Nissan Pathfinder (2009 year). Manual - part 586

SEC-110

< ECU DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)

If No CAN Communication Is Available With BCM

IGNITION RELAY MALFUNCTION DETECTION FUNCTION

• IPDM E/R monitors the voltage at the contact circuit and excitation coil circuit of the ignition relay inside it. 
• IPDM E/R judges the ignition relay error if the voltage differs between the contact circuit and the excitation

coil circuit.

• If the ignition relay cannot turn OFF due to contact seizure, it activates the tail lamp relay for 10 minutes to

alert the user to the ignition relay malfunction when the ignition switch is turned OFF.

NOTE:

The tail lamp turns OFF when the ignition switch is turned ON.

FRONT WIPER CONTROL

IPDM E/R detects front wiper stop position by a front wiper auto stop signal.
When a front wiper auto stop signal is in the conditions listed below, IPDM E/R stops power supply to wiper
after repeating a front wiper 10 second activation and 20 second stop five times.

NOTE:
This operation status can be confirmed on the IPDM E/R “DATA MONITOR” that displays “Block” for the item
“WIP PROT” while the wiper is stopped.

STARTER MOTOR PROTECTION FUNCTION

IPDM E/R turns OFF the starter control relay to protect the starter motor when the starter control relay remains
active for 90 seconds.

Control part

Fail-safe in operation

Cooling fan

• Turns ON the cooling fan relay when the ignition switch is turned ON
• Turns OFF the cooling fan relay when the ignition switch is turned OFF

Control part

Fail-safe in operation

Headlamp

• Turns ON the headlamp low relay when the ignition switch is turned ON
• Turns OFF the headlamp low relay when the ignition switch is turned OFF
• Headlamp (LH/RH) high relays OFF

• Parking  lamps
• License plate lamps
• Tail lamps

• Turns ON the tail lamp relay when the ignition switch is turned ON
• Turns OFF the tail lamp relay when the ignition switch is turned OFF

Front wiper

• The status just before activation of fail-safe control is maintained until the ignition 

switch is turned OFF while the front wiper is operating at LO or HI speed.

• The wiper is operated at LO speed until the ignition switch is turned OFF if the fail-

safe control is activated while the front wiper is set in the INT mode and the front wiper 
motor is operating.

Rear window defogger

Rear window defogger relay OFF

A/C compressor

A/C relay OFF

Front fog lamps (if equipped)

Front fog lamp relay OFF

Ignition switch

Ignition relay

Tail lamp relay

ON

ON

—

OFF

OFF

—

Ignition switch

Front wiper switch

Auto stop signal

ON

OFF

Front wiper stop position signal cannot be 
input 10 seconds.

ON

The signal does not change for 10 seconds.

2009 Pathfinder

IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)

SEC-111

< ECU DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

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DTC Index

INFOID:0000000004432091

NOTE:
The details of TIME display are as follows.
• CRNT: The malfunctions that are detected now
• 1 - 39: The number is indicated when it is normal at present and a malfunction was detected in the past. It

increases like 0 

→

 1 

→

 2 ··· 38 

→

 39 after returning to the normal condition whenever IGN OFF 

→

 ON. It is

fixed to 39 until the self-diagnosis results are erased if it is over 39. It returns to 0 when a malfunction is
detected again in the process.

CONSULT-III display

Fail-safe

TIME

NOTE

Refer to

No DTC is detected.
further testing
may be required.

—

—

—

—

U1000: CAN COMM CIRCUIT

×

CRNT

1 – 39

PCS-17

2009 Pathfinder

SEC-112

< SYMPTOM DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION SYMPTOMS

SYMPTOM DIAGNOSIS

INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION SYMPTOMS

Symptom Table

INFOID:0000000003938493

NOTE:
• Before performing the diagnosis in the following table, check “

SEC-5, "Work Flow"

”. 

• Check that vehicle is under the condition shown in “Conditions of vehicle” before starting diagnosis, and

check each symptom.

• Engine cranking is enabled when the shift lever is in the "Park" position, and in the "Neutral" position only if

the brake pedal is depressed.

• If the following symptoms are detected, check systems shown in the “Diagnosis/service procedure” column

in this order.

CONDITIONS OF VEHICLE (OPERATING CONDITIONS)

• Engine start function is ON when setting on CONSULT-III.
• Mechanical key is not inserted in key cylinder.
• One or more of Intelligent Keys with registered Intelligent Key ID is in the vehicle.

Symptom

Diagnosis/service procedure

Reference 

page

Ignition switch does not turn on with Intelligent Key.
[green "KEY" lamp is displayed]

1.

Check steering lock solenoid.

SEC-27

2.

Replace Intelligent Key unit.

SEC-119

Ignition switch does not turn on with Intelligent Key.
["KEY" lamp does not display]

1.

