Infiniti F50. Manual - part 240

IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-NATS)

BL-207

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HOW TO READ SELF-DIAGNOSTIC RESULTS

NATS SELF-DIAGNOSTIC RESULT ITEM CHART

PIIA1124E

Detected items (Screen terms)

P No.Code

(Self-diagnostic 

result of 

“ENGINE”)

Description

Diagnostic procedure 

ECM INT CIRC-IMMU

P1613

The malfunction of ECM internal circuit 
to NATS IMMU communication line is 
detected.

Refer to 

BL-210, "Diagnostic 

Procedure 1"

 .

CHAIN OF ECM-IMMU

P1612

Communication impossible between 
ECM and NATS IMMU.

Refer to 

BL-211, "Diagnostic 

Procedure 2"

 .

DIFFERENCE OF KEY

P1615

NATS IMMU can receive the key ID sig-
nal but the result of ID verification 
between key ID and NATS IMMU is NG.

Refer to 

BL-213, "Diagnostic 

Procedure 3"

 .

CHAIN OF IMMU-KEY

P1614

NATS IMMU cannot receive the key ID 
signal.

Refer to 

BL-215, "Diagnostic 

Procedure 6"

 .

ID DISCORD, IMM-ECM

P1611

The result of ID verification between 
NATS IMMU and ECM is NG. System ini-
tialization is required.

Refer to 

BL-213, "Diagnostic 

Procedure 4"

 .

LOCK MODE

P1610

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

Refer to 

BL-214, "Diagnostic 

Procedure 5"

 .

DON'T ERASE BEFORE 
CHECKING ENG DIAG

—

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

Refer to 

BL-208, "Work Flow"

 .

BL-208

IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-NATS)

Work Flow

EIS0012E

PIIA0379E

IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-NATS)

BL-209

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Symptom Chart 1

EIS0028Z

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

SYMPTOM

Displayed “SELF-DIAG 

RESULTS” on CON-

SULT-II screen.

DIAGNOSTIC PROCE-

DURE

SYSTEM (Malfunction-

ing 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, "Diag-

nostic Procedure 1"

 .

ECM

B

CHAIN OF ECM-IMMU

[P1612]

Refer to 

BL-211, "Diag-

nostic Procedure 2"

 .

Open circuit in battery 
voltage line of NATS 
IMMU circuit

C1

Open circuit in ignition 
line of NATS IMMU cir-
cuit

C2

Open circuit in ground 
line of NATS IMMU cir-
cuit

C3

Open or short circuit 
between NATS IMMU 
and ECM communica-
tion line.

C4

ECM

B

NATS IMMU

A

DIFFERENCE OF KEY

[P1615]

Refer to 

BL-213, "Diag-

nostic Procedure 3"

 .

Unregistered key

D

NATS IMMU

A

CHAIN OF IMMU-KEY
[P1614]

Refer to 

BL-215, "Diag-

nostic Procedure 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, "Diag-

nostic Procedure 4"

System initialization has 
not yet been completed.

F

ECM

B

LOCK MODE

[P1610]

Refer to 

BL-214, "Diag-

nostic Procedure 5"

 .

LOCK MODE

When the starting opera-
tion is carried out 5 or 
more times consecu-
tively under the following 
conditions, IVIS(NATS) 
will shift the mode to 
prevent the engine start.

●

unregistered elec-
tronic 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

EIS00159

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

Diagnostic System Diagram

EIS0015A

Diagnostic Procedure 1

EIS00291

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-200, "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