2007 INFINITI M35 keyless

INTELLIGENT KEY SYSTEM
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Revision: 2007 April2007 M35/M45
Check Ignition Switch PositionNIS001XY
1. CHECK IGNITION POWER SUPPLY
Check voltage between Intelligent Key unit connector and ground.
OK or NG
OK >> Ignition power supply is OK.
NG >> Check the following.

Repair or replace Intelligent Key unit power supply circuit.

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

Check 10A fuse [No. 12, located in the fuse block (J/B)]
Check Remote Keyless Entry ReceiverNIS001XZ
1. CHECK REMOTE KEYLESS ENTRY RECEIVER OUTPUT SIGNAL
1. Turn ignition switch OFF.
2. Check signal between remote keyless entry receiver connector and ground with oscilloscope.
OK or NG
OK >> Remote keyless entry receiver is OK.
NG >> GO TO 2.
Te r m i n a l s
Ignition switch position
(+)
(–) Intelligent
Key unit
connectorTerminal OFF ACC ON
M3230
Ground0 Battery voltage Battery voltage
31 0 0 Battery voltage
PIIB6357E
Terminals
Keyfob
conditionSignal
(Reference value) (+)
(–) Remote
keyless
entry
receiver
connectorTerminal
M89 2 GroundNo function
Any button
is pressed
PIIB6358E
OCC3879D
OCC3880D

BL-116
INTELLIGENT KEY SYSTEM
Revision: 2007 April2007 M35/M45
2. CHECK REMOTE KEYLESS ENTRY RECEIVER POWER SUPPLY
1. Disconnect remote keyless entry receiver connector.
2. Check signal between remote keyless entry receiver connector and ground with oscilloscope.
OK or NG
OK >> GO TO 4.
NG >> GO TO 3.
3. CHECK HARNESS CONTINUITY 1
1. Disconnect Intelligent Key unit connector.
2. Check continuity between Intelligent Key unit connector and remote keyless entry receiver connector.
3. 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 between Intelligent Key unit and remote keyless entry receiver.
4. CHECK REMOTE KEYLESS ENTRY RECEIVER GROUND CIRCUIT
Check continuity between remote keyless entry receiver connector and ground.
OK or NG
OK >> GO TO 6.
NG >> GO TO 5.
Terminals
Signal
(Reference value) (+)
(–) Remote keyless
entry receiver
connectorTerminal
M89 4 Ground
PIIB6359E
OCC3881D
AB
Continuity
Intelligent Key
unit connectorTe r m i n a lRemote keyless
entry receiver
connectorTerminal
M32 7 M89 4 Yes
A
GroundContinuity
Intelligent Key unit
connectorTerminal
M32 7 No
PIIB6360E
Remote keyless entry
receiver
connectorTerminal
GroundContinuity
M89 1 Yes
PIIB6361E

INTELLIGENT KEY SYSTEM
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Revision: 2007 April2007 M35/M45
5. CHECK HARNESS CONTINUITY 2
Check continuity between Intelligent Key unit connector and remote keyless entry receiver connector.
OK or NG
OK >> Check the condition of harness and connector.
NG >> Repair or replace harness between Intelligent Key unit
and remote keyless entry.
6. CHECK HARNESS CONTINUITY 3
1. Check continuity between Intelligent Key unit connector and remote keyless entry receiver connector.
2. Check continuity between Intelligent Key unit connector and
ground.
OK or NG
OK >> GO TO 7.
NG >> Repair or replace harness between Intelligent Key unit and remote keyless entry.
AB
Continuity
Intelligent Key
unit connectorTerminalRemote keyless
entry receiver
connectorTerminal
M32 6 M89 1 Yes
PIIB6362E
AB
Continuity
Intelligent Key
unit connectorTerminalRemote keyless
entry receiver
connectorTerminal
M32 5 M89 2 Yes
A
GroundContinuity
Intelligent Key unit
connectorTerminal
M32 5 No
PIIB6363E

BL-118
INTELLIGENT KEY SYSTEM
Revision: 2007 April2007 M35/M45
7. INTELLIGENT KEY UNIT OUTPUT SIGNAL
1. Connect Intelligent Key unit and remote keyless entry receiver connector.
2. Check voltage between Intelligent Key unit connector and ground.
OK or NG
OK >> Check the condition of harness and connector.
NG >> GO TO 8.
8. CHECK HARNESS CONTINUITY 4
1. Disconnect Intelligent Key unit and remote keyless entry receiver connector.
2. Check continuity between Intelligent Key unit connector and remote keyless entry receiver connector.
3. 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 between Intelligent Key unit and remote keyless entry receiver.
Terminals
ConditionVoltage (V)
(Approx.) (+)
(–) Intelligent
Key unit
connectorTe r -
minal
M32 4 GroundWhen Intelli-
gent Key is in
vehicle, press
push-button
ignition switch0
Other than
above
PIIB9008E
PIIB5657J
AB
Continuity
Intelligent Key
unit connectorTerminalRemote keyless entry
receiver connectorTerminal
M32 4 M89 3 Yes
A
GroundContinuity
Intelligent Key unit
connectorTerminal
M32 4 No
PIIB6365E

BL-126
INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
Revision: 2007 April2007 M35/M45
System DescriptionNIS001Y8

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 press-
ing 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 (Intelligent Key unit).
NOTE:
The driver should always carry the intelligent key at all times.

