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: B20c8-14 Compressor (ecv)

Dtc Description

DTC Description

DTC DETECTION LOGIC

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detection condition

B20C8-14

Compressor (ECV)

[Compressor (electrical control valve)]

[CIRC SHORT TO GRND OR OPEN]

Diagnosis condition

When A/C switch is ON

Signal (Terminal)

ECV control signal

Threshold

ECV control signal circuit has a shorted to ground or open

Diagnosis delay time

1 second or more

POSSIBLE CAUSE

  • Fuse

  • Harness or connectors (ECV control signal circuit is shorted to ground or open)

  • A/C compressor

  • IPDM E/R

FAIL-SAFE

Inhibit A/C compressor (ECV) operation

Confirmation Procedure

Confirmation Procedure

  1. PERFORM DTC CONFIRMATION PROCEDURE

    1. CONSULT

      1. Start the engine.

      2. Turn A/C switch ON.

      3. Select “Self Diagnostic Result” mode of “IPDM E/R”.

    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 compressor

        IPDM E/R

        89

        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 ECV POWER SUPPLY CIRCUIT

      1. Disconnect A/C compressor connector.

      2. Ignition switch ON.

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

        +

        −

        Voltage

        (Approx.)

        A/C compressor

        Connector

        Terminal

        F10

        4

        Ground

        Battery voltage

    Is the inspection result normal?

    YES>>

    GO TO 4.

    NO>>

    GO TO 3.

  3. CHECK ECV POWER SUPPLY CIRCUIT FOR OPEN

      1. Ignition switch OFF.

      2. Disconnect IPDM E/R connector.

      3. Check continuity between A/C compressor harness connector and IPDM E/R harness connector.

        A/C compressor

        IPDM E/R

        Continuity

        Connector

        Terminal

        Connector

        Terminal

        F10

        4

        F96

        71

        Yes

    Is the inspection result normal?

    YES>>

    Replace IPDM E/R. Refer to Removal and Installation.

    NO>>

    Repair harness or connector.

  4. CHECK ECV CONTROL SIGNAL CIRCUIT FOR OPEN

      1. Ignition switch OFF.

      2. Disconnect IPDM E/R connector.

      3. Check continuity between A/C compressor harness connector and IPDM E/R harness connector.

        A/C compressor

        IPDM E/R

        Continuity

        Connector

        Terminal

        Connector

        Terminal

        F10

        3

        F98

        98

        Yes

    Is the inspection result normal?

    YES>>

    GO TO 5.

    NO>>

    Repair harness or connector.

  5. CHECK ECV CONTROL SIGNAL CIRCUIT FOR SHORT

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

      A/C compressor

      —

      Continuity

      Connector

      Terminal

      F10

      3

      Ground

      No

    Is the inspection result normal?

    YES>>

    GO TO 6.

    NO>>

    Repair harness or connector.

  6. CHECK ECV

    1. Check ECV. Refer to Component Inspection.

    Is the inspection result normal?

    YES>>

    Replace IPDM E/R. Refer to Removal and Installation.

    NO>>

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

    B20c7-15 A/c Clutch
    Dtc Description DTC Description DTC DETECTION LOGIC DTC No. CONSULT screen terms (Trouble diagnosis content) DTC detection condition B20C7–15 A/C clutch (A/C clutch) [CIRC SHO...
    B24a4-11 Intake Sensor
    Dtc Description DTC Description DTC DETECTION LOGIC DTC No. CONSULT screen terms (Trouble diagnosis content) DTC detection condition B24A4-11 INTAKE SENSOR (Intake sensor) Diagn...

    Other materials:

    Flash Code Index
    Flash Code Index WARNING LAMP FLASH CODE CHART How to read flash codes Put the Nissan Sentra vehicle in Diagnosis Mode. Refer to Trouble Diagnosis without CONSULT. All codes are proceeded by a seven second ”holding” flash. Identify how ma ...

    C106b-64 Stop Lamp Switch
    Dtc Description DTC Description DTC DETECTION LOGIC DTC No. CONSULT screen item (Trouble diagnosis content) DTC detection condition ...

    System
    Body Control System System Description System Description OUTLINE The BCM controls the various electrical components. It inputs the information required for control via CAN communication and the signal received from each switch and sensor. The BCM ...