2006 INFINITI M35 Starter

INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
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Revision: 2006 January2006 M35/M45
PRECAUTIONS FOR INTELLIGENT KEY SYSTEM
In the Intelligent Key system of model Y50, the transponder (the chip for immobilizer ID verifica-
tion) is integrated into the Intelligent Key. (For the conventional models, it is integrated into the
mechanical key.) Therefore, the mechanical key cannot perform the ID verification, and thus it can-
not start the engine. Instead of it, the immobilizer ID verification can be performed by inserting the
Intelligent Key into the key slot, and then it can start the engine.
When registering the Intelligent Key, 2 registration procedures (immobilizer ID registration and
Intelligent Key ID registration) should be performed. The immobilizer ID registration is the proce-
dure that registers the ID stored into the transponder (integrated into Intelligent Key) to the BCM.
The Intelligent Key ID registration is the procedure that registers the ID to the Intelligent Key unit.
Each registration is a different procedure.
When performing the Intelligent Key ID registration only, the engine cannot be started by inserting
the key into the key slot. When performing the engine immobilizer ID registration only, the engine
cannot be started by the operation when carrying the key. The registrations of both systems
should be performed.
Operation DescriptionNIS001Y9
SYSTEM DIAGRAM
OPERATION WHEN INTELLIGENT KEY IS CARRIED
Description
1. When the push-button switch is pressed, the Intelligent Key unit signals the inside key antenna and sends
the request signal to the Intelligent Key.
2. The Intelligent Key receives the request signal and sends the Intelligent Key ID signal to the Intelligent
Key unit via the remote keyless entry receiver.
3. The Intelligent Key receives the Intelligent Key ID signal and verifies it with the registered ID.
4. If the ID is successfully verified, the Intelligent Key unit sends the steering unlock signal to the steering
lock unit. Then, it sends each power supply request signal to PDU (Power Distribution Unit) after unlock-
ing the steering lock.
5. If the Intelligent Key unit judges that the engine start condition is satisfied, it sends the starter request sig-
nal via CAN communication to IPDM E/R and turns the starter motor relay ON.
6. The steering lock unit unlocks the steering lock when receiving the signal. PDU starts the power supply
distribution according to the push-button ignition switch operation when receiving the signal. If it enters the
engine start permission mode, the power supply is supplied from PDU to the starter motor relay and the
cranking is started.
CAUTION:
If a malfunction is detected in the Intelligent Key system, the “KEY” warning lamp in the combina-
tion meter illuminates for 15 seconds. At that time, the engine cannot be started.
7. When Intelligent Key unit received feedback signal from ECM acknowledging the engine has been initi-
ated, the Intelligent Key unit sends a stop signal to IPDM E/R and stops the cranking by turning OFF the
PIIB6272E

BL-130
INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
Revision: 2006 January2006 M35/M45
starter motor relay. (If the engine initiating has failed, the cranking will stop automatically within 5 sec-
onds.)
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 BL-130, "
PUSH-BUTTON IGNITION SWITCH OPERATION PROCE-
DURE" .
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 immobilizer 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 BL-248, "
IVIS (INFINITI VEHICLE IMMOBI-
LIZER SYSTEM-NATS)" .
PUSH-BUTTON IGNITION SWITCH OPERATION PROCEDURE
The power supply position changing operation can be performed with the following operation.
NOTE:
When an Intelligent Key is within the detection area of inside key antenna and when it is inserted to the
key slot, it is equivalent to the operations below.
When starting the engine, the Intelligent Key unit monitors the engine start conditions (brake pedal operat-
ing condition, A/T selector lever position, and vehicle speed).
Unless each start condition is fulfilled, the engine will not respond regardless of how many times the
engine switch is pushed. At that time, illumination repeats the position in the order of LOCK
AC-
C
ONLOCK.
Power supply positionEngine start/stop condition
Push-button ignition switch
operation frequency
Brake pedal A/T selector lever position
LOCK
ACCNot depressed
(When A/T selector lever is in any
position other than P or N, there
will be no effect even if it is
depressed.)Any position other than P or N
(When the brake pedal is not
depressed, there will be no effect
even if the A/T selector lever is in
P or N position.)1
LOCK
ACC ONNot depressed
(When A/T selector lever is in any
position other than P or N, there
will be no effect even if it is
depressed.)Any position other than P or N
(When the brake pedal is not
depressed, there will be no effect
even if the A/T selector lever is in
P or N position.)2
LOCK
ACC ON
LOCKNot depressed
(When A/T selector lever is in any
position other than P or N, there
will be no effect even if it is
depressed.)Any position other than P or N
(When the brake pedal is not
depressed, there will be no effect
even if the A/T selector lever is in
P or N position.)3
LOCK
START
ACC
START
ON
START
(Engine start)Depressed P or N position (*1)1
[If the switch is pushed once,
the engine starts from any
power supply position (LOCK,
ACC, and ON)]
Engine is running

