Infiniti G35 (V35) Sedan. Manual - part 1163

DIAGNOSIS AND REPAIR WORKFLOW

SEC-7

< BASIC INSPECTION >

[INTELLIGENT KEY SYSTEM]

C

D

E

F

G

H

I

J

L

M

A

B

SEC

N

O

P

• Infiniti vehicle immobilizer system-NATS: 

SEC-203, "Symptom Table"

.

>> GO TO 8.

8.

DETECT MALFUNCTIONING PART BY DIAGNOSTIC PROCEDURE

Inspect according to Diagnostic Procedure of the system.
NOTE:
The Diagnostic Procedure described based on open circuit inspection. A short circuit inspection is also
required for the circuit check in the Diagnostic Procedure.
Is malfunctioning part detected?

Yes

>> GO TO 9.

No

>> Check voltage of related BCM terminals using CONSULT-III.

9.

REPAIR OR REPLACE THE MALFUNCTIONING PART

1.

Repair or replace the malfunctioning part.

2.

Reconnect parts or connectors disconnected during Diagnostic Procedure again after repair or replace-
ment.

3.

Check DTC. If DTC is displayed, erase it.

>> GO TO 10.

10.

FINAL CHECK

When DTC was detected in step 2, perform DTC Confirmation Procedure or Component Function Check
again, and then check that the malfunction have been fully repaired.
When symptom was described from the customer, refer to confirmed symptom in step 3 or 4, and check that
the symptom is not detected.
OK or NG

NG (DTC is detected)>>GO TO 8.
NG (Symptom remains)>>GO TO 6.
OK

>> INSPECTION END

SEC-8

< BASIC INSPECTION >

[INTELLIGENT KEY SYSTEM]

INSPECTION AND ADJUSTMENT

INSPECTION AND ADJUSTMENT

ECM RE-COMMUNICATING FUNCTION

ECM RE-COMMUNICATING FUNCTION : Description

INFOID:0000000000961314

Performing following procedure can automatically perform re-communication of ECM and BCM, 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-III is not necessary)
NOTE:
• When registering new Key IDs or replacing the ECM that is not brand new, refer to CONSULT-III Oper-

ation 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.

ECM RE-COMMUNICATING FUNCTION : Special Repair Requirement

INFOID:0000000000961315

1.

PERFORM ECM RE-COMMUNICATING FUNCTION

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”.

5.

Start engine.

Can engine be started?

YES

>> Procedure is completed.

NO

>> Initialize control unit.Refer to CONSULT-III Operation Manual NATS-IVIS/NVIS.

INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION

SEC-9

< FUNCTION DIAGNOSIS >

[INTELLIGENT KEY SYSTEM]

C

D

E

F

G

H

I

J

L

M

A

B

SEC

N

O

P

FUNCTION DIAGNOSIS

INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION

System Diagram

INFOID:0000000000961316

System Description

INFOID:0000000000961317

INPUT/OUTPUT SIGNAL CHART

SYSTEM DESCRIPTION 

• 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 pressing
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.
NOTE:
The driver should carry the Intelligent Key at all times.

• Intelligent Key has 2 IDs [for Intelligent Key and for IVIS (NATS)]. It can perform the door lock/unlock opera-

tion and the push-button ignition switch operation when the registered Intelligent Key is carried.

• When the Intelligent Key battery is discharged, it can be used as emergency back-up by inserting the Intelli-

gent Key to the key slot. At that time, perform the IVIS (NATS) ID verification. If it is used when the Intelligent
Key is carried, 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 in the Intel-
ligent Key. 

JMKIA0057GB

Switch

Input signal to BCM

BCM function

Actuator

Push-button ignition switch

Push switch

Engine stat function

• Steering lock relay
• Steering lock unit
• Starter relay (IPDM E/R)
• Starter control relay (IPDM E/

R)

• Starter motor
• KEY warning lamp

AT device (A/T models)

P range

PNP switch (A/T models)

N, P range

Clutch interlock switch (M/T mod-
els)

Clutch ON/OFF

Stop lamp switch

Brake ON/OFF

Each inside key antenna

Request signal

Remote keyless entry receiver

Key ID

Each door switch

Door open/close

ECM

Engine status signal

SEC-10

< FUNCTION DIAGNOSIS >

[INTELLIGENT KEY SYSTEM]

INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION

• Intelligent Key can be registered up to 4 keys (Including the standard Intelligent Key) on request from the

owner.
NOTE:
• Refer to 

DLK-18, "INTELLIGENT KEY : System Description"

 for any functions other than engine start func-

tion of Intelligent Key system.

PRECAUTIONS FOR INTELLIGENT KEY SYSTEM

• In the Intelligent Key system of model V36, the transponder [the chip for IVIS (NATS) ID verification]

is integrated into the Intelligent Key. (For the conventional models, it is integrated into the mechani-
cal key.) Therefore, the mechanical key cannot perform the ID verification, and thus it cannot start
the engine. Instead, the IVIS (NATS) ID verification can be performed by inserting the Intelligent Key
into the key slot, and then it can start the engine.

OPERATION WHEN INTELLIGENT KEY IS CARRIED

1.

When the push-button ignition switch is pressed, the BCM signals the inside key antenna and transmits
the request signal to the Intelligent Key.

2.

The Intelligent Key receives the request signal and transmits the Intelligent Key ID signal to the BCM via
the remote keyless entry receiver.

3.

The Intelligent Key receives the Intelligent Key ID signal and verifies it with the registered ID.

4.

BCM transmits the steering lock unlock signal to steering lock unit and IPDM E/R if the verification results
are OK.

5.

IPDM E/R turns the steering lock relay ON and supplies power to the steering lock unit.

6.

Release of the steering lock.

7.

BCM transmits the power supply stop signal to IPDM E/R when it confirms that the steering lock is in the
unlock condition.

8.

IPDM E/R turns the steering lock relay OFF and stops power supply to the steering lock unit.

9.

BCM turns ACC relay ON and transmits the ignition power supply ON signal to IPDM E/R.

10. IPDM E/R turns the ignition relay ON and starts the ignition power supply.

11. BCM confirms that the shift position is P or N. (A/T models)
12. BCM transmits the starter request signal via CAN communication to IPDM E/R and turns the starter relay

in IPDM E/R ON if BCM judges that the engine start condition is satisfied.

13. IPDM E/R turns the starter control relay ON when receiving the starter request signal.
14. Battery power is supplied through the starter relay and the starter control relay to operate the starter motor

and to start the cranking.

CAUTION:

If a malfunction is detected in the Intelligent Key system, the “KEY” warning lamp in the combina-
tion meter illuminates. At that time, the engine cannot be started.

15. When BCM received feedback signal from ECM acknowledging the engine has been initiated, the BCM

transmits a stop signal to IPDM E/R and stops the cranking by turning OFF the starter motor relay. (If the
engine initiating has failed, the cranking will stop automatically within 5 seconds.)

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 “PUSH-BUTTON IGNITION SWITCH OPERATION PROCEDURE”.

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 IVIS (NATS) 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 

SEC-17, "System Description"

.

BATTERY SAVER SYSTEM

When all the following conditions are met for 60 minutes, the battery saver system will cut off the power supply
to prevent battery discharge.