ecm INFINITI M35 2007 Factory Workshop Manual

INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
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INTELLIGENT KEY SYSTEM/ENGINE START FUNCTIONPFP:285F1
Component Parts and Harness Connector LocationNIS001Y7
1. Fuse block (J/B) fuse layout 2. Fuse and fusible link box 3. BCM (View with instrument lower
panel RH removed) M1, M2
4. Intelligent key unit (View with dash
side finisher LH removed) M32, M335. PDU (View with combination meter
removed) M30, M316. IPDM E/R (Engine room) E4, E9
7. ECM (View with instrument lower
cover RH removed) M718. Push-button ignition switch M27 9. Stop lamp switch E124
PIIB5894E

INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
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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

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IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-NATS)
Revision: 2007 April2007 M35/M45
IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-NATS)PFP:28591
Component Parts and Harness Connector LocationNIS0020C
1. Fuse block (J/B) fuse layout 2. Fuse and fusible link box 3. BCM M1, M2, M3 (View with instru-
ment lower panel RH removed)
4. Intelligent key unit M32, M33 (View
with dash side finisher LH removed) 5. PDU M30, M31 (View with combina-
tion meter removed)6. IPDM E/R E4, E9
(Engine room)
7. ECM M71 (View with instrument
lower panel RH removed)8. Push-button ignition switch M27 9. Stop lamp switch E124
PIIB5894E

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IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-NATS)
Revision: 2007 April2007 M35/M45
System DescriptionNIS0020D
DESCRIPTION

The IVIS (NATS) is an anti-theft system by registering an Intelligent Key ID in to the vehicle and prevents
the engine being started by an unregistered Intelligent Key. It has a higher protection against auto thefts
that duplicates mechanical key.

It performs the ID verification when starting the engine in the same way as the Intelligent Key system. But,
it performs the IVIS (NATS) ID verification when inserting the Intelligent Key and performs the Intelligent
Key ID verification when carrying the Intelligent Key.

The Intelligent Key system of FUGA (Y50) is not the same as the conventional models. The mechanical
key integrated in the Intelligent Key cannot start the engine. When the Intelligent Key battery is dis-
charged, the IVIS (NATS) ID verification memorized to the transponder integrated with Intelligent Key is
performed by inserting the Intelligent Key into the key slot. If the verification results are OK, the engine
start operation can be performed by the push-button ignition switch operation.

Locate the security indicator and apply the anti-theft system equipment sticker, forewarn that the IVIS
(NATS) is onboard with the model.

The security indicator always blinks when the Intelligent Key is removed from the key slot and when the
power supply position is in LOCK position.

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

The specified registration is required when replacing ECM, BCM or Intelligent Key. The registrations pro-
cedure for IVIS (NATS) and registration procedure for Intelligent Key when installing the Intelligent Key
unit, refer to CONSULT-II Operation Manual NATS-IVIS/NVIS.

Possible symptom of IVIS (NATS) malfunction is “Engine cannot start”. In FUGA (Y50), the engine can be
started with the Intelligent Key system and IVIS (NATS). Identify the possible causes according to “Work
Flow”, Refer to BL-269, "
Work Flow" .

If ECM other than Genuine NISSAN is installed, the engine cannot be started. For ECM replacement pro-
cedure, refer to BL-248, "
ECM Re-Communicating Function" .
PRECAUTIONS FOR KEY REGISTRATION

The key registration is a procedure that erases the current IVIS (NATS) ID once, and then re register a
new ID operation. Therefore the registered Intelligent Key is necessary for this procedure. Before starting
the registration operation collect all registered Intelligent Key from the customer

When registering the Intelligent Key, 2 registration procedures [IVIS (NATS) ID registration and Intelligent
Key ID registration] should be performed. The IVIS (NATS) ID registration is the procedure that registers
the ID stored into the transponder (integrated into Intelligent Key) to the BCM. The Intelligent Key ID reg-
istration is the procedure that registers the ID to the Intelligent Key unit. Each registration procedure
should be done separated.

When performing the Intelligent Key system registration only, the engine cannot be started by inserting the
key into the key slot. When performing the IVIS (NATS) registration only, the engine cannot be started by
the operation when carrying the key. The registrations of both systems should be performed.
SECURITY INDICATOR

Warn the outside that the vehicle is the model with IVIS (NATS).

