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Nissan Sentra B18 (2020-2025) Service Manual: 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

  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 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

  1. 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.

  2. 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.

  3. PERFORM CONFIGURATION PROCEDURE

    1. Perform configuration of AV control unit. Refer to Work Procedure.

    >>

    GO TO 4.

  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.

  5. 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.

  6. 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.

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