Nissan Pathfinder (2009 year). Manual - part 573

SEC-6

< BASIC INSPECTION >

[WITH INTELLIGENT KEY SYSTEM]

DIAGNOSIS AND REPAIR WORKFLOW

GET INFORMATION FOR SYMPTOM

Get the detailed information from the customer about the symptom (the condition and the environment when
the incident/malfunction occurred).

>> GO TO 2

CHECK DTC

Check DTC for Intelligent Key unit and BCM.

Perform the following procedure if DTC is displayed.

Erase DTC.

Study the relationship between the cause detected by DTC and the symptom described by the customer.

Check related service bulletins for information.

Is any symptom described and any DTC detected?

Symptom is described, DTC is displayed>>GO TO 3
Symptom is described, DTC is not displayed>>GO TO 4
Symptom is not described, DTC is displayed>>GO TO 5

CONFIRM THE SYMPTOM

Confirm the symptom described by the customer.
Connect CONSULT-III to the vehicle in “DATA MONITOR” mode and check real-time diagnosis results.
Verify relation between the symptom and the condition when the symptom is detected.

>> GO TO 5

CONFIRM THE SYMPTOM

Confirm the symptom described by the customer.
Connect CONSULT-III to the vehicle in “DATA MONITOR ” mode and check real-time diagnosis results.
Verify relation between the symptom and the condition when the symptom is detected.

>> GO TO 6

PERFORM DTC CONFIRMATION PROCEDURE

Perform DTC Confirmation Procedure for the displayed DTC, and then check that DTC is detected again.
If two or more DTCs are detected, refer to

SEC-98, "DTC Inspection Priority Chart"

(Intelligent Key unit),

SEC-78, "DTC Inspection Priority Chart"

(BCM) and determine trouble diagnosis order.

Is DTC detected?

YES

>> GO TO 8

>> Refer to

GI-49, "Intermittent Incident"

PERFORM BASIC INSPECTION

Perform Basic Inspection. Refer to

SEC-115, "Basic Inspection"

>> GO TO 7

DETECT MALFUNCTIONING SYSTEM BY SYMPTOM TABLE

Detect malfunctioning system according to Symptom Table based on the confirmed symptom in step 4.

>> GO TO 8

DETECT MALFUNCTIONING PART BY DIAGNOSTIC PROCEDURE

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

>> GO TO 9

2009 Pathfinder

DIAGNOSIS AND REPAIR WORKFLOW

SEC-7

< BASIC INSPECTION >

[WITH INTELLIGENT KEY SYSTEM]

SEC

REPAIR OR REPLACE THE MALFUNCTIONING PART

Repair or replace the malfunctioning part.

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

Check DTC. If DTC is displayed, erase it.

>> GO TO 10

10.

FINAL CHECK

When DTC was detected in step 9, perform DTC Confirmation Procedure or Component Function Check
again, and then check that the malfunctions have been fully repaired.
When symptom was described by the customer, refer to the confirmed symptom in step 3 or 4, and check that
the symptom is not detected.

Does the symptom reappear?

YES (DTC is detected)>>GO TO 8
YES (Symptom remains)>>GO TO 6
NO

>> Inspection End.

2009 Pathfinder

SEC-8

< BASIC INSPECTION >

[WITH INTELLIGENT KEY SYSTEM]

INSPECTION AND ADJUSTMENT

INSPECTION AND ADJUSTMENT

ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT

ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Special Repair Re-
quirement

INFOID:0000000003938414

Refer to the CONSULT-III Operation Manual-NATS.

ECM RE-COMMUNICATING FUNCTION

ECM RE-COMMUNICATING FUNCTION : Description

INFOID:0000000003938415

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 an 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.

• 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:0000000003938416

PERFORM ECM RE-COMMUNICATING FUNCTION

Install ECM.

Using a registered key (*2), turn ignition switch to “ON”.
*2: To perform this step, use the key that has been used before performing ECM replacement.

Maintain ignition switch in “ON” position for at least 5 seconds.

Turn ignition switch to “OFF”.

Start engine.

Can engine be started?

YES

>> Procedure is completed.

>> Initialize control unit. Refer to CONSULT-III Operation Manual.