Check Intelligent Key unit power supply and ground circuit.

DLK-55

2.

Check ignition knob switch.

DLK-112

3.

Check key switch (BCM input).

DLK-111

4.

Check key switch (Intelligent Key unit input).

DLK-109

5.

Replace Intelligent Key unit.

SEC-119

6.

Check green "KEY" indicator.

DLK-91

7.

Check red "KEY" indicator.

DLK-91

Ignition switch does not turn on with Intelligent Key.
[red "KEY" lamp is displayed]

1a.

Check inside key antenna 1 (instrument panel).

DLK-49

1b.

Check inside key antenna 2 (luggage compartment).

DLK-51

1c.

Check inside key antenna 3 (center console).

DLK-53

2.

Replace Intelligent Key unit.

SEC-119

Ignition switch does not turn on with mechanical key

1.

Check key switch  (BCM input).

DLK-111

2.

Check key switch  (Intelligent Key unit input).

DLK-109

Engine cannot be cranked with transmission in "Park" 
or in "Neutral" position with brake pedal depressed

1.

Check transmission signal.

TM-51

2.

Check stop lamp switch.

EXL-88

"P-SHIFT" indicator does not operate properly

1.

Check "P-SHIFT" indicator.

DLK-91

2009 Pathfinder

VEHICLE SECURITY SYSTEM SYMPTOMS

SEC-113

< SYMPTOM DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

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VEHICLE SECURITY SYSTEM SYMPTOMS

Symptom Table

INFOID:0000000003938494

*: Check the system is in the armed phase.

Procedure

Diagnostic procedure

Refer to page

Symptom

1

Vehicle security sys-
tem cannot be set by 
····

Door switch

Check door switch (LF, RF, LR, RR, back) 

DLK-57

Glass ajar switch

Check glass ajar switch

DLK-60

Intelligent Key

Check Intelligent Key system

SEC-9

Key cylinder switch

Check key cylinder switch

SEC-43

—

Check Intermittent Incident

GI-49

Security indicator does not turn ON.

Check vehicle security indicator

SEC-50

Check Intermittent Incident

GI-49

2

* Vehicle security 
system does not 
sound alarm when ····

Any door is opened.

Check door switch (LF, RF, LR, RR, back) 

DLK-57

Glass ajar switch

Check glass ajar switch

DLK-60

—

Check Intermittent Incident

GI-49

3

Vehicle security 
alarm does not acti-
vate.

Horn alarm

Check horn switch

HRN-3

Check Intermittent Incident

GI-49

4

Vehicle security sys-
tem cannot be can-
celed by ····

Intelligent Key

Check Intelligent Key system

SEC-9

Key cylinder switch

Check key cylinder switch

SEC-43

—

Check Intermittent Incident

GI-49

2009 Pathfinder

SEC-114

< SYMPTOM DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

NISSAN VEHICLE IMMOBILIZER SYSTEM-NATS SYMPTOMS

NISSAN VEHICLE IMMOBILIZER SYSTEM-NATS SYMPTOMS

Symptom Table

INFOID:0000000003938495

NOTE:
• Before performing the diagnosis in the following table, check “

SEC-5, "Work Flow"

”. 

• Check that vehicle is under the condition shown in “Conditions of vehicle” before starting diagnosis, and

check each symptom.

• If the following symptoms are detected, check systems shown in the “Diagnosis/service procedure” column

in this order.

CONDITIONS OF VEHICLE (OPERATING CONDITIONS)

• Mechanical key is not inserted into key cylinder.
• Ignition knob switch is not depressed.

Symptom

Diagnosis/service procedure

Reference page

Security indicator does not turn ON or flash.

1. Check vehicle security indicator

SEC-50

2. Check Intermittent Incident

GI-49

2009 Pathfinder

PRE-INSPECTION FOR DIAGNOSTIC

SEC-115

< ON-VEHICLE MAINTENANCE >

[WITH INTELLIGENT KEY SYSTEM]

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ON-VEHICLE MAINTENANCE

PRE-INSPECTION FOR DIAGNOSTIC

Basic Inspection

INFOID:0000000003938496

The engine start function, door lock function, power distribution system and NATS-IVIS/NMS in the Intelligent
Key system are closely related to each other regarding control. Narrow down the functional area in question
by performing basic inspection to identify which function is malfunctioning. The vehicle security function can
operate only when the door lock and power distribution system are operating normally. Therefore, it is easy to
identify any factor unique to the vehicle security system by performing the vehicle security operation check
after basic inspection.

1.

CHECK DOOR LOCK OPERATION

1.

Check the door lock for normal operation with the Intelligent Key controller and door request switch.
Successful door lock operation with the Intelligent Key and request SW indicates that the remote keyless
entry receiver and inside key antenna required for engine start are functioning normally.
Identify the malfunctioning point by referring to the DLK section if the door cannot be unlocked.

