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Nissan Sentra B18 (2020-2025) Service Manual: System Description

Component Parts

Eco Mode System

Component Parts Location

Component Parts Location

A.

Instrument lower panel LH

No.

Component

Function

1.

A/C auto amp. (Auto A/C)

The A/C auto amp. or A/C amp. receives the ECO mode signal from the BCM via CAN communication.

Refer to Component Parts Location (Auto A/C), Component Parts Location (Manual A/C) for detailed component location.

A/C amp. (Manual A/C)

2.

Electric throttle control actuator

Refer to Component Description for detailed component location.

3.

ECM (Engine Control Module)

The ECM receives the ECO mode signal from the BCM via CAN communication.

Refer to Component Parts Location for detailed component location.

4.

BCM (Body Control Module)

  • The BCM transmits the ECO mode indicator signal to the combination meter via CAN communication.

  • The BCM transmits the ECO mode signal to the ECM and A/C auto amp. or A/C amp. via CAN communication.

Refer to System Description.

5.

Combination meter

The combination meter receives the ECO mode indicator signal via CAN communication from the BCM.

Refer to Component Parts Location (Type A) or Component Parts Location (Type B) for detailed component location.

6.

ECO mode switch

Refer to ECO Mode Switch.

Eco Mode Switch

ECO Mode Switch

  • The ECO mode switch is installed to the instrument lower finisher.

  • When the ECO mode indicator lamp on the combination meter is OFF and the ECO mode switch is pressed, the ECO mode is active and the ECO mode indicator lamp is ON.

  • When the ECO mode indicator lamp on the combination meter is ON and the ECO mode switch is pressed, the ECO mode is cancelled and the ECO mode indicator lamp is OFF.

Eco Mode Indicator Lamp

ECO Mode Indicator Lamp

DESIGN/PURPOSE

The ECO mode indicator lamp inform the driver that the vehicle is in ECO mode.

SIGNAL PATH

  • Combination meter receives ECO mode switch signal (ON/OFF) from BCM via CAN communication.

    Based on the signal, BCM transmits ECO mode signal to ECM via CAN communication.

  • ECM transmits ECO mode indicator signal to combination meter via CAN communication. Based on the signal, combination meter illuminates ECO mode indicator lamp.

LIGHTING CONDITION

When all of the following conditions are satisfied.

  • Ignition switch: ON

  • The ECO mode switch is pressed when the ECO mode indicator lamp is OFF

SHUTOFF CONDITION

When any of the condition listed below is satisfied.

  • Ignition switch: Other than ON

  • The ECO mode switch is pressed when the ECO mode indicator lamp is ON.

System

Eco Mode Control

System Description

System Description

SYSTEM DIAGRAM

INPUT/OUTPUT SIGNAL CHART

Signal name

Input

Output

Description

ECO mode signal

  • ECM (CAN)

  • A/C auto amp. (CAN)

BCM

Transmits ECO mode signal to ECM and A/C auto amp meter via CAN communication.

ECO mode indicator signal

Combination meter (CAN)

BCM

Transmits ECO mode indicator signal to combination meter via CAN communication.

BCM CONTROL

  • BCM receives the ECO mode switch signal (ON/OFF) by hard wire. BCM transmits ECO mode signal to other control unit via CAN communication.

  • BCM transmits ECO mode indicator signal to combination meter via CAN communication.  Combination meter illuminates ECO mode indicator lamp according to the signal.

  • For Air Conditioning Control details. Refer to System Description(Auto A/C) or System Description(Manual A/C).

Note:

When the ignition switch is placed ON while the ECO mode indicator lamp stays ON, the ECO mode is automatically turned OFF at the next ignition switch ON.

ECM CONTROL

  • ECM receives the ECO mode signal from BCM via CAN communication and improves the fuel economy by controlling the throttle movement to less than usual. (reducing energy consumption by decreasing needless acceleration and deceleration), so that operation of fuel efficiency driving is assisted.

  • ECM transmits ECO mode indicator signal to combination meter via CAN communication. Combination meter illuminates ECO mode indicator lamp according to the signal.

  • For Air Conditioning Control details.

Note:

When the ignition switch is placed OFF while the ECO mode indicator lamps stays ON, the ECO mode indicator lamp automatically turns ON at the next ignition switch ON.

A/C AUTO AMP. CONTROL

For details of air conditioning control, Refer to System Description.

A/C AMP. CONTROL

For details of air conditioning control, Refer to System Description.

FAIL-SAFE

If a malfunction occurs in the CAN communication during ECO mode, the ECO mode is kept until  ignition off, ECO mode is turned off automatically at the next ignition switch ON.

Warning/indicator/chime List

Warning / Indicator / Chime List

Warning / Indicator / Chime List

Name

Design

Layout/Function

ECO mode indicator lamp

Refer to ECO Mode Indicator Lamp.
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