System Description

SYSTEM DIAGRAM

Courtesy of NISSAN NORTH AMERICA, INC.

Component		Function
Stop lamp switch		Stop lamp switch detects that brake pedal is depressed, and then transmits stop lamp switch signal to BCM.
ABS actuator and electric unit (control unit)		ABS actuator and electric unit (control unit) transmits the vehicle speed signal to BCM via CAN communication.
VCM		VCM detects that selector lever is locked in the P position, then transmits shift position signal to BCM via CAN communication.
IPDM E/R		IPDM E/R detected power switch status and the transmits power switch ON signal to BCM via CAN communication.
BCM		BCM receives stop lamp switch signal from the stop lamp switch.
Power switch	Push switch	Power switch has push switch inside which detects that power switch is pressed, and then transmits the push switch signal to Intelligent Key unit. Intelligent Key unit changes the power switch position with the operation of power switch. Intelligent Key unit maintains the power switch position status while power switch is not operated.
Power switch	NATS antenna amp.	Refer to NATS Antenna Amp. .
Intelligent Key		Intelligent Key transmits the key ID to Intelligent Key unit.
Intelligent Key unit		Intelligent Key unit controls INTELLIGENT KEY SYSTEM (READY SET FUNCTION) Intelligent Key unit performs the ID verification between Intelligent Key unit and Intelligent Key when the Intelligent Key is carried into the detection area of NATS antenna amp., and power switch is pressed. If the ID verification result is OK, power switch operation is available. Then, when the power switch is turned ON, Intelligent Key unit performs ID verification between Intelligent Key unit and inverter (front). If the ID verification result is OK, inverter (front) can be set to READY.
Inverter (front)		When power switch is turned ON, Intelligent Key unit starts communication with inverter (front) and performs the ID verification between Intelligent Key unit and inverter (front). If the verification result is OK, the vehicle can be set to READY. If the verification result is NG, the vehicle cannot be set to READY.

BCM INPUT/OUTPUT SIGNAL CHART

Input Signal Item

Transmit unit	Signal name
IPDM E/R	CAN communication	Power switch ON signal
ABS actuator and electric unit (control unit)		Vehicle speed signal
VCM		Shift position signal
Stop lamp switch	Stop lamp switch signal

Output Signal Item

Reception unit	Signal name
IPDM E/R	CAN communication	Power switch ON signal
VCM	CAN communication	READY signal

INTELLIGENT KEY UNIT INPUT/OUTPUT SIGNAL CHART

Input Signal Item

Transmit unit	Signal name
VCM	CAN communication	READY condition signal
NATS antenna amp.	Key ID signal
Push switch	Power switch signal

Output Signal Item

Reception unit	Signal name
BCM	CAN communication	Power switch signal

SYSTEM DESCRIPTION

The READY set function of Intelligent Key system makes it possible to set the vehicle to READY without using the Intelligent Key, based on the electronic ID verification. The electronic ID verification is performed between Intelligent Key unit and Intelligent Key when the power switch is pressed while the Intelligent Key is within the detection area of NATS antenna amp.
NOTE: The driver should carry the Intelligent Key at all times.
Intelligent Key has 2 IDs (Intelligent Key ID and NATS ID). It can perform the door lock/unlock operation and the power switch operation when the registered Intelligent Key is carried.
If the ID is successfully verified, power switch operation can be available, and the vehicle can be set to READY.
Up to 4 Intelligent Keys can be registered upon request from the customer.
NOTE: For any functions other than the READY set function of Intelligent Key system. Refer to System Description .

PRECAUTIONS FOR INTELLIGENT KEY SYSTEM

The transponder (the chip for NATS ID verification) is integrated into the Intelligent 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 power switch while push switch is pressed. If verification result is OK, the vehicle can be set to READY.

OPERATION WHEN INTELLIGENT KEY IS CARRIED

When the power switch is pressed, Intelligent Key unit activates the NATS antenna amp. and transmits the request signal to the Intelligent Key.
The Intelligent Key receives the request signal and transmits the Intelligent Key ID signal to Intelligent Key unit.
Intelligent Key unit receives the Intelligent Key ID signal, and verifies it with the registered ID.
BCM transmits power switch ON signal to IPDM E/R.
When power switch is turned ON, Intelligent Key unit starts communication with inverter (front) and performs the ID verification between Intelligent Key unit and inverter (front). If the verification result is OK, the vehicle can be set to READY.
BCM detects that the brake pedal operating condition.
VCM detects that the shift position.
BCM transmits READY signal to VCM if BCM judges that the READY set condition * is satisfied.
*: For READY set condition, refer to "READY SET CONDITION TABLE BY POWER SWITCH OPERATION" below.
CAUTION:
- If a malfunction is detected in the Intelligent Key system, Intelligent Key system malfunction on information display appears. In this case, BCM does not transmits READY signal.
- When the Intelligent Key is carried outside of the vehicle (NATS antenna amp. detection area) while the power switch position is ON, BCM does not transmits READY signal even if READY set condition * is satisfied.

OPERATION RANGE

Vehicle can be set to READY when Intelligent Key is inside the vehicle. However, sometimes vehicle may not be set to READY when Intelligent Key is on instrument panel or in glove box.

READY SET CONDITION TABLE BY POWER SWITCH OPERATION

The vehicle can be set to READY by the following operations.

NOTE:

When an Intelligent Key is within the detection area of NATS antenna amp. and when Intelligent Key backside is contacted to power switch, it is equivalent to the operations below.
When setting the vehicle to READY, the Intelligent Key unit monitors READY set conditions,
- Brake pedal operating condition
- Shift position
- Vehicle speed

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

Power supply position	Condition		Power switch operation frequency
Power supply position	Shift position	Brake pedal operation condition	Power switch operation frequency
OFF → ON	-	Not depressed	1
OFF → ON → OFF	-	Not depressed	2
OFF → ON (READY) ON (Not READY) → ON (READY)	P or N position	Depressed	1
ON (READY) → OFF	-	-	1

NOTE:

If the Intelligent Key unit cannot detect that the Intelligent Key is in the vehicle, power switch cannot be turned OFF.

However, power switch can be turned off by performing of the following operation.

Press and hold the power switch for 2 seconds or more.
Press the power switch 3 times or more within 1.5 seconds.

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

Power supply position	Condition		Power switch operation frequency
Power supply position	Shift position	Brake pedal operation condition	Power switch operation frequency
ON (READY) → OFF	-	-	Emergency stop operation
OFF → ON (READY) (Return operation after emergency stop operation while driving)	N position	Not depressed	1

Emergency stop operation

Press and hold the power switch for 2 seconds or more.
Press the power switch 3 times or more within 1.5 seconds.