2003 NISSAN TEANA engine

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INTELLIGENT KEY SYSTEM

System DescriptionBIS000WZ

The Intelligent Key system is a system that makes it possible to lock and unlock the door locks (door lock
function) and start the engine (engine start function) by carrying around the Intelligent Key, which operates
based on the results of electrical key-ID verification using two-way communications between the Intelli-
gent Key and the vehicle

Operation of the remote control buttons on the Intelligent Key also provides the same functions as the
remote keyless entry system. (Remote keyless entry functions)

As an ignition key warning function, when a door lock is locked or unlocked with request switch or remote
controller button operation, the hazard lamps flash and the Intelligent Key warning buzzer sounds.

Even if the Intelligent Key battery runs down, the door locks can be locked and unlocked and the engine
started with the mechanical key built into the Intelligent Key.

If an Intelligent Key is lost, a new Intelligent Key can be registered. A maximum of 4 Intelligent Keys can
be registered.

It has been made possible to diagnose the system, change the function setting and register an Intelligent
Key with the CONSULT-II.
DOOR LOCK/UNLOCK, TRUNK OPEN FUNCTION
Operation Description

When the driver door, passenger door, or trunk open request switch is pressed, Intelligent Key unit sends
a request signal from the outside key antenna corresponding to the pressed request switch, key-ID verifi-
cation is performed using two-way communication with Intelligent Key, and if ID is successfully verified, a
door lock/unlock request signal is sent to BCM using CAN communication to lock/unlock the door lock.

When door is locking, door is unlocked, when door is unlocking, door is locked.

When door lock is locked/unlocked by door request switch operation, hazard lamps flash and Intelligent
Key warning buzzer sounds.

With the locking operation of door request switch, door lock actuators of all door are locked.

When trunk open request switch is pushed, trunk lid is opened.
Operation Condition
Auto Door Lock Function
After the door request switch in the driver or passenger door is operated and the vehicle door locks are
unlocked, all the doors are automatically locked unless the mechanical key is inserted into the ignition knob,
the ignition knob is pressed, any door request switch is pressed, any one of the doors is opened, or an Intelli-
gent Key remote control button is operated within 2 minutes.
Hazard Reminder Function
The hazard lamps are flashed when the door lock is locked or unlocked by door request switch operation.
When ignition switch ON or any door is opened, key reminder function is not operate.
Request switch operation Operating conditions
Request switch (Driver side) When all the conditions below are met

All doors are closed (for lock operation)

Remove mechanical key from ignition key cylinder (key switch: OFF)

Ignition knob is not press (ignition knob switch: OFF)

The Intelligent Key is in the outside key antenna detection area for the door for which
the door request switch was operated. Request switch (passenger side)
Request switch (trunk lid)When all the conditions below are met

The Intelligent Key is in the antenna detection area for the outside key antenna (rear
bumper).

When the Intelligent Key is detection for the Inside Key antenna, but another Intelli-
gent Key is detected for the outside key antenna.
Vehicle operation Hazard lamp
Door unlock operation Twice
Door lock operationOnce

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INTELLIGENT KEY SYSTEM

Hazard Reminder Function
The hazard lamps are flashed when the door lock is locked or unlocked by remote controller button.
When ignition switch ON or any door is opened, key reminder function is not operate.
List of Operation Related Parts
Parts marked with × are the parts related to operation.
ENGINE START FUNCTION
Operation Description

When ignition knob is pressed, Intelligent Key unit sends request signal from inside key antenna, key-ID
verification is performed with Intelligent Key using two-way communication, and if verification is success-
ful, an ignition rotation prohibition latch release signal is sent to steering lock unit. Steering lock unit
releases ignition knob rotation prohibition latch. (Ignition knob can now be turned.)

When it becomes possible to rotate the ignition knob, “KEY” warning lamp in combination meter lights up
green to notify driver that ignition knob can be turned.
NOTE:
When it becomes impossible to rotate the ignition knob, “KEY” warning lamp in combination meter lights
up red.

When key-ID verification is successful, Intelligent Key unit uses CAN communication to send engine start
permission signal to BCM.

