Nissan Maxima. Instruction — part 1046
INSPECTION AND ADJUSTMENT
SEC-9
< BASIC INSPECTION >
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INSPECTION AND ADJUSTMENT
ECM RE-COMMUNICATING FUNCTION
ECM RE-COMMUNICATING FUNCTION : Description
INFOID:0000000010051898
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 is not necessary)
NOTE:
• When registering new Key IDs or replacing the ECM that is not brand new, refer to CONSULT Immo-
bilizer mode and follow the on-screen instructions.
• 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:0000000010051899
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 Immobilizer mode and follow the on-screen instructions.
SEC-10
< SYSTEM DESCRIPTION >
INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
SYSTEM DESCRIPTION
INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
System Diagram
INFOID:0000000010051900
System Description
INFOID:0000000010051901
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.
• When the push-button ignition switch is pressed the ID will be verified. If the ID is successfully verified, start-
ing 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.
• Intelligent Key system can register up to 4 keys (Including the standard Intelligent Key) on request from the
owner.
NOTE:
AWKIA1698GB
Switch
Input signal to BCM
BCM function
Actuator
Push-button ignition switch
Push switch
Engine start function
• Starter relay (IPDM E/R)
• Starter control relay (IPDM E/
R)
• Starter motor
• KEY warning lamp
CVT shift selector
P range
TCM
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
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< SYSTEM DESCRIPTION >
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• Refer to
DLK-24, "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 A35, 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 sends 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 turns ACC relay ON and transmits the ignition power supply ON signal to IPDM E/R.
5. IPDM E/R turns the ignition relay ON and starts the ignition power supply.
6. BCM confirms that the shift position is P or N.
7. 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.
8. IPDM E/R turns the starter control relay ON when receiving the starter request signal.
9. 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.
10. 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
.
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 Intelligent Key failures (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 in P position and the ignition switch is left in ACC position for 1 hour. If
any of the following conditions are met, the battery saver system is released:
• Opening any door
• Operating with request switch on door lock
SEC-12
< SYSTEM DESCRIPTION >
INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
• Operating with Intelligent Key on door lock
Press push-button ignition switch and 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 engine start conditions.
- Brake pedal operating condition
- CVT selector lever position
- Vehicle speed
- 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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