The security indicator always blinks when the Intelligent Key is removed from the key slot and when the
ignition switch is in LOCK position.
NOTE:
Because security indicator is highly efficient, the battery is barely affected.

IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-NATS)
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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).
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IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-NATS)
Revision: 2007 April2007 M35/M45

Unless each start condition is fulfilled, the engine will not response regardless of how many times the
push-button ignition switch is pushed. At that time, illumination repeats the position in the order of LOCK
→ ACC → ON → LOCK.
*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 within 1.5 seconds. (Emergency stop operation)
ECM Re-Communicating FunctionNIS0020F
Performing following procedure can automatically perform re-communication of ECM and BCM or Intelligent
Key unit, but only when the ECM has been replaced with a new one (*1).
*1: New one means a virgin ECM which has never been energized on-board.
(In this step, initialization procedure by CONSULT-II is not necessary)
NOTE:

When registering new Key IDs or replacing the ECM other than brand new, refer to CONSULT-II
Operation Manual NATS-IVIS/NVIS.

If multiple keys are attached to the key holder, separate them before work.

Distinguish keys with unregistered key ID from those with registered ID.
1. Install ECM.
2. Insert the registered Intelligent Key (*2), turn ignition switch to “ON”.
*2: To perform this step, use the key that has been used before performing ECM replacement.
3. Maintain ignition switch in “ON” position for at least 5 seconds.
4. Turn ignition switch to “OFF”.
Power supply positionEngine start/stop condition
Engine switch operation fre-
quency
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 start condition → LOCK
(Engine stop)— P position 1
Engine start condition → ACC
(Engine stop)— Any position other than P (*2) 1
Engine stall return operation
while driving— N position 1

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IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-NATS)
Revision: 2007 April2007 M35/M45
7. Select “NATS V.5.0”.
If “NATS V5.0” is not indicated, go to GI-39, "
CONSULT-II Data
Link Connector (DLC) Circuit" .
8. Perform each diagnostic test mode according to each service
procedure.
For further information, see the CONSULT-II Operation Manual
NATS-IVIS/NVIS.
CONSULT-II DIAGNOSTIC TEST MODE FUNCTION
NOTE:

When any initialization is performed, all ID previously registered will be erased and all NATS ignition keys
must be registered again.

The engine cannot be started with an unregistered key. In this case, the system will show “DIFFERENCE
OF KEY” or “LOCK MODE” as a self-diagnostic result on the CONSULT-II screen.
PIIB6275E
PIIB6276E
System Diagnosis mode DescriptionReference
page
NATS V5.0C/U INTIALIZATIONPerform registration again after repair, part replacement, and
additional key ID registration.
CAUTION:
“Control Unit Initialization” is activated only after per-
forming “Release steering lock”.Refer to the
Technical Bul-
letin.
SELF-DIAG RESULTS

Malfunctioning system stored in the ECM is displayed.

Printing the contents

Erasing the error recordBL-268
NATS BCM or S/ENTPIN READThe specified numbers of each control unit for acquisition of
password for control unit initialization are displayedRefer to the
Technical Bul-
letin.
STEERING LOCK
RELEASEIf the engine switch cannot be operated (the steering lock
cannot be released), release the steering lock forcibly and
make the engine switch operation possible.
CAUTION:
Always perform “Control Unit Initialization” and “Immo-
bilizer ID Registration” after performing “Release Steer-
ing Lock”.Refer to the
Technical Bul-
letin.
SELF-DIAG RESULTS

Malfunctioning system stored in the BCM is displayed.

Printing the contents

Erasing the error recordBL-268
NATS I-KEY SELF-DIAG RESULTS

Malfunctioning system stored in the Intelligent Key unit is
displayed.

Printing the contents

Erasing the error recordBL-269

IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-NATS)
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In rare case, “CHAIN OF ECM-IMMU” might be stored as a self-diagnostic result during key registration
procedure, even if the system is not malfunctioning.
HOW TO READ SELF-DIAGNOSTIC RESULTS
PIIB6280E

