Nissan Pathfinder (2008 year). Manual - part 556

INTELLIGENT KEY UNIT

SEC-81

< ECU DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

C

D

E

F

G

H

I

J

L

M

A

B

SEC

N

O

P

ALKIA0474GB

SEC-82

< ECU DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

INTELLIGENT KEY UNIT

ALKIA0926GB

INTELLIGENT KEY UNIT

SEC-83

< ECU DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

C

D

E

F

G

H

I

J

L

M

A

B

SEC

N

O

P

ALKIA0927GB

SEC-84

< ECU DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

INTELLIGENT KEY UNIT

ALKIA0928GB

INTELLIGENT KEY UNIT

SEC-85

< ECU DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

C

D

E

F

G

H

I

J

L

M

A

B

SEC

N

O

P

ALKIA0929GB

SEC-86

< ECU DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

INTELLIGENT KEY UNIT

Fail Safe

INFOID:0000000001689578

DTC Inspection Priority Chart

INFOID:0000000001689579

If some DTCs are displayed at the same time, perform inspections one by one based on the following priority
chart.

DTC Index

INFOID:0000000001689580

NOTE:

Details of time display

• CRNT: Displays when there is a malfunction now or after returning to the normal condition until turning igni-

tion switch OFF 

→

 ON again.

• 1 - 39: Displayed if any previous malfunction is present when current condition is normal. It increases like 1

→

 2 

→

 3...38 

→

 39 after returning to the normal condition whenever ignition switch OFF 

→

 ON. The counter

remains at 39 even if the number of cycles exceeds it. It is counted from 1 again when turning ignition switch
OFF 

→

 ON after returning to the normal condition if the malfunction is detected again.

Display contents of CONSULT-III

Fail-safe

Cancellation

B2013: STRG COMM 1

• Inhibits steering look unlocking

Erase DTC

B2552: INTELLIGENT KEY

• Inhibits steering look unlocking
• Inhibits  engine cranking

(BCM)

• Fuel  cut

(ECM)

Erase DTC

B2590: NATS MALFUNCTION

• Inhibits steering look unlocking
• Inhibits  engine cranking

(BCM)

• Fuel  cut

(ECM)

Erase DTC

Priority

DTC

1

• U1000: CAN COMM CIRCUIT
• U1010: CONTROL UNIT (CAN)
• B2552: INTELLIGENT KEY

2

• B2013: STRG COMM 1
• B2590: NATS MALFUNCTION

CONSULT display

Detection condition

Fail-safe

Diagnosis

No DTC is detected.
further testing
may be required.

—

—

—

U1000: CAN COMM CIRCUIT

Intelligent Key unit cannot receive CAN communi-
cation signal continuously for 2 seconds or more.

—

Check CAN communi-
cation system.
Refer to 

SEC-25

U1010: CONTROL UNIT (CAN)

Intelligent Key unit detects internal CAN communi-
cation circuit malfunction.

—

Replace Intelligent Key 
unit.

B2013: STRG COMM 1

The ID verification result between Intelligent key 
unit and steering lock solenoid are NG. Or Intelligent 
Key unit cannot communicate with steering lock so-
lenoid.

×

Perform steering lock 
unit ID registration with 
CONSULT-III

B2552: INTELLIGENT KEY

Intelligent Key unit internal malfunction.

×

Replace Intelligent Key 
unit.

B2590: NATS MALFUNCTION

The ID verification result between Intelligent key 
unit and BCM are NG. Or Intelligent Key unit cannot 
communicate with BCM.

×

Check NATS
Refer to 

SEC-39

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

SEC-87

< ECU DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

C

D

E

F

G

H

I

J

L

M

A

B

SEC

N

O

P

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

Reference Value

INFOID:0000000001689581

VALUES ON THE DIAGNOSIS TOOL

Refer to 

PCS-17, "Reference Value"

.

TERMINAL LAYOUT

Refer to 

PCS-19, "Terminal Layout"

.

Fail Safe

INFOID:0000000001689582

Refer to 

PCS-26, "Fail Safe"

.

DTC Index

INFOID:0000000001689583

Refer to 

PCS-28, "DTC Index"

.

SEC-88

< 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:0000000001689584

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-93

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-46

2.

Check ignition knob switch.

DLK-97

3.

Check key switch (BCM input).

DLK-96

4.

Check key switch (Intelligent Key unit input).

DLK-94

5.

Replace Intelligent Key unit.

SEC-93

6.

Check green "KEY" indicator.

DLK-76

7.

Check red "KEY" indicator.

DLK-76

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

1a.

Check inside key antenna 1 (instrument panel).

DLK-40

1b.

Check inside key antenna 2 (luggage compartment).

DLK-42

1c.

Check inside key antenna 3 (center console).

DLK-44

2.

Replace Intelligent Key unit.

SEC-93

Ignition switch does not turn on with mechanical key

1.

Check key switch  (BCM input).

DLK-96

2.

Check key switch  (Intelligent Key unit input).

DLK-94

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

1.

Check transmission signal.

TM-50

2.

Check stop lamp switch.

EXL-81

"P-SHIFT" indicator does not operate properly

1.

Check "P-SHIFT" indicator.

DLK-76