Nissan Sentra manuals

Nissan Sentra B18 (2020-2025) Service Manual: Ecv (electrical Control Valve)

Nissan Sentra B18 (2020-2025) Service Manual / Ventilation, Heater & Air Conditioner / Heater & Air Conditioning Control System :: Manual Air Conditioner / Dtc/circuit Diagnosis / Ecv (electrical Control Valve)

Diagnosis Procedure

Diagnosis Procedure

  1. CHECK ECV POWER SUPPLY

      1. Ignition switch OFF.

      2. Disconnect A/C compressor connector.

      3. Ignition switch ON.

      4. 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 3.

    NO >>

    GO TO 2.

  2. CHECK FUSE

      1. Ignition switch OFF.

      2. Check 10 A fuse [No. 89, located in IPDM E/R].

    Is the inspection result normal?

    YES >>

    Repair harness or connector between A/C compressor and fuse.

    NO >>

    Replace the blown fuse after repairing the affected circuit.

  3. 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 4.

    NO >>

    Repair harness or connector.

  4. 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 5.

    NO >>

    Repair harness or connector.

  5. CHECK ECV

    1. Check ECV. Refer to Component Inspection.

    Is the inspection result normal?

    YES >>

    GO TO 6.

    NO >>

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

  6. CHECK INTERMITTENT INCIDENT

    1. Refer to Intermittent Incident.

    Is the inspection result normal?

    YES >>

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

    NO >>

    Repair or replace malfunctioning parts.

Component Inspection

Component Inspection

  1. CHECK ECV (ELECTRICAL CONTROL VALVE)

      1. Ignition switch OFF.

      2. Disconnect A/C compressor connector.

      3. Check continuity between A/C compressor connector F10 terminals.

        A/C compressor

        Condition

        Resistance (Ω)

        (Approx.)

        Terminals

        Temperature: °F (°C)

        3

        4

        68 (20)

        10.1 – 11.1

    Is the inspection result normal?

    YES >>

    Inspection End.

    NO >>

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

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Symptom Diagnosis
...

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