Nissan Pathfinder (2009 year). Manual - part 170

INTELLIGENT KEY UNIT

DLK-169

< ECU DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

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ABKIA0385GB

2009 Pathfinder

DLK-170

< ECU DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

INTELLIGENT KEY UNIT

Fail Safe

INFOID:0000000003938258

Fail-safe operation

The Intelligent Key system operation will be interrupted if the Intelligent Key unit loses power or communica-
tion with the BCM.

ABKIA0386GB

2009 Pathfinder

INTELLIGENT KEY SYSTEM SYMPTOMS

DLK-171

< SYMPTOM DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

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SYMPTOM DIAGNOSIS

INTELLIGENT KEY SYSTEM SYMPTOMS

Symptom Table

INFOID:0000000003938262

ALL FUNCTIONS OF INTELLIGENT KEY SYSTEM DO NOT OPERATE

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

DLK-7, "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)

• “ENGINE START BY I-KEY” and “LOCK/UNLOCK BY I-KEY” are ON when setting on CONSULT-III.
• All doors are closed.

Symptom

Diagnosis/service procedure

Reference page

All doors and ignition switch do not respond to 
Intelligent Key comand.

1.

Check Intelligent Key function and battery inspection.

DLK-102

2.

Check Intelligent Key unit power supply and ground circuit.

DLK-55

3.

Check remote keyless entry receiver.

DLK-99

4.

Check BCM power supply and ground circuit.

DLK-55

5.

Replace Intelligent Key unit.

DLK-102

2009 Pathfinder

DLK-172

< SYMPTOM DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

DOOR LOCK FUNCTION SYMPTOMS

DOOR LOCK FUNCTION SYMPTOMS

DOOR LOCK AND UNLOCK SWITCH

DOOR LOCK AND UNLOCK SWITCH : Symptom Table

INFOID:0000000003938263

DOOR LOCK/UNLOCK FUNCTION MALFUNCTION

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

DLK-7, "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)

• “LOCK/UNLOCK BY I-KEY” is ON when setting on CONSULT-III.
• Ignition switch is not depressed.
• All doors are closed.

Symptom

Diagnosis/service procedure

Reference page

Power door lock does not operate with door lock 
and unlock switch.

1.

Check BCM Power supply and ground circuit.

BCS-35

2.

Check door lock and unlock switch.

DLK-62

3.

Check door lock actuator (driver side)

DLK-77

4.

Check Intermittent Incident.

GI-49

Power door lock does not operate with door key 
cylinder operation.
(Power door lock operate properly with door lock 
and unlock switch.)

1.

Check key cylinder switch.

DLK-68

2.

Replace power window main switch.

PWC-94

Specific door lock actuator does not operate.

1a.

Check driver side door lock actuator.

DLK-77

1b.

Check passenger side door lock actuator.

DLK-78

1c.

Check rear LH side door lock actuator.

DLK-79

1d.

Check rear RH side door lock actuator.

DLK-81

1e.

Check back door lock actuator.

DLK-82

1f.

Check glass hatch lock actuator.

DLK-84

2.

Check Intermittent Incident.

GI-49

Back door does not operate using back door open-
er switch (door locks are open).

1.

Check back door opener switch.

DLK-66

2.

Check back door lock actuator.

DLK-82

Glass hatch does not open using glass hatch ajar 
switch (door locks are open).

1.

Check glass hatch ajar switch.

DLK-60

2.

Check glass hatch lock actuator.

DLK-84

Door lock/unlock do not operate by request switch.

1.

Door switch check.

DLK-57

2.

Ignition knob switch check.

DLK-112

3.

Replace Intelligent Key unit.

SEC-119

Door lock/unlock does not operate by request 
switch (LH side).

1.

Front door request switch LH check.

DLK-72

2.

Front outside antenna LH check.

DLK-93

3.

Replace Intelligent Key unit.

SEC-119

Door lock/unlock does not operate by request 
switch (RH side).

1.

Front door request switch RH check.

DLK-72

2.

Front outside antenna RH check.

DLK-93

3.

Replace Intelligent Key unit.

SEC-119

Door lock/unlock does not operate by request 
switch (back door).

1.

Back door request switch check.

DLK-74

2.

Rear bumper antenna check.

DLK-93

3.

Replace Intelligent Key unit.

SEC-119

2009 Pathfinder

DOOR LOCK FUNCTION SYMPTOMS

DLK-173

< SYMPTOM DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

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INTELLIGENT KEY

INTELLIGENT KEY : Symptom Table

INFOID:0000000003938264

REMOTE KEYLESS ENTRY FUNCTION MALFUNCTION

NOTE:
• Before performing the diagnosis in the following table, check “Trouble Diagnosis Procedure”. Refer to 

DLK-

7, "Work Flow"

.