2009 Pathfinder

INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION

SEC-9

< FUNCTION DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

SEC

FUNCTION DIAGNOSIS

INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION

System Diagram

INFOID:0000000003938417

System Description

INFOID:0000000003938418

INPUT/OUTPUT SIGNAL CHART

Intelligent Key Unit

IPDM E/R

BCM

SYSTEM DESCRIPTION

• The engine start function of Intelligent Key system is a system that makes it possible to start and stop the

engine without using the key. It verifies the electronic ID using two-way communications when pressing the
ignition knob 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.

Switch/Input signal

Input signal to

Intelligent Key unit

function

Actuator/Output signal

Key switch

Mechanical key
(insert/remove)

Engine start function

• KEY warning lamp/buzzer
• Steering lock unit
• Starter relay request (to IPDM E/R)
• Inside key antenna

(Instrument panel, center console,
luggage compartment)

• Key interlock solenoid

Ignition knob switch

Ignition knob
(push/release)

Steering lock unit

Steering lock
(lock/unlock)

Inside key antenna
(Front and rear center console, over-
head console, luggage compartment)

Intelligent key
(inside antenna detection
area or not.)

Switch/Input signal

Input signal to

IPDM E/R

IPDM E/R function

Actuator/Output signal

Park/neutral position switch

P, N range

Engine start function

• Starter relay
• Starter motor

Switch/Input signal

Input signal to

BCM

BCM function

Actuator/Output signal

Key switch

Brake
(press/release)

Engine start function

• Inside key antenna

(Instrument panel, center console,
luggage compartment)

ALKIA1267GB

2009 Pathfinder

SEC-10

< FUNCTION DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION

• Intelligent Key has 2 IDs (for Intelligent Key and for NATS). It can perform the door lock/unlock operation and

the engine start 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

mechanical key set in the Intelligent Key to the ignition key cylinder. At that time, perform the NATS ID verifi-
cation. If it is used when the Intelligent Key is carried, perform the Intelligent Key ID verification.

• If the ID is successfully verified, and when the ignition knob switch is pressed, steering lock will be released

and initiating the engine will be possible.

• The door lock/unlock operation can be performed when the Intelligent Key battery is discharged, by operat-

ing the driver door key cylinder using the mechanical key set in the Intelligent Key.

• Up to 4 Intelligent Keys can be registered (including the standard Intelligent Key) on request from the owner.

NOTE:
• Refer to

SEC-20, "COMMON ITEM : CONSULT-III Function (BCM - COMMON ITEM)"

for any functions

other than engine start function of Intelligent Key system.

PRECAUTIONS FOR INTELLIGENT KEY SYSTEM

• For vehicles equipped with the Intelligent Key system, the transponder [the chip for NATS ID verifi-

cation] is integrated into the Intelligent Key. Therefore, the Intelligent Key alone is capable of provid-
ing security clearance for the engine to start. Also, when the mechanical key alone is inserted into
the key cylinder, performs the NATS ID verification to allow the engine to start. For vehicles without
Intelligent Key system, the transponder is integrated into the mechanical key which must be inserted
into the key cylinder to perform the NATS ID verification to allow the engine to start.

OPERATION WHEN INTELLIGENT KEY IS CARRIED

When the ignition knob switch is ON, the Intelligent Key unit transmits the request signal to the Intelligent
Key.

The Intelligent Key receives the request signal and transmits the Intelligent Key ID signal to the Intelligent
Key unit.

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

Intelligent Key unit transmits the steering lock/unlock signal to steering lock unit if the verification results
are OK. For detail of key warning lamp operation, refer to

SEC-17, "System Description"

Release of the steering lock.

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.

IPDM E/R turns the starter control relay ON when receiving the starter request signal.

When shift position is in P or N position, battery power is supplied through the starter relay and operate
the starter motor and to start the cranking.

CAUTION:

If a malfunction is detected in the Intelligent Key system, the "NO KEY" warning message will be
displayed in the combination meter. At that time, the engine cannot be started.

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 MECHANICAL KEY IS USED

When the Intelligent Key battery is discharged, performs the NATS ID verification between the integrated tran-
sponder and BCM by inserting the mechanical key into the key cylinder, and then the engine can be started.
For details relating to starting the engine using mechanical key, refer to

SEC-13, "System Description"

STEERING LOCK OPERATION

Steering is locked by steering lock unit when ignition switch is in the LOCK position (the ignition knob is
released) and key switch is OFF (key is removed from ignition key cylinder).

