Nissan Sentra B18 (2020-2025) Service Manual: Warning Function

Nissan Sentra B18 (2020-2025) Service Manual / Body Exterior, Doors, Roof & Vehicle Security / Door & Lock :: System Description / System (intelligent Key System) / Warning Function

System Description

System Description

OPERATION DESCRIPTION

The warning function are as per the following items and are given to the user as warning information and warnings using combinations of Intelligent Key warning buzzer, combination meter buzzer, KEY warning lamp and information display in combination meter:

Intelligent Key system malfunction
OFF position warning
P position warning
No key detected warning
Door lock operation warning
Engine start information
Intelligent Key low battery warning
Key ID warning
Key ID verification information

OPERATION CONDITION

Once the following condition from below is established, alert or warning is executed:

Warning/Information functions		Operation procedure
Intelligent Key system malfunction		When a malfunction is detected on BCM, “KEY” warning lamp illuminates.
OFF position warning	For internal	When condition A, B or condition C is satisfied Condition A Ignition switch: ACC position Door switch (driver side): ON (Door is open) Condition B Ignition switch from ON to OFF while door is open Condition C Intelligent Key backside is contacted to ignition switch while brake pedal is depressed and ignition switch is LOCK or OFF (When the Intelligent Key battery is discharged) Door switch (driver side): ON (Door is open)
OFF position warning	For external	OFF position warning (For internal) is in active mode, driver side door is closed. Note: OFF position (For external) active only when each of the sequence occurs as below: P position warning → ACC warning → OFF position warning (For internal) → OFF position warning (For internal)
P position warning	For internal	Shift position: Except P (Park) position Engine is running to stopped (ignition switch is ON to OFF)
P position warning	For external	Warning is activated when driver door is closed from the open position while the P (Park) position warning (for inside Nissan Sentra vehicle) is ON.
No key detected warning	Door is open to close	Ignition switch: Except Lock position Door switch: ON to OFF (Door is open to close) Intelligent Key cannot be detected inside the Nissan Sentra vehicle
	Door is open	Ignition switch: Except Lock position Door switch: ON (Door is open) Key ID verification every 5 seconds when registered Intelligent Key cannot be detected inside the Nissan Sentra vehicle
	Push-button ignition switch operation	Ignition switch: Except Lock position Press push-button ignition switch Intelligent Key cannot be detected inside the Nissan Sentra vehicle
Door lock operation warning		When door lock operation is requested while door lock operating condition of door request switch or Intelligent Key are not satisfied
Engine start information	Ignition switch is ON position	Ignition switch: ON position Shift position: P (Park) position Engine is stopped
Engine start information	Ignition switch is except ON position	Ignition switch: Except ON position Shift position: P (Park) position Intelligent Key can be detected inside the Nissan Sentra vehicle
Intelligent Key low battery warning		When Intelligent Key is low battery, BCM is detected after ignition switch is turned ON
Key ID warning		When registered Intelligent Key cannot be detected inside the Nissan Sentra vehicle after ignition switch is placed ON
Key ID verification information		When registered Intelligent Key cannot be detected inside the Nissan Sentra vehicle Intelligent Key battery is discharged When NATS antenna cannot be detected NATS ID

WARNING METHOD

The following table shows the alarm or warning methods with chime:

Warning/Information functions		“KEY” warning lamp	Information display (combination meter)	Warning chime
Warning/Information functions		“KEY” warning lamp	Information display (combination meter)	Combination meter buzzer	Intelligent Key warning buzzer
Intelligent Key system malfunction		Indicate	—	—	—
OFF position warning	For internal	—	—	Activate	—
OFF position warning	For external	—	—	—	Activate
P position warning	For internal	—		Activate	—
P position warning	For external	—		—	Active
No key detected warning	Door is open to close	—		Activate	Activate
	Door is open			—	—
	Push-button ignition switch operation			Activate	—
Door lock operation warning	Request switch operation	—	—	—	Activate
Door lock operation warning	Intelligent Key	—	—	—	Activate
Key ID warning		—		—	—
Engine start information		—		—	—
Intelligent Key low battery warning		—		—	—
Key ID verification information		—		—	—

LIST OF OPERATION RELATED PARTS

Parts marked with × are the parts related to operation.

Warning function		Intelligent Key	Ignition switch	Door switch	Door request switch (if equipped)	Inside key antenna	Outside key antenna	Intelligent Key warning buzzer	Combination meter buzzer	CAN communication system	BCM	Information display	“KEY” warning lamp
Intelligent Key system malfunction										×	×		×
OFF position warning	For internal			×					×	×	×
OFF position warning	For external			×				×			×
P (Park) position warning			×						×	×	×	×	×
No key detected warning	Door is open or close	×		×		×		×	×	×	×	×	×
	Door is open	×		×		×				×	×	×	×
	Push-button ignition switch operation	×	×			×			×	×	×	×	×
Door lock operation warning		×		×	×	×	×	×			×
Key ID warning			×			×				×	×	×	×
Engine start information	Ignition switch is ON position	×	×			×				×	×	×
Engine start information	Ignition switch is except ON position	×	×			×				×	×	×
Intelligent Key low battery warning		×				×				×	×	×	×
Key ID verification information		×				×				×	×	×

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