Nissan Pathfinder (2012 year). Manual - part 541

DIAGNOSIS AND REPAIR WORKFLOW

SEC-117

< BASIC INSPECTION >

[WITHOUT INTELLIGENT KEY SYSTEM]

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1.

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

2.

CHECK DTC

1. Check DTC for BCM.

2. 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.

3. 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

3.

CONFIRM THE SYMPTOM

Confirm the symptom described by the customer.

Connect CONSULT 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

4.

CONFIRM THE SYMPTOM

Confirm the symptom described by the customer.

Connect CONSULT 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

5.

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 

BCS-43, "DTC Inspection Priority Chart"

 (BCM) and determine

trouble diagnosis order.
Is DTC detected?

YES

>> GO TO 8

NO

>> Refer to 

GI-37, "Intermittent Incident"

.

6.

PERFORM BASIC INSPECTION

Perform Basic Inspection. Refer to 

SEC-119, "Basic Inspection"

.

>> GO TO 7

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

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

August 2012

2012 Pathfinder

2012 Pathfinder

SEC-118

< BASIC INSPECTION >

[WITHOUT INTELLIGENT KEY SYSTEM]

DIAGNOSIS AND REPAIR WORKFLOW

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 and replace-

ment.

3. 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.

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2012 Pathfinder

PRE-INSPECTION FOR DIAGNOSTIC

SEC-119

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[WITHOUT INTELLIGENT KEY SYSTEM]

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PRE-INSPECTION FOR DIAGNOSTIC

Basic Inspection

INFOID:0000000007355760

1.

INSPECTION START

Turn ignition switch “OFF”.

NOTE:

Before starting operation check, open front windows.

>> GO TO 2

2.

CHECK SECURITY INDICATOR LAMP

1. Lock doors using keyfob or mechanical key.

2. Check that security indicator lamp illuminates for 30 seconds.
Does the security indicator lamp illuminate?

YES

>> GO TO 3

NO

>> Perform diagnosis and repair. Refer to 

SEC-124, "System Description"

.

3.

CHECK ALARM FUNCTION

1. After 30 seconds, security indicator lamp will start to blink.

2. Open any door before unlocking with keyfob or mechanical key, or open back door or glass hatch without

keyfob.

Does the alarm function properly?

YES

>> GO TO 4

NO

>> Check the following.

• The vehicle security system does not phase in alarm mode. Refer to 

SEC-181, "Symptom

Table"

.

• Alarm (horn and headlamps) does not operate. Refer to 

SEC-181, "Symptom Table"

.

4.

CHECK ALARM CANCEL OPERATION

Unlock any door using keyfob or mechanical key.
Alarm (horn and headlamps) should stop.

YES

>> Inspection End.

NO

>> Check door lock function. Refer to 

DLK-215, "DOOR LOCK AND UNLOCK SWITCH : System

Description"

.

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2012 Pathfinder

SEC-120

< 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:0000000007355761

Refer to the CONSULT Immobilizer mode and follow the on-screen instructions.

ECM RE-COMMUNICATING FUNCTION
ECM RE-COMMUNICATING FUNCTION : Description

INFOID:0000000007355762

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 is not necessary)

NOTE:

•

When registering new Key IDs or replacing the ECM that is not brand new, refer to CONSULT Immo-

bilizer mode and follow the on-screen instructions.

•

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:0000000007355763

1.

PERFORM ECM RE-COMMUNICATING FUNCTION

1. Install ECM.

2. 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.

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 Immobilizer mode and follow the on-screen instructions.

2012 Pathfinder

NVIS (NISSAN VEHICLE IMMOBILIZER SYSTEM-NATS)

SEC-121

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SYSTEM DESCRIPTION

NVIS (NISSAN VEHICLE IMMOBILIZER SYSTEM-NATS)

System Diagram

INFOID:0000000007355764

System Description

INFOID:0000000007355765

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.

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

SEC-124,

"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. 

*1

: 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.

When NATS initialization has been completed, the ID of the inserted mechanical key or mechanical key IDs

can be carried out.

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

“Work Flow”, Refer to 

SEC-116, "Work Flow"

.

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

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2012 Pathfinder

SEC-122

< SYSTEM DESCRIPTION >

[WITHOUT INTELLIGENT KEY SYSTEM]

NVIS (NISSAN VEHICLE IMMOBILIZER SYSTEM-NATS)

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

dure, refer to 

SEC-120, "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:0000000007355766

ALKIA1271ZZ

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2012 Pathfinder

NVIS (NISSAN VEHICLE IMMOBILIZER SYSTEM-NATS)

SEC-123

< SYSTEM DESCRIPTION >

[WITHOUT INTELLIGENT KEY SYSTEM]

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Component Description

INFOID:0000000007355767

1.

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

2.

NATS antenna amp. M21

3.

ECM E16

4.

IPDM E/R E121
(view with cover removed)

5.

Combination meter M24

6.

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 shift selector (park position 
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.

August 2012

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2012 Pathfinder

SEC-124

< SYSTEM DESCRIPTION >

[WITHOUT INTELLIGENT KEY SYSTEM]

VEHICLE SECURITY SYSTEM

VEHICLE SECURITY SYSTEM

System Diagram

INFOID:0000000007355768

System Description

INFOID:0000000007355769

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

including glass hatch 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 50 seconds.

• Any door is opened.

ALKIA0706GB

PIIA1367E

August 2012

2012 Pathfinder

2012 Pathfinder