Infiniti Q45. Manual - part 235

IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-NATS)

BL-209

C

D

E

F

G

H

J

K

L

M

A

B

BL

Symptom Chart 1

NIS000XQ

 *: When IVIS (NATS) detects trouble, the security indicator lights up while electronic key is in the “ON” position.

SYMPTOM

Displayed “SELF-

DIAG RESULTS” on 

CONSULT-II screen.

DIAGNOSTIC PRO-

CEDURE

SYSTEM (Malfunctioning 

part or mode)

REFERENCE PART NO. 

OF ILLUSTRATION

●

Security indicator 
lighting up*

●

Engine hard to start

ECM INT CIRC-IMMU

[P1613]

Refer to 

BL-210, 

"Diagnostic Proce-

dure 1"

 .

ECM

B

CHAIN OF ECM-

IMMU

[P1612]

Refer to 

BL-211, 

"Diagnostic Proce-

dure 2"

 .

Open circuit in battery 
voltage line of NATS 
IMMU circuit

C1

Open circuit in ignition line 
of NATS IMMU circuit

C2

Open circuit in ground line 
of NATS IMMU circuit

C3

Open or short circuit 
between NATS IMMU and 
ECM communication line.

C4

ECM

B

NATS IMMU

A

DIFFERENCE OF 

KEY

[P1615]

Refer to 

BL-213, 

"Diagnostic Proce-

dure 3"

 .

Unregistered key

D

NATS IMMU

A

CHAIN OF IMMU-KEY
[P1614]

Refer to 

BL-215, 

"Diagnostic Proce-
dure 6"

 .

Open or short circuit 
between NATS IMMU and 
NATS antenna amp.

E1 - E4

Malfunction of key ID chip

D

NATS IMMU

A

Antenna amp.

E

ID DISCORD, IMM-

ECM

[P1611]

Refer to 

BL-213, 

"Diagnostic Proce-

dure 4"

System initialization has 
not yet been completed.

F

ECM

B

LOCK MODE

[P1610]

Refer to 

BL-214, 

"Diagnostic Proce-

dure 5"

 .

LOCK MODE

When the starting operation 

is carried out 5 or more 

times consecutively under 

the following conditions, 
IVIS(NATS) will shift the 

mode to prevent the engine 

start.

●

unregistered electronic 

key is used

●

NATS IMMU or ECM 

malfunctioning

●

MIL staying ON

●

Security indicator 
lighting up*

DON'T ERASE 
BEFORE CHECKING 
ENG DIAG

Refer to 

BL-208, 

"Work Flow"

 .

Engine trouble data and 
IVIS (NATS) trouble data 
have been detected in 
ECM

—

BL-210

IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-NATS)

Symptom Chart 2

NIS000XR

*: CONSULT-II self-diagnostic results display screen “no malfunction is detected”.

Diagnostic System Diagram

NIS000XS

Diagnostic Procedure 1

NIS000XT

Self-diagnostic results:
“ECM INT CIRC-IMMU” displayed on CONSULT-II screen

1. 

CONFIRM SELF-DIAGNOSTIC RESULTS

Confirm SELF-DIAGNOSTIC RESULTS “ECM INT CIRC-IMMU” dis-
played on CONSULT-II screen.

Is CONSULT-II screen displayed as above?

Yes

>> ECM is malfunctioning.

●

Replace ECM. Ref. part No. B

●

Perform initialization or re-communicating function.

–

For initialization, refer to “CONSULT-II Operation
Manual NATS-IVIS/NVIS”.

–

For re-communicating function, refer to 

BL-202, "ECM

Re-Communicating Function"

 .

No

>> GO TO 

BL-209, "Symptom Chart 1"

 .

SYMPTOM

SYSTEM

(Malfunctioning part or mode)

Security indicator does not light up*

Security indicator

Open circuit between Fuse and NATS IMMU

Continuation of initialization mode

NATS IMMU

PIIA0378E

SEL314W

IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-NATS)

BL-211

C

D

E

F

G

H

J

K

L

M

A

B

BL

Diagnostic Procedure 2

NIS000XU

Self-diagnostic results:
“CHAIN OF ECM-IMMU” display on CONSULT-II screen

1. 

CONFIRM SELF-DIAGNOSTIC RESULTS

Confirm SELF-DIAGNOSTIC RESULTS “CHAIN OF ECM-IMMU”
displayed on the screen?

NOTE:
In rare case, “CHAIN OF ECM-IMMU” might be stored during key
registration procedure, even if the system is not malfunctioning.
Is CONSULT-II screen displayed as above?

Yes

>> GO TO 2.

No

>> GO TO 

BL-209, "Symptom Chart 1"

 .

2. 

CHECK POWER SUPPLY CIRCUIT FOR NATS IMMU

1.

Turn ignition switch OFF.

2.

Disconnect NATS IMMU connector M32.

3.

Check voltage between NATS IMMU connector M32 terminal 1
and ground.

OK or NG

OK

>> GO TO 3. 

NG

>> Check the following.

●

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

●

Harness for open or short between fuse and NATS
IMMU. Ref. part No. C1.

3. 

CHECK IGNITION SWITCH ON SIGNAL

1.

Turn ignition switch ON.

2.

Check voltage between NATS IMMU connector M32 terminal 3
and ground.

OK or NG

OK

>> GO TO 4. 

NG

>> Check the following.

●

10A fuse [No.1, located in fuse block (J/B) No.1]

●

Harness for open or short between fuse and NATS
IMMU. Ref. part No. C2.

PIIA1260E

1 (W) – Ground

: Battery voltage.

PIIA3122E

3 (W/B) – Ground

: Battery voltage.

PIIA3140E

BL-212

IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-NATS)

4. 

CHECK GROUND CIRCUIT FOR NATS IMMU

1.

Turn ignition switch OFF.

2.

Check continuity between NATS IMMU connector M32 terminal 9 and ground.

OK or NG

OK

>> GO TO 5.

NG

>> Repair or replace harness. Ref. part No. C3.

5. 

CHECK COMMUNICATION LINE CIRCUIT

1.

Disconnect ECM connector.

2.

Check continuity between NATS IMMU connector M32 terminal
11 and ECM connector F101 terminal 88.

3.

Check continuity between NATS IMMU connector M32 terminal
11 and ground.

OK or NG

OK

>> GO TO 6 

NG

>> Repair or replace harness.

6. 

REPLACE NATS IMMU

1.

Replace NATS IMMU Ref. part No. A

2.

Perform initialization with CONSULT-II.
For initialization, refer to “CONSULT-II Operation Manual NATS-IVIS/NVIS”.

Does the engine start?

Yes

>> NATS IMMU is malfunctioning.

No

>> ECM is malfunctioning.

●

Replace ECM. Ref. part No. B

●

Perform initialization or re-communicating function.

–

For initialization, refer to “CONSULT-II Operation Manual NATS-IVIS/NVIS”.

–

For re-communicating function, refer to 

BL-202, "ECM Re-Communicating Function"

 .

9 (B) – Ground

: Continuity should exist.

PIIA3123E

11 (G/W) – 88 (G/W)

: Continuity should exist.

11 (G/W) – Ground

: Continuity should not exist.

PIIB1979E