Nissan Pathfinder (2008 year). Manual - part 551

POWER SUPPLY AND GROUND CIRCUIT

SEC-41

< COMPONENT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

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POWER SUPPLY AND GROUND CIRCUIT

INTELLIGENT KEY UNIT

INTELLIGENT KEY UNIT : Diagnosis Procedure

INFOID:0000000001689560

Refer to 

DLK-46, "INTELLIGENT KEY UNIT : Diagnosis Procedure"

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BCM

BCM : Diagnosis Procedure

INFOID:0000000001689561

Refer to 

BCS-32, "Diagnosis Procedure"

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SEC-42

< COMPONENT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

KEY CYLINDER SWITCH

KEY CYLINDER SWITCH

Description

INFOID:0000000001728777

The main power window and door lock/unlock switch detects condition of the door key cylinder switch and
transmits to BCM as the LOCK or UNLOCK signal. 

Component Function Check

INFOID:0000000001728778

1.

CHECK DOOR KEY CYLINDER SWITCH INPUT SIGNAL

Check "KEY CYL LK-SW" AND "KEY CYL UN-SW" in DATA MONITOR mode for “POWER DOOR LOCK
SYSTEM” with CONSULT-III.

Is the inspection result normal?

YES

>> Key cylinder switch is OK.

NO

>> Refer to 

SEC-42, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000001728779

1.

CHECK DOOR KEY CYLINDER SWITCH LH

With CONSULT-III

Check front door lock assembly LH (key cylinder switch) ("KEY CYL LK-SW") and ("KEY CYL UN-SW) in
DATA MONITOR mode with CONSULT–III.
• When key inserted in left front key cylinder is turned to LOCK:

• When key inserted in left front key cylinder is turned to UNLOCK:

Without CONSULT-III

Check voltage between main power window and door lock/unlock
switch connector D7 terminals 4, 6 and ground.

Is the inspection result normal?

YES

>> Key cylinder switch signal is OK.

NO

>> GO TO 2.

2.

CHECK DOOR KEY CYLINDER SWITCH LH GROUND HARNESS

1.

Turn ignition switch OFF.

2.

Disconnect front door lock assembly LH (key cylinder switch).

Monitor item

Condition

KEY CYL LK-SW

Lock

: ON

Neutral / Unlock

: OFF

KEY CYL UN-SW

Unlock

: ON

Neutral / Lock

: OFF

KEY CYL LK-SW

: ON

KEY CYL UN-SW

: ON

Connector

Terminals

Condition of left front key cylinder

Voltage (V)

(Approx.)

(+)

(–)

D7

4

Ground

Neutral/Unlock

5

Lock

0

6

Neutral/Lock

5

Unlock

0

LIIA0566E

KEY CYLINDER SWITCH

SEC-43

< COMPONENT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

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3.

Check continuity between front door lock assembly LH (key cyl-
inder switch) connector (A) D14 terminal 4 and body ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace harness.

3.

CHECK DOOR KEY CYLINDER SWITCH LH

Check continuity between front door lock assembly LH (key cylinder
switch) terminals.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Replace front door lock assembly LH (key cylinder switch). Refer to 

DLK-190, "Removal and

Installation"

.

4.

CHECK DOOR KEY CYLINDER HARNESS

Check continuity between main power window and door lock/unlock
switch connector (A) D7 terminals 4, 6 and front door lock assembly
LH (key cylinder switch) connector (B) D14 terminals 3, 5 and body
ground. 

Is the inspection result normal?

YES

>> Replace main power window and door lock/unlock switch.

NO

>> Repair or replace harness.

Connector

Terminals

Continuity

D14

4 – Ground

Yes

ALKIA1186ZZ

Terminals

Condition

Continuity

3 – 4

Key is turned to LOCK or neutral.

No

Key is turned to UNLOCK.

Yes

4 – 5

Key is turned to UNLOCK or neutral.

No

Key is turned to LOCK.

