2007 INFINITI M35 steering

BL-160
INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
Revision: 2007 April2007 M35/M45
4. CHECK COMMUNICATION CIRCUIT 1
1. Turn ignition switch OFF.
2. Disconnect Intelligent Key unit and power distribution unit connector.
3. Check continuity between Intelligent Key unit connector and power distribution unit connector.
4. Check continuity between Intelligent Key unit connector and
ground.
OK or NG
OK >> Check the condition of harness and connector.
NG >> Repair or replace harness.
5. CHECK SIGNAL CIRCUIT
1. Connect steering lock unit and power distribution unit connector.
2. Check continuity between steering lock unit connector and ground.
OK or NG
OK >> Replace steering lock unit.
NG >> GO TO 6.
AB
Continuity
Intelligent Key
unit connectorTe r m i n a lPower distribution
unit connectorTerminal
M3346
M306
Ye s
71 7
A
GroundContinuity
Intelligent Key
unit connectorTerminal
M3346
No
71
PIIB6230E
Terminals
ConditionVoltage (V)
(Approx.) (+)
(–)
Steering lock
unit connectorTerminal
M353
GroundWhen turn igni-
tion switch to
START with
Intelligent Key
in the carBattery voltage
80
3
Ignition switch:
OFF0
8Battery voltage
PIIB6231E

INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
BL-161
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Revision: 2007 April2007 M35/M45
6. CHECK COMMUNICATION CIRCUIT 2
1. Turn ignition switch OFF.
2. Disconnect Intelligent Key unit and steering lock unit connector.
3. Check continuity between Intelligent Key unit connector and steering lock unit connector.
4. Check continuity 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 >> Repair or replace harness.
DTC B2552 INTELLIGENT KEYNIS001YP
DIAGNOSIS DESCRIPTION
B2552 Intelligent Key unit internal malfunction judges NG by self-detecting the Intelligent Key unit internal mal-
function.
If this DTC (Diagnostic Trouble Code) is displayed, replace the Intelligent Key unit and perform the specified
registration procedure. Refer to the Technical Bulletin.
DTC B2553 IGN POWER CIRCUITNIS001YQ
DIAGNOSIS DESCRIPTION
Though the power supply switching control to ON position by push-button ignition switch operation is per-
formed normally, if there is no ON power supply input to the Intelligent Key unit, B2553 ignition power supply
system judges it is the malfunction and displays the DTC (Diagnostic Trouble Code)
TERMINAL AND REFERENCE VALUE FOR INTELLIGENT KEY UNIT
CONSULT-II DATA MONITOR STANDARD VALUE
AB
Continuity
Intelligent Key
unit connectorTerminalSteering lock unit
connectorTerminal
M3369
M353
Ye s
70 8
A
GroundContinuity
Intelligent Key
unit connectorTerminal
M3369
No
70
PIIB8994E
Te r m i -
nal
No.Wire
colorItemCondition
Voltage (V)
(Approx.) Push-
button
ignition
switch
positionOperation or conditions
31 GRIgnition power supply
(ON)ONPower supply position is in ON or
START positionBattery voltage
Monitor item Measuring condition Reference value
ON POSPower supply position is in ON position ON
Power supply position is in any position other than ON OFF

IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-NATS)
BL-245
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Revision: 2007 April2007 M35/M45
NOTE:
If customer reports a “No start” condition, request ALL KEYS to be brought to an INFINITI dealer to
check for an IVIS (NATS) malfunction.
10. Unified meter and A / C amp M64, M65 11. Combination meter M52 12. Multifunction switch M69
(Security indicator)
13. Steering lock unit M35
(Steering column)
PIIB5895E

IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-NATS)
BL-247
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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

BL-260
IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-NATS)
Revision: 2007 April2007 M35/M45
Terminals and Reference Value for Intelligent Key UnitNIS0020I
Termi-
nal
No.Wire
colorItemSignal
Input/
OutputCondition
Voltage (V)
(Approx.) Push-
button
ignition
switch
positionOperation or conditions
1 SB Power source (fuse) Input — — Battery voltage
3YIPDM E/R current sig-
nalInputSTART At starter motor cranking 5
LOCK Any condition other than above 2
8WPush-button ignition
switch LOCK indicatorOutputLOCKPower supply position is in LOCK
position0
—Power supply position is in any
position other than LOCK1.2
9LPush-button ignition
switch ACC indicatorOutputACCPower supply position is in ACC
position0
—Power supply position is in any
position other than ACC1.2
10 VPush-button ignition
switch ON indicatorOutputONPower supply position is in ON
position0
—Power supply position is in any
position other than ON1.2
13 LG/B Key slot illumination Output LOCKDriver door is opened under the
condition that the Intelligent Key is
inserted into the key slot0 → Battery voltage → 0
Intelligent Key is removed from
key slot (when key slot illumination
is turned off)0
15 LGSteering lock unit
power sourceOutput LOCK — Battery voltage
16 P/BSteering lock unit sig-
nalInput/
OutputLOCK Steering lock: Lock Battery voltage
ACCSteering lock: Unlock
(Unlocked moment)0
19 BR/Y Key switch Input LOCKIntelligent Key is inserted into key
slotBattery voltage
Intelligent Key is removed from
key slot0
20 B Ground — — — 0
27 VA/T device (Detention
switch)InputLOCK A/T selector lever is in P position 0
ONA/T selector lever is in any posi-
tion other than PBattery voltage
28 SB Starter relay InputONA/T selector lever is in N or P posi-
tionBattery voltage
—Power supply 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 ACCPower supply position is in ACC
positionBattery voltage
31 GRIgnition power supply
(ON)Input ONPower supply position is in ON
positionBattery voltage

IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-NATS)
BL-261
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Revision: 2007 April2007 M35/M45
33 O PDU signal InputLOCK Steering lock: Lock 0
ACC Steering lock: Unlock 8
34 R PDU feed back signal Input LOCK At wake-up (Open driver door) 0
35 LG Vehicle speed signal Input ONAt speedometer operation (vehicle
speed approx. 40 km/h)
37 P CAN LInput/
Output—— —
38 L CAN HInput/
Output—— —
39 BR/WPush-button ignition
switchInput —Push-button ignition switch is
pressed0
Push-button ignition switch is
releasedBattery voltage
40 B Ground — — — 0
41 Y Power source (fuse) Input — — Battery voltage
42 P PDU wake up signal OutputLOCKAt sleep (30 seconds or more after
all doors are closed under the con-
dition that the power supply posi-
tion is in the LOCK position)Battery voltage
— At wake-up (Open driver door) 0
43 G Starter signal OutputON At starter motor cranking 0
— Other than above Battery voltage
46 V PDU signal Output— Steering lock: Lock Battery voltage
LOCK Steering lock: Unlocked moment 0
56 B Ground — — — 0
57 L Power source (fuse) Input — — Battery voltage
58 OA/T device (Detention
switch)InputLOCKAt sleep (30 seconds or more after
all doors are closed under the con-
dition that the power supply posi-
tion 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 Te r m i -
nal
No.Wire
colorItemSignal
Input/
OutputCondition
Voltage (V)
(Approx.) Push-
button
ignition
switch
positionOperation or conditions
PKIA1935E

BL-262
IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-NATS)
Revision: 2007 April2007 M35/M45
Terminals and Reference Value for Steering Lock UnitNIS0020J
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 LG PDU signal OutputLOCK Steering lock: Lock Battery voltage
ACC Steering lock: Unlocked moment 0
72 B Ground — — — 0 Termi-
nal
No.Wire
colorItemSignal
Input/
OutputCondition
Voltage (V)
(Approx.) Push-
button
ignition
switch
positionOperation or conditions
Termi-
nal
No.Wire
colorItemSignal
Input/
OutputCondition
Voltage (V)
(Approx.) Push-but-
ton ignition
switch posi-
tionOperation or conditions
1 GR PDU signalInput/
OutputLOCKPress push-button ignition
switch with Intelligent Key
inside vehicle0 → Battery voltage → 0
(Battery voltage is detected when
pressing the push-button ignition
switch)
3 O Condition signal-1 InputLOCK Steering lock: Lock 0
ACC
Steering lock: UnlockBattery voltage
ON Battery voltage
4P/BIntelligent Key unit
signalInputLOCK Steering lock: Lock Battery voltage
ACC
Steering lock: Unlock0
ON 0
5 B Ground — — — 0
6 B Ground — — — 0
7 LG Power source Input — — Battery voltage
8 L/Y Condition signal-2 InputLOCK Steering lock: Lock Battery voltage
ACC
Steering lock: Unlock0
ON 0

BL-264
IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-NATS)
Revision: 2007 April2007 M35/M45
Terminals and Reference Value for PDUNIS0020M
Te r -
minal
No.Wire
colorItemSignal
Input/
OutputCondition
Voltage (V)
(Approx.) Push-
button
ignition
switch
positionOperation or conditions
1 P Wake up signal InputLOCKSleep condition (30 seconds or
more after all doors are closed
under the condition that the power
supply position is in the LOCK posi-
tion)Battery voltage
—Wake-up condition (Open driver
door)0
2GStarter control sig-
nalInputON At starter motor cranking 0
— Any condition other than above Battery voltage
3GRSteering lock unit
power sourceOutputLOCKPush-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-1Input—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
position
(Steering lock activated)Battery voltage → 0 →
Battery voltage
(Battery voltage is detected
when activating the steer-
ing lock)
7LGSteering lock control
signal-2Input—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
position
(Steering lock activated)Battery voltage → 0 →
Battery voltage
(Battery voltage is detected
when activating the steer-
ing lock)
9OSteering lock feed
back signalInput—Power supply position is in ACC or
ON position0
LOCKPower supply position is in LOCK
position0 → 8 → 0
(0V is detected when acti-
vating the steering lock)
10 B Ground — — — 0
11 YIPDM E/R current
signalInputSTART At starter motor cranking 5
LOCK Any condition other than above 2
12 R Feed back signal InputLOCKSleep condition (30 seconds or
more after all doors are closed
under the condition that the power
supply position is in the LOCK posi-
tion)1
—Wake-up condition (any condition
other than above)0
13 R Starter relay OutputSTART At starter motor cranking Battery voltage
— Any condition other than above 4