S Nissan Sentra Manuals Library
Factory-style information for owners and repair work

Nissan Sentra techinfo

Find Nissan Sentra owner information, maintenance instructions, technical references, service procedures and useful repair pages in one clean online library.

Quick access Sentra Docs
B18 Owner's 2020-2025 Sentra owner information B18 Service 2020-2025 Sentra Workshop manual B17 Owner's 2013-2019 Sentra owner documentation B17 Service 2013-2019 Sentra service information

Nissan Sentra B18 (2020-2025) Service Manual: B24d4-08 A/c Control Comm

Dtc Description

DTC Description

DTC DETECTION LOGIC

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detection condition

B24D4-08

A/C CONTROL COMM

(A/C control communication)

Diagnosis condition

Ignition switch ON

Signal (Terminal)

LIN (A/C control) signal

Threshold

Receive internal circuit error message via A/C switch assembly to LIN communication

Diagnosis delay time

2 seconds or more

POSSIBLE CAUSE

  • Fuse

  • Harness and connector (A/C switch assembly circuit is open or shorted)

  • A/C switch assembly

  • A/C amp.

FAIL-SAFE

—

Confirmation Procedure

Confirmation Procedure

  1. PERFORM SELF DIAGNOSTIC RESULT

    1. CONSULT

      1. Ignition switch ON.

      2. Select “Self Diagnostic Result” mode of “HVAC”.

      3. Check DTC.

    Is DTC detected?

    YES>>

    Refer to DTC Diagnosis Procedure.

    NO>>

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

    NO>>

    Confirmation after repair: Inspection End.

Dtc Diagnosis Procedure

DTC Diagnosis Procedure

  1. CHECK FUSE

      1. Ignition switch OFF.

      2. Check that the following fuse is not blown (open):

        Component

        Location

        Fuse No.

        Capacity

        A/C switch assembly

        Fuse block (J/B)

        6

        10 A

    Is the fuse blown (open)?

    YES >>

    Replace the blown (open) fuse after repairing the affected circuit if a fuse is blown (open).

    NO >>

    GO TO 2.

  2. CHECK A/C SWITCH ASSEMBLY POWER SUPPLY

      1. Disconnect A/C switch assembly connector.

      2. Ignition switch ON.

      3. Check voltage between A/C switch assembly harness connector and ground.

        +

        -

        Voltage

        (Approx.)

        A/C switch assembly

        Connector

        Terminal

        M59

        5

        Ground

        Battery voltage

    Is the inspection result normal?

    YES >>

    GO TO 3.

    NO >>

    Repair harness or connector between A/C switch assembly and fuse.

  3. CHECK A/C SWITCH ASSEMBLY GROUND CIRCUIT FOR OPEN

      1. Ignition switch OFF.

      2. Check continuity between A/C switch assembly harness connector and ground.

        A/C switch assembly

        —

        Continuity

        Connector

        Terminal

        M59

        7

        Ground

        Yes

    Is the inspection result normal?

    YES >>

    GO TO 4.

    NO >>

    Repair harness or connector.

  4. CHECK A/C SWITCH ASSEMBLY LIN SIGNAL

      1. Connect A/C switch assembly connector.

      2. Ignition switch ON.

      3. Confirm output waveform between A/C switch assembly harness connector and ground with oscilloscope.

        +

        -

        Output waveform

        A/C switch assembly

        Connector

        Terminal

        M59

        8

        Ground

    Is the inspection result normal?

    YES >>

    Replace A/C switch assembly. Refer to Removal and Installation.

    NO >>

    GO TO 5.

  5. CHECK LIN COMMUNICATION SIGNAL CIRCUIT FOR OPEN

      1. Ignition switch OFF.

      2. Disconnect A/C switch assembly connector and A/C amp. connector.

      3. Check continuity between A/C switch assembly harness connector and A/C amp. harness connector.

        A/C switch assembly

        A/C amp.

        Continuity

        Connector

        Terminal

        Connector

        Terminal

        M59

        8

        M82

        68

        Yes

    Is the inspection result normal?

    YES >>

    GO TO 6.

    NO >>

    Repair harness or connector.

  6. CHECK LIN COMMUNICATION SIGNAL CIRCUIT FOR SHORT

      1. Check continuity between A/C switch assembly harness connector and ground.

        A/C switch assembly

        —

        Continuity

        Connector

        Terminal

        M59

        8

        Ground

        No

      2. Check voltage between A/C switch assembly harness connector and ground.

        +

        -

        Voltage

        (Approx.)

        A/C switch assembly

        Connector

        Terminal

        M59

        8

        Ground

        0 V

    Is the inspection result normal?

    YES >>

    Replace A/C amp. Refer to Removal and Installation.

    NO >>

    Repair harness or connector.

    B24b4-02 A/c Control
    Dtc Description DTC Description DTC DETECTION LOGIC DTC No. CONSULT screen terms (Trouble diagnosis content) DTC detection condition B24B4-02 A/C CONTROL (Air conditioning contr...
    B24f5-93 Mode Door Motor
    Dtc Description DTC Description DTC DETECTION LOGIC Note: If all of door motors DTC (B24F5-93, B24F6-93, B24F7-93) are detected, check “DOOR MOTOR CIRCUIT”. Refer to Diagnos...

    Other materials:

    Intelligent Key Battery. Removal and Installation
    Removal and Installation Removal and Installation Release the lock knob at the back of the Intelligent Key and remove the mechanical key. Insert remover tool (A) wrapped with a cloth into the slit of the corner and twist it to separate the upper par ...

    Sonar System. Basic Inspection
    Diagnosis and Repair Work Flow. Work Flow Work Flow Work Flow OVERALL SEQUENCE Reference 1: Refer to CONSULT Function. Reference 2: Refer to DTC Index. Reference 3: Refer to Symptom Table. DETAILED FLOW INTERVIEW AND SYMPTO ...

    P2809-00 Pressure Control Solenoid G
    Dtc Description DTC Description DTC DETECTION LOGIC DTC CONSULT screen terms (Trouble diagnosis content) DTC detection ...