Intelligent Key has 2 IDs (for Intelligent Key and for immobilizer). It can perform the door lock/unlock oper-
ation and the push-button ignition switch operation when carrying the registered Intelligent Key.

When the Intelligent Key battery is discharged, it can be used as emergency by inserting the Intelligent
Key to the key slot. At that time, perform the immobilizer ID verification. If it is used when carrying the
Intelligent Key, perform the Intelligent Key ID verification.

If the ID is successfully verified, and when push-button ignition switch is pressed, steering lock will be
released and initiating 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 into
the Intelligent Key.

Intelligent Key can be registered up to 4 keys (Including the standard Intelligent Key) on request from the
owner.
NOTE:

Refer to BL-43, "INTELLIGENT KEY SYSTEM" for any functions other than engine start function of
Intelligent Key system.
10. Unified meter and A/C amp M64,
M6511. Combination meter M52 12. Security indicator
(Multifunction switch) M69
13. Steering lock unit M35
(Steering column)14. Remote keyless entry receiver
(View with instrument lower panel
RH removed) M89 15. Key slot M14
PIIB5896E

INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
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Revision: 2007 April2007 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

INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
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Revision: 2007 April2007 M35/M45
Terminals and Reference Value for Intelligent Key UnitNIS001YE
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
3 Y IPDM E/R status signal InputSTART Engine starting (During cranking) 5
LOCK Other than above 2
4 B/Y RSSI signalInput/
OutputLOCKCarry the Intelligent Key within
the inside key antenna detection
area, and then push the push-
button ignition switch.0
Other than above
5B/WRemote key less entry
receiver signalInput/
OutputLOCKCarry the Intelligent Key within
the inside key antenna detection
area, and then push the push-
button ignition switch.
(When receiving the signal from
Intelligent Key)
Other than above
(Signal receiving wait mode)
6BRemote key less entry
receiver ground—— — 0
7B/RRemote keyless entry
receiver power supplyOutput — —
8WPush-button ignition
switch LOCK indicatorOutputLOCKPush-button ignition switch is in
LOCK position0
—Push-button ignition switch is in
any position
(Except LOCK position)1.2
9LPush-button ignition
switch ACC indicatorOutputACCPush-button ignition switch is in
ACC position0
—Push-button ignition switch is in
any position
(Except ACC position)1.2
PIIB5657J
OCC3880D
OCC3879D
OCC3881D

BL-148
INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
Revision: 2007 April2007 M35/M45
Work FlowNIS001YJ
1. LISTEN TO CUSTOMER COMPLAINT OR REQUEST
Get symptoms or listen to customer complaints or request.
NOTE:
In case of request for Intelligent Key or IVIS (NATS) system repair, the key ID re-registration might be neces-
sary. Keep all the Intelligent Keys before work for the re-registration.
Key ID registration request>>Resister Intelligent Key by referring to Technical Bulletin.
Request for malfunction repair.>>GO TO 2.
2. CHECK DOOR LOCK AND REMOTE KEYLESS ENTRY FUNCTION
Check that Door Lock and remote control function of Intelligent Key operate normally.
Door Lock or remote keyless entry function is malfunctioning.>>Malfunction of Door Lock and remote control
function, Refer to BL-43, "
INTELLIGENT KEY SYSTEM" .
Door Lock and remote keyless entry function are normal.>>GO TO 3.
3. CONFIRMATION BEFORE DIAGNOSIS
Before performing diagnostic procedure, grasp the operating systems with referring to the items below.

“System operation with carrying Intelligent Key”. Refer to BL-127, "OPERATION WHEN INTELLIGENT
KEY IS CARRIED" .

“System operation by using Key slot”. Refer to BL-128, "OPERATION WHEN KEY SLOT IS USED" .
>> GO TO 4.
4. CONFIRM SELF DIAGNOSIS 1
Start CONSULT-II with Push-button ignition switch in lock position and confirm SELF DIAG RESULT “Intelli-
gent Key”. Refer to BL-150, "
CONSULT-II Inspection Procedure" .
No malfunction>>GO TO 5.
Malfunction exist>>Repair the items displayed in “SELF DIAG RESULTS”. Refer to BL-150, "
SELF-DIAG-
NOSTIC RESULTS" .
5. CONFIRM SELF DIAGNOSIS 2
Start CONSULT-II with Push-button ignition switch in lock position and confirm SELF DIAG RESULTS “NATS
BCM or S/ENT” and “NATS I-KEY”. Refer to BL-265, "
CONSULT-II INSPECTION PROCEDURE" .
NOTE:
NATS program card is necessary to display “SELF DIAG RESULTS”.
No malfunction>>GO TO 6.
Malfunction exist>>Repair the items displayed in “SELF DIAG RESULTS”. Refer to BL-268, "
“NATS BCM OR
S/ENT” SELF-DIAGNOSTIC RESULTS ITEM CHART" and BL-269, "“NATS I-KEY” SELF-DIAG-
NOSTIC RESULTS ITEM CHART" .