When BCM receives engine start permission signal, it uses CAN communication to sent starter request
signal to IPDM E/R so that the engine will start when ignition knob is rotated to START position.
Operation Range
Engine can be started when Intelligent Key is in the vehicle. However, sometimes engine might not start when
Intelligent Key is on instrument panel, rear parcel shelf, trunk room or in glove box.
Unlock
Remove mechanical key from ignition key cylinder (key switch: OFF)

Ignition knob is not press (ignition knob switch: OFF)
Trunk open

Remove mechanical key from ignition key cylinder (key switch: OFF)

Ignition knob is not press (ignition knob switch: OFF)

When trunk button pressed more than 0.5 seconds Remote controller button operation Operating condition
Vehicle operation Hazard lamp
Door unlocking operation Twice
Door locking operation Once
Remote keyless entry functions
Intelligent Key
Key switch
Ignition knob switch
Door unlock sensor
Door switch
Trunk room lamp switch
Door lock actuator
Trunk lid opener actuator
Intelligent Key unit
CAN communication system
BCM
Combination meter
Hazard warning lamp
Door lock function by the remote control button××××× × ×××
Trunk open function by the remote control button××× × ××××
Hazard reminder function (Door lock)×××××

INTELLIGENT KEY SYSTEM
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Active Check Function
Confirm whether or not ignition knob can be rotated by checking the color of warning lamp in combination
meter.
List of Operation Related Parts
Parts marked with × are the parts related to operation.
WARNING AND ALARM FUNCTION
Operation Description
The warnings and alarms are as follows and are given to the user as warning information and warnings using
combinations of Intelligent Key warning buzzer (in driver door and passenger door), inside vehicle buzzer (in
combination meter), and warning lamps “KEY” and “LOCK.”

Ignition switch return forgotten warning
With the ignition in OFF or ACC position, if the driver door is opened, this warning is issued.

Key left in ignition warning (when mechanical key used)
With the mechanical key in the ignition knob and the ignition switch is in the OFF, ACC, or LOCK position,
if the driver door is opened, this warning is issued.

Ignition switch OFF position warning (for inside car: when door closed)
This warning is issued when the user forgets to return the ignition knob to the LOCK position.

Ignition switch OFF position warning (for outside car: when door opened/closed)
This warning is issued when the user leaves the car without returning the ignition knob to the LOCK posi-
tion.

Warning for removal of Intelligent Key to outside the car (when door open/closed)
This warning is issued if the Intelligent Key is taken outside the car while the engine is running.

Warning for removal of Intelligent Key to outside the car (from window)
This warning is issued if the Intelligent Key is taken outside the car through a window while the engine is
running.

Door lock non-operation warning
This warning is issued if the door lock (lock) operation by a door request switch is not effected.

Intelligent Key low battery warning
This warning is issued when it is detected that the battery in the Intelligent Key has been used up.
Condition Operation
Ignition knob rotation possible “KEY” warning lamp in combination meter is lit up green.
Ignition knob rotation not possible “KEY” warning lamp in combination meter is lit up red.
Engine start functions
Intelligent Key
Key switch
Ignition knob switch
Inside key antenna
Intelligent Key unit
CAN communication system
BCM
Combination meter
IPDM E/R
NATS antenna amp.
Steering lock unit
Engine start function by the Intelligent Key××××××××× ×
Engine start function by the mechanical key× ×××××××
Active check function× ×××× ×

BL-76
INTELLIGENT KEY SYSTEM

CHANGE SETTINGS FUNCTION
The settings for each function can be changed with the CONSULT-II or Intelligent Key operation.
Changing Settings With the Intelligent Key
Intelligent Key remote controller button and door request switch operations change the engine startup function
settings (startup enabled/disabled) for each Intelligent Key independently.
Settings Change Procedure
1. With the ignition switch is in the LOCK position (ignition knob not pressed), hold down both the LOCK and
UNLOCK remote control buttons on the Intelligent Key at the same time for at least 10 seconds (The yard-
stick is that the Intelligent Key LED flashes 20 times.)
2. Within 5 seconds of releasing the Intelligent Key remote controller buttons, press the driver door request
switch.
3. The KEY warning lamp in combination meter lights up for 3 seconds (engine starting enabled → starting
disabled: lights up red, engine starting disabled → flashes green). This completes the settings change.
Changing Settings Using CONSULT-II
The settings for the Intelligent Key system functions can be changed using CONSULT-II (WORK SUPPORT).
Refer to BL-94, "
WORK SUPPORT" .
NOTE:
Once a function setting is changed, it will remain effective even if the battery is disconnected.
INTELLIGENT KEY REGISTRATION
Intelligent Key-ID registration is performed using the CONSULT-II. Up to 4 can be registered.
CAUTION:

After a new Intelligent Key-ID is registered, be sure to check the function.

