Nissan Altima HL32 Hybrid. Manual - part 984

INSPECTION AND ADJUSTMENT

SEC-9

< BASIC INSPECTION >

[INTELLIGENT KEY SYSTEM]

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INSPECTION AND ADJUSTMENT

ECM RE-COMMUNICATING FUNCTION
ECM RE-COMMUNICATING FUNCTION : Description

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Performing following procedure can automatically perform re-communication of ECM and BCM, but only when

the ECM has been replaced with a new one (*1).

*1: New one means an ECM which has never been energized on-board.

(In this step, initialization procedure by CONSULT-III is not necessary)

NOTE:

• When registering new Key IDs or replacing the ECM that is not brand new, refer to CONSULT-III Oper-

ation Manual NATS-IVIS/NVIS.

• If multiple keys are attached to the key holder, separate them before work.

• Distinguish keys with unregistered key ID from those with registered ID.

ECM RE-COMMUNICATING FUNCTION : Special Repair Requirement

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1.

PERFORM ECM RE-COMMUNICATING FUNCTION

1. Install ECM.

2. Insert the registered Intelligent Key (*2), turn ignition switch to “ON”.

*2: To perform this step, use the key that has been used before performing ECM replacement.

3. Maintain ignition switch in “ON” position for at least 5 seconds.

4. Turn ignition switch to “OFF”.

5. Start engine.
Can engine be started?

YES

>> Procedure is completed.

NO

>> Initialize control unit.Refer to CONSULT-III Operation Manual.

SEC-10

< FUNCTION DIAGNOSIS >

[INTELLIGENT KEY SYSTEM]

INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION

FUNCTION DIAGNOSIS

INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION

System Diagram

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System Description

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INPUT/OUTPUT SIGNAL CHART

SYSTEM DESCRIPTION 

• The engine start function of Intelligent Key system is a system that makes it possible to start and stop the

engine without removing the key. It verifies the electronic ID using two-way communications when pressing

the push-button ignition switch while carrying the Intelligent Key, which operates based on the results of

electronic ID verification for Intelligent Key using two-way communications between the Intelligent Key and

the vehicle.

NOTE:

The driver should carry the Intelligent Key at all times.

• Intelligent Key has 2 IDs [for Intelligent Key and for NVIS (NATS)]. It can perform the door lock/unlock oper-

ation and the push-button ignition switch operation when the registered Intelligent Key is carried.

• When the Intelligent Key battery is discharged, it can be used as emergency back-up by inserting the Intelli-

gent Key to the key slot. At that time, perform the NVIS (NATS) ID verification. If it is used when the Intelli-

gent Key is carried, perform the Intelligent Key ID verification.

• If the ID is successfully verified, and when push-button ignition switch is pressed, steering lock will be

released and starting the hybrid system will be possible.

• If the door lock/unlock operation is performed when the Intelligent Key battery is discharged, all doors lock/

unlock can be performed by operating the driver door key cylinder using the mechanical key set in the Intel-

ligent Key. 

• Intelligent Key can be registered with up to 4 keys on request from the owner.

NOTE:

ALKIA1392GB

Switch

Input signal to BCM

BCM function

Actuator

Push-button ignition switch

Push switch

Engine start function

• Steering lock relay
• Steering lock unit
• KEY warning lamp

ECVT device

P range

PNP switch

N, P range

Stop lamp switch

Brake ON/OFF

Each inside key antenna

Request signal

Remote keyless entry receiver

Key ID

Each door switch

Door open/close

ECM

Engine status signal

INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION

SEC-11

< FUNCTION DIAGNOSIS >

[INTELLIGENT KEY SYSTEM]

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• Refer to 

DLK-20, "INTELLIGENT KEY : System Description"

 for any functions other than hybrid system

start function of Intelligent Key system.

PRECAUTIONS FOR INTELLIGENT KEY SYSTEM

• In the Intelligent Key system of model L32, the transponder [the chip for NVIS (NATS) ID verification]

is integrated into the Intelligent Key. (For vehicles without Intelligent Key, it is integrated into the

mechanical key.) Therefore, the mechanical key cannot perform the ID verification, and thus it can-

not start the hybrid system. Instead, the NVIS (NATS) ID verification can be performed by inserting

the Intelligent Key into the key slot, and then it can start the hybrid system.

OPERATION WHEN INTELLIGENT KEY IS CARRIED

1. When the push-button ignition switch is pressed and brake pedal depressed, the BCM signals the inside

key antenna and transmits the request signal to the Intelligent Key.

2. The Intelligent Key receives the request signal and transmits the Intelligent Key ID signal to the BCM via

the remote keyless entry receiver.

3. The BCM receives the Intelligent Key ID signal and verifies it with the registered ID.
4. BCM transmits the steering lock unlock signal to steering lock unit and IPDM E/R if the verification results

are OK.

