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Nissan Sentra B18 (2020-2025) Service Manual / Electrical & Power Control / Power Supply, Ground & Circuit Elements :: System Description

Nissan Sentra B18 (2020-2025) Service Manual: Power Supply, Ground & Circuit Elements :: System Description

Component Parts. Electrical Units Location. Electrical Units Location

Component Parts Location

Component Parts Location

No.

Component

1.

Fusible Link Box (Battery)

2.

Battery

3.

Fuse, Fusible Link and Relay Box

4.

IPDM E/R (Intelligent Power Distribution Module Engine Room)

5.

Fuse Block Junction Box (J/B)

System. Power Supply, Ground & Circuit Elements. Power Supply, Ground & Circuit Elements

Harness Connector

Harness Connector

HARNESS CONNECTOR (TAB-LOCKING TYPE)

  • The tab-locking type connectors help prevent accidental looseness or disconnection.

  • The tab-locking type connectors are disconnected by pushing or lifting the locking tab(s). Refer to the figure below.

Refer to the next page for description of the slide-locking type connector.

CAUTION:

Do not pull the harness or wires when disconnecting the connector.

[Example]

HARNESS CONNECTOR (SLIDE-LOCKING TYPE)

  • A new style slide-locking type connector is used on certain systems and components, especially those related to OBD.

  • The slide-locking type connectors help prevent incomplete locking and accidental looseness or disconnection.

  • The slide-locking type connectors are disconnected by pushing or pulling the slider. Refer to the figure below.

CAUTION:

  • Do not pull the harness or wires when disconnecting the connector.

  • Be careful not to damage the connector support bracket when disconnecting the connector.

[Example]

HARNESS CONNECTOR (LEVER LOCKING TYPE)

  • Lever locking type harness connectors are used on certain control units and control modules such as ECM, ABS actuator and electric unit (control unit), etc.

  • Lever locking type harness connectors are also used on super multiple junction (SMJ) connectors.

  • Always confirm the lever is fully locked in place by moving the lever as far as it will go to ensure full connection.

CAUTION:

  • Always confirm the lever is fully released (loosened) before attempting to disconnect or connect these connectors to avoid damage to the connector housing or terminals.

1.

Control unit with single lever

2.

Control unit with dual lever

3.

SMJ connector

A. Fasten

A. Lever

A. Lever

B. Loosen

B. Fasten

B. Fasten

C. Lever

C. Loosen

C. Loosen

Standardized Relay

Standardized Relay

NORMAL OPEN, NORMAL CLOSED AND MIXED TYPE RELAYS

Relays can mainly be divided into three types: normal open, normal closed and mixed type relays.

TYPE OF STANDARDIZED RELAYS

1M ···················· 1 Make

2M ···················· 2 Make

1T ···················· 1 Transfer

1M·1B ···················· 1 Make 1 Break
    Power Supply, Ground & Circuit Elements. Preparation. Preparation
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    Power Supply, Ground & Circuit Elements. Wiring Diagram
    Harness. Harness Layout Harness Layout Harness Layout OUTLINE Refer to Harness Layout. BODY HARNESS - LH VIEW Refer to Harness Layout. BODY HARNESS - LOWER REAR VIEW Refer to Ha...

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