System Description

SYSTEM DIAGRAM

Courtesy of NISSAN NORTH AMERICA, INC.

SIGNAL TRANSMISSION FUNCTION LIST

Signal name	Input	Output	Description
Inside key antenna signal	Intelligent Key unit	BCM (CAN) IPDM E/R (CAN)	Inputs the inside key antenna signal via CAN communication
ID verification signal	Intelligent Key unit	BCM (CAN) IPDM E/R (CAN)	Inputs the ID verification signal via CAN communication
Engine status signal	ECM	BCM (CAN) TCM (CAN) IPDM E/R (CAN) Combination meter (CAN) ABS actuator and electric unit (CAN)	Inputs the engine status signal via CAN communication
Push-button ignition switch status signal	Intelligent Key unit	BCM (CAN)	Inputs the push-button ignition switch status signal via CAN communication
Brake pedal position switch	BCM	Intelligent Key unit (CAN)	Inputs the brake pedal position switch via CAN communication
CVT shift select signal	BCM	TCM (CAN)	Inputs the CVT shift select signal via CAN communication
Stop lamp switch signal	BCM	TCM (CAN) ABS actuator and electric unit (CAN)	Inputs the stop lamp switch signal via CAN communication
Door switch signal	BCM	Intelligent Key unit (CAN)	Inputs the door switch signal via CAN communication
Vehicle speed signal	ABS actuator and electric unit	BCM (CAN) TCM (CAN) IPDM E/R (CAN) Combination meter (CAN)	Inputs the engine status signal via CAN communication
Park/neutral position switch signal	ECM	BCM (CAN)	Inputs the park/neutral position switch signal via CAN communication
Clutch switch signal	BCM	IPDM E/R (CAN)	Inputs clutch switch signal via CAN communication

SYSTEM DESCRIPTION

The engine start function of Intelligent Key system makes it possible to start and stop the engine without using the key, based on the electronic ID verification. The electronic ID verification is performed between Intelligent Key unit and Intelligent Key when the push-button ignition switch is pressed while the Intelligent Key is within the detection area of inside key antenna.
NOTE: The driver should carry the Intelligent Key at all times.
Intelligent Key have ID (Key ID). It can perform the door lock/unlock operation and the push-button ignition switch operation when the registered Intelligent Key is carried.
If the ID is successfully verified, when push-button ignition switch is pressed, the engine can be started.
Up to 4 Intelligent Keys can be registered (Including the standard Intelligent Key) upon request from the customer.

PRECAUTIONS FOR INTELLIGENT KEY SYSTEM

The transponder (the chip for NATS ID verification) is integrated into the Intelligent Key. It is integrated into the mechanical key.) Therefore, ID verification cannot be performed by mechanical key only. In that case, NATS ID verification can be performed when Intelligent Key backside is contacted to push-button ignition switch while brake pedal is depressed. If verification result is OK, engine can be started.

OPERATION WHEN INTELLIGENT KEY IS CARRIED

When the push-button ignition switch is pressed, the Intelligent Key unit activates the inside key antenna and transmits the request signal to the Intelligent Key.
The Intelligent Key receives the request signal and transmits the NATS ID signal to the Intelligent Key unit.
Intelligent Key unit receives the NATS ID signal verifies it with the registered ID.
When the ignition switch is placed to ON, Intelligent Key unit performs ID verification with the ECM. When the result is OK, engine start is permitted.
When ECM detects that the start engine conditions * are satisfied, it transmits a starter cut relay request signal to BCM.
When BCM receives a starter cut relay request signal from ECM, the starter cut relay is turned ON.
When starter cut relay is turned ON, IPDM E/R turns ON the starter relay and drives the starter motor.
When BCM receives an engine status signal from ECM, it turns the starter relay and starter cut relay OFF and stops cranking.
CAUTION:
When the Intelligent Key is carried outside of the vehicle (outside key antenna detection area) while the power supply is in the ON position, even if the engine start condition * is satisfied, the engine cannot be started.

*: For the engine start condition, refer to "IGNITION SWITCH POSITION CHANGE TABLE BY PUSH-BUTTON IGNITION SWITCH OPERATION".

OPERATION RANGE

Engine can be started when Intelligent Key is inside the vehicle. However, sometimes engine may not start when Intelligent Key is on instrument panel or in glove box.

ENGINE START OPERATION WHEN INTELLIGENT KEY IS CONTACTED TO PUSH-BUTTON IGNITION SWITCH

When Intelligent Key battery is discharged, NATS ID verification between transponder in Intelligent Key and Intelligent Key unit is performed when Intelligent Key backside is contacted to push-button ignition switch while brake pedal is depressed. If the verification result is OK, engine can be started.

IGNITION SWITCH POSITION CHANGE TABLE BY PUSH-BUTTON IGNITION SWITCH OPERATION

The ignition switch position can be changed by the following operations.

NOTE:

When an Intelligent Key is within the detection area of inside key antenna or when Intelligent Key backside is contacted to push-button ignition switch, it is equivalent to the operations below.
When starting the engine, the BCM monitors under the engine start conditions, CVT models
- Brake pedal operation condition
- Selector lever position
- Vehicle speed
M/T models
- Brake pedal operation condition
- Clutch pedal operation condition
- Vehicle speed

Vehicle speed: less than 2.5 MPH (4 km/h)

Power supply position	Condition						Push-button ignition switch operation frequency
	CVT models		M/T models
	Selector lever	Brake pedal operation condition	Normal condition		Special condition
	Selector lever	Brake pedal operation condition	Shift lever	Clutch pedal operation condition	Shift lever	Brake pedal operation condition
LOCK → ON	-	Not depressed	-	Not depressed	-	Not depressed	1
LOCK → ON → OFF	-	Not depressed	-	Not depressed	-	Not depressed	2
LOCK → START/ON → START	P or N position	Depressed	-	Depressed	Neutral	Depressed	1
Engine is running → LOCK	-	-	-	-	-	-	1

NOTE:

If the Intelligent Key unit cannot detect that the Intelligent Key is in the vehicle, ignition switch can be placed OFF by the press and hold the push-button ignition switch for 2 seconds or more.

Vehicle speed: 2.5 MPH (4 km/h) or more

Power supply position	Condition						Push-button ignition switch operation frequency
	CVT models		M/T models
	Selector lever	Brake pedal operation condition	Normal condition		Special condition
	Selector lever	Brake pedal operation condition	Shift lever	Clutch pedal operation condition	Shift lever	Brake pedal operation condition
Engine is running → OFF	-	-	-	-	-	-	Emergency stop operation
Engine stall return operation while driving	N position	Not depressed	-	Depressed	Neutral	-	1

Emergency stop operation

Press and hold the push-button ignition switch for 2 seconds or more.
Press the push-button ignition switch 3 times or more within 1.5 seconds.