immobilizer INFINITI QX56 2006 Factory User Guide

BL-144
IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-NATS)
Revision: November 20092006 QX56
Work FlowEIS0061N
SEL024X

IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-NATS)BL-145
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Revision: November 2009 2006 QX56
Trouble DiagnosesEIS0061O
SYMPTOM MATRIX CHART 1
Self-diagnosis related item
*: When IVIS (NATS) detects a malfunction, the security indicator lights up while ignition key is in the “ON” position.
Symptom
Displayed
“SELF-DIAG
RESULTS ” on CON-
SULT-II screen. Diagnostic Procedure
(Reference page) System
(Malfunctioning part or
mode) Reference Part No. Of
Illustration On System
Diagram

Security indicator
lighting up*

Engine cannot be
started CHAIN OF ECM-IMMU
[P1612] PROCEDURE 1
(BL-147
) In rare case,
“CHAIN OF
ECM-IMMU ” might be
stored during key regis-
tration procedure, even if
the system is not mal-
functioning. —
Open circuit in battery
voltage line of BCM cir-
cuit C1
Open circuit in ignition
line of BCM circuit C2
Open circuit in ground
line of BCM circuit C3
Open or short circuit
between BCM and ECM
communication line C4
ECM B
BCM A
DIFFERENCE OF KEY [P1615] PROCEDURE 2
(BL-148
) Unregistered key D
BCM A
CHAIN OF IMMU-KEY [P1614] PROCEDURE 5
(BL-151
) Malfunction of key ID
chip
E5
Communication line
between ANT/ AMP and
BCM:
Open circuit or short cir-
cuit of battery voltage
line or ground line E1
E2
Open circuit in power
source line of ANT/ AMP
circuit E3
Open circuit in ground
line of ANT/ AMP circuit E4
NATS antenna amp. E6
BCM A
ID DISCORD, IMM-ECM [P1611] PROCEDURE 3
(BL-149
) System initialization has
not yet been completed.
F
ECM B
LOCK MODE [P1610] PROCEDURE 4
(BL-150
) LOCK MODE
D
Security indicator light-
ing up* DON'T ERASE
BEFORE CHECKING ENG DIAG WORK FLOW
(BL-144
) Engine trouble data and
IVIS (NATS) trouble data
have been detected in
ECM
—

BL-146
IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-NATS)
Revision: November 20092006 QX56
SYMPTOM MATRIX CHART 2
Non self-diagnosis related item
*: CONSULT-II self-diagnostic results display screen “no malfunction is detected ”.
DIAGNOSTIC SYSTEM DIAGRAM
Symptom Diagnostic Procedure
(Reference page) System
(Malfunctioning part or mode) Reference Part No. Of Illustra-
tion On System Diagram
Security indicator does not light
up*. PROCEDURE 6
(BL-154
) Combination meter (security
indictor lamp)
—
Open circuit between fuse and
BCM —
BCM A
WIIA0550E

IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-NATS)BL-147
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Diagnostic Procedure 1EIS0061P
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 BL-141, "
CONSULT-II"
.
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 above?
YES >> GO TO 2.
NO >> GO TO BL-145, "
SYMPTOM MATRIX CHART 1" .
2. CHECK POWER SUPPLY CIRCUIT FOR BCM
1. Turn ignition switch OFF.
2. Disconnect BCM.
3. Check voltage between BCM connector M20 terminal 70 and ground.
OK or NG
OK >> GO TO 3.
NG >> Check the following:

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

Harness for open or short between fuse and BCM
connector. Ref. Part No. C1
3. CHECK IGN SW. ON SIGNAL
1. Turn ignition switch ON.
2. Check voltage between BCM connector M18 terminal 38 and ground.
OK or NG
OK >> GO TO 4.
NG >> Check the following:

10A fuse [No. 59, located in the fuse and relay box]

Harness for open or short between fuse and BCM
connector. Ref. part No. C2
PIIA1260E
70 - Ground :Battery voltage
LIIA1279E
38 - Ground :Battery voltage
LIIA0527E

