Infiniti M45 (Y34). Manual - part 235

 

  Index      Infiniti     Infiniti M45 (Y34) - service repair manual 2004 year

 

Search            copyright infringement  

 

 

 

 

 

 

 



 

 

Content   ..  233  234  235  236   ..

 

 

Infiniti M45 (Y34). Manual - part 235

 

 

ELECTRONIC KEY SYSTEM

BL-165

C

D

E

F

G

H

J

K

L

M

A

B

BL

Terminals and Reference Value for Steering Lock Control Unit

AIS0029I

Terminals and Reference Value for NATS IMMU

AIS0029J

TERMINAL 

WIRE 

COLOR

ITEM

CONDITION

VOLTAGE (V)

(Approx.)

1

Y/G

Battery power supply

Battery voltage

2

PU/W

Key switch

Key inserted (ON) 

 Key removed from 

IGN key cylinder (OFF)

Battery voltage 

 0

3

L

NATS IMMU

Key inserted

Just after inserting electronic key to 
key cylinder: Point of tester should 
move

4

B

Ground

0

TERMINAL 

WIRE 

COLOR

ITEM

CONDITION

VOLTAGE (V)

(Approx.)

1

W

Battery power supply

Battery voltage

2

PU/W

Key switch

Key inserted (ON) 

 Key removed from 

IGN key cylinder (OFF)

Battery voltage 

 0

3

W/B

Ignition switch

Ignition switch ON or START position

Battery voltage

5

R

NATS antenna amp.

key inserted (key switch OFF 

 ON)

 5 (for 3 seconds)

6

Y/PU

NATS antenna amp.

Key inserted (key switch OFF 

 ON)

Just after inserting electronic key to 
key cylinder: Point of tester should 
move

7

Y/G

NATS antenna amp.

Key inserted (key switch OFF 

 ON)

Just after inserting electronic key to 
key cylinder: Point of tester should 
move

8

B/R

NATS antenna amp.

0

9

B/W

Ground

0

10

L

Steering lock control unit

Key inserted

Just after inserting electronic key to 
key cylinder: Point of tester should 
move

11

G/W

ECM

15

G

Security indicator lamp

Goes OFF 

 illuminates (every 2.4 sec-

onds)

Battery voltage 

 0

BL-166

ELECTRONIC KEY SYSTEM

Work Flow

AIS0029K

PIIA2862E

ELECTRONIC KEY SYSTEM

BL-167

C

D

E

F

G

H

J

K

L

M

A

B

BL

Diagnostic System Diagram

AIS0029L

Symptom Chart 

AIS0029M

SYMPTOM 1: ELECTRONIC KEY DOES NOT TURN

*: If the ignition key cylinder cannot be turned by the emergency key, the ignition key cylinder is malfunctioning.

SYMPTOM 2: SECURITY INDICATOR DOES NOT FLASH

PIIA0378E

Symptom

Diagnostic Procedure

Possible malfunctioning 

part or status

Reference part in the 

trouble diagnostic 

system diagram

Reference 

page

Security indicator remains 
flashing with Electronic key 
inserted.

Diagnostic Procedure 1

Key switch

C5

BL-168

Security indicator turns OFF 
with Electronic key inserted.

Diagnostic Procedure 2

NATS IMMU

A

BL-169

Steering lock control unit

F

Harness system

C7

Ignition key cylinder*

Checking with the emergency 
key

Symptom

Diagnostic Procedure

Possible malfunctioning 

part or status

Reference part in the 

trouble diagnostic 

system diagram

Reference 

page

Security indicator does not turn 
ON.

Diagnostic Procedure 3

Security indicator

BL-170

Open circuit in the bat-
tery power supply line to 
the security indicator

NATS IMMU

A

Harness system

C6

BL-168

ELECTRONIC KEY SYSTEM

Diagnostic Procedure 1

AIS0029N

1. 

CHECK ELECTRONIC KEY INSERT SIGNAL

Check voltage between NATS IMMU connector M32 terminal 2 (PU/
W) and ground.

OK or NG

OK

>> Replace NATS IMMU.

NG

>> GO TO 2.

2. 

CHECK KEY SWITCH CIRCUIT

1.

Remove the key from the ignition key cylinder.

2.

Disconnect NATS IMMU and key switch and key lock solenoid (key switch) connector.

3.

Check continuity between NATS IMMU connector M32 terminal 2 (PU/W) and key switch and key lock
solenoid (key switch) connector M64 terminal 4 (PU/W).

OK or NG

OK

>> GO TO 3.

NG

>> Repair or replace harness.

3. 

CHECK KEY SWITCH

Check continuity between key switch terminals.

OK or NG

OK

>> Check the following.

10A fuse [No. 32, located in fuse block (J/B) No. 2]

Harness for open or short between key switch and
fuse

NG

>> Replace key switch.

Terminals

Condition

Voltage

2 (PU/W) 

 ground

Electronic key removed from 
ignition key cylinder

0V

Electronic key inserted in 
ignition key cylinder

Battery voltage

PIIA3124E

Continuity should exist.

PIIB0830E

Connector

Terminal

Condition of key switch

Continuity

M64

3 – 4

Key is inserted.

Yes

Key is removed.

No

PIIA3044E

 

 

 

 

 

 

 

Content   ..  233  234  235  236   ..