2009 Pathfinder

INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION

SEC-11

< FUNCTION DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

SEC

Component Parts Location

INFOID:0000000003938419

ALKIA1717ZZ

BCM M18, M19, M20
(view with instrument panel LH removed)

Intelligent Key unit M164
(view with glove box removed)

IPDM E/R
E119, E120, E122, E124

ECM E16

Key switch and ignition knob switch M66
(view with steering column removed)

Steering lock solenoid M65

2009 Pathfinder

SEC-12

< FUNCTION DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION

Component Description

INFOID:0000000003938420

Remote keyless entry receiver M67
(view with instrument panel RH removed)

A/T device (park position switch) M158
(view with center console removed)

Inside key antenna 1 (instrument
panel) M68
(view with center console removed)

10. Inside key antenna 2 (center console)

M212
(view with center console removed)

11. Inside key antenna 3 (3rd row seat) B129

(behind 3

row seat)

12. Intelligent Key warning buzzer E60

13. Front door switch LH B8

RH B108

14. Rear door switch LH B18

RH B116

15. Back door latch (door ajar switch)

D502

16. A/T assembly F9 (with VQ40DE)

F70 (with VK56DE)

17. Combination meter M24

18. Vehicle security indicator lamp

Item

Function

Intelligent Key unit

Receives lock/unlock signal from remote keyless entry receiver, and then transmits to BCM.

BCM

Verifies the received signal from Intelligent Key, then informs ECM whether to allow engine start.

Remote keyless entry receiver

Receives lock/unlock signal from the Intelligent Key, and then transmits to Intelligent Key unit.

Intelligent Key

Transmits button operation to remote keyless entry receiver.

Ignition knob switch

Monitors the status of the ignition knob switch.

Steering lock solenoid

Locks the steering wheel when the ignition key is off and the Intelligent Key is outside the vehicle.

Inside key antenna

Detects if Intelligent Key is inside the vehicle.

Intelligent Key warning buzzer

Warns the user of the lock/unlock condition and inappropriate operations with the buzzer sound.

A/T device (park position switch)

Detects whether the shift lever is in park.

2009 Pathfinder

NVIS (NISSAN VEHICLE IMMOBILIZER SYSTEM-NATS)

SEC-13

< FUNCTION DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

SEC

NVIS (NISSAN VEHICLE IMMOBILIZER SYSTEM-NATS)

System Diagram

INFOID:0000000003938421

System Description

INFOID:0000000003938422

INPUT/OUTPUT SIGNAL CHART

Intelligent Key Unit

BCM

SYSTEM DESCRIPTION

NATS (Nissan Anti-Theft System) has the following immobilizer functions:
• Engine immobilizer shows high anti-theft performance to prevent engine from starting by other than the

owner.

• Only a key with key ID registered in BCM and ECM can start engine, and shows high anti-theft performance

to prevent key from being copied or stolen.

• Security indicator always flashes with mechanical key removed condition (key switch: OFF) and ignition

knob released condition on LOCK position (ignition knob switch: OFF).

• Therefore, NATS warns outsiders that the vehicle is equipped with the anti-theft system. Refer to

SEC-17,

"System Description"

• If system detects malfunction, security indicator illuminates when ignition switch is turned to ON position.
• If the owner requires, ignition key ID or mechanical key ID can be registered for up to 4 keys.
• During trouble diagnosis or when the following parts have been replaced, and if mechanical key is added,

registration* is required.

: All keys kept by the owner of the vehicle should be registered with mechanical key.

- ECM
- BCM

LIIA2537E

Switch/Input signal

Input signal to BCM

BCM function

Actuator/Output signal

Ignition knob switch

Ignition knob
(push/release)

NATS

• Steering lock unit

Key switch

Mechanical key
(Insert/remove)

Steering lock unit

Steering
(lock/unlock)

ECM

Engine status signal

Switch/Input signal

Input signal to BCM

BCM function

Actuator/Output signal

NATS antenna amp.

Key ID

NATS

• Security indicator lamp
• Starter request

ECM

Engine status signal

2009 Pathfinder

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