2001 NISSAN ALMERA engine

System Composition=NJEL0408The immobilizer function of the NATS consists of the following:
+NATS ignition key
+NATS immobilizer control unit (IMMU) located in the ignition key cylinder
+Engine control module (ECM)
+Dongle unit (RHD models)
+Security indicator
+Navigation control unit (Models with Navigation system)
NEL776
NATS (NISSAN ANTI-THEFT SYSTEM)
System Composition
EL-424

Wiring Diagram Ð NATS Ð/SedanNJEL0409GASOLINE ENGINE MODELSNJEL0409S01
HEL422B
NATS (NISSAN ANTI-THEFT SYSTEM)
Wiring Diagram Ð NATS Ð/Sedan
EL-425

DIESEL ENGINE MODELSNJEL0409S02
HEL423B
NATS (NISSAN ANTI-THEFT SYSTEM)
Wiring Diagram Ð NATS Ð/Sedan (Cont'd)