Yes

ALKIA1183ZZ

Connector

Terminals

Connector

Terminals

Continuity

A: Main 

power win-

dow and 

door lock/

unlock 

switch

4

B: Front 

door lock 

assembly 

LH (key 
cylinder 

switch)

5

Yes

6

3

Yes

4, 6

Ground

No

ALKIA1184ZZ

SEC-44

< COMPONENT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

GLASS HATCH AJAR SWITCH

GLASS HATCH AJAR SWITCH

Diagnosis Procedure

INFOID:0000000001733165

1.

CHECK GLASS HATCH AJAR SWITCH INPUT SIGNAL

With CONSULT-III

Check glass hatch ajar switch ("TRNK OPN MNTR") in DATA MONITOR mode with CONSULT–III.
• When glass hatch is open:

• When glass hatch is closed:

Without CONSULT-III

Check voltage between BCM connector M19 terminal 42 and ground.

Is the inspection result normal?

YES

>> System is OK.

NO

>> GO TO 2

2.

CHECK GLASS HATCH AJAR SWITCH CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect BCM and glass hatch ajar switch.

3.

Check continuity between BCM connector M19 terminal 42 and glass hatch ajar switch connector D503
terminal 1 (+) .

4.

Check continuity between glass hatch ajar switch connector
D503 terminal 1 (+) and ground.

Is the inspection result normal?

YES

>> GO TO 3

NO

>> Repair or replace harness.

3.

CHECK GLASS HATCH AJAR SWITCH

Check continuity between glass hatch ajar switch connector terminal
1 and ground.

Is the inspection result normal?

YES

>> Check glass hatch ajar switch case ground condition.

NO

>> Replace glass hatch ajar switch.

TRNK OPN MNTR

: ON

TRNK OPN MNTR

: OFF

Connector

Item

Terminals

Condition

Voltage (V)

(Approx.)

(+)

(–)

M19

BCM

42

Ground

Open

↓

Closed

0

↓

Battery voltage

LIIA1149E

42 - 1 (+)

: Continuity should exist.

1 (+) - Ground

: Continuity should not exist.

LIIA1150E

Terminals

Condition

Continuity

Glass hatch ajar 

switch 

1 – Ground

Open

Yes

Closed

No

ALKIA0668ZZ

IGNITION KNOB SWITCH

SEC-45

< COMPONENT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

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IGNITION KNOB SWITCH

Ignition Knob Switch Check

INFOID:0000000001728780

1.

CHECK IGNITION KNOB SWITCH

 With CONSULT-III

Display “PUSH SW” on DATA MONITOR screen, and check if ON/OFF display is linked to ignition switch oper-
ation.

 Without CONSULT-III

1.

Turn ignition switch OFF.

2.

Disconnect Intelligent Key unit connector.

3.

Check voltage between Intelligent Key unit harness connector
M164 terminal 27 and ground.

Is the inspection result normal?

YES

>> Ignition knob switch is OK.

NO

>> GO TO 2.

2.

CHECK IGNITION KNOB SWITCH POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect key switch and ignition knob switch connector.

3.

Check voltage between key switch and ignition knob switch harness connector M66 terminal 1 and
ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace key switch and ignition knob switch

power supply circuit.

3.

CHECK IGNITION KNOB SWITCH OPERATION

Check continuity between key switch and ignition knob switch terminals 1 and 2.

Monitor item

Condition

PUSH SW

Ignition switch is pushed: ON

Ignition switch is released: OFF

Connector

Terminals

Condition

Voltage (V)

(Approx.)

(+)

(–)

M164

27

Ground

Ignition switch is 
pushed

Battery voltage

Ignition switch is re-
leased

0

WIIA1175E

1 - Ground

: Battery voltage

ALKIA1217ZZ

SEC-46

< COMPONENT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

IGNITION KNOB SWITCH

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Replace key switch and ignition knob switch.

4.

CHECK IGNITION KNOB SWITCH CIRCUIT

1.

Check continuity between Intelligent Key unit harness connector (A) M164 terminal 27 and key switch and
ignition knob switch harness connector (B) M66 terminal 2.

2.

Check continuity between Intelligent Key unit harness connector
M164 terminal 27 and ground.

