Infiniti Q45. Manual — part 231

ELECTRONIC KEY SYSTEM

BL-193

C

D

E

F

G

H

J

K

L

M

A

B

BL

Terminals and Reference Value for Steering Lock Control Unit

NIS000X9

Terminals and Reference Value for NATS IMMU

NIS000XA

TERMI-

NAL

WIRE

COLOR

ITEM

Signal

input/

output

CONDITION

VOLTAGE (V)

(Approx.)

1

Y/G

Power source
(Fuse)

Input

—

Battery voltage

2

PU/W

Key switch

Input

Key inserted (ON)

→

Key removed

from IGN key cylinder (OFF)

Battery voltage

→

0

3

L

NATS IMMU

Input

Key inserted (key switch OFF

→

ON)

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

4

B

Ground

—

—

0

TERMI-

NAL

WIRE

COLOR

ITEM

Signal

input/

output

CONDITION

VOLTAGE (V)

(Approx.)

1

W

Power source
(Fuse)

Input

—

Battery voltage

2

PU/W

Key switch

Input

Key inserted (ON)

→

Key removed

from IGN key cylinder (OFF)

Battery voltage

→

0

3

W/B

Ignition switch (ON)

Input

Ignition switch (ON or START posi-
tion)

Battery voltage

5

R

NATS antenna amp.

Output

key inserted (key switch OFF

→

ON)

0

→

5 (for 3 seconds)

6

Y

NATS antenna amp.

Input/

output

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.

Input

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

Ground

—

—

0

10

L

Steering lock control
unit

Input

Key inserted (key switch OFF

→

ON)

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

11

G/W

ECM

Output

—

—

15

G

Security indicator
lamp

Output

Goes OFF

→

illuminates (every 2.4

seconds)

Battery voltage

→

0

BL-194

ELECTRONIC KEY SYSTEM

Work Flow

NIS000XB

PIIB2132E

ELECTRONIC KEY SYSTEM

BL-195

C

D

E

F

G

H

J

K

L

M

A

B

BL

Diagnostic System Diagram

NIS000XC

Symptom Chart

NIS000XD

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-196

Security indicator turns OFF
with Electronic key inserted.

Diagnostic Procedure 2

NATS IMMU

A

BL-197

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-198

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

—

NATS IMMU

A

Harness system

C6

BL-196

ELECTRONIC KEY SYSTEM

Diagnostic Procedure 1

NIS000XE

1.

CHECK ELECTRONIC KEY INSERT SIGNAL

Check voltage between NATS IMMU connector 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 and key switch and key lock solenoid
(key switch) connector M64 terminal 4.

OK or NG

OK

>> GO TO 3.

NG

>> Repair or replace harness.

3.

CHECK KEY SWITCH

Check continuity between key switch terminals 3and 4.

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.

Connector

Terminals

(Wire color)

Condition

Voltage (V)

(Approx.)

(+)

(–)

M32

2 (PU/W)

Ground

Electronic key
removed from ignition
key cylinder

0

Electronic key
inserted in ignition cyl-
inder

Battery voltage

PIIA3124E

2 (PU/W) – 4 (PU/W)

: Continuity should exist.

PIIB1978E

Terminal

Condition of key switch

Continuity

3 4

Key is inserted.

Yes

Key is removed.

No

PIIA3044E