Nissan Altima L32. Manual - part 1216

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< BASIC INSPECTION >

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PRE-INSPECTION FOR DIAGNOSTIC

>> GO TO 2

2.

CHECK SECURITY INDICATOR LAMP

1. Lock doors using Intelligent Key or mechanical key.

2. Check that security indicator lamp illuminates for 30 seconds.
Security indicator lamp should illuminate.

OK

>> GO TO 3

NG

>> Perform diagnosis and repair. Refer to 

SEC-124, "Component Function Check"

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3.

CHECK ALARM FUNCTION

1. After 30 seconds, security indicator lamp will start to blink.

2. Open any door or hood before unlocking with Intelligent Key or mechanical key, or open trunk lid without

Intelligent Key or mechanical key.

Do alarm function properly.

OK

>> GO TO 4

NG

>> Check the following.

• The vehicle security system does not phase in alarm mode. Refer to 

SEC-205, "Symptom

Table"

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• Alarm (horn, headlamp and hazard lamp) do not operate. Refer to 

SEC-205, "Symptom Table"

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4.

CHECK ALARM CANCEL OPERATION

Unlock any door or open trunk lid using Intelligent Key or mechanical key.
Alarm (horn, headlamp and hazard lamp) should stop.

OK

>> Inspection End.

NG

>> Check door lock function. Refer to 

DLK-25, "INTELLIGENT KEY : System Description"

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INSPECTION AND ADJUSTMENT

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< BASIC INSPECTION >

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INSPECTION AND ADJUSTMENT

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

INFOID:0000000004205987

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.

• 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

INFOID:0000000004205988

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-16

< FUNCTION DIAGNOSIS >

[COUPE]

INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION

FUNCTION DIAGNOSIS

INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION

System Diagram

INFOID:0000000004205989

System Description

INFOID:0000000004205990

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 initiating the engine 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. 

ALKIA1292GB

Switch

Input signal to BCM

BCM function

Actuator

Push-button ignition switch

Push switch

Engine start function

• Steering lock relay
• Steering lock unit
• Starter relay (IPDM E/R)
• Starter control relay (IPDM E/

R)

• Starter  motor
• KEY warning lamp

CVT device (CVT models)

P range

PNP switch (CVT models)

N, P range

Clutch interlock switch (M/T mod-
els)

Clutch ON/OFF

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

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• Intelligent Key can be registered up to 4 keys (Including the standard Intelligent Key) on request from the

owner.

NOTE:

• Refer to 

DLK-25, "INTELLIGENT KEY : System Description"

 for any functions other than engine start func-

tion 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 the conventional models, it is integrated into the mechani-

cal key.) Therefore, the mechanical key cannot perform the ID verification, and thus it cannot start

the engine. Instead, the NVIS (NATS) ID verification can be performed by inserting the Intelligent Key

into the key slot, and then it can start the engine.

OPERATION WHEN INTELLIGENT KEY IS CARRIED

1. When the push-button ignition switch is pressed and brake pedal is 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.
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 or N (CVT models).
12. BCM transmits the starter request signal via CAN communication to IPDM E/R and turns the starter relay

in IPDM E/R ON if BCM judges that the engine start condition is satisfied.

13. IPDM E/R turns the starter control relay ON when receiving the starter request signal.
14. Battery power is supplied through the starter relay and the starter control relay to operate the starter motor

and to start the cranking.

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.

15. When BCM received feedback signal from ECM acknowledging the engine has been initiated, the BCM

transmits a stop signal to IPDM E/R and stops the cranking by turning OFF the starter motor relay. (If the

engine initiating has failed, the cranking will stop automatically within 5 seconds.)

CAUTION:

When the Intelligent Key is carried outside of the vehicle (inside key antenna detection area) with

the power supply in ACC or ON position, even if the engine start condition* is satisfied, the engine

cannot be started.

*: For the engine start condition, refer to “PUSH-BUTTON IGNITION SWITCH OPERATION PROCEDURE”.

OPERATION RANGE

Engine can be started when Intelligent Key is inside the vehicle. However, sometimes engine 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 engine can be

started.

For details relating to starting the engine using key slot, refer to 

SEC-22, "System Description"

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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.