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Nissan Pathfinder (2008 year). Manual - part 558

DIAGNOSIS AND REPAIR WORKFLOW

SEC-97

< BASIC INSPECTION >

[WITHOUT INTELLIGENT KEY SYSTEM]

SEC

BASIC INSPECTION

DIAGNOSIS AND REPAIR WORKFLOW

Work Flow

INFOID:0000000001689590

OVERALL SEQUENCE

DETAILED FLOW

ALKIA0538GB

SEC-98

< BASIC INSPECTION >

[WITHOUT 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-144, "DTC Inspection Priority Chart"

(BCM) and determine

trouble diagnosis order.

Is DTC detected?

YES

>> GO TO 8.

>> Refer to

GI-51, "Intermittent Incident"

PERFORM BASIC INSPECTION

Perform Basic Inspection. Refer to

SEC-91, "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.

DIAGNOSIS AND REPAIR WORKFLOW

SEC-99

< BASIC INSPECTION >

[WITHOUT 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

SEC-100

< BASIC INSPECTION >

[WITHOUT 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:0000000001689591

Refer to the CONSULT-III Operation Manual-NATS.

ECM RE-COMMUNICATING FUNCTION

ECM RE-COMMUNICATING FUNCTION : Description

INFOID:0000000001689592

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:0000000001689593

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 NATS.

NVIS (NISSAN VEHICLE IMMOBILIZER SYSTEM-NATS)

SEC-101

< FUNCTION DIAGNOSIS >

[WITHOUT INTELLIGENT KEY SYSTEM]

SEC

FUNCTION DIAGNOSIS

NVIS (NISSAN VEHICLE IMMOBILIZER SYSTEM-NATS)

System Diagram

INFOID:0000000001689594

System Description

INFOID:0000000001689595

INPUT/OUTPUT SIGNAL CHART

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-104,

"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 5 keys.
• During trouble diagnosis or when the following parts have been replaced, and if ignition key is added, regis-

tration* is required.

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

- ECM
- BCM
- Ignition key
- Remote keyless entry receiver
• NATS trouble diagnosis, system initialization and additional registration of other mechanical key IDs must be

carried out using CONSULT-III.
When NATS initialization has been completed, the ID of the inserted mechanical key or mechanical key IDs
can be carried out.

PIIA1121E

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

SEC-102

< FUNCTION DIAGNOSIS >

[WITHOUT INTELLIGENT KEY SYSTEM]

NVIS (NISSAN VEHICLE IMMOBILIZER SYSTEM-NATS)

• Possible symptom of NATS malfunction is “Engine cannot start”. Identify the possible causes according to

“Work Flow”, Refer to

SEC-97, "Work Flow"

• If ECM other than Genuine NISSAN is installed, the engine cannot be started. For ECM replacement proce-

dure, refer to

SEC-100, "ECM RE-COMMUNICATING FUNCTION : Description"

PRECAUTIONS FOR KEY REGISTRATION

• The key registration is a procedure that erases the current NATS ID once, and then re-registers a new ID.

Therefore the registered key is necessary for this procedure. Before starting the registration operation collect
all registered Keys from the customer.

• The NATS ID registration is the procedure that registers the ID stored into the transponder (integrated in

mechanical key) to BCM.
The key ID registration is the procedure that registers the ID to the BCM.

• When performing the key system registration only, the engine cannot be started by inserting the key into the

key cylinder. When performing the NATS registration only, the engine cannot be started by using the ignition
key.

SECURITY INDICATOR

• Always flashes with ignition key in the OFF position.

MAINTENANCE INFORMATION

CAUTION:

It is necessary to perform NATS ID registration when replacing any of the following part.
If it's not (or fail to do so), the electrical system may not operate properly.

• BCM
• ECM
• IPDM E/R
• Ignition key
• NATS antenna amp.
• Combination meter

Component Parts Location

INFOID:0000000001689596

ALKIA1271ZZ

NVIS (NISSAN VEHICLE IMMOBILIZER SYSTEM-NATS)

SEC-103

< FUNCTION DIAGNOSIS >

[WITHOUT INTELLIGENT KEY SYSTEM]

SEC

Component Description

INFOID:0000000001689597

BCM M18, M20
(view with instrument panel LH re-
moved)

NATS antenna amp. M21

ECM E16

IPDM E/R E119, E120, E122, E124
(view with cover removed)

Combination meter M24

Security indicator lamp

Item

Function

BCM

Verifies the received signal from the ignition key ID, then informs ECM whether to allow engine start.

Remote keyless entry receiver

Receives lock/unlock signal from the keyfob, and then transmits to the BCM.

A/T device (detention key switch)

Detects whether the shift lever is in park.

NATS antenna amp.

Detects the ignition key presence in the ignition key cylinder.

Security indicator

Indicates the status of the security system.

IPDM E/R

Powers-up the horn and the headlamps in case of a security breach.

SEC-104

< FUNCTION DIAGNOSIS >

[WITHOUT INTELLIGENT KEY SYSTEM]

VEHICLE SECURITY SYSTEM

VEHICLE SECURITY SYSTEM

System Diagram

INFOID:0000000001689598

System Description

INFOID:0000000001689599

DESCRIPTION

The security system provides an audible and visual alarm when an unauthorized access to the vehicle is
detected while the system is in armed phase.
The security system consist of the BCM managing the audible alarm (horn) and the visual alarm (headlamps).

OPERATION FLOW

Disarmed Phase

When the vehicle is being driven or when doors are open, the theft warning system is set in the disarmed
phase on the assumption that the owner is inside or near the vehicle.

Pre-Armed Phase And Armed Phase

The vehicle security system turns into the pre-armed phase when ignition switch is in OFF position, all doors
are closed and locked (using keyfob, doorlock/unlock switch, driver key cylinder or auto relock function). The
system automatically shifts into the armed phase.

Condition of Activating The System

When the following condition is performed in armed phase, the system sounds the horns and flashes the
headlamps for about 30 seconds.
• Any door is opened.

ALKIA0706GB

PIIA1367E

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