When registering an additional Intelligent Key-ID, take any Intelligent Keys already registered and
Intelligent Keys for any other vehicles out of the vehicle before starting.
CONSULT-II can be used to check and delete Intelligent Key-IDs.
For future information, see the CONSULT-II Operation Manual NATS.
Door lock non-operation warning× × ××××××××××
Intelligent Key low battery warning×××××× Warning and alarm functions
Intelligent Key
Key switch
Ignition knob switch
Intelligent Key unit ignition switch ACC position input signal
Intelligent Key unit ignition switch ON position input signal
Door switch
Door request switch
Door lock actuator
Inside key antenna
Outside key antenna (Driver, Passenger)
Outside key antenna (rear bumper)
Intelligent Key warning buzzer
Intelligent Key unit
CAN communication system
BCM
Combination meter

BL-92
INTELLIGENT KEY SYSTEM

ENGINE START FUNCTION DIAGNOSTIC PROCEDURE
*7:BL-96*8:BL-98*9:BL-70
*10:BL-99*11:BL-98
PIIB1050E
PIIB1051E

INTELLIGENT KEY SYSTEM
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CONSULT-II Functions (INTELLIGENT KEY)BIS001TD
CONSULT-II can display each diagnostic item using the diagnostic test modes as shown below.
CONSULT-II Inspection ProcedureBIS001TE
CAUTION:
If CONSULT-II is used with no connection CONSULT-II CONVERTER, malfunctions might be detected
in self-diagnosis depending on control unit which performs CAN Communication.
BASIC OPERATION
Refer to GI-34, "CONSULT-II Start Procedure" .
CONSULT-II Application ItemsBIS001TF
SELF-DIAGNOSTIC RESULTS
*: It is possible to display it only with the program card for engine immobilizer system.
DATA MONITOR
Part to be diagnosed Test item, Diagnosis mode Description
Intelligent KeyWORK SUPPORT Changes settings for each function.
SELF-DIAG RESULTS Intelligent Key unit performs CAN communication diagnosis.
DATA MONITOR Displays Intelligent Key unit input data in real time.
CAN DIAGNOSTIC SUPPORT
MONITORThe results of transmit/receive diagnosis of CAN Communication can
be read.
ACTIVE TESTOperation of electrical loads can be checked by sending driving signal
to then.
ECU PART NUMBER Displays Intelligent Key unit part No.
DTC Self-diag results Description Diagnosis procedureReference
page
U1000 CAN COMM CIRCUITMalfunction is detected in CAN communica-
tion.Check CAN communica-
tion system.BL-100
U1010 CONTROL UNIT (CAN) Intelligent Key unit internal malfunctionCheck CAN communica-
tion system.BL-100
B2013*STRG COMM CIRCUITMalfunction is detected in communication of
Intelligent Key unit and steering lock unit.Check steering lock unit.BL-115
B2552*INTELLIGENT KEY Intelligent Key unit internal malfunctionReplace Intelligent Key
unit.BL-117
B2590*DISCORD BCM - I-KEY Malfunction is detected in immobilizer system. Check NATS.BL-139
Monitor item Content
PUSH SW Indicates [ON/OFF] condition of ignition knob switch.
KEY SW Indicates [ON/OFF] condition of key switch.
DR REQ SW Indicates [ON/OFF] condition of door request switch (driver side).
AS REQ SW Indicates [ON/OFF] condition of door request switch (passenger side).
BD/TR REQ SW Indicates [ON/OFF] condition of trunk opener request switch.
IGN SW Indicates [ON/OFF] condition of ignition switch in ON position.
ACC SW Indicates [ON/OFF] condition of ignition switch in ACC position.
DOOR STAT SW Indicates [ON/OFF] condition of stop lamp switch.
STOP LAMP SW Indicates [ON/OFF] condition of door unlock sensor.
P RANGE SW* Indicates [ON/OFF] condition of park position switch.
DOOR LOCK SIG* Indicates [ON/OFF] condition of door lock signal from Intelligent Key remote controller button.
DOOR UNLOCK SIG* Indicates [ON/OFF] condition of door unlock signal from Intelligent Key remote controller button.
KEYLESS TRUNK* Indicates [ON/OFF] condition of trunk open signal from Intelligent Key remote controller button.

INTELLIGENT KEY SYSTEM
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ACTIVE TEST
ENGINE START BY I-KEYEngine start function mode can be changed to operate (ON) or not operate (OFF) with this mode.
The operation mode will be changed when “CHANGE SETT” on CONSULT-II screen is touched.
LOCK/UNLOCK BY I-KEYDoor lock/unlock function by door request switch (driver side, passenger side and trunk) mode
can be changed to operate (ON) or not operate (OFF) with this mode. The operation mode will be
changed when “CHANGE SETT” on CONSULT-II screen is touched. Monitor item Description
Test item Description
DOOR LOCK/UNLOCKThis test is able to check door lock/unlock operation.

The all door lock actuators are unlocked and hazard warning lamps flash twice when “ALL
UNLK” on CONSULT-II screen is touched.

The all door lock actuators are locked and hazard warning lamps flash once when “LOCK” on
CONSULT-II screen is touched.
ANTENNAThis test is able to check Intelligent Key antenna operation.
When the following conditions are met, hazard warning lamps flash.

Inside key antenna (Instrument center lower) detects Intelligent Key, when “RM ANT1” on
CONSULT-II screen is touched.