5. IPDM E/R turns the steering lock relay ON and supplies power to the steering lock unit.
6. Release of the steering lock will now occur.
7. BCM transmits the power supply stop signal to IPDM E/R when it confirms that the steering lock is in the

unlock condition.

8. IPDM E/R turns the steering lock relay OFF and stops power supply to the steering lock unit.
9. BCM turns ACC relay ON and transmits the ignition power supply ON signal to IPDM E/R.
10. IPDM E/R turns the ignition relay ON and starts the ignition power supply.
11. BCM confirms that the shift position is P.
12. BCM transmits the hybrid system start request signal via hardwire to Hybrid Vehicle Control ECU. If BCM

judges that the hybrid system start condition is satisfied.

CAUTION:

If a malfunction is detected in the Intelligent Key system, the “KEY” warning lamp in the combina-

tion meter illuminates. At that time, the engine cannot be started.

*: For the hybrid system start condition, refer to “PUSH-BUTTON IGNITION SWITCH OPERATION PROCE-

DURE”.

OPERATION RANGE

Hybrid system can be started when Intelligent Key is inside the vehicle. However, sometimes hybrid system

might not start when Intelligent Key is on instrument panel or in glove box.

OPERATION WHEN KEY SLOT IS USED

When the Intelligent Key battery is discharged, it performs the NVIS (NATS) ID verification between the inte-

grated transponder and BCM by inserting the Intelligent Key into the key slot, and then the hybrid system can

be started.

For details relating to starting the hybrid system using key slot, refer to 

SEC-15, "System Description"

.

BATTERY SAVER SYSTEM

When all the following conditions are met for 60 minutes, the battery saver system will cut off the power supply

to prevent battery discharge.

• The ignition switch is in the ACC position

• All doors are closed

• ECVT selector lever is in the P position

• No Intelligent Key malfunctions (Intelligent Key warning indicator is not ON)

Reset Condition of Battery Saver System

In order to prevent the battery from discharging, the battery saver system will cut off the power supply when all

doors are closed, the selector lever is on P position and the ignition switch is left on ACC position for 1 hour. If

any of the following conditions are met the battery saver system is released and the steering will change auto-

matically to lock position from OFF position.

• Opening any door

• Operating with request switch on door lock

• Operating with Intelligent Key on door lock

SEC-12

< FUNCTION DIAGNOSIS >

[INTELLIGENT KEY SYSTEM]

INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION

Press push-button ignition switch will change to ACC position from OFF position.

PUSH-BUTTON IGNITION SWITCH OPERATION PROCEDURE

The power supply position changing operation can be performed with the following operations.

NOTE:

• When an Intelligent Key is within the detection area of inside key antenna or when it is inserted to the key

slot, it is equivalent to the operations below.

• When starting the engine, the BCM monitors under the hybrid system start conditions,

- Brake pedal operating condition

- ECVT selector lever position

- Vehicle speed

- Steering lock condition

- Engine status

• Unless each condition is fulfilled, the hybrid system will not respond regardless of how many times the hybrid

system switch is pressed. At that time, illumination repeats the position in the order of LOCK

→AC-

C

→ON→OFF.

*1: When the ECVT selector lever position is N position, the engine start condition is different according to the vehicle speed.
• At vehicle speed of 4 km/h or less, the engine can start only when the brake pedal is depressed.
• At vehicle speed of 4 km/h or more, the engine can start even if the brake pedal is not depressed. (It is the same as “Engine stall

return operation while driving”.)

*2: When the ECVT selector lever position is in any position other than P position and when the vehicle speed is 5 km/h or more, the
engine stop condition is different.
• Press and hold the push-button ignition switch for 2 seconds or more. (When the push-button ignition switch is pressed for too short a

time, the operation may be invalid, so properly press and hold to prevent an incorrect operation.)

• Press the push-button ignition switch 3 times or more within 1.5 seconds. (Emergency stop operation)

Power supply position

Hybrid system start/stop condition

Push-button ignition switch op-

eration frequency

Brake pedal

ECVT selector lever position

LOCK 

→ ACC

Not depressed

Any position

1

LOCK 

→ ACC → ON

Not depressed

Any position

2

LOCK 

→ ACC → ON → 

OFF

Not depressed

Any position

3

LOCK 

→ START

ACC 

→ START

ON 

→ START

(Engine start)

Depressed

P(*1)

1

[If the switch is pressed once, 

the engine starts from any pow-
er supply position (LOCK, ACC, 

and ON)]

Engine is running 

→ 

OFF
(Engine stop)

—

Any position

(vehicle speed < 4 km/h)

1

Engine is running 

→ 

ACC
(Engine stop)

—

Any position other than P (*2)

1

Engine stall return oper-
ation while driving

—

P position

1