Infiniti G37 Coupe. Manual - part 989

PCS

POWER DISTRIBUTION SYSTEM

PCS-125

< SYMPTOM DIAGNOSIS >

[POWER DISTRIBUTION SYSTEM]

C

D

E

F

G

H

I

J

K

L

B

A

O

P

N

SYMPTOM DIAGNOSIS

POWER DISTRIBUTION SYSTEM

Symptom Table

INFOID:0000000001728268

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 following table 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 following table.
Use the chart below to help you find the cause of the symptom. The numbers indicate the order of the inspec-
tion.
NOTE:
Before starting vehicle security system operation check, the following condition are met.
• Open front windows
• Turn ignition switch OFF
• Pull out lntelligent Key from key slot.

NO.

Function

Operation condition

Symptom

Diagnostic Item

Reference 

page

1

INTELLIGENT 
KEY SYSTEM/ 
DOOR LOCK 
FUNCTION

Lock/unlock door with door re-
quest switch. 
(Intelligent Key is into the out-
side key antenna detection ar-
ea)

Door does not lock/unlock

—

DLK-158

2

POWER DIS-
TRIBUTION 
FUNCTION

Press push-button ignition 
switch under the following con-
dition.

A/T models

• A/T selector lever position is 

in P or N position

• Do not depress brake pedal

M/T models

• Do not depress clutch pedal

Push-button ignition switch is 
not operated

—

PCS-127

3

INTELLIGENT 
KEY SYSTEM/ 
ENGINE START 
FUNCTION

Start engine with Intelligent Key 
into the vehicle (inside key an-
tenna detection area)

Engine can not start with Intel-

ligent Key

—

SEC-217

4

Open the door after ignition 
switch turn NO to OFF.

Steering is not locked

—

SEC-218

5

INFINITI VEHI-
CLE IMMOBI-
LIZEER 
SYSTEM-NATS 
FUNCTION

Start engine with Intelligent Key 
into the key slot.

Engine can not start (Intelli-

gent Key into the key slot)

—

SEC-219

6

Insert Intelligent Key into the 
keyslot.

Keyslot indicator is not illumi-

nate

—

SEC-224

PCS-126

< SYMPTOM DIAGNOSIS >

[POWER DISTRIBUTION SYSTEM]

POWER DISTRIBUTION SYSTEM

7

VEHICLE SE-
CURITY SYS-
TEM

Lock all doors with Intelligent 
Key or door request switch

Vehicle security system can 

not be set

—

SEC-221

Lock all doors with Intelligent 
Key or door request switch

Security indicator does not 

turn ON

—

PCS-128

In the armed phase, open the 
door

Vehicle security alarm does 

not activate

Horn

SEC-222

Head lamp

When alarm sound, press Intel-
ligent Key button

Vehicle security system can 

not be canceled

—

SEC-223

When alarm sound, press door 
request switch

—

SEC-223

8

POWER DIS-
TRIBUTION 
FUNCTION

Press push-button ignition 
switch under the following con-
dition.

A/T models

• A/T selector lever position is 

in P or N position

• Do not depress brake pedal

M/T models

• Do not depress clutch pedal

Push-button ignition switch 
position indicator does not 
turn on 

—

PCS-128

NO.

Function

Operation condition

Symptom

Diagnostic Item

Reference 

page

PCS

PUSH-BUTTON IGNITION SWITCH DOES NOT OPERATE

PCS-127

< SYMPTOM DIAGNOSIS >

[POWER DISTRIBUTION SYSTEM]

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PUSH-BUTTON IGNITION SWITCH DOES NOT OPERATE

Description

INFOID:0000000001728271

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

PCS-36, "Work Flow"

.

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

check each symptom.

Conditions of Vehicle (Operating Conditions)

• “ENGINE START BY I-KEY” in “WORK SUPPORT” is ON when setting on CONSULT-III.
• Intelligent Key is not inserted in key slot.
• One or more of Intelligent Keys with registered Intelligent Key ID is in the vehicle.

Diagnosis Procedure

INFOID:0000000001728272

1.

CHECK PUSH-BUTTON IGNITION SWITCH

Check push-button ignition switch.
Refer to 

PCS-71, "Component Function Check"

.

Is the inspection normal?

YES

>> GO TO 2.

NO

>> Repair or replace malfunctioning parts.

2.

CONFIRM THE OPERATION

Confirm the operation again.

Is the inspection normal?

YES

>> Check intermittent incident. Refer to 

GI-38, "Intermittent Incident"

.

NO

>> GO TO 1.

PCS-128

< SYMPTOM DIAGNOSIS >

[POWER DISTRIBUTION SYSTEM]

PUSH-BUTTON IGNITION SWITCH POSITION INDICATOR

PUSH-BUTTON IGNITION SWITCH POSITION INDICATOR

Description

INFOID:0000000001728269

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

PCS-36, "Work Flow"

.

Diagnosis Procedure

INFOID:0000000001728270

1.

CHECK PUSH-BUTTON IGNITION SWITCH INDICATOR

Check push-button ignition switch indicator.
Refer to 

PCS-73, "Component Function Check"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace the malfunctioning parts.

2.

CONFIRM THE OPERATION

Confirm the operation again.

Is the result normal?

YES

>> Check intermittent incident. Refer to 

GI-38, "Intermittent Incident"

.

NO

>> GO TO 1.