Inside key antenna (Center console) detects Intelligent Key, when “RM ANT2” on CONSULT-II
screen is touched.

Inside key antenna (Trunk room) detects Intelligent Key, when “LAG ANT” on CONSULT-II
screen is touched.

Outside key antenna (Driver side) detects Intelligent Key, when “DR ANT” on CONSULT-II
screen is touched.

Outside key antenna (Passenger side) detects Intelligent Key, when “AS ANT” on CONSULT-II
screen is touched.

Outside key antenna (Rear bumper) detects Intelligent Key, when “BD ANT” on CONSULT-II
screen is touched.
OUTSIDE BUZZERThis test is able to check Intelligent Key warning buzzer (driver side/ trunk room) operation.
Intelligent Key warning buzzer (driver side/ trunk room) sounds when “ON” on CONSULT-II
screen is touched.
INSIDE BUZZERThis test is able to check Intelligent Key warning buzzer (combination meter) operation.

Take away warning chime sounds when “TAKE OUT” on CONSULT-II screen is touched.

Ignition switch warning chime sounds when “KNOB” on CONSULT-II screen is touched.

Ignition key warning chime sounds when “KEY” on CONSULT-II screen is touched.
INDICATORThis test is able to check warning lamp operation.

“KEY” Warning lamp (Green) illuminates when “BLUE ON” on CONSULT-II screen is touched.

“KEY” Warning lamp (Red) illuminates when “RED ON” on CONSULT-II screen is touched.

“LOCK” Warning lamp illuminates when “KNOB ON” on CONSULT-II screen is touched.

“KEY” Warning lamp (Green) flashes when “BLUE IND” on CONSULT-II screen is touched.

“KEY” Warning lamp (RED) flashes when “BLUE IND” on CONSULT-II screen is touched.

“LOCK” Warning lamp flashes when “KNOB ON” on CONSULT-II screen is touched.

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INTELLIGENT KEY SYSTEM

HAZARD REMINDER FUNCTION MALFUNCTION
NOTE:

Before performing the diagnosis in the following table, check “Diagnosis Procedure”. Refer to BL-91,
"Diagnosis Procedure" .

Make sure that vehicle is under the condition shown in “Conditions of vehicle” before starting diagnosis,
and check each symptom.

If the following “symptoms” are detected, check systems shown in the “Diagnoses service procedure” col-
umn in this order.
Conditions of Vehicle (Operating Conditions)

Intelligent key function (I-KEY FUNCTION) is ON when setting on CONSULT-II.

Key reminder function (ANSWER BACK FUNCTION) is ON when setting on CONSULT-II.

Mechanical key is not inserted into ignition knob.

Ignition knob is not depressed.

All doors are closed.
ENGINE START FUNCTION MALFUNCTION
Intelligent Key Operation Inspection
NOTE:

Before performing the diagnosis in the following table, check “Diagnosis Procedure”. Refer to BL-91,
"Diagnosis Procedure" .

Make sure that vehicle is under the condition shown in “Conditions of vehicle” before starting diagnosis,
and check each symptom.

If the following “symptoms” are detected, check systems shown in the “Diagnoses service procedure” col-
umn in this order.
Conditions of Vehicle (Operating Conditions)

Intelligent key function (I-KEY FUNCTION) is ON when setting on CONSULT-II.

Mechanical key is not inserted into ignition knob.

There is one or more registered Intelligent Key in the detection area of inside key antenna.
Mechanical Key Operation Inspection
NOTE:

Before performing the diagnosis in the following table, check “Diagnosis Procedure”. Refer to BL-91,
"Diagnosis Procedure" .

Make sure that vehicle is under the condition shown in “Conditions of vehicle” before starting diagnosis,
and check each symptom.
Symptom Diagnoses service procedure Reference page
Hazard lamps do not flash during door lock
operation using Intelligent Key. (regardless of
whether Intelligent Key remote controller button
or request switch operation is used)1. Check key reminder settingBL-94
2. Replace BCMBCS-16
3. Replace Intelligent Key unitBL-117
Symptom Diagnoses service procedure Reference page
Ignition knob can not turn
This illuminate KEY warning lamp on com-
bination meter in red when ignition knob is
pressed.1. Check inside key antennaBL-114
2. Replace Intelligent Key unitBL-117
This illuminate KEY warning lamp on com-
bination meter in green when ignition knob
is pressed.Check steering lock unitBL-115
Ignition knob turns even without both Intelli-
gent Key and mechanical key.Replace steering lock unit —
This is not illuminate KEY warning lamp on
combination meter when ignition knob is
pressed.1. Check ignition knob switchBL-103
2. Check key switch (Intelligent Key unit input)BL-101
3. Replace Intelligent Key unitBL-117