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NATS (NISSAN ANTI-THEFT SYSTEM)
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CONSULT-IIEIS001RW
CONSULT-II INSPECTION PROCEDURE
1. Turn ignition switch OFF.
2. Insert NATS program card into CONSULT-II.
3. Connect CONSULT-II to data link connector.
4. Turn ignition switch ON.
5. Touch “START”.
6. Select “NATS V.5.0”.
If "NATS V5.0" is not indicated go to GI-34, "
CONSULT-II Data
Link Connector (DLC) Circuit" .
7. Perform each diagnostic test mode according to each service
procedure.
For further information, see the CONSULT-II Operation Manual,
NATS.
CONSULT-II DIAGNOSTIC TEST MODE FUNCTION
Program card : NATS (AEN00B)
SIIA1249E
PBR455D
SEL027X
SEL150X
CONSULT-II DIAGNOSTIC TEST
MODEDescription
C/U INITIALIZATIONWhen replacing any of the following components, C/U initialization and re-registration of all
NATS ignition keys are necessary.
[NATS ignition key/IMMU/ECM/Dongle unit]
SELF-DIAG RESULTSDetected items (screen terms) are as shown in the chart.
BL-86, "
NATS SELF-DIAGNOSTIC RESULTS ITEM CHART"
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BL-86
NATS (NISSAN ANTI-THEFT SYSTEM)
NOTE:
●When any initialization is performed, all ID previously registered will be erased and all NATS igni-
tion keys must be registered again.
●The engine cannot be started with an unregistered key. In this case, the system may show “DIFFERENCE
OF KEY” or “LOCK MODE” as a self-diagnostic result on the CONSULT-II screen.
●When initialization is performed for RHD models, security indicator will flash six times to demonstrate rec-
ognition of the dongle unit ID.
●In rare case, “CHAIN OF ECM-IMMU” might be stored as a self-diagnostic result during key registration
procedure, even if the system is not malfunctioning.
HOW TO READ SELF-DIAGNOSTIC RESULTS
NATS SELF-DIAGNOSTIC RESULTS ITEM CHART
SEL151X
Detected items
(NATS program card screen terms)P No. Code
(Self-diagnostic
result of
“ENGINE”Malfunction is detected when.....Reference
page
ECM INT CIRC-IMMUNATS MAL-
FUNCTION
P1613The malfunction of ECM internal circuit of IMMU commu-
nication line is detected.BL-91
CHAIN OF ECM-IMMUNATS MAL-
FUNCTION
P1612Communication impossible between ECM and IMMU
(In rare case, “CHAIN OF ECM-IMMU” might be stored
during key registration procedure, even if the system is
not malfunctioning.)BL-91
DIFFERENCE OF KEYNATS MAL-
FUNCTION
P1615IMMU can receive the key ID signal but the result of ID
verification between key ID and IMMU is NG.BL-94
CHAIN OF IMMU-KEYNATS MAL-
FUNCTION
P1614IMMU cannot receive the key ID signal.BL-95
ID DISCORD, IMM-ECMNATS MAL-
FUNCTION
P1611The result of ID verification between IMMU and ECM is
NG. System initialization is required.BL-96
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NATS (NISSAN ANTI-THEFT SYSTEM)
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LOCK MODENATS MAL-
FUNCTION
P1610When the starting operation is carried out five or more
times consecutively under the following conditions, NATS
will shift the mode to one which prevents the engine from
being started.
●Unregistered ignition key is used.
●IMMU or ECM's malfunctioning.BL-98
DON'T ERASE BEFORE CHECK-
ING ENG DIAG—All engine trouble codes except NATS trouble code has
been detected in ECM.BL-88
Detected items
(NATS program card screen terms)P No. Code
(Self-diagnostic
result of
“ENGINE”Malfunction is detected when.....Reference
page
Page 3140 of 3833
BL-88
NATS (NISSAN ANTI-THEFT SYSTEM)
Work Flow
EIS001T6
SEL729WE
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NATS (NISSAN ANTI-THEFT SYSTEM)
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Trouble DiagnosesEIS001RX
SYMPTOM MATRIX CHART 1
Self-diagnosis related item
*: When NATS detects trouble, the security indicator lights up while ignition key is in the “ON” position. SYMPTOMDisplayed “SELF-DIAG
RESULTS” on CON-
SULT-II screen.DIAGNOSTIC PROCE-
DURE
(Reference page)SYSTEM
(Malfunctioning part or
mode)REFERENCE PART NO.