Can the door be locked with the Intelligent Key and door request switch?

YES

>> GO TO 2

NO

>> Refer to 

DLK-171, "Symptom Table"

.

2.

CHECK ENGINE STARTING

1.

Checks that the engine starts when operating the Intelligent Key.

Does the engine start?

YES

>> GO TO 3

NO

>> Refer to 

SEC-112, "Symptom Table"

.

3.

CHECK STEERING LOCKING

1.

Does the steering lock when operating door switch after switching the power supply from ON position (or
ACC position) to LOCK position?
If door switch is malfunctioning, BCM cannot lock the steering. If BCM does not detect DTC, steering lock
unit is normal.

Does steering lock?

YES

>> GO TO 4

NO

>> Refer to 

DLK-95, "Diagnosis Procedure"

.

4.

CHECK IGNITION KNOB SWITCH OPERATION

1.

Press ignition knob to check switch operation.

Does the combination meter display any message?

YES

>> GO TO 5

NO

>> Refer to 

SEC-47, "Ignition Knob Switch Check"

.

5.

CHECK VEHICLE SECURITY SYSTEM

1.

Check the vehicle security system for normal operation.
The vehicle security function can operate only when the door lock and power distribution functions are
operating normally. 
Therefore, it is easy to identify any factor unique to the vehicle security by performing the vehicle security
operation check after this basic inspection.

>> Refer to 

SEC-115, "Vehicle Security Operation Check"

.

Vehicle Security Operation Check

INFOID:0000000003938497

1.

INSPECTION START

Turn ignition switch “OFF”.
NOTE:
Before starting operation check, open front windows.

2009 Pathfinder

SEC-116

< ON-VEHICLE MAINTENANCE >

[WITH INTELLIGENT KEY SYSTEM]

PRE-INSPECTION FOR DIAGNOSTIC

>> GO TO 2

2.

CHECK SECURITY INDICATOR LAMP

1.

Lock doors using Intelligent Key or mechanical key.

2.

Check that security indicator lamp illuminates for 30 seconds.

Security indicator lamp should illuminate.

OK

>> GO TO 3

NG

>> Perform diagnosis and repair. Refer to 

SEC-50, "Diagnosis Procedure"

.

3.

CHECK ALARM FUNCTION

1.

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

2.

Open any door before unlocking with Intelligent Key or mechanical key, or open back door or glass hatch
without the presence of Intelligent Key.

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-112, "Symptom

Table"

.

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

SEC-112, "Symptom Table"

.

4.

CHECK ALARM CANCEL OPERATION

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

OK

>> Inspection End.

NG

>> Check door lock function. Refer to 

SEC-113, "Symptom Table"

.

2009 Pathfinder

PRECAUTIONS

SEC-117

< PRECAUTION >

[WITH INTELLIGENT KEY SYSTEM]

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PRECAUTION

PRECAUTIONS

Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT 
PRE-TENSIONER"

INFOID:0000000004448902

The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SR and SB section of this Service Man-
ual.

WARNING:

• To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death in

the event of a collision which would result in air bag inflation, all maintenance must be performed by
an authorized NISSAN/INFINITI dealer.

• Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal

injury caused by unintentional activation of the system. For removal of Spiral Cable and Air Bag
Module, see the SR section.

• Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this

Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or har-
ness connectors.

Precaution Necessary for Steering Wheel Rotation After Battery Disconnect

INFOID:0000000004448901

NOTE:
• This Procedure is applied only to models with Intelligent Key system and NATS (NISSAN ANTI-THEFT SYS-

TEM).

• Remove and install all control units after disconnecting both battery cables with the ignition knob in the

″

LOCK

″

 position.

• Always use CONSULT-III to perform self-diagnosis as a part of each function inspection after finishing work.

If DTC is detected, perform trouble diagnosis according to self-diagnostic results.

For models equipped with the Intelligent Key system and NATS, an electrically controlled steering lock mech-
anism is adopted on the key cylinder.
For this reason, if the battery is disconnected or if the battery is discharged, the steering wheel will lock and
steering wheel rotation will become impossible.
If steering wheel rotation is required when battery power is interrupted, follow the procedure below before
starting the repair operation.

OPERATION PROCEDURE

1.

Connect both battery cables.
NOTE:
Supply power using jumper cables if battery is discharged.

2.

Use the Intelligent Key or mechanical key to turn the ignition switch to the 

″

ACC

″

 position. At this time, the

steering lock will be released.

3.

Disconnect both battery cables. The steering lock will remain released and the steering wheel can be
rotated.

4.

Perform the necessary repair operation.

5.

When the repair work is completed, return the ignition switch to the 

″

LOCK

″

 position before connecting

the battery cables. (At this time, the steering lock mechanism will engage.)

6.

Perform a self-diagnosis check of all control units using CONSULT-III. 

2009 Pathfinder