2007 INFINITI M35 brake

BL-128
INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
Revision: 2007 April2007 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-128, "
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-244, "
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→ON→LOCK.
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

INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
BL-129
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Revision: 2007 April2007 M35/M45
*1: When the A/T selector lever position is N position, the engine start condition is different according to the vehicle speed.

At vehicle speed of 5 km/h or less, the engine can start only when the brake pedal is depressed.

At vehicle speed of 5 km/h 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 A/T selector lever position is in any position other than P position and when the vehicle speed is 5 km/h 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 the incorrect operation.)

Press the push-button ignition switch 3 times or more within 1.5 seconds. (Emergency stop operation)
CAN Communication System DescriptionNIS001YA
CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tronic control units are equipped onto a vehicle, and each control unit shares information and links with other
control units during operation (not independent). In CAN communication, control units are connected with 2
communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring.
Each control unit transmits/receives data but selectively reads required data only.
CAN Communication UnitNIS001YB
Refer to LAN-50, "CAN System Specification Chart"
Engine is running →
ACC
(Engine stop)— Any position other than P (*2) 1
Engine stall return oper-
ation while driving— N position 1 Power supply positionEngine start/stop condition
Push-button ignition switch
operation frequency
Brake pedal A/T selector lever position

BL-142
INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
Revision: 2007 April2007 M35/M45
10 VPush-button ignition
switch ON indicatorOutputONPush-button ignition switch is in
ON position0
—Push-button ignition switch is in
any position
(Except ON position)1.2
13 LG/B Key slot illumination Output 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 sourceOutput LOCK — Battery voltage
16 P/BSteering lock unit sig-
nalInput/
OutputLOCK Steering lock: Lock Battery voltage
ACC
Steering lock: Unlock
(Unlocked moment)0
NO 0
19 BR/Y Key switch signal Input LOCKInsert Intelligent Key into key
slot.0
Remove Intelligent Key from key
slotBattery voltage
20 B Ground — — — 0
27 VA/T device (Detention
switch)InputLOCK A/T selector lever is in P position 0
ON Other than above Battery voltage
28 SB Starter relay InputONA/T selector lever is in N or P
positionBattery 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 Input —Brake pedal depressed Battery voltage
Brake pedal released 0
30 L/WIgnition power supply
(ACC)Input ACCIgnition switch position is in ACC
or ON positionBattery voltage
31 GRIgnition power supply
(ON)Input ONIgnition switch position is in ON
or START positionBattery voltage
33 O PDU signal InputLOCK Steering lock: Lock 0
ACC Steering lock: Unlock 8
34 R PDU feed back signal InputLOCKSleep condition (30 seconds or
more after all doors are closed
under the condition that the igni-
tion switch position is in the
LOCK position)1
—Wake-up condition (any condition
other than above)0 Te r m i -
nal
No.Wire
colorItemSignal
Input/
OutputCondition
Voltage (V)
(Approx.) Push-
button
ignition
switch
positionOperation or conditions

BL-144
INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
Revision: 2007 April2007 M35/M45
51 F/LInside key antenna (+)
signal
(Rear seat)Input/
Output
LOCKAny door open → closed
(Door switch: ON → OFF)
52 R/WInside key antenna (–)
signal
(Rear seat)Input/
Output
53 G/WInside key antenna (+)
signal
(Trunk room)Input/
Output
LOCKAny door open → closed
(Door switch: ON → OFF)
54 LGInside key antenna (–)
signal
(Trunk room)Input/
Output
56 B Ground — — — 0
57 L Power source (fuse) Input — — Battery voltage
58 OA/T device (Detention
switch)Output LOCKAt sleep (30 seconds or more
after all doors are closed under
the condition that the ignition
switch position is in the LOCK
position)0
At wake-up (Open driver door) Battery voltage
63 P Stop lamp switch Input —Brake pedal depressed Battery voltage
Brake pedal released Battery voltage
64 L/RPush-button ignition
switch illuminationOutput —Push-button ignition switch illumi-
nation is turned on2.6
Push-button ignition switch illumi-
nation is turned off
(15 seconds or more after the
driver door is closed)0
69 OSteering lock unit con-
dition signal-1InputLOCK Steering lock: Lock 0
ACC
Steering lock: UnlockBattery voltage
ON Battery voltage
70 L/YSteering lock unit con-
dition signal-2InputLOCK Steering lock: Lock Battery voltage
ACC
Steering lock: Unlock0
ON 0
71 LGSteering lock control
signal-2OutputLOCKPush-button ignition switch is
pressed under the condition that
Intelligent Key is in the vehicle or
Intelligent Key is insertedBattery voltage
ACCIgnition switch position is in
LOCK position (Steering lock
activated)Battery voltage → 0 → Battery
voltage
(Battery voltage is detected
when activating the steering
lock)
72 B Ground — — — 0 Te r m i -
nal
No.Wire
colorItemSignal
Input/
OutputCondition
Voltage (V)
(Approx.) Push-
button
ignition
switch
positionOperation or conditions
SIIA1910J
SIIA1910J

INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
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6. CHECK INTELLIGENT KEY FUNCTION
Operate Push-button ignition switch with carrying Intelligent Key to check the power source position can be
turned with all of the Intelligent Keys.
CAUTION:
Operate Push-button ignition switch without depressing the brake pedal.
Can be operated with all of the Intelligent Keys>>GO TO 7.
Can not be operated with particular Intelligent Key>>Check the malfunctioning Intelligent Key. Refer to BL-
124, "INTELLIGENT KEY BATTERY INSPECTION" .
Can not be operated with any of the Intelligent Keys>>Perform Diagnostic Procedure. Refer to BL-177,
"Trouble Diagnosis Symptom Chart 1" .
7. CHECK TURNING TIMING OF POWER SOURCE POSITION 1
Check the power source turning delay time after Push-button ignition switch is pushed. (Approx. 3 sec)
CAUTION:
Operate Push-button ignition switch without depressing the brake pedal.
No delay time exists>>GO TO 8.
Delay time exists>>Perform Diagnostic Procedure. Refer to BL-178, "
Trouble Diagnosis Symptom Chart 2" .
8. CHECK TURNING TIMING OF POWER SOURCE POSITION 2
Check all the Intelligent Keys for power source turning delay time after Push-button ignition switch is pushed
with Intelligent Key inserted into key slot. (Approx. 3 sec)
CAUTION:
Operate Push-button ignition switch without depressing the brake pedal.
No delay time exists>>GO TO 9.
Delay time exists when operated with particular Intelligent Key.>>Perform “C/U INITIALIZATION” referring to
CONSULT-II operation manual IVIS/NVIS NATS. In case that delay time still exists after the initial-
ization, replace the Intelligent Key.
Delay time exists when operated with any of the Intelligent Keys.>>Perform Diagnostic Procedure. Refer to
BL-178, "
Trouble Diagnosis Symptom Chart 3" .
9. CHECK ENGINE START FUNCTION
Check that engine can be started with Intelligent Key carried and inserted into the key slot respectively.
Engine can be started.>>GO TO 10.
Engine cannot be started.>>Inspect Trouble Diagnosis Flow Chart for IVIS (NATS). Refer to BL-272, "
Trou-
ble Diagnoses Flow Chart for IVIS (NATS)" .
10. CHECK SECURITY INDICATOR FUNCTION
Check Security Indicator for lighting up under the two conditions below.

Security Indicator lights off when Push-button ignition switch is pushed with Intelligent Key inserted into or
pulled out of the key slot.

Security Indicator blinks when Intelligent Key is pulled out and Push-button ignition switch is in lock posi-
tion.
Lighting up condition is normal.>>Inspection END.
Lighting up condition is malfunctioning.>>Perform Security Indicator Inspection. Refer to BL-274, "
Check
Security Indicator Harness" .

BL-154
INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
Revision: 2007 April2007 M35/M45
OUTSIDE BUZZERThis test is able to check Intelligent Key warning buzzer operation.
Intelligent Key warning buzzer sounds when “ON” on CONSULT-II screen is touched.
INSIDE BUZZERThis test is able to check warning chime into combination meter operation.

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

Key warning chime sounds when “KEY WARN” on CONSULT-II screen is touched.

P position warning chime sounds when “P RNG WARN” on CONSULT-II screen is touched.

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

“KEY” Warning lamp illuminates when “KEY IND ON” on CONSULT-II screen is touched.

“KEY” Warning lamp flashes when “KEY IND FSH” on CONSULT-II screen is touched.
LCDThis test is able to check meter display information

Engine start information displays when “BRAKE/P” on CONSULT-II screen is touched.

Engine start information displays when “BRAKE/P/ON” on CONSULT-II screen is touched.

Key ID warning displays when “KEY ID NG” on CONSULT-II screen is touched.

Steering lock information displays when “STLCK RELES” on CONSULT-II screen is touched.

P position warning displays when “P RNG IND” on CONSULT-II screen is touched.

Intelligent Key insert information displays when “INSERT KEY” on CONSULT-II screen is
touched.

Intelligent Key low battery warning displays when “KEY BAT LOW” on CONSULT-II screen is
touched.

Take away from window warning displays when “TK AWAY WDW” on CONSULT-II screen is
touched.

Take away warning display when “TAKE AWAY” on CONSULT-II screen is touched.

