Infiniti FX35 / FX45. Manual - part 232

IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-NATS)

BL-195

< SERVICE INFORMATION >

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Trouble Diagnosis Symptom Chart

INFOID:0000000001327932

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

Security Indicator Inspection

INFOID:0000000001327933

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

Diagnosis Procedure 1

INFOID:0000000001327934

Self-diagnostic results:
“CHAIN OF ECM-IMMU” is display on CONSULT-III screen
First perform the “SELF-DIAG RESULTS” in “BCM” with CONSULT-III, then perform the trouble diag-
nosis of malfunction system indicated “SELF-DIAG RESULTS” of “BCM”. Refer to 

BCS-13, "U1000

CAN Communication Circuit"

.

1.

CONFIRM SELF-DIAGNOSTIC RESULTS

Confirm that SELF-DIAGNOSTIC RESULTS “CHAIN OF ECM-IMMU” is displayed on the screen?
Does CONSULT-III screen display as shown in figure?

SYMPTOM

Displayed “SELF-DIAG 

RESULTS” on CON-

SULT-III screen.

DIAGNOSTIC PROCE-

DURE

SYSTEM (Malfunctioning part or mode)

• Security indicator 

lighting up*

• Engine hard to start

CHAIN OF ECM-IMMU

[P1612]

Refer to 

BL-195, "Diag-

nosis Procedure 1"

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Open circuit in battery voltage line to BCM (NATS 
IMMU) circuit

Open circuit in ignition line to BCM (NATS IMMU) cir-
cuit

Open circuit in ground line to BCM (NATS IMMU) cir-
cuit

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

ECM

BCM (NATS IMMU)

DIFFERENCE OF KEY

[P1615]

Refer to 

BL-197, "Diag-

nosis Procedure 2"

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Unregistered key

NATS IMMU

CHAIN OF IMMU-KEY

[P1614]

Refer to 

BL-198, "Diag-

nosis Procedure 5"

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Open or short circuit between BCM (NATS IMMU) 
and NATS antenna amp.

Malfunction of key ID chip

BCM (NATS IMMU)

Antenna amp.

ID DISCORD, IMM-ECM

[P1611]

Refer to 

BL-197, "Diag-

nosis Procedure 3"

System initialization has not yet been completed.

ECM

LOCK MODE

[P1610]

Refer to 

BL-197, "Diag-

nosis Procedure 4"

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LOCK MODE

• MIL staying ON
• Security indicator 

lighting up*

DON'T ERASE BEFORE 

CHECKING ENG DIAG

Refer to 

BL-194, "Diag-

nosis Procedure"

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

SYMPTOM

SYSTEM

(Malfunctioning part or mode)

DIAGNOSTIC PROCEDURE

Security indicator does not operate*

Security indicator

Refer to 

BL-200, "Diagnosis 

Procedure 6"

.

Open circuit between Fuse and BCM (NATS IM-
MU)

Continuation of initialization mode

BCM (NATS IMMU)

BL-196

< SERVICE INFORMATION >

IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-NATS)

YES

>> GO TO 2.

NO

>> Refer to 

BL-195, "Trouble Diagnosis Symptom Chart"

.

2.

CHECK POWER SUPPLY CIRCUIT FOR BCM

1.

Turn ignition switch OFF.

2.

Disconnect BCM connector M4.

3.

Check voltage between BCM connector M4 terminals and
ground.

OK or NG

OK

>> GO TO 3. 

NG

>>

Check the following.

• 50A fusible link [Letter M, located in fuse block (J/B)]
• 15A fuse [No.22, located in fuse block (J/B)]
• Harness for open or short between fusible link or fuse

and BCM.

3.

CHECK IGNITION SWITCH ON SIGNAL

1.

Turn ignition switch ON.

2.

Check voltage between BCM connector M3 terminal and
ground.

OK or NG

OK

>> GO TO 4. 

NG

>>

Check the following.

• 15A fuse [No.1, located in fuse block (J/B)]
• Harness for open or short between fuse and BCM.

4.

CHECK GROUND CIRCUIT FOR BCM

1.

Turn ignition switch OFF.

2.

Check continuity between BCM connector M4 terminals 49 (B), 52 (B) and ground.

OK or NG

OK

>> GO TO 5.

NG

>> Repair or replace harness between BCM and ground.

5.

REPLACE BCM

1.

Replace BCM.

2.

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

Does the engine start?

YES

>>

BCM is malfunctioning.

• Replace BCM.
• Perform initialization with CONSULT-III.
• For initialization, refer to “CONSULT-III Operation Manual NATS-IVIS/NVIS”.

NO

>>

ECM is malfunctioning.

42 (L/R) – Ground

: Battery voltage

55 (G) – Ground

: Battery voltage

PIIA6143E

38 (W/L) – Ground

: Battery voltage

PIIA6144E

49 (B) – Ground

: Continuity should exist.

52 (B) – Ground

: Continuity should exist.

PIIA5084E

IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-NATS)

BL-197

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• Replace ECM.
• Perform initialization or re-communicating function.
- For re-communicating function, refer to 

BL-187, "ECM Re-Communicating Function"

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

Diagnosis Procedure 2

INFOID:0000000001327935

Self-diagnostic results:
“DIFFERENCE OF KEY” is displayed on CONSULT-III screen

1.