BL-148
IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-NATS)
Revision: November 20092006 QX56
4. CHECK GROUND CIRCUIT FOR BCM
1. Turn ignition switch OFF.
2. Check continuity between BCM connector M18 terminal 67 and ground.
OK or NG
OK >> GO TO 5.
NG >> Repair or replace harness. Ref. part No. C3
5. REPLACE BCM
1. Replace BCM. 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 >> BCM 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-139, "ECM Re-communicating Function" .
Diagnostic Procedure 2EIS0061Q
Self-diagnostic results:
“DIFFERENCE OF KEY” displayed on CONSULT-II screen
1. CONFIRM SELF-DIAGNOSTIC RESULTS
Confirm SELF-DIAGNOSTIC RESULTS “DIFFERENCE OF KEY”
displayed on CONSULT-II screen.
Is CONSULT-II screen displayed as above?
YES >> GO TO 2.
NO >> GO TO BL-145, "
SYMPTOM MATRIX CHART 1" .
67 - Ground
:Continuity should exist.
LIIA1040E
PIIA1261E

IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-NATS)BL-149
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2. PERFORM INITIALIZATION WITH CONSULT-II
Perform initialization with CONSULT-II. Re-register all NATS ignition key IDs.
For initialization and registration of NATS ignition key IDs, refer to “CONSULT-II Operation Manual NATS-IVIS/
NVIS ”.
NOTE:
If the initialization is not completed or malfunctions, CONSULT-II
shows message on the screen.
Can the system be initialized and can the engine be started with re-
registered NATS ignition key?
YES >> Ignition key ID was unregistered. Ref. part No. D
NO >> BCM is malfunctioning.

Replace BCM. Ref. part No. A

Perform initialization with CONSULT-II.

For initialization, refer to “CONSULT-II Operation
Manual NATS-IVIS/NVIS ”.
Diagnostic Procedure 3EIS0061R
Self-diagnostic results:
“ID DISCORD, IMM-ECM” displayed on CONSULT-II screen
1. CONFIRM SELF-DIAGNOSTIC RESULTS
Confirm SELF-DIAGNOSTIC RESULTS “ID DISCORD, IMM-ECM” displayed on CONSULT-II screen.
NOTE:
“ID DISCORD IMM-ECM ”:
Registered ID of BCM is in discord with that of ECM.
Is CONSULT-II screen displayed as above?
YES >> GO TO 2.
NO >> GO TO BL-145, "
SYMPTOM MATRIX CHART 1" .
2. PERFORM INITIALIZATION WITH CONSULT-II
Perform initialization with CONSULT-II. Re-register all NATS ignition key IDs.
For initialization, refer to “CONSULT-II Operation Manual NATS-
IVIS/NVIS ”.
NOTE:
If the initialization is not completed or malfunctions, CONSULT-II
shows message on the screen.
Can the system be initialized?
YES >>
Start engine. (END)

(System initialization had not been completed. Ref.
part No. F )
NO >> ECM is malfunctioning.

Replace ECM. Ref. part No. B

Perform initialization with CONSULT-II.
For initialization, refer to “CONSULT-II Operation Manual NATS-IVIS/NVIS ”.
SEL297W
PIIA1262E
SEL297W

BL-150
IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-NATS)
Revision: November 20092006 QX56
Diagnostic Procedure 4EIS0061S
Self-diagnostic results:
“LOCK MODE” displayed on CONSULT-II screen
1. CONFIRM SELF-DIAGNOSTIC RESULTS
Confirm SELF-DIAGNOSTIC RESULTS “LOCK MODE” is displayed
on CONSULT-II screen.
Is CONSULT-II screen displayed as above?
YES >> GO TO 2.
NO >> GO TO BL-145, "
SYMPTOM MATRIX CHART 1" .
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”). Clear all codes.
NO >> GO TO 3.
3. PERFORM INITIALIZATION WITH CONSULT-II
Perform initialization with CONSULT-II.
For initialization, refer to “CONSULT-II Operation Manual NATS-
IVIS/NVIS ”.
NOTE:
If the initialization is not completed or malfunctions, CONSULT-II
shows the message on the screen.
Can the system be initialized?
YES >> System is OK.
NO >> GO TO 4.
PIIA1264E
SEL297W

IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-NATS)BL-151
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4. PERFORM INITIALIZATION WITH CONSULT-II AGAIN
1. Replace BCM.
2. Perform initialization with CONSULT-II. For initialization, refer to “CONSULT-II Operation Manual NATS-
IVIS/NVIS ”.
NOTE:
If the initialization is not completed or malfunctions, CONSULT-II
shows the message on the screen.
Can the system be initialized?
YES >> System is OK. BCM is malfunctioning. Ref. part No. A
NO >> ECM is malfunctioning.