OFF position warning display when “IGN OFF WARN” on CONSULT-II screen is touched.
P RANGEThis test is able to check A/T device power supply
A/T device power is supplied when “ON” on CONSULT-II screen is touched.
ENGINE SW ILLUMIThis test is able to check push-ignition switch illumination operation.
Push-ignition switch illumination illuminates when “ON” on CONSULT-II screen is touched.
LOCK INDCATORThis test is able to check LOCK indicator in push-ignition switch operation.
LOCK indicator in push-ignition switch illuminates when “ON” on CONSULT-II screen is touched.
ACC INDCATORThis test is able to check ACC indicator in push-ignition switch operation.
LOCK indicator in push-ignition switch illuminates when “ON” on CONSULT-II screen is touched.
IGNITION ON INDThis test is able to check INGITION ON indicator in push-ignition switch operation.
LOCK indicator in push-ignition switch illuminates when “ON” on CONSULT-II screen is touched.
KEY SLOT ILLUMIThis test is able to check key slot illumination operation.
Key slot illumination flash when “ON” on CONSULT-II screen is touched. Test item Description

INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
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Revision: 2007 April2007 M35/M45
3. CHECK POWER SUPPLY CIRCUIT 2
1. Connect Intelligent Key unit and power distribution unit connector.
2. Check voltage between Intelligent Key unit connector and ground.
OK or NG
OK >> Check the condition of harness and connector. If it is
OK, check the self-diagnosis results using CONSULT-II
again.
NG >> Check the following.

10A fuse [No.6, located in the fuse block (J/B)]

Harness for open or short between fuse and Intelligent Key unit.
DTC B2555 STOP LAMP CIRCUITNIS001YS
DIAGNOSIS DESCRIPTION
B2555 stop lamp system monitors the open circuit before the stop lamp switch (models without ICC system),
which detects the brake pedal operation input to the Intelligent Key unit, or ICC brake relay (models with ICC
system). If it detects the open circuit, it judges that it is the malfunction and displays the DTC (Diagnostic Trou-
ble Code)
TERMINALS AND REFERENCE VALUE FOR INTELLIGENT KEY UNIT INPUT
CONSULT-II DATA MONITOR STANDARD VALUE
SELF-DIAGNOSTIC LOGIC
Terminals
Ignition
switch
conditionVoltage (V)
(Approx.) (+)
(–)
Intelligent Key unit
connectorTe r m i n a l
M32 30 GroundACC Battery voltage
OFF 0
PIIB6237E
Te r m i -
nal
No.Wire
colorItemCondition
Voltage (V)
(Approx.) Push-
button
ignition
switch
positionOperation or conditions
63 P Stop lamp switch —Brake pedal depressed Battery voltage
Brake pedal released Battery voltage
29 V/R Stop lamp switch —Brake pedal depressed Battery voltage
Brake pedal released 0
Monitor item Measuring condition Reference value
STOP LAMPBrake pedal is depressed ON
Brake pedal is released OFF
DTC Self-diagnosis name DTC detecting condition Possible causes
B2555 STOP LAMP CIRCUIT5V or less is detected at both the stop lamp switch signal
input circuit that is input to Intelligent Key unit and the
monitor input before stop lamp switch

10A fuse

Harness and connector
(Open in the circuit
between the units)

IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-NATS)
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Revision: 2007 April2007 M35/M45
Operation DescriptionNIS0020E
SYSTEM DIAGRAM
OPERATION WHEN INSERTING TO KEY SLOT
1. When inserting the Intelligent Key (with transponder) into the key slot, the key switch in the key slot turns
ON, and then it is detected that the Intelligent Key is inserted.
2. When pressing the push-button ignition switch at that time, BCM starts the IVIS (NATS) antenna amplifier
integrated with the key slot and starts the IVIS (NATS) ID communication with the transponder integrated
with the Intelligent Key.
3. BCM sends the IVIS (NATS) ID verification result to ECM via CAN communication and performs the ID
verification.
4. If the IVIS (NATS) ID verification result is OK, BCM sends the key ID verification OK signal to Intelligent
Key unit via CAN communication line.
5. The Intelligent Key unit sends the steering unlock signal to the steering lock unit when receiving the sig-
nal. Then, it sends each power supply request signal to PDU (Power Distribution Unit) after unlocking the
steering lock.
6. 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.
7. The steering lock unit unlocks the latch when receiving the signal. PDU starts the power distribution
according to the power supply position when receiving the signal.
NOTE:
If it is not in the engine start condition*, the starter motor relay is turned OFF. Therefore, the engine cannot be
started and the power distributions of ACC, ON, and LOCK are performed only according to the push-button
ignition switch operation.
*: For the engine start condition, refer to BL-247, "
PUSH-BUTTON IGNITION SWITCH OPERATION PROCE-
DURE" .
OPERATION WHEN INTELLIGENT KEY IS CARRIED
By carrying the Intelligent Key, the engine start/stop operation can be performed only when pushing the push-
button ignition switch.
For the details of the function, refer to BL-125, "
INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION" .
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 carried and when it is inserted to the key slot, the following operation is the
same.

When starting the engine, the Intelligent Key unit monitors the engine start conditions (brake pedal opera-
tion, A/T selector lever position, vehicle speed, and steering lock condition).
PIIB6277E