2007 INFINITI M35 keyless entry

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
BL-127
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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" .

INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
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Revision: 2007 April2007 M35/M45
DIAGNOSTIC PROCEDURE
1. CHECK POWER SUPPLY CIRCUIT
1. Start engine.
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 alternator. Refer to
Trouble Diagnosis Symptom Chart 1NIS001Z0
Power supply switching operation cannot be operated with all Intelligent Keys.
CAUTION:

Follow Trouble Diagnosis Flowchart referring to “Diagnosis Procedure”. Determine malfunction-
ing condition before performing this diagnosis.

Make sure that vehicle is under the condition shown in “Conditions of vehicle” before starting
diagnosis.

Check systems shown in the “Diagnosis/service procedure” column in this order.
CONDITIONS OF VEHICLE (OPERATING CONDITIONS)

Engine start function is ON when setting on CONSULT-II.

Use Intelligent Key with registered Intelligent Key ID.

One or more of Intelligent Keys with registered Intelligent Key ID is in the passenger room.
Terminals
Voltage (V)
(Approx.) (+)
(–)
Intelligent Key unit
connectorTerminal
M32 1
Ground Battery voltage
M3341
57
PIIB6252E
Diagnosis/service procedure Reference page
1. Check push button ignition switchBL-179
2. Check inside key antennaBL-181
3. Check remote keyless entry receiverBL-183
4. Replace Intelligent Key unit.BL-123

INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
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Revision: 2007 April2007 M35/M45
4. CHECK INDE KEY ANTENNA INPUT SIGNAL 2
1. Replace inside key antenna. (New antenna or other antenna)
2. Connect Intelligent Key unit and inside key antenna connector.
3. Check signal between Intelligent Key unit connector and ground with oscilloscope.
OK or NG
OK >> Replace malfunction inside key antenna.
NG >> Replace Intelligent Key unit.
Check Remote Keyless Entry ReceiverNIS001Z6
1. CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect remote keyless entry receiver connector.
3. Check voltage between Intelligent Key unit connector and ground.
OK or NG
OK >> GO TO 2.
NG >> Replace Intelligent Key unit.
Terminals
ConditionSignal
(Reference value.) (+)
(–)
Intelligent Key
unit connectorTe r -
minal
M33Instru-
ment
center47
GroundAny door
is open →
close Console 49
Rear seat 51
Trunk
room53
PIIB6350E
SIIA1910J
Terminals
ConditionVoltage (V)
(Approx.) (+)
(–) Intelli-
gent Key
unit con-
nectorTe r -
minal
M32 4 GroundCarry the Intelli-
gent Key within
the inside key
antenna detec-
tion area, and
then push the
push-button
ignition switch.0
Other than the
above.
PIIB6264E
PIIB5657J

BL-184
INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
Revision: 2007 April2007 M35/M45
2. CHECK HARNESS CONITNUITY
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 >> GO TO 3.
NG >> Repair or replace harness between Intelligent Key unit and remote keyless entry receiver.
3. CHECK REMOTE KEYLESS ENTRY RECEIVER
1. Replace remote keyless entry receiver.
2. Connect Intelligent Key unit and remote keyless entry receiver connector. Check function the Intelligent
Key is carried into the inside key antenna detection area and the ignition switch is turned to START.
OK or NG
OK >> Remote keyless entry receiver is malfunction.
NG >> Remote keyless entry receiver is OK. If its malfunction is the same malfunction that occurred
before performing the Remote Keyless Entry Receiver Circuit Inspection, it is not a malfunction in
the remote keyless entry receiver circuit.
Check Key Switch Built In Key SlotNIS001Z7
1. CHECK FUNCTION
When the driver door is opened while inserting the Intelligent Key into the key slot, make sure that key
reminder warning functions properly.
OK or NG
OK >> GO TO 5.
NG >> GO TO 2.
AB
Continuity
Intelligent Key
unit connectorTe r m i n a lRemote keyless
entry receiver
connectorTerminal
M32 4 M89 3 Yes
A
GroundContinuity
Intelligent Key unit connector Terminal
M32 4 No
PIIB6265E
Key inserted : Sound
Key removed : No sound