Infiniti M35/M45 Y50. Manual - part 301

IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-NATS)

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7. 

TROUBLE DIAGNOSIS

Repair IVIS (NATS) according to “SELF DIAGNOSIS”.

NOTE:
Do not erase “SELF DIAGNOSIS” using CONSULT-II.

>> GO TO 8.

8. 

CONFIRM SELF DIAGNOSIS

Confirm SELF DIAGNOSIS “ECM” using CONSULT-II.

>> GO TO 9.

9. 

CONFIRM SELF DIAGNOSIS DISPLAY

In case that malfunction of engine control system is displayed other than “NATS MALFUNCTION” in “SELF
DIAGNOSIS”, repair engine control system.

NOTE:
In case that only “NATS MALFUNCTION” is displayed, erase record of “SELF DIAGNOSIS”.

>> GO TO 10.

10. 

CHECK ENGINE FOR START

Check that the engine can be started when Push-button ignition switch is operated with Intelligent Key
inserted into the key slot.

NG

>> GO TO 2.

OK

>> GO TO 11.

11. 

CONFIRM SELF DIAGNOSIS

Confirm SELF DIAGNOSIS “ECM” using CONSULT-II.

“NO DTC” is displayed.>>Inspection END.
Malfunction information is displayed.>>GO TO 2.

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IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-NATS)

Symptom Chart for Security Indicator

NIS0020Q

Security indicator does not turn ON or flash.

CAUTION:

●

Follow Trouble Diagnosis Flowchart referring to “Diagnosis Procedure”. Determine malfunction-
ing condition before performing this diagnosis.

●

Make sure that vehicle is under the condition shown in “Conditions of vehicle” before starting
diagnosis.

●

Check systems shown in the “Action” column in this order.

CONDITIONS OF VEHICLE (OPERATING CONDITIONS)

●

Intelligent Key is not inserted into key slot.

●

Engine switch is not depressed.

Check Security Indicator Harness

NIS0020R

1. 

SECURITY INDICATOR LAMP ACTIVE TEST 

 With CONSULT-II

Check (“THEFT IND”) in “ACTIVE TEST” mode with CONSULT-II.

OK or NG

OK

>> Security indicator lamp is OK.

NG

>> GO TO 2.

Action

Reference page

1. Check security indicator harness

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2. Replace BCM

BCS-15

Perform operation shown on display indicator lamp 
should illuminate.

PIIA7005E

IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-NATS)

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2. 

CHECK HARNESS CONTINUITY

1.

Turn ignition switch OFF.

2.

Disconnect multifunction switch (security indicator) connector.

3.

Check voltage between multifunction switch (security indicator)
connector and ground.

OK or NG

OK

>> Check the following.

●

Harness for open or short between BCM and multifunction switch (security indicator)

●

Security indicator lamp condition

NG

>> Check the following.

●

15A fuse [No.37, located in fuse block (J/B)]

●

Harness for open or short between multifunction switch (security indicator) and fuse

DTC P1612 CHAIN of ECM-IMMU

NIS0020S

Self-diagnostic results:
“CHAIN OF ECM-IMMU” displayed on CONSULT-II screen
First perform the “SELF-DIAG RESULTS” in “BCM” with CONSULT-II, then perform the trouble diagno-
sis of malfunction system indicated “SELF-DIAG RESULTS” of “BCM”. Refer to 

BCS-13, "CAN Com-

munication Inspection Using CONSULT-II (Self-Diagnosis)"

 .

1. 

CONFIRM SELF-DIAGNOSTIC RESULTS

Confirm SELF-DIAGNOSTIC RESULTS “CHAIN OF ECM-IMMU”
displayed on CONSULT-II 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 shown in figure?

Yes

>> GO TO 2.

No

>> GO TO 

BL-268, "“NATS V5.0” SELF-DIAGNOSTIC

RESULTS ITEM CHART"

 .

Terminals

Voltage (V)

(Approx.)

(+)

(–)

multifunction switch 

(security indicator) 

connector

Terminal

M69

1

Ground

Battery voltage

PIIB6218E

PIIA1260E

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IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-NATS)

2. 

CHECK POWER SUPPLY CIRCUIT FOR BCM

Check voltage between BCM and ground with CONSULT-II or tester.

OK or NG

OK

>> GO TO 3.

NG

>> Check the following.

●

50A fusible link (letter F , located in the fuse and fusible link box)

●

10A fuse [No.21, located in the fuse block (J/B)]

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15A fuse [No. 1, located in the fuse block (J/B)]

●

Harness for open or short between fusible link and BCM

●

Harness for open or short between fuse and BCM

3. 

CHECK GROUND CIRCUIT FOR BCM

1.

Turn ignition switch OFF.

2.

Disconnect BCM connector.

3.

Check continuity between BCM connector and ground.

OK or NG

OK

>> GO TO 4.

NG

>> Repair or replace harness.

4. 

REPLACE BCM

1.

Replace BCM

2.

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

Does the engine start?

Yes

>> BCM is malfunctioning.

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Replace BCM.

●

Perform initialization with CONSULT-II

●

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

No

>> ECM is malfunctioning.

●

Replace ECM.

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Perform initialization or re-communicating function

●

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

●

For re-communicating function, refer to 

BL-248, "ECM Re-Communicating Function"

Terminals

Condition of 

ignition switch

Voltage (V)

(Approx.)

(+)

(–)

BCM connector

Terminal 

M1

38

Ground

ON

Battery voltage

M2

42

OFF

55

PIIB5934E

BCM connector

Terminal

Ground

Continuity 

M2

52

Yes

PIIB5935E