Nissan Pathfinder (2008 year). Manual - part 142

DIAGNOSIS SYSTEM (INTELLIGENT KEY UNIT)

DLK-37

< FUNCTION DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

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ACTIVE TEST

AS REQ SW

Indicates [ON (pressed)/OFF (released)] condition of door request switch (passenger 
side).

IGN SW

Indicates [ON (ON or START position)/OFF (other than ON and START position)] con-
dition of ignition switch ON position.

ACC SW

Indicates [ON/OFF] condition of ignition switch ACC position.

DOOR LOCK SIG

Indicates [ON/OFF] condition of LOCK signal from Intelligent Key.

DOOR UNLOCK SIG

Indicates [ON/OFF] condition of UNLOCK signal from Intelligent Key.

DOOR SW DR

Indicates [OPEN/CLOSE] condition of front door switch (driver side) from BCM via CAN 
communication.

DOOR SW AS

Indicates [OPEN/CLOSE] condition of front door switch (passenger side) from BCM via 
CAN communication.

DOOR SW RR

Indicates [OPEN/CLOSE] condition of rear door switch (RH) from BCM via CAN com-
munication.

DOOR SW RL

Indicates [OPEN/CLOSE] condition of rear door switch (LH) from BCM via CAN com-
munication.

DOOR BK SW

Indicates [OPEN/CLOSE] condition of back door switch from BCM via CAN communi-
cation.

VEHICLE SPEED

Displays the vehicle speed signal received from combination meter by numerical value 
[km/h].

Monitor Item

Condition

Test item

Description

DOOR LOCK/UNLOCK

This test is able to check door lock/unlock operation. 
• ALL UNLK: All door lock actuators are unlocked.
• DR UNLK: Door lock actuator (driver side) is unlocked.
• AS UNLK: Door lock actuator (passenger side) is unlocked.
• BK UNLK: This item is indicated, but inactive.
• LOCK: All door lock actuator is locked.

ANTENNA

This test is able to check Intelligent Key antenna operation. 
When the following condition are met, hazard warning lamps flash.
• ROOM ANT1: Inside key antenna (instrument panel) detects Intelligent Key, when 

“ROOM ANT1” is selected.

• ROOM ANT2: Inside key antenna (luggage compartment) detects Intelligent Key, 

when “ROOM ANT2”is selected.

• ROOM ANT3: Inside key antenna (center console) detects Intelligent Key, when 

“ROOM ANT3” is selected.

• DRIVER ANT: Outside key antenna (driver side) detects Intelligent Key, when “DRIV-

ER ANT” is selected.

• ASSIST ANT: Outside key antenna (passenger side) detects Intelligent Key, when 

“ASSIST ANT” is selected.

• BK DOOR ANT: Outside key antenna (rear bumper) detects Intelligent Key, when “BK 

DOOR ANT” is selected.

OUTSIDE BUZZER

This test is able to check Intelligent Key warning buzzer operation.
• ON
• OFF 

INSIDE BUZZER

This test is able to check warning chime in combination meter operation.
• TAKE OUT: Take away warning chime sounds.
• KNOB: Ignition knob switch warning chime sounds.
• KEY: Key warning chime sounds.
• OFF

DLK-38

< COMPONENT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

U1000 CAN COMM CIRCUIT

COMPONENT DIAGNOSIS

U1000 CAN COMM CIRCUIT

Description

INFOID:0000000001563481

CAN (Controller Area Network) is a serial communication line for real time applications. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Modern
vehicle is equipped with many electronic control unit, and each control unit shares information and links with
other control units during operation (not independent). In CAN communication, control units are connected
with 2 communication lines (CAN H-line, CAN L-line) allowing a high rate of information transmission with less
wiring. Each control unit transmits/receives data but selectively reads required data only.
CAN Communication Signal Chart. Refer to 

LAN-57, "CAN Communication Signal Chart"

.

DTC Logic

INFOID:0000000001563482

DTC DETECTION LOGIC

Diagnosis Procedure

INFOID:0000000001563483

1.

PERFORM SELF DIAGNOSTIC

1.

Turn ignition switch ON and wait for 2 second or more.

2.

Check “Self Diagnostic Result”.

Is “CAN COMM CIRCUIT” displayed?

YES

>> Refer to 

DLK-38, "Diagnosis Procedure"

.

NO

>> Refer to 

GI-51, "Intermittent Incident"

.

DTC

CONSULT-III display 

description

DTC Detection Condition

Possible cause

U1000

CAN COMM CIRCUIT

When BCM cannot communicate CAN com-
munication signal continuously for 2 sec-
onds or more.

In CAN communication system, any item (or items) 
of the following listed below is malfunctioning.
• Transmission
• Receiving (ECM)
• Receiving (VDC/TCS/ABS)
• Receiving (METER/M&A)
• Receiving (TCM)

U1010 CONTROL UNIT (CAN)

DLK-39

< COMPONENT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

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U1010 CONTROL UNIT (CAN)

DTC Logic

INFOID:0000000001563484

DTC DETECTION LOGIC

Diagnosis Procedure

INFOID:0000000001563485

1.

