LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Nissan-Datsun >> 2019 >> Sentra S, Standard Trans >> Repair and Diagnosis >> Transmission >> Transmission Control Systems >> Drive Mode System (ECO Mode) (CVT) >> ECO Mode (CVT) >> DTC/Circuit Diagnosis >> ECO Mode Switch >> Diagnosis Procedure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Diagnosis Procedure

  1. DETECT MALFUNCTIONING ITEMS 

    What is malfunction items?

    ECO mode switch illumination does not turns ON

    GO TO 2 .

    ECO mode indicator lamp does not turns ON

    GO TO 8 .

  2. CHECK ECO MODE SWITCH ILLUMINATION POWER SUPPLY (1) 
    1. Turn OFF the headlamp.
    2. Turn ignition switch OFF.
    3. Disconnect ECO mode switch harness connector.
    4. Turn ignition switch ON.
    5. Turn ON the headlamp.
    6. Check the voltage between ECO mode switch harness connector terminals.

      ECO mode switch

      Voltage

      Connector

      +

      -

      Terminal

      M82

      1

      4

      Battery voltage

    Is the inspection result normal?

    YES

    GO TO 3 .

    NO

    GO TO 4 .

  3. CHECK INTERMITTENT INCIDENTE 

    Refer to Intermittent Incident .

    Is the inspection result normal?

    YES

    Replace ECO mode switch. Refer to Removal and Installation .

    NO

    Replace the fuse after repair the applicable circuit.

  4. CHECK ECO MODE SWITCH ILLUMINATION POWER SUPPLY (2) 

    Check the voltage between ECO mode switch harness connector and ground.

    +

    -

    Voltage

    ECO mode switch

    Connector

    Terminal

    M82

    1

    Ground

    Battery voltage

    Is the inspection result normal?

    YES

    GO TO 7 .

    NO

    GO TO 5 .

  5. CHECK FUSE 
    1. Turn OFF the headlamp.
    2. Turn ignition switch OFF.
    3. Pull out #37 fuse. Refer to IPDM E/R Terminal Arrangement .
    4. Check that the fuse is not fusing.

    Is the inspection result normal?

    YES

    GO TO 6 .

    NO

    Replace the fuse after repair the applicable circuit.

  6. CHECK ECO MODE SWITCH ILLUMINATION POWER SUPPLY CIRCUIT 
    1. Disconnect IPDM E/R harness connector E45. Refer to (with Intelligent Key) or (without Intelligent Key).
    2. Check the continuity between IPDM E/R harness connector and ECO mode switch harness connector.

      +

      -

      Continuity

      IPDM E/R

      ECO mode switch

      Connector

      Terminal

      Connector

      Terminal

      E45

      33

      M82

      1

      Existed
    3. Also check harness for short to ground.

    Is the inspection result normal?

    YES

    Perform IPDM E/R auto active test and check tail lamp relay operation. Refer to Diagnosis Description (with intelligent key), Diagnosis Description (without intelligent key).

    NO

    Repair or replace error-detected parts.

  7. CHECK GROUND CIRCUIT 
    1. Turn OFF the headlamp.
    2. Turn ignition switch OFF.
    3. Check continuity between ECO mode switch harness connector terminal and ground.

      +

      -

      Continuity

      ECO mode switch

      Connector

      Terminal

      M82

      4

      Ground

      Existed

    Is the inspection result normal?

    YES

    Check intermittent incident. Refer to Intermittent Incident .

    NO

    Repair or replace error-detected parts.

  8. CHECK ECO MODE SWITCH CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect ECO mode switch harness connector.
    3. Turn ignition switch ON.
    4. Check voltage between ECO mode switch harness connector terminals.

      ECO mode switch

      Voltage

      (Approx.)

      Connector

      +

      -

      Terminal

      M82

      6

      8

      5 V

    Is the inspection result normal?

    YES

    GO TO 13 .

    NO

    GO TO 9 .

  9. CHECK GROUND CIRCUIT 
    1. Turn ignition switch OFF.
    2. Check the continuity between ECO mode switch harness connector and ground.

      ECO mode switch

      -

      Continuity

      Connector

      Terminal

      M82

      8

      Ground

      Existed

    Is the inspection result normal?

    YES

    GO TO 10 .

    NO

    Repair or replace damaged parts.

  10. CHECK CIRCUIT BETWEEN COMBINATION METER AND ECO MODE SWITCH (1) 
    1. Disconnect combination meter harness connector M24.
    2. Check continuity between combination meter harness connector terminal and ECO mode switch harness connector terminal.

      Combination meter

      ECO mode switch

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      M24

      25

      M82

      6

      Existed

    Is the inspection result normal?

    YES

    GO TO 11 .

    NO

    Repair or replace damaged parts.

  11. CHECK CIRCUIT BETWEEN COMBINATION METER AND ECO MODE SWITCH (2) 

    Check continuity between combination meter harness connector terminal and ECO mode switch harness connector terminal.

    Combination meter

    -

    Continuity

    Connector

    Terminal

    M24

    25

    Ground

    Not existed

    Is the inspection result normal?

    YES

    GO TO 12 .

    NO

    Repair or replace damaged parts.

  12. CHECK COMBINATION METER INPUT/OUTPUT SIGNAL 
    1. Connect all of disconnected connectors.
    2. Check input/output signal of combination meter. Refer to Reference Value .

    Is the inspection result normal?

    YES

    Check intermittent incident. Refer to Intermittent Incident .

    NO

    Replace combination meter. Refer to Removal and Installation .

  13. CHECK ECO MODE SWITCH 

    Check ECO mode switch. Refer to Component Inspection .

    Is the inspection result normal?

    YES

    Check intermittent incident. Refer to Intermittent Incident .

    NO

    Replace ECO mode switch. Refer to Removal and Installation .

scientia non olet · About LEMON Manuals