: AV control unit shuts down after 5 seconds

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 B1341 detected?
YES>>
Refer 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 B1341–16, 17, 49, 55 or 98 detected?
YES >>
16 [VB–LOW], or 17 [VB–HIGH] – GO TO 2.
YES >>
49 [—] – GO TO 4.
YES >>
55 [CONFIG] – GO TO 3.
YES >>
98 [TEMP] – GO TO 5.
NO >>
Refer to Intermittent Incident.
CHECK CHARGING SYSTEM
1. Charge battery and retest. Refer to Work Flow (With 165-DSS-5000P) or Work Flow (Without 165-DSS-5000P).
Is charging system OK?
YES >>
Replace AV control unit. Refer to Removal and Installation.
NO >>
Repair charging system malfunction.
PERFORM CONFIGURATION PROCEDURE
1. Perform configuration of AV control unit. Refer to Work Procedure.
>>
GO TO 4.
PERFORM DTC CONFIRMATION PROCEDURE AGAIN
1. CONSULT
  1. Ignition switch ON.
  2. Erase DTC.
  3. Perform DTC confirmation procedure again. Refer to DTC Confirmation Procedure.
Is DTC U1341 detected again?
YES >>
Replace AV control unit. Refer to Removal and Installation.
NO >>
Inspection End.
CHECK AV CONTROL UNIT
1. Visually check around AV control unit for a cause of high temperature.
Is the inspection result normal?
YES >>
GO TO 6.
NO >>
Remove cause of high temperature.
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 B1341 detected?
YES >>
Replace AV control unit. Refer to Removal and Installation.
NO >>
Inspection End.

B133a Avm Connection

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

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