Page 1521 of 2395
SYMPTOM MATRIX CHART 2NBEL0224S03(Non self-diagnosis related item)
SYMPTOMDIAGNOSTIC PROCEDURE
(Reference page)SYSTEM
(Malfunctioning part or mode)
Security ind. does not light up.PROCEDURE 6
(EL-344)Security ind.
Open circuit between Fuse and IMMU
Continuation of initialization mode
IMMU
DIAGNOSTIC SYSTEM DIAGRAMNBEL0224S04
SEL087WD
SEL365X
DIAGNOSTIC PROCEDURE 1NBEL0224S05Self-diagnostic results:
ªECM INT CIRC-IMMUº displayed on CONSULT-II screen
1. Confirm SELF-DIAGNOSTIC RESULTS ªECM INT CIRC-
IMMUº displayed on CONSULT-II screen. Ref. part No. B.
2. Replace ECM.
3. Perform initialization with CONSULT-II.
For initialization, refer to ªCONSULT-II operation manual
IVIS/NVISº.
IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM Ð NATS)
Trouble Diagnoses (Cont'd)
EL-336
Page 1522 of 2395
DIAGNOSTIC PROCEDURE 2=NBEL0224S06Self-diagnostic results:
ªCHAIN OF ECM-IMMUº displayed on CONSULT-II screen
1 CONFIRM SELF-DIAGNOSTIC RESULTS
Confirm SELF-DIAGNOSTIC RESULTS ªCHAIN OF ECM-IMMUº displayed on CONSULT-II screen.
NOTE:
In rare case, ªCHAIN OF ECM-IMMUº might be stored during key registration procedure, even if the system is not mal-
functioning.
SEL366X
Is CONSULT-II screen displayed as above?
Ye s©GO TO 2.
No©GO TO SYMPTOM MATRIX CHART 1.
2 CHECK POWER SUPPLY CIRCUIT FOR IMMU
1. Disconnect IMMU connector.
2. Check voltage between terminal 8 of IMMU and ground with CONSULT-II or tester.
SEL302WD
OK or NG
OK©GO TO 3.
NG©Check the following
I7.5A fuse (No. 62, located in the fuse and fusible link box)
IHarness for open or short between fuse and IMMU connector
Ref. Part No. C1
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IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM Ð NATS)
Trouble Diagnoses (Cont'd)
EL-337
Page 1523 of 2395
3 CHECK IGN SW. ON SIGNAL
1. Turn ignition switch ON.
2. Check voltage between terminal 7 of IMMU and ground with CONSULT-II or tester.
SEL303WF
OK or NG
OK©GO TO 4.
NG©Check the following
I10A fuse [No. 16, located in the fuse block (J/B)]
IHarness for open or short between fuse and IMMU connector
Ref. part No. C2
4 CHECK GROUND CIRCUIT FOR IMMU
1. Turn ignition OFF.
2. Check harness continuity between IMMU terminal 4 and ground.
SEL304WD
OK or NG
OK©GO TO 5.
NG©Repair harness.Ref. part No. C3
IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM Ð NATS)
Trouble Diagnoses (Cont'd)
EL-338
Page 1524 of 2395
5 CHECK COMMUNICATION LINE OPEN CIRCUIT
1. Disconnect ECM connector.
2. Check harness continuity between ECM terminal 116 and IMMU terminal 1.
SEL305WD
OK or NG
OK©GO TO 6.
NG©Repair harness or connector.
Ref. part No. C4
6 CHECK COMMUNICATION LINE BATTERY SHORT CIRCUIT
1. Turn ignition ON.
2. Check voltage between ECM terminal 116 or IMMU terminal 1 and ground.
SEL306WD
OK or NG
OK©GO TO 7.
NG©Communication line is short-circuited with battery voltage line or ignition switch ON line.
Repair harness or connectors.
Ref. part No. C4
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IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM Ð NATS)
Trouble Diagnoses (Cont'd)
EL-339
Page 1525 of 2395

7 CHECK COMMUNICATION LINE GROUND SHORT CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between ECM terminal 116 or IMMU terminal 1 and ground.
SEL307WD
OK or NG
OK©GO TO 8.
NG©Communication line is short-circuited with ground line.
Repair harness or connectors.
Ref. part No. C4
8 SIGNAL FROM ECM TO IMMU CHECK
1. Check the signal between ECM terminal 116 and ground with CONSULT-II or oscilloscope when ignition switch is
turned ªONº.
2. Make sure signals which are shown in the figure below can be detected during 750 msec. just after ignition switch is
turned ªONº.
SEL730W
OK or NG
OK©IMMU is malfunctioning.
Replace IMMU.Ref. part No. A
Perform initialization with CONSULT-II.
For the operation of initialization, refer to ªCONSULT-II Operation Manual IVIS/NVISº.
NG©ECM is malfunctioning.
Replace ECM.Ref. part No. B
Perform initialization with CONSULT-II.
For the operation of initialization, refer to ªCONSULT-II Operation Manual IVIS/NVISº.
IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM Ð NATS)
Trouble Diagnoses (Cont'd)
EL-340
Page 1526 of 2395

