Ac system INFINITI QX4 2001 Factory Service Manual

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

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

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

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

DIAGNOSTIC PROCEDURE 6=NBEL0224S10ªSECURITY INDICATOR LAMP DOES NOT LIGHT UPº
1 CHECK FUSE
Check 10A fuse [No. 12, located in the fuse block (J/B)].
Is 10A fuse OK?
Ye s©GO TO 2.
No©Replace fuse.
2 CHECK SECURITY INDICATOR LAMP
1. Install 10A fuse.
2. Perform initialization with CONSULT-II.
For initialization, refer to ªCONSULT-II Operation Manual IVIS/NVISº.
3. Turn ignition switch OFF.
4. Start engine and turn ignition switch OFF.
5. Check the security indicator lamp lighting.
Security indicator lamp should be blinking.
OK or NG
OK©INSPECTION END
NG©GO TO 3.
3 CHECK SECURITY INDICATOR LAMP POWER SUPPLY CIRCUIT
1. Disconnect security indicator lamp connector.
2. Check voltage between security indicator lamp connector terminal 1 and ground.
SEL370X
OK or NG
OK©GO TO 4.
NG©Check harness for open or short between fuse and security indicator lamp.
4 CHECK SECURITY INDICATOR LAMP
Check security Indicator Lamp.
Is security indicator lamp OK?
Ye s©GO TO 5.
No©Replace security indicator lamp.
IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM Ð NATS)
Trouble Diagnoses (Cont'd)
EL-344

5 CHECK IMMU FUNCTION
1. Connect IMMU connector.
2. Disconnect security indicator lamp connector.
3. Check continuity between IMMU terminal 5 and ground.
SEL300WC
OK or NG
OK©Check harness for open or short between security indicator lamp and IMMU.
NG©IMMU is malfunctioning.
Replace IMMU.
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-345

DIAGNOSTIC PROCEDURE 7=NBEL0224S11Self-diagnostic results:
ªLOCK MODEº displayed on CONSULT-II screen
1 CONFIRM SELF-DIAGNOSTIC RESULTS
Confirm SELF-DIAGNOSTIC RESULTS ªLOCK MODEº is displayed on CONSULT-II screen.
SEL371X
Is CONSULT-II screen displayed as above?
Ye s©GO TO 2.
No©GO TO 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.
4. Repeat steps 2 and 3 twice (total of three cycles).
5. Start the engine.
Does engine start?
Ye s©System is OK.
(Now system is escaped from ªLOCK MODEº.)
No©GO TO 3.
3 CHECK IMMU ILLUSTRATION
Check IMMU installation. Refer to ªHow to Replace IMMUº in EL-347.
OK or NG
OK©GO TO 4.
NG©Reinstall IMMU correctly.
IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM Ð NATS)
Trouble Diagnoses (Cont'd)
EL-346

4 PERFORM INITIALIZATION WITH CONSULT-II
Perform initialization with CONSULT-II.
For initialization, refer to ªCONSULT-II operation manual IVIS/NVISº.
SEL297W
NOTE:
If the initialization is not completed or fails, CONSULT-II shows the above message on the screen.
Can the system be initialized?
Ye s©System is OK.
No©GO TO DIAGNOSTIC PROCEDURE 4 to check ªCHAIN OF IMMU-KEYº, refer to
EL-342.
SEL096WB
How to Replace IVIS (NATS) IMMUNBEL0225NOTE:
IIf IVIS (NATS) IMMU is not installed correctly, IVIS (NATS)
system will not operate properly and SELF-DIAG
RESULTS on CONSULT-II screen will show ªLOCK
MODEº.
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IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM Ð NATS)
Trouble Diagnoses (Cont'd)
EL-347

PrecautionNBEL0177CAUTION:
IUse CONSULT-II to set the system ªDemonstration modeº if INFINITI Communicator needs to be
activated during service procedures. (For details of the demonstration mode, refer to EL-379.)
IMake sure to turn the demonstration mode OFF before returning the vehicle to the owner.
IIn the demonstration mode, no service from the Communicator Response Center is available.
Therefore, even if the customer encounters an emergency, no service will be dispatched.
IIf the theft warning system is activated for more than 7 seconds, INFINITI Communicator will dial
to the Communicator Response Center automatically. The operator will contact the customer to
confirm whether the vehicle has been stolen or not.
IWhen ªMaydayº emergency dialing is activated (if the system is not in the demonstration mode),
the Communicator Response Center operator will come online. If there is no emergency, the
operator will ask the occupant for the user password (option). Failure to provide the correct pass-
word results in a police response.
IIVCS unit memory includes VIN (Vehicle Identification Number) and other such vehicle specific
data. Therefore, the IVCS unit cannot be transferred to another vehicle. When the IVCS unit is
replaced, the new unit must be set up and programmed. The INFINITI Communicator system auto-
matically contacts the Communicator Response Center the first time the vehicle is started after a
phone number has been changed or a module (IVCS unit) is replaced. The VIN will be written in
the memory of the new unit by transmitting data from the Communicator Response Center. For
details, refer to ªSystem Settingº, EL-381.
IBefore servicing the vehicle, confirm that the VIN memorized by the IVCS unit is the same as the
VIN on the vehicle's identification plate.
Communicator Response Center Telephone
Number for Technicians
NBEL0178The Communicator Response Center telephone number for technicians is1-888-427-4812.
Whenever an INFINITI dealer technician dials the above number, the following information will be required by
the Communicator Response Center operator.
ICustomer name
IUnit ID number of old IVCS unit (For details, refer to EL-367.)
IUnit ID number of new IVCS unit
IVIN
IDealer name and code (For security purposes)
IDealer contact person (technician)
IDealer phone and fax numbers
INFINITI COMMUNICATOR (IVCS)
Precaution
EL-348

System DescriptionNBEL0180OUTLINENBEL0180S01INFINITI Communicator system uses the Global Positioning Sys-
tem (GPS), cellular phone technology and the Communicator
Response Center to provide the following functions.
IOne touch ªInformationº dialing
IOne touch ªMaydayº emergency dialing
IAutomatic air bag inflation notification
IStolen vehicle tracking
IAlarm notification
IRemote door unlock
There are limitations to the INFINITI Communicator system. To
understand the system, read SYSTEM LIMITATIONS (EL-351)
thoroughly.
SYSTEM COMPOSITIONNBEL0180S02IThe INFINITI Communicator system is controlled by the IVCS
(In Vehicle Communication System) unit. System status (ªMay-
dayº-emergency dialing, or re-dialing, etc.) is displayed by the
indicators in the IVCS switch.
IThe INFINITI Communicator system can only make calls to the
Communicator Response Center and receive calls from the
center, unless the customer chooses to have the optional
handset install.
SEL099W
INFINITI COMMUNICATOR (IVCS)
System Description
EL-350