Is the inspection result normal?

YES

>> Check the condition of harness and harness connector.

NO

>> Repair or replace harness between Intelligent Key unit

and key switch and ignition knob switch.

Component

Terminals

Condition

Continuity

Ignition 

knob switch

1

2

Ignition switch is pushed

Yes

Ignition switch is released

No

ALKIA1218ZZ

27 - 2

: Continuity should exist.

27 - Ground

: Continuity should not exist.

ALKIA1219ZZ

HORN FUNCTION

SEC-47

< COMPONENT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

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HORN FUNCTION

Symptom Table

INFOID:0000000001689566

HAZARD AND HORN REMINDER FUNCTION MALFUNCTION

NOTE:
• Before performing the diagnosis in the following table, check “Work flow”. Refer to 

SEC-5, "Work Flow"

.

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

in this order.

Conditions of Vehicle (Operating Conditions)

• “ANSWER BACK FUNCTION” is ON when setting on CONSULT-III.
• Ignition switch is in OFF position.
• All doors are closed.

Symptom

Diagnosis/service procedure

Reference 

page

Hazard reminder does not operate by request switch.
(Horn reminder operate.)

1.

Check “HAZARD ANSWER BACK” setting in “WORK 
SUPPORT”.

SEC-20

2.

Check hazard function.

EXL-4

3.

Check Intermittent Incident.

GI-51

Hazard reminder does not operate by Intelligent Key.
(Horn reminder operate.)

1.

Check “HAZARD ANSWER BACK” setting in “WORK 
SUPPORT”.

SEC-20

2.

Check hazard function.

EXL-4

3.

Check Intelligent Key battery inspection.

DLK-87

Horn reminder does not operate by request switch.
(Hazard reminder operate.)

1.

Check “ANSWER BACK WITH I-KEY LOCK” or “AN-
SWER BACK WITH I-KEY UNLOCK” setting in “WORK 
SUPPORT”.

SEC-20

2.

Check Intelligent Key warning buzzer.

DLK-73

3.

Check Intermittent Incident.

GI-51

Horn reminder does not operate by Intelligent Key.
(Hazard reminder operate.)

1.

Check “HORN WITH KEYLESS LOCK” setting in 
“WORK SUPPORT”.

SEC-20

2.

Check horn function.

HRN-3

3.

Check Intermittent Incident.

GI-51

SEC-48

< COMPONENT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

VEHICLE SECURITY INDICATOR

VEHICLE SECURITY INDICATOR

Description

INFOID:0000000001689567

• Vehicle security indicator is built in combination meter.
• NATS (Nissan Anti-Theft System) and vehicle security system conditions are indicated by blink or illumina-

tion of vehicle security indicator.

Component Function Check

INFOID:0000000001689568

1.

CHECK FUNCTION

1.

Perform “THEFT IND” in the “Active Test” mode with CONSULT-III.

2.

Check vehicle security indicator operation.

Is the inspection result normal?

YES

>> INSPECTION END.

NO

>> Refer to 

SEC-48, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000001689569

1.

SECURITY INDICATOR LAMP ACTIVE TEST

With CONSULT-III

Check "THEFT IND” in "ACTIVE TEST" mode with CONSULT-III.

Without CONSULT-III

1.

Disconnect BCM.

2.

Check voltage between BCM harness connector M18 terminal
23 and ground.

Is the inspection result normal?

YES

>> Security indicator lamp is OK.

NO

>> GO TO 2

2.

SECURITY INDICATOR LAMP CHECK

Check security indicator lamp condition.
Is the inspection result normal?

YES

>> GO TO 3

NO

>> Replace security indicator lamp.

3.

CHECK HARNESS CONTINUITY

1.

Turn ignition switch OFF.

2.

Disconnect BCM and security indicator lamp connector.

Test item

Description

THEFT IND

ON

Vehicle security indicator

ON

OFF

OFF

Connector

Terminals

Condition

Voltage (V)

(Approx.)

(+)

(-)

M18

23

Ground

ON

0

OFF

Battery voltage

LIIA0523E