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Revision: 2007 April2007 M35/M45
“NATS V5.0” SELF-DIAGNOSTIC RESULTS ITEM CHART
“NATS BCM OR S/ENT” SELF-DIAGNOSTIC RESULTS ITEM CHART
Suspect Systems Description Possible malfunction Action to take/Reference page
NO DTC NO DTC — —
DON'T ERASE BEFORE
CHECKING ENG DIAGThere is the engine trouble
diagnosis information in ECM
(ECM trouble diagnosis is nec-
essary separately)Engine control system malfunc-
tionThere is the engine trouble
diagnosis information in ECM.
Check the trouble diagnostic
results of “ENGINE” before
that.
LOCK MODE
[P1610]The immobilizer switches to the
mode that prevents the engine
from being started. If the ID ver-
ification between BCM and
ECM is NG, the ID verification
malfunction between remote
control starter and BCM may be
detected 5 times or more.—When “LOCK MODE” is dis-
played, check for any other dis-
played malfunction, and then
erase the self-diagnostic results
after replacement.
ID DISCORD, IMM-ECM
[P1611]The ID verification results
between BCM and ECM are
NG. The registration is neces-
sary.Registration of ECM is not com-
pletedBL-277
ECM malfunction Replace ECM.
CHAIN OF ECM-IMMU
[P1612]Inactive communication
between ECM and BCMOpen circuit in battery power
supply line of BCM
BL-275
Open circuit in ignition power
supply line of BCM
Open circuit in ground of BCM
Short circuit in communication
line between BCM and ECM to
power supply line
Open circuit in communication
line between BCM and ECM
Short circuit in communication
line between BCM and ECM to
ground
ECM malfunction
BCM malfunction
CHAIN OF IMMU-KEY
[P1614]BCM malfunction BCM malfunctionBCS-15
Suspect Systems Description Possible malfunction Action to take/Reference page
NO DTC NO DTC — —
ID DISCORD BCM-ECM
[B2192]The ID verification results
between BCM and ECM are
NG. The registration is neces-
sary.Registration of ECM is not com-
pletedPerform “Control Unit Initializa-
tion”, and then perform the ID
registration. Refer to the Tech-
nical Bulletin.
ECM malfunction Replace ECM.
CHAIN OF BCM-ECM
[B2193]Inactive communication
between ECM and BCMShort circuit in communication
line between BCM and ECM to
power supply lineMalfunction have occurred in
CAN communication
Check “Self-diagnostic Results”
of “Intelligent Key” using CON-
SULT-II. Refer to BL-150,
"SELF-DIAGNOSTIC
RESULTS" . Open circuit in communication
line between BCM and ECM
Short circuit in communication
line between BCM and ECM to
ground
ECM malfunction Replace ECM.

IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-NATS)
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“NATS I-KEY” SELF-DIAGNOSTIC RESULTS ITEM CHART
Work FlowNIS0020O
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>>Register Intelligent Key by referring to CONSULT-II operation manual IVIS/
NVIS NATS.
Request for malfunction repair.>>GO TO 2.
2. CHECK DOOR LOCK AND REMOTE CONTROL FUNCTION
Check that Door Lock and remote control function of Intelligent Key operate normally.
Door Lock or remote control function is malfunctioning.>>Malfunction of Door Lock function, Refer toBL-77,
"WORK FLOW" .
Door Lock and remote control function are normal.>>GO TO 3.
DISCORD BCM-I-KEY
[B2194]The ID verification results
between BCM and Intelligent
Key unit are NG.Short circuit in communication
line between BCM and Intelli-
gent Key unit to power supply
lineMalfunction have occurred in
CAN communication
Check “Self-diagnostic Results”
of “Intelligent Key” using CON-
SULT-II. Refer to BL-150,
"SELF-DIAGNOSTIC
RESULTS" . Short circuit in communication
line between BCM and ECM to
ground
Intelligent Key unit malfunctionBL-123
ANTI-SCANNING
[B2195]A remote control starter that is
not Genuine NISSAN is
installedIf a remote control starter that is
not Genuine NISSAN is
installed, the anti-theft system
is activated and the engine may
not be started. In this case,
remove the parts after the cus-
tomer understands the situa-
tion.— Suspect Systems Description Possible malfunction Action to take/Reference page
Suspect Systems Description Possible malfunction Action to take/Reference page
NO DTC NO DTC — —
DISCORD BCM-I-KEY
[B2590]The ID verification results
between Intelligent Key unit
and BCM are NG.Short circuit in communication
line between BCM and Intelli-
gent Key unit to power supply
lineMalfunction have occurred in
CAN communication
Check “Self-diagnostic Results”
of “Intelligent Key” using CON-
SULT-II. Refer to BL-150,
"SELF-DIAGNOSTIC
RESULTS" . Short circuit in communication
line between BCM and ECM to
ground
BCM malfunctionBCS-15