DIAGNOSTIC PROCEDURE 3=NBEL0224S07Self-diagnostic results:
ªDIFFERENCE OF KEYº displayed on CONSULT-II screen
1 CONFIRM SELF-DIAGNOSTIC RESULTS
Confirm SELF-DIAGNOSTIC RESULTS ªDIFFERENCE OF KEYº displayed on CONSULT-II screen.
SEL367X
Is CONSULT-II screen displayed as above?
Ye s©GO TO 2.
No©GO TO SYMPTOM MATRIX CHART 1.
2 PERFORM INITIALIZATION WITH CONSULT-II
Perform initialization with CONSULT-II. Re-register all IVIS (NATS) ignition key IDs.
For initialization and registration of IVIS (NATS) ignition key IDs, refer to ªCONSULT-II operation manual IVIS/NVISº.
SEL297W
NOTE:
If the initialization is not completed or fails, CONSULT-II shows above message on the screen.
Can the system be initialized and can the engine be started with re-registered IVIS (NATS) ignition key?
Ye s©Ignition key ID was unregistered.Ref. part No. D
No©IMMU is malfunctioning.
Replace IMMU.Ref. part No. A
Perform initialization with CONSULT-II.
For initialization, refer to ªCONSULT-II operation manual IVIS/NVISº.
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IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM Ð NATS)
Trouble Diagnoses (Cont'd)
EL-341
Page 1527 of 2395

DIAGNOSTIC PROCEDURE 4=NBEL0224S08Self-diagnostic results:
ªCHAIN OF IMMU-KEYº displayed on CONSULT-II screen
1 CONFIRM SELF-DIAGNOSTIC RESULTS
Confirm SELF-DIAGNOSTIC RESULTS ªCHAIN OF IMMU-KEYº displayed on CONSULT-II screen.
SEL368X
Is CONSULT-II screen displayed as above?
Ye s©GO TO 2.
No©GO TO SYMPTOM MATRIX CHART 1.
2 CHECK IVIS (NATS) IGNITION KEY ID CHIP
Start engine with another registered IVIS (NATS) ignition key.
Does the engine start?
Ye s©Ignition key ID chip is malfunctioning.
Replace the ignition key.
Ref. part No. E
Perform initialization with CONSULT-II.
For initialization, refer to ªCONSULT-II Operation Manual IVIS/NVISº.
No©GO TO 3.
3 CHECK IMMU INSTALLATION
Check IMMU installation.
Refer to ªHow to Replace IMMUº in EL-347.
OK or NG
OK©IMMU is malfunctioning.
Replace IMMU.Ref. part No. A
Perform initialization with CONSULT-II.
For initialization, refer to ªCONSULT-II Operation Manual IVIS/NVISº.
NG©Reinstall IMMU correctly.
IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM Ð NATS)
Trouble Diagnoses (Cont'd)
EL-342
Page 1528 of 2395

DIAGNOSTIC PROCEDURE 5=NBEL0224S09Self-diagnostic results:
ªID DISCORD, IMM-ECMº displayed on CONSULT-II screen
1 CONFIRM SELF-DIAGNOSTIC RESULTS
Confirm SELF-DIAGNOSTIC RESULTS ªID DISCORD, IMM-ECMº displayed on CONSULT-II screen.
SEL369X
NOTE:
ªID DISCORD IMMU-ECMº:
Registered ID of IMMU is in discord with that of ECM.
Is CONSULT-II screen displayed as above?
Ye s©GO TO 2.
No©GO TO SYMPTOM MATRIX CHART 1.
2 PERFORM INITIALIZATION WITH CONSULT-II
Perform initialization with CONSULT-II. Re-register all IVIS (NATS) ignition key IDs.
For initialization, refer to ªCONSULT-II operation manual IVIS/NVISº.
SEL297W
NOTE:
If the initialization is not completed or fails, CONSULT-II shows above message on the screen.
Can the system be initialized?
Ye s©Start engine. (END)
(System initialization had not been completed.Ref. part No. F)
No©ECM is malfunctioning.
Replace ECM.Ref. part No. F
Perform initialization with CONSULT-II.
For initialization, refer to ªCONSULT-II operation manual IVIS/NVISº.
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IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM Ð NATS)
Trouble Diagnoses (Cont'd)
EL-343