REPLACE BCM

When DTC [U1010] is detected, replace BCM.

>> Replace BCM.

Special Repair Requirement

INFOID:0000000001563486

1.

REQUIRED WORK WHEN REPLACING BCM

The BCM must be initialized when replaced. Refer to (Body Control System) for BCM configuration.
Initialize NVIS by CONSULT-III. For the details of initialization refer to CONSULT-III operation manual NATS-
IVIS/NVIS.

>> Work end.

DTC

CONSULT-III display de-

scription

DTC Detection Condition

Possible cause

U1010

CONTROL UNIT (CAN)

BCM detected internal CAN communication circuit malfunction.

BCM

DLK-40

< COMPONENT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

INSIDE KEY ANTENNA 1 (INSTRUMENT PANEL)

INSIDE KEY ANTENNA 1 (INSTRUMENT PANEL)

Description

INFOID:0000000001563487

Detects whether Intelligent Key is inside the vehicle.

Component Function Check

INFOID:0000000001563488

1.

CHECK INSIDE KEY ANTENNA INPUT SIGNAL

With CONSULT-III

1.

Check “ANTENNA” in “Active Test” mode with CONSULT-III.

2.

Touch “INSIDE KEY ANTENNA 1”.

3.

When Intelligent Key is inside key antenna (instrument panel) detection area, hazard lamps flash.

Is the inspection result normal?

YES

>> Inside key antenna 1 (instrument panel) is OK.

NO

>> Refer to 

DLK-40, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000001563489

1.

CHECK INSIDE KEY ANTENNA POWER SUPPLY SIGNAL

1.

Turn ignition switch OFF.

2.

Check signal between Intelligent Key unit connector and ground with an oscilloscope.

Is the inspection result normal?

YES

>> Inside key antenna 1 (instrument panel) is OK.

NO

>> GO TO 2.

2.

CHECK INSIDE KEY ANTENNA

1.

Disconnect Intelligent Key unit connector and inside key antenna 1 (instrument panel) connectors.

2.

Check continuity between Intelligent Key unit harness connector (A) M164 terminals 15, 16 and inside key
antenna 1 (instrument panel) harness connector (B) M68 terminals 1, 2.

3.

Check continuity between Intelligent Key unit harness connector
(A) M164 terminals 15, 16 and ground.

Test Item

Condition

Possible cause

INSIDE KEY ANTENNA 1

An excessive high or low voltage from inside 

antenna is sent to the Intelligent Key Unit

•  Inside key antenna 1 (instrument panel)
•  Between Intelligent Key unit and inside key antenna 1 (in-

strument panel)

Connector

Item

Terminals

Condition

Signal (V)

(Reference value)

(+)

(–)

M164

Intelligent 

Key unit

15

Ground

Ignition 
switch is 
pushed.

ALKIA0585ZZ

PIIB7441E

Intelligent Key 
unit connector

Terminals

Inside key antenna 

1 (instrument panel) 

connector

Terminals

Continuity

A: M164

15

B: M68

1

Yes

16

2

ALKIA0586ZZ

INSIDE KEY ANTENNA 1 (INSTRUMENT PANEL)

DLK-41

< COMPONENT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

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Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace harness between Intelligent Key unit and inside key antenna 1 (instrument

panel).

3.

CHECK INSIDE KEY ANTENNA POWER SUPPLY SINGAL

1.

Replace inside key antenna. (New antenna or other antenna)

2.

Connect Intelligent Key unit connector.

3.

Check signal between Intelligent Key unit connector and ground
with oscilloscope.

Is the inspection result normal?

YES

>> Replace inside key antenna 1 (instrument panel).

NO

>> Replace Intelligent Key unit. Refer to 

SEC-95, "Removal and Installation"

.

Item

Connector

Terminals

Continuity

Intelligent Key 

unit

A: M164

15

Ground

No

16

Connector

Item

Terminals

Condition

Signal (V)

(Reference value)

(+)

(–)

M164

Intelligent 

Key unit

15

Ground

Ignition 
switch is 
pushed.

ALKIA0585ZZ

PIIB7441E

DLK-42

< COMPONENT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

INSIDE KEY ANTENNA 2 (LUGGAGE COMPARTMENT)

INSIDE KEY ANTENNA 2 (LUGGAGE COMPARTMENT)

Description

INFOID:0000000001563496

Detects whether Intelligent Key is inside the vehicle.

Component Function Check

INFOID:0000000001563497

1.

CHECK INSIDE KEY ANTENNA INPUT SIGNAL

With CONSULT-III

1.

Check “ANTENNA” in “Active Test” mode with CONSULT-III.

2.

Touch “INSIDE KEY ANTENNA 2”.

3.

When Intelligent Key is inside key antenna (luggage compartment) detection area, hazard lamps flash.

Is the inspection result normal?

YES

>> Inside key antenna 2 (luggage compartment) is OK.