Replace ECM. Ref. part No. B

Perform initialization with CONSULT-II.
For initialization, refer to “CONSULT-II Operation
Manual NATS-IVIS/NVIS ”.
Diagnostic Procedure 5EIS0061T
Self-diagnostic results:
“CHAIN OF IMMU-KEY” displayed on CONSULT-II screen
1. CONFIRM SELF-DIAGNOSTIC RESULTS
Confirm SELF-DIAGNOSTIC RESULTS “CHAIN OF IMMU-KEY ”
displayed on CONSULT-II screen.
Is CONSULT-II screen displayed as above?
YES >> GO TO 2.
NO >> GO TO BL-145, "
SYMPTOM MATRIX CHART 1" .
2. CHECK NATS ANTENNA AMP. INSTALLATION
Check NATS antenna amp. installation. Refer to BL-155, "
How to Replace NATS Antenna Amp." .
OK or NG
OK >> GO TO 3.
NG >> Reinstall NATS antenna amp. correctly.
3. CHECK IVIS (NATS) IGNITION KEY ID CHIP
Start engine with another registered NATS ignition key.
Does the engine start?
YES >> Ignition key ID chip is malfunctioning.

Replace the ignition key. Ref. part No. E5

Perform initialization with CONSULT-II.
For initialization, refer to “CONSULT-II Operation Manual NATS-IVIS/NVIS ”.
NO >> GO TO 4.
SEL297W
PIIA1263E

BL-152
IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-NATS)
Revision: November 20092006 QX56
4. CHECK POWER SUPPLY FOR NATS ANTENNA AMP.
1. Turn ignition switch ON.
2. Check voltage between NATS antenna amp. connector M21 terminal 1 and ground.
OK or NG
OK >> GO TO 5.
NG >> Repair or replace fuse or harness. Ref. part No. E3
5. CHECK NATS ANTENNA AMP. SIGNAL LINE- 1
Check voltage between NATS antenna amp. connector M21 terminal
2 and ground with analog tester.
OK or NG
OK >> GO TO 6.
NG >>

Repair or replace harness.
NOTE:
If harness is OK, replace BCM, perform initialization with CONSULT-II. For initialization, refer to
“CONSULT-II Operation Manual NATS-IVIS/NVIS ”.
1 - Ground
:Battery voltage
LIIA1498E
LIIA1642E
Connector terminals
(wire colors) Position of ignition key cylinder Voltage (V)
(Approx.)
( + ) ( - )
2 Ground Before inserting ignition key
Battery voltage
After inserting ignition key Pointer of tester should move for approx. 30 seconds,
then return to battery voltage
Just after turning ignition switch ON Pointer of tester should move for approx. 1 second,
then return to battery voltage

IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-NATS)BL-153
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Revision: November 2009 2006 QX56
6. CHECK NATS ANTENNA AMP. SIGNAL LINE- 2
Check voltage between NATS antenna amp. connector M21 terminal
4 and ground with analog tester.
OK or NG
OK >> GO TO 7.
NG >>

Repair or replace harness.
NOTE:
If harness is OK, replace BCM, perform initialization with CONSULT-II. For initialization, refer to
“CONSULT-II Operation Manual NATS-IVIS/NVIS ”.
7. CHECK NATS ANTENNA AMP. GROUND LINE CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect NATS antenna amp. connector.
3. Check continuity between NATS antenna amp. connector M21 terminal 3 and ground.
OK or NG
OK >> NATS antenna amp. is malfunctioning. Ref. part No. E6
NG >>

Repair or replace harness.
NOTE:
If harness is OK, replace BCM, perform initialization
with CONSULT-II. For initialization, refer to “CON-
SULT-II Operation Manual NATS-IVIS/NVIS ”.
LIIA1643E
Connector terminals
(wire colors) Position of ignition key cylinder Voltage (V)
(Approx.)
( + ) ( - )
4 Ground Before inserting ignition key
Battery voltage
After inserting ignition key Pointer of tester should move for approx. 30 seconds,
then return to battery voltage
Just after turning ignition switch ON Pointer of tester should move for approx. 1 second,
then return to battery voltage
3 - Ground :Continuity should exist.
LIIA1283E