LOCK
(Engine stop)— P position 1

BL-144
INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
Revision: 2006 January2006 M35/M45
10 VPush-button ignition
switch ON indicatorONPush-button ignition switch is in ON
position0
—Push-button ignition switch is in any
position
(Except ON position)1.2
11 P Stop lamp switch —Brake pedal depressed Battery voltage
Brake pedal released Battery voltage
12 L/RPush-button ignition
switch illumination—Push-button ignition switch illumina-
tion is turned on2.6
Push-button ignition switch illumina-
tion is turned off
(15 seconds or more after the driver
door is closed)0
13 LG/B Key slot illumination LOCKInsert Intelligent Key into key slot and
driver side door is open.Battery voltage
Remove Intelligent Key from key slot. 0
15 LGSteering lock unit
power sourceLOCK — Battery voltage
16 P/BSteering lock unit sig-
nalLOCK Steering lock: Lock Battery voltage
ACC
Steering lock: Unlock
(Unlocked moment)0
NO 0
17 OSteering lock unit con-
dition signal-1LOCK Steering lock: Lock 0
ACC
Steering lock: UnlockBattery voltage
ON Battery voltage
18 L/YSteering lock unit con-
dition signal-2LOCK Steering lock: Lock Battery voltage
ACC
Steering lock: Unlock0
ON 0
19 BR/Y Key switch signal LOCKInsert Intelligent Key into key slot. 0
Remove Intelligent Key from key slot Battery voltage
20 B Ground — — 0
27 VA/T device (Detention
switch)LOCK A/T selector lever is in P position 0
ON Other than above Battery voltage
28 SB Starter relayON A/T selector lever is in N or P position Battery voltage
—Ignition switch position is in LOCK
position or A/T selector lever is in any
position other than N or P position0
29 V/R Stop lamp switch —Brake pedal depressed Battery voltage
Brake pedal released 0
30 L/WIgnition power supply
(ACC)ACCIgnition switch position is in ACC or
ON positionBattery voltage
31 GRIgnition power supply
(ON)ONIgnition switch position is in ON or
START positionBattery voltage
33 O PDU signalLOCK Steering lock: Lock 0
ACC Steering lock: Unlock 8 Te r m i -
nal
No.Wire
color
ItemCondition
Voltage (V)
(Approx.) Push-
button
ignition
switch
positionOperation or conditions

INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
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Revision: 2006 January2006 M35/M45
34 R PDU feed back signalLOCKSleep condition (30 seconds or more
after all doors are closed under the
condition that the ignition switch posi-
tion is in the LOCK position)1
—Wake-up condition (any condition
other than above)0
35 LG Vehicle speed signal ONAt speedometer operation (vehicle
speed approx. 40 km/h)
37 P CAN-L — — —
38 L CAN-H — — —
39 BR/WPush-button ignition
switch—Push-button ignition switch is pressed 0
Push-button ignition switch is released Battery voltage
40 B Ground — — 0
41 Y Power source (fuse) — — Battery voltage
42 P PDU wake up signalLOCKSleep condition (30 seconds or more
after all doors are closed under the
condition that the ignition switch posi-
tion is in the LOCK position)Battery voltage
— Wake-up condition (Open driver door) 0
43 G Starter signalON At starter motor cranking 0
— Any condition other than above Battery voltage
46 VSteering lock control
signal-1—Push-button ignition switch is pressed
under the condition that Intelligent Key
is in the vehicle or Intelligent Key is
insertedBattery voltage
LOCKIgnition switch position is in LOCK
position (Steering lock activated)Battery voltage
0 Battery voltage
(Battery voltage is detected when acti-
vating the steering lock)
47 LGInside key antenna (+)
signal
(Instrument center)
LOCK Any door open
closed
(Door switch: ON
OFF)
48 VInside key antenna (–)
signal
(Instrument center)
49 BInside key antenna (+)
signal
(console)
LOCKAny door open
closed
(Door switch: ON
OFF)
50 WInside key antenna (–)
signal
(console) Te r m i -
nal
No.Wire
colorItemCondition
Voltage (V)
(Approx.) Push-
button
ignition
switch
positionOperation or conditions
PKIA1935E
SIIA1910J
SIIA1910J

INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
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Revision: 2006 January2006 M35/M45
Terminals and Reference Value for BCMNIS001YG
Terminals and Reference Value for IPDM E/RNIS001YH
6 B Ground — — 0
7 LG Power source LOCK — Battery voltage
8 L/Y Condition signal-2LOCK Steering lock: Lock Battery voltage
ACC
Steering lock: Unlock0
ON 0 Termi-
nal
No.Wire
colorItemCondition
Voltage (V)
(Approx.) Push-
button
ignition
switch
positionOperation or conditions
Te r m i -
nal
No.Wire
colorItemCondition
Voltage (V)
(Approx.) Push-but-
ton igni-
tion
switch
positionOperation or conditions
23 W/V Security indicator LOCKIntelligent Key is removed from key
slot and power supply position is in
LOCK positionBattery voltage
0
(Every 2.4 seconds)
37 LGKey slot
(Key switch signal)LOCKIntelligent Key is removed from key
slot0
Intelligent Key is inserted into key slot Battery voltage
38 WIgnition power supply
(ON or START)ONPower supply position is in ON posi-
tionBattery voltage
39 L CAN-H — — —
40 P CAN-L — — —
42 P Power source (fuse) — — Battery voltage
52 B Ground — — 0
55 WPower source (Fusil-
lade link)— — Battery voltage
Te r -
minal
No.Wire
ColorItemCondition
Voltage (V)
(Approx.) Push-
button
ignition
switch
positionOperation or conditions
4W/RStarter motor power
supplyLOCK — 0
START Starter motor is activating Battery voltage
49 L CAN H — — —
50 P CAN L — — —
53 GR/R Shift position signalONA/T selector lever is in N or P
positionBattery voltage
LOCKA/T selector lever is in any
position other than P and N
position0

BL-148
INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
Revision: 2006 January2006 M35/M45
Terminals and Reference Value for PDUNIS001YI
Te r -
minal
No.Wire
colorItemCondition
Voltage (V)
(Approx.) Push-
button
ignition
switch
positionOperation or conditions
1 P Wake up signalLOCKSleep condition (30 seconds or more
after all doors are closed under the con-
dition that the power supply position is in
the LOCK position)Battery voltage
— Wake-up condition (Open driver door) 0
2 G Starter control signalON At starter motor cranking 0
— Any condition other than above Battery voltage
3GRSteering lock unit
power sourceLOCKPush-button ignition switch is pressed
under the condition that Intelligent Key is
in the vehicle or Intelligent Key is inserted0
Battery voltage 0
— Any condition other than above 0
6VSteering lock control
signal-1—Push-button ignition switch is pressed
under the condition that Intelligent Key is
in the vehicle or Intelligent Key is insertedBattery voltage
LOCKPower supply position is in LOCK posi-
tion
(Steering lock activated)Battery voltage
0 Battery volt-
age
(Battery voltage is detected when
activating the steering lock)
7LGSteering lock control
signal-2—Push-button ignition switch is pressed
under the condition that Intelligent Key is
in the vehicle or Intelligent Key is insertedBattery voltage
LOCKPower supply position is in LOCK posi-
tion
(Steering lock activated)Battery voltage
0 Battery volt-
age
(Battery voltage is detected when
activating the steering lock)
9OSteering lock feed
back signal— Steering lock: Lock 0
LOCK Steering lock: Unlock 8
10 B Ground — — 0
11 YIPDM E/R current sig-
nalSTART At starter motor cranking 5
LOCK Any condition other than above 2
12 R Feed back signalLOCKSleep condition (30 seconds or more
after all doors are closed under the con-
dition that the power supply position is in
the LOCK position)1
—Wake-up condition (any condition other
than above)0
13 R Starter relaySTART At starter motor cranking Battery voltage
— Any condition other than above 4
14 SB Power source (fuse) — — Battery voltage
15 LPower source (fusible
link)— — Battery voltage
17 GPower source (fusible
link)— — Battery voltage

INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
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Revision: 2006 January2006 M35/M45
CAUTION:
When CAN COMM 1 [U1000] and CAN COMM 2 [U1010] are displayed, give priority to performing trouble diagnosis.
DATA MONITOR
ENG START SW
[B2556]Condition that push-button ignition switch is pushed is
detected continuously for 100 seconds or moreCheck push-button igni-
tion switchBL-168
VEHICLE SPEED
[B2557]Some differences occur on one or more vehicle speed
inputs of Intelligent Key unitCheck vehicle speed sig-
nalBL-169
SHIFT POSITION
[B2558]
There is a difference between the shift position input
via CAN communication and the P position input by
detent switch
Vehicle speed (5 km/h or more) is detected continu-
ously for 10 seconds or more even if the shift posi-
tion is detected in P position when the power supply
position is in ON positionCheck shift position inputBL-172
PDU
[B2559]Internal malfunction is detected in PDU Replace PDUBL-174
START POW SUP CIRC
[B2560]Though the engine start operation is not performed,
starter relay in IPDM E/R is ONCheck starter power sup-
plyBL-174
LOW VOLTAGE
[B2562]Battery power supply input to Intelligent Key unit (8.8V
or less) is detected continuously for 1.5 seconds or
moreCheck battery low volt-
ageBL-177
HI VOLTAGE
[B2563]Battery power supply input to Intelligent Key unit (18V
or more) is detected continuously for 90 seconds or
moreCheck for battery high
voltageBL-178
NATS MALFUNCTION
[B2590]Malfunction is detected in immobilizer systemCheck (IVIS) NATS trou-
ble diagnosis procedureBL-268
Suspect Systems
[DTC]Diagnostic item is detected when... Repair work Reference page
Monitor item Content
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.
ON POS Indicates [ON/OFF] condition of ignition switch in ON position.
ACC POS Indicates [ON/OFF] condition of ignition switch in ACC position.
DOOR STAT SW Indicates [ON/OFF] condition of door unlock sensor.
STOP LAMP SW Indicates [ON/OFF] condition of stop lamp switch.
P RANGE SW Indicates [ON/OFF] condition of park position switch.
TR CANCEL SW* Indicates [ON/OFF] condition of trunk cancel 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.
KEYLESS PANIC* Indicates [ON/OFF] condition of panic alarm signal from Intelligent Key remote controller button.
DOOR SW DR*Indicates [OPEN/CLOSE] condition of front door switch driver side from BCM via CAN communica-
tion line.
DOOR SW AS*Indicates [OPEN/CLOSE] condition of front door switch passenger side from BCM via CAN commu-
nication line.
DOOR SW RR* Indicates [OPEN/CLOSE] condition of rear door switch LH from BCM via CAN communication line.
DOOR SW RL* Indicates [OPEN/CLOSE] condition of rear door switch RH from BCM via CAN communication line.
DOOR BK SW* Indicates [OPEN/CLOSE] condition of back door switch from BCM via CAN communication line.

BL-172
INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
Revision: 2006 January2006 M35/M45
DTC B2558 SHIFT POSITIONNIS001YV
DIAGNOSIS DESCRIPTION
B2558 shift position input system monitors the A/T selector lever position. If there is the difference between
the input from A/T device, the input from A/T assembly, and CAN communication input from A/T control unit, it
judges that it is the malfunction and displays the DTC (Diagnostic Trouble Code)
TERMINALS AND REFERENCE VALUE FOR INTELLIGENT KEY UNIT
SELF-DIAGNOSTIC LOGIC
DIAGNOSTIC PROCEDURE
1. CHECK A/T DEVICE SIGNAL
1. Turn ignition switch ON.
2. Check voltage between Intelligent Key unit connector and ground.
OK or NG
OK >> GO TO 4.
NG >> GO TO 2.
Te r m i -
nal
No.Wire
colorItemCondition
Voltage (V)
(Approx.) Push-
button
ignition
switch
positionOperation or conditions
27 VA/T device (Detention
switch)LOCK A/T selector lever is in P position 0
ONA/T selector lever is in any position
other than PBattery voltage
28 SB Starter relayON A/T selector lever is in N or P position Battery voltage
—Power supply position is in LOCK
position or A/T selector lever is in any
position other than N or P position0
58 OA/T device (Detention
switch)LOCKAt sleep (30 seconds or more after all
doors are closed under the condition
that the power supply position is in the
LOCK position)0
— At wake-up (Open driver door) Battery voltage
DTC Self-diagnosis name DTC detecting condition Possible causes
B2558 SHIFT POSITIONThere is an input difference of A/T selector
lever position input to Intelligent Key unit for 2
seconds or more
Harness and connector
(Open in the circuit between the units)
A/T device (detent switch)
A/T assembly (control valve assembly)
Terminals
A/T con-
trol device
positionVoltage (V)
(Approx.) (+)
(–)
Intelligent Key unit
connectorTerminal
M32 27 GroundP0
Other than
aboveBattery voltage
PIIB6244E