• Make sure 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)

• Ignition switch is not depressed.
• All doors are closed.

Rear, back door and glass hatch lock actuators do 
not operate.

1.

Passenger select unlock relay check.

DLK-86

2.

Check Intermittent Incident.

GI-49

Selective unlock function does not operate by front 
door request switch LH (other door lock functions 
operate properly).

1.

Check “SELECT UNLOCK FUNCTION” setting in “WORK 
SUPPORT”.

DLK-41

2.

Replace Intelligent Key unit.

SEC-119

Auto lock function does not operate properly.

1.

Check “AUTO RELOCK TIMER” setting in “WORK SUP-
PORT”.

DLK-41

2.

Key switch check (BCM).

DLK-111

3.

Ignition knob switch check.

DLK-112

4.

Door switch check.

DLK-57

5.

Check glass hatch ajar switch.

DLK-60

6.

Replace Intelligent Key unit.

SEC-119

Key reminder function does not operate properly.

1.

Check “ANTI KEY LOCK IN FUNCTION” setting in 
“WORK SUPPORT”.

DLK-41

2.

Door switch check.

DLK-57

3.

Check glass hatch ajar switch.

DLK-60

4a.

Inside key antenna 1 (instrument panel) check.

DLK-49

4b.

Inside key antenna 2 (center console) check.

DLK-51

4c.

Inside key antenna 3 (3rd row seat)  check.

DLK-53

5.

Front door lock actuator LH (door unlock sensor) check.

DLK-70

6.

Intelligent Key battery and function inspection.

DLK-102

7.

Replace Intelligent Key unit.

SEC-119

Vehicle speed sensing auto LOCK operation does 
not operate.

1.

Ensure automatic door lock/unlock function (lock opera-
tion) is enabled.

DLK-41

2.

Check combination meter vehicle speed signal.

MWI-28

3.

Check intermittent incident.

GI-49

Ignition OFF interlock door UNLOCK function does 
not operate.

1.

Ensure automatic door lock/unlock function (unlock oper-
ation) is enabled.

DLK-41

2.

Check BCM for DTCs.

DLK-145

3.

Check intermittent incident.

GI-49

Symptom

Diagnosis/service procedure

Reference page

2009 Pathfinder

DLK-174

< SYMPTOM DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

DOOR LOCK FUNCTION SYMPTOMS

KEY WARNING LAMP (GREEN) ILLUMINATES

NOTE:
• Before performing the diagnosis in the following table, check “Trouble Diagnosis Procedure”. Refer to 

DLK-

7, "Work Flow"

.

• Make sure 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 “Diagnoses/service procedure” col-

umn in this order.

Conditions of Vehicle (Operating Conditions)

• Intelligent Key is registered.
• Key is not inserted in ignition switch.
• One or more registered Intelligent Keys are in the vehicle.

Symptom

Diagnosis/service procedure

Reference 

page

All of the remote keyless entry functions do not op-
erate.

1.

Intelligent Key battery and function inspection.

DLK-102

2.

Remote Keyless Entry function check.

DLK-99

3.

Replace Intelligent Key unit.

SEC-119

Selective unlock function does not operate by Intel-
ligent Key remote control button.

1.

Check “SELECT UNLOCK FUNCTION” setting in “WORK 
SUPPORT”.

DLK-41

2.

Intelligent Key battery inspection.

DLK-102

3.

Replace Intelligent Key unit.

SEC-119

Auto lock function does not operate properly.

1.

Check “AUTO RELOCK TIMER” setting in “WORK SUPPORT”.

DLK-41

2.

Key switch check (BCM).

DLK-111

3.

Glass hatch ajar switch check.

DLK-60

4.

Ignition knob switch check.

DLK-112

5.

Door switch check.

DLK-57

6.

Replace Intelligent Key unit.

SEC-119

Key reminder function does not operate properly.

1.

Check “ANTI KEY LOCK IN FUNCTION” setting in “WORK 
SUPPORT”.

DLK-41

2.

Door switch check.

DLK-57

3.

Glass hatch ajar switch check.

DLK-60

4a.

Inside key antenna 1 (instrument panel) check.

DLK-49

4b.

Inside key antenna 2 (center console) check.

DLK-51

4c.

Inside key antenna 3 (3rd row seat) check.

DLK-53

5.

Front door lock actuator LH (door unlock sensor) check.

