Nissan Altima L32. Manual - part 1317

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ENGINE START FUNCTION

PRECAUTIONS FOR REMOTE KEYLESS ENTRY SYSTEM

• In the remote keyless entry system of model L32, the transponder [the chip for NVIS (NATS) ID verifi-

cation] is integrated into the keyfob. (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 keyfob into the

key slot, and then it can start the engine.

OPERATION WHEN KEYFOB 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 keyfob.

2. The keyfob sends the request signal and transmits the keyfob ID signal to the BCM via the remote keyless

entry receiver.

3. The BCM receives the keyfob 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.
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 remote keyless entry system, the “KEY” warning lamp in the

combination 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 keyfob 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 keyfob is inside the vehicle. However, sometimes engine might not start when

keyfob is on instrument panel or in glove box.

OPERATION WHEN KEY SLOT IS USED

When the keyfob battery is discharged, it performs the NVIS (NATS) ID verification between the integrated

transponder and BCM by inserting the keyfob into the key slot, and then the engine can be started.

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

SEC-417, "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

• CVT selector lever is in the P position

• No remote keyless entry system failures (keyfob warning indicator is not ON)

Reset Condition of Battery Saver System

ENGINE START FUNCTION

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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 keyfob on door lock

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

STEERING LOCK OPERATION

Steering is locked by steering lock unit when ignition switch is in the OFF position, CVT selector lever is in the

P position and any of the following conditions are met.

• Opening door

• Closing door

• Door is locked with keyfob

PUSH-BUTTON IGNITION SWITCH OPERATION PROCEDURE

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

NOTE:

• When an keyfob 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 engine start conditions,

- Brake pedal operating condition

- CVT selector lever position

- Vehicle speed

- Steering lock condition

- Engine status

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

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

→ACC→ON→OFF.

*1: When the CVT selector lever position is N position, the engine start condition is different according to the vehicle speed.
• At vehicle speed of 4 km/h (2 MPH) or less, the engine can start only when the brake pedal is depressed.
• At vehicle speed of 4 km/h (2 MPH) 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 CVT selector lever position is in any position other than P position and when the vehicle speed is 5 km/h (3 MPH) 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

Engine start/stop condition

Push-button ignition switch op-

eration frequency

Brake pedal

CVT 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 or N position (*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 (2 MPH)

1

Engine is running 

→ 

ACC
(Engine stop)

—

Any position other than P (*2)

1

Engine stall return oper-
ation while driving

—

P position

1

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ENGINE START FUNCTION

Component Parts Location

INFOID:0000000004499051

ALKIA1747ZZ

ENGINE START FUNCTION

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Component Description

INFOID:0000000004499052

1.

Body control module M16, M17, M18, 
M19, M21
(view with instrument panel removed)

2.

IPDM E/R E17, E18, F10

3.

ECM E10

4.

Push button ignition switch M38

5.

Stop lamp switch E38
(view with lower driver instrument pan-
el removed)

6.

Electronic steering column lock M32

7.

Combination meter M24

8.

Remote keyless entry receiver M27
(view with instrument panel removed) 

9.

Key slot M40

10. Instrument panel antenna M49

(view with instrument panel removed)

11. Front console antenna M203

(bottom view of center console)

12.  Rear parcel shelf antenna B29

13. CVT device (park position switch) M23

14. Front door switch LH B8

RH B108

15. Rear door switch LH B18

RH B116

16. Park neutral position (PNP) switch F25

Component Reference

BCM

SEC-498

Steering lock unit

SEC-488

Push-button ignition switch

SEC-463

Door switch

DLK-293

CVT device (park position switch)

SEC-467

Inside key antenna

DLK-283

Remote keyless entry receiver

DLK-337

Stop lamp switch

SEC-461

Park/neutral position switch

SEC-475

Steering lock relay

SEC-440

Starter relay

SEC-447

Starter control relay

SEC-445

Security indicator

SEC-514

Key warning lamp

SEC-513