CONFIRM SELF-DIAGNOSTIC RESULTS

Confirm that SELF-DIAGNOSTIC RESULTS “DIFFERENCE OF KEY” is displayed on CONSULT-III screen.
Does CONSULT-III screen display as shown in figure?

YES

>> GO TO 2.

NO

>> Refer to 

BL-195, "Trouble Diagnosis Symptom Chart"

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2.

PERFORM INITIALIZATION WITH CONSULT-III

Perform initialization with CONSULT-III. Re-register all ignition key or mechanical key IDs.
For initialization and registration of ignition key or mechanical key IDs, refer to “CONSULT-III Operation Man-
ual NATS-IVIS/NVIS”.
NOTE:
If the initialization is not completed or malfunction, CONSULT-III shows message on the screen.
Can the system be initialized and can the engine be started with re-registered ignition key or mechanical key?

YES

>> Ignition key ID was unregistered.

NO

>>

BCM is malfunctioning.

• Replace BCM.
• Perform initialization with CONSULT-III.
• For initialization, refer to “CONSULT-III Operation Manual NATS-IVIS/NVIS”.

Diagnosis Procedure 3

INFOID:0000000001327936

Self-diagnostic results:
“ID DISCORD, IMM-ECM” is displayed on CONSULT-III screen

1.

CONFIRM SELF-DIAGNOSTIC RESULTS

Confirm that SELF-DIAGNOSTIC RESULTS “ID DISCORD, IMM-ECM” is displayed on CONSULT-III screen.
NOTE:
“ID DISCORD IMM-ECM”:
Registered ID of BCM is in discord with that of ECM.

Does CONSULT-III screen display as shown in figure?

YES

>> GO TO 2.

NO

>> Refer to 

BL-195, "Trouble Diagnosis Symptom Chart"

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2.

PERFORM INITIALIZATION WITH CONSULT-III

Perform initialization with CONSULT-III. Re-register all ignition key or mechanical key IDs.
For initialization, refer to “CONSULT-III Operation Manual NATS-IVIS/NVIS”.
NOTE:
If the initialization is not completed or malfunction, CONSULT-III shows message on the screen.

Can the system be initialized?

YES

>>

Start engine. (END)

• System initialization had not been completed. 

NO

>>

ECM is malfunctioning.

• Replace ECM.
• Perform initialization or re-communicating function.
- For initialization, refer to “CONSULT-III Operation Manual NATS-IVIS/NVIS”.
- For re-communicating function, refer to 

BL-187, "ECM Re-Communicating Function"

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Diagnosis Procedure 4

INFOID:0000000001327937

Self-diagnostic results:

BL-198

< SERVICE INFORMATION >

IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-NATS)

“LOCK MODE” displayed on CONSULT-III screen

1.

CONFIRM SELF-DIAGNOSTIC RESULTS

Confirm SELF-DIAGNOSTIC RESULTS “LOCK MODE” is displayed on CONSULT-III screen.

Does CONSULT-III screen display as shown in figure?

YES

>> GO TO 2.

NO

>> Refer to 

BL-195, "Trouble Diagnosis Symptom Chart"

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2.

ESCAPE FROM LOCK MODE

1.

Turn ignition switch OFF.

2.

Turn ignition switch ON with registered key. (Do not start engine.) Wait 5 seconds.

3.

Return the key to OFF position. Wait 5 seconds.

4.

Repeat steps 2 and 3 twice (total of three cycles).

5.

Start the engine.

Does engine start?

YES

>> System is OK (Now system is escaped from “LOCK MODE”).

NO

>> GO TO 3.

3.

PERFORM INITIALIZATION WITH CONSULT-III

Perform initialization with CONSULT-III.
For initialization, refer to “CONSULT-III Operation Manual NATS-IVIS/NVIS”.
NOTE:
If the initialization is not completed or malfunction, CONSULT-III shows the message on the screen.
Can the system be initialized?

YES

>> System is OK.

NO

>> GO TO 4.

4.

PERFORM INITIALIZATION WITH CONSULT-III AGAIN

1.

Replace BCM.

2.

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

NOTE:
If the initialization is not completed or malfunctions, CONSULT-III shows the message on the screen.
Can the system be initialized?

YES

>>

System is OK. BCM is malfunctioning.

• Replace BCM.
• Perform initialization with CONSULT-III.
• For initialization, refer to “CONSULT-III Operation Manual NATS-IVIS/NVIS”.

NO

>>

ECM is malfunctioning.

• Replace ECM.
• Perform initialization or re-communicating function.
- For initialization, refer to “CONSULT-III Operation Manual NATS-IVIS/NVIS”.
- For re-communicating function, refer to 

BL-187, "ECM Re-Communicating Function"

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Diagnosis Procedure 5

INFOID:0000000001327938

Self-diagnostic results:
“CHAIN OF IMMU-KEY” is displayed on CONSULT-III screen

1.

CONFIRM SELF-DIAGNOSTIC RESULTS

Confirm self-diagnostic results “CHAIN OF IMMU-KEY” is displayed on CONSULT-III screen.

Does CONSULT-III screen display as shown?

YES

>> GO TO 2.

NO

>> Refer to 

BL-195, "Trouble Diagnosis Symptom Chart"

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2.

CHECK NATS ANTENNA AMP. INSTALLATION

Check NATS antenna amp. installation. Refer to 

BL-201, "Removal and Installation NATS Antenna Amp"

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OK or NG

OK

>> GO TO 3.