DLK-70

6.

Intelligent Key battery inspection.

DLK-102

7.

Replace Intelligent Key unit.

SEC-119

Panic alarm function does not operate properly.

1.

Check “PANIC ALARM DELAY” setting in “WORK SUPPORT”.

DLK-41

2.

Theft warning operation check.

SEC-17

3.

Intelligent Key battery inspection.

DLK-102

4.

Key switch check (BCM).

DLK-111

5.

Ignition knob switch check.

DLK-112

6.

Replace Intelligent Key unit.

SEC-119

Power window down function does not operate.

1.

Check “PW DOWN SET” setting in “WORK SUPPORT”.

DLK-41

2.

Intelligent Key battery inspection.

DLK-102

2009 Pathfinder

DOOR LOCK FUNCTION SYMPTOMS

DLK-175

< SYMPTOM DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

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KEY WARNING LAMP (RED) ILLUMINATES

NOTE:
• Before performing the diagnosis in the following table, check “Trouble Diagnosis Procedure”. Refer to 

DLK-

7, "Work Flow"

.

• Make sure 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 “Diagnoses/service procedure” col-

umn in this order.

Conditions of Vehicle (Operating Conditions)

• Intelligent Key is registered.
• Key is not inserted in ignition switch.
• One or more registered Intelligent Keys are in the vehicle.

KEY WARNING LAMP DOES NOT ILLUMINATE

NOTE:
• Before performing the diagnosis in the following table, check “Trouble Diagnosis Procedure”. Refer to 

DLK-

7, "Work Flow"

.

• Make sure 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 “Diagnoses/service procedure” col-

umn in this order.

• Check if ignition switch turns using mechanical key. If it turns, check if “ENGINE START BY I-KEY” in

“WORK SUPPORT” mode is ON.

Conditions of Vehicle (Operating Conditions)

• Intelligent Key is registered.
• Key is not inserted in ignition switch.
• One or more registered Intelligent Keys are in the vehicle.

Symptom

Diagnosis/service procedure

Reference page

Ignition switch does not turn ON with Intelligent Key. 
[KEY warning lamp (green) illuminates].

1. Steering lock solenoid check.

DLK-95

2. Replace Intelligent Key unit.

SEC-119

Symptom

Diagnosis/service procedure

Reference page

Ignition switch does not turn ON with Intelligent 
Key. [KEY warning lamp (red) illuminates].

1a. Inside key antenna 1 (instrument panel) check.

DLK-49

1b. Inside key antenna 2 (center console) check.

DLK-51

1c. Inside key antenna 3 (3rd row seat) check.

DLK-53

2. Replace Intelligent Key unit.

SEC-119

Symptom

Diagnosis/service procedure

Reference page

Ignition switch does not turn ON with Intelligent 
Key. [KEY warning lamp does not illuminate].

1.

Intelligent Key unit power supply and ground circuit check.

DLK-55

2.

Ignition knob switch check.

DLK-112

3.

Key switch check.

DLK-109

4.

Replace Intelligent Key unit.

SEC-119

2009 Pathfinder

DLK-176

< SYMPTOM DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

WARNING FUNCTION SYMPTOMS

WARNING FUNCTION SYMPTOMS

Symptom Table

INFOID:0000000003938266

WARNING FUNCTION MALFUNCTION

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

DLK-7, "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)
Warning chime functions operating condition is extremely complicated, during operating confirmations, recon-
firm the list above twice in order to ensure proper operation.

Symptom

Diagnosis/service procedure

Reference 

page

OFF position warn-
ing does not oper-
ate.

For internal

1.

Check ignition knob switch.

DLK-112

2.

Check door switch.

DLK-57

3.

Check warning chime function.

DLK-107

4.

Check Intermittent Incident.

GI-49

For external

1.

Check ignition knob switch.

DLK-112

2.

Check door switch.

DLK-57

3.

Check Intelligent Key warning buzzer.

DLK-88

4.

Check Intermittent Incident.

GI-49

P position warning does not operate.

1.

Check Park position switch.

DLK-97

2.

Check door switch.

DLK-57

3.

Check Intelligent Key warning buzzer.

DLK-88

4.

Check warning chime function.

DLK-107

5.

Check combination meter display function.

DLK-106

6.

Check Intermittent Incident. 

GI-49

ACC warning does not operate

1.

Check ignition knob switch.

DLK-112

2.

Check warning chime function.

DLK-107

3.

Check combination meter display function.

DLK-106

4.

Check Intermittent Incident.

GI-49

2009 Pathfinder