NO

>> Refer to 

DLK-42, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000001563498

1.

CHECK INSIDE KEY ANTENNA POWER SUPPLY SIGNAL

1.

Turn ignition switch OFF.

2.

Check signal between Intelligent Key unit connector and ground with an oscilloscope.

Is the inspection result normal?

YES

>> Inside key antenna 2 (luggage compartment) is OK.

NO

>> GO TO 2.

2.

CHECK INSIDE KEY ANTENNA

1.

Disconnect Intelligent Key unit connector and inside key antenna 2 (luggage compartment) connectors.

2.

Check continuity between Intelligent Key unit harness connector (A) M164 terminals 33, 34 and inside key
antenna 2 (luggage compartment) harness connector (B) B129 terminals 1, 2.

3.

Check continuity between Intelligent Key unit harness connector
(A) M164 terminals 33, 34 and ground.

Test Item

Condition

Possible cause

INSIDE KEY ANTENNA 2

An excessive high or low voltage from inside 

antenna is sent to the Intelligent Key unit

•  Inside key antenna 2 (luggage compartment)
•  Between Intelligent Key unit and inside key antenna 2 

(luggage compartment)

Connector

Item

Terminals

Condition

Signal (V)

(Reference value)

(+)

(–)

M164

Intelligent 

Key unit

33

Ground

Ignition 
switch is 
pushed.

ALKIA0589ZZ

PIIB7441E

Intelligent Key 
unit connector

Terminals

Inside key antenna 

2 (luggage compart-

ment) connector

Terminals

Continuity

A: M164

33

B: B129

1

Yes

34

2

ALKIA0590ZZ

INSIDE KEY ANTENNA 2 (LUGGAGE COMPARTMENT)

DLK-43

< COMPONENT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

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Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace harness between Intelligent Key unit and inside key antenna 2 (luggage com-

partment).

3.

CHECK INSIDE KEY ANTENNA POWER SUPPLY SINGAL

1.

Replace inside key antenna. (New antenna or other antenna)

2.

Connect Intelligent Key unit connector.

3.

Check signal between Intelligent Key unit connector and ground
with oscilloscope.

Is the inspection result normal?

YES

>> Replace inside key antenna 2 (luggage compartment).

NO

>> Replace Intelligent Key unit. Refer to 

SEC-95, "Removal and Installation"

.

Item

Connector

Terminals

Continuity

Intelligent Key 

unit

A: M164

33

Ground

No

34

Connector

Item

Terminals

Condition

Signal (V)

(Reference value)

(+)

(–)

M164

Intelligent 

Key unit

33

Ground

Ignition 
switch is 
pushed.

ALKIA0589ZZ

PIIB7441E

DLK-44

< COMPONENT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

INSIDE KEY ANTENNA 3 (CENTER CONSOLE)

INSIDE KEY ANTENNA 3 (CENTER CONSOLE)

Description - Inside Key Antenna 3 (Center Console)

INFOID:0000000001563493

Detects whether Intelligent Key is inside the vehicle.

Component Function Check

INFOID:0000000001563494

1.

CHECK INSIDE KEY ANTENNA INPUT SIGNAL

With CONSULT-III

1.

Check “ANTENNA” in “Active Test” mode with CONSULT-III.

2.

Touch “INSIDE KEY ANTENNA 3”.

3.

When Intelligent Key is inside key antenna (center console) detection area, hazard lamps flash.

Is the inspection result normal?

YES

>> Inside key antenna 3 (center console) is OK.

NO

>> Refer to 

DLK-44, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000001563495

1.

CHECK INSIDE KEY ANTENNA POWER SUPPLY SIGNAL

1.

Turn ignition switch OFF.

2.

Check signal between Intelligent Key unit connector and ground with an oscilloscope.

Is the inspection result normal?

YES

>> Inside key antenna 3 (center console) is OK.

NO

>> GO TO 2.

2.

CHECK INSIDE KEY ANTENNA

1.

Disconnect Intelligent Key unit connector and inside key antenna 3 (center console) connectors.

2.

Check continuity between Intelligent Key unit harness connector (A) M164 terminals 13, 14 and inside key
antenna 3 (center console) harness connector (B) M212 terminals 1, 2.

3.

Check continuity between Intelligent Key unit harness connector
(A) M164 terminals 13, 14 and ground.

Test Item

Condition

Possible cause

INSIDE KEY ANTENNA 3

An excessive high or low voltage from inside 

antenna is sent to the Intelligent Key Unit

•  Inside key antenna 3 (center console)
•  Between Intelligent Key unit and inside key antenna 3 

(center console)

Connector

Item

Terminals

Condition

Signal (V)

(Reference value)

(+)

(–)

M164

Intelligent 

Key unit

13

Ground

Ignition 
switch is 
pushed.

ALKIA0583ZZ

PIIB7441E

Intelligent Key 
unit connector

Terminals

Inside key antenna 

3 (center console) 

connector

Terminals

Continuity

A: M164

13

B: M212

1

Yes

14

2

ALKIA0584ZZ