OF ILLUSTRATION ON
SYSTEM DIAGRAM
●Security indicator
lighting up*
●Engine cannot be
startedECM INT CIRC-IMMUPROCEDURE 1
(BL-91
)ECM B
CHAIN OF ECM-IMMUPROCEDURE 2
(BL-91
)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 IMMU cir-
cuitC1
Open circuit in ignition
line of IMMU circuitC2
Open circuit in ground
line of IMMU circuitC3
Open circuit in communi-
cation line between
IMMU and ECMC4
Short circuit between
IMMU and ECM commu-
nication line and battery
voltage lineC4
Short circuit between
IMMU and ECM commu-
nication line and ground
lineC4
ECM B
IMMU A
DIFFERENCE OF KEYPROCEDURE 3
(BL-94
)Unregistered key D
IMMU A
CHAIN OF IMMU-KEYPROCEDURE 4
(BL-95
)Malfunction of key ID
chipE
IMMU A
Open circuit in ground
line of dongle unit circuitC6
Open or short circuit in
line between IMMU and
dongle unitC5
Dongle unit G
ID DISCORD, IMM-ECMPROCEDURE 5
(BL-96
)System initialization has
not yet been completed.F
ECM B
LOCK MODEPROCEDURE 7
(BL-98
)LOCK MODE D
●MIL staying ON
●Security indicator
lighting up*DON'T ERASE
BEFORE CHECKING
ENG DIAGWORK FLOW
(BL-88 )Engine trouble data and
NATS trouble data have
been detected in ECM—
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BL-90
NATS (NISSAN ANTI-THEFT SYSTEM)
*: When the vehicle is equipped with a dongle unit (RHD models), the security indicator blinks 6 times just after the ignition switch is
turned to ON. Then the security indicator lights up while the ignition key is in the “ON” position.
SYMPTOM MATRIX CHART 2
Non self-diagnosis related item
DIAGNOSTIC SYSTEM DIAGRAM
SYMPTOMDIAGNOSTIC PROCEDURE
(Reference page)SYSTEM
(Malfunctioning part or mode)REFERENCE PART NO. OF
ILLUSTRATION ON SYSTEM
DIAGRAM
Security Ind. does not light up.PROCEDURE 6
(BL-97
)Security Ind. —
Open circuit between Fuse and
IMMU—
Continuation of initialization
mode—
IMMU A
Security Ind. does not blink just
after initialization even if the
vehicle is equipped with don-
gle unit.
PROCEDURE 8
(BL-99
)NATS might be initialized with-
out connecting dongle unit
properly.—
Open circuit in ground line of
dongle unit circuitC6
Security Ind. does not blink just
after ignition switch is turned to
ON when some malfunction
related to NATS is detected
even if the vehicle is equipped
with dongle unit.Open or short circuit in commu-
nication line between IMMU
and dongle unitC5
Dongle unit G
SEL028X
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Diagnostic Procedure 1EIS001T7
Self-diagnostic results:
“ECM INT CIRC-IMMU” displayed on CONSULT-II screen
1. Confirm SELF-DIAGNOSTIC RESULTS “ECM INT CIRC-IMMU”
displayed on CONSULT-II screen. Ref. part No. B.
2. Replace ECM.
3. Perform initialization with CONSULT-II.
For initialization, refer to “CONSULT-II operation manual NATS”.
Diagnostic Procedure 2EIS001T8
Self-diagnostic results:
“CHAIN OF ECM-IMMU” displayed on CONSULT-II screen
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?
Ye s > > G O T O 2
No >> GO TO BL-89, "
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.
OK or NG
OK >> GO TO 3
NG >> Check the following.
●10A fuse (No. 33, located in the fusible link and fuse
box) – (Gasoline engine)
●10A fuse (No. 43, located in the fusible link and fuse
box) – (Diesel engine)
●Harness for open or short between fuse and IMMU
connector
Ref. Part No. C1
SEL152X
SEL292W
Battery voltage should exist.
SIIA1234E
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BL-92
NATS (NISSAN ANTI-THEFT SYSTEM)
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.
OK or NG
OK >> GO TO 4
NG >> Check the following
●10A fuse [No. 5, located in the fuse block (J/B)]
●Harness 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.
OK or NG
OK >> GO TO 5
NG >> Repair harness. Ref. part No. C3
5. CHECK COMMUNICATION LINE OPEN CIRCUIT
1. Disconnect ECM connector.
2. Check harness continuity between ECM terminal 31 (Gasoline engine) or E20 (Diesel engine) and IMMU
terminal 1.
OK or NG
OK >> GO TO 6
NG >>
●Repair harness or connector.
●Ref. part No. C4 Battery voltage should exist.
SIIA1235E
Continuity should exist.
SIIA1237E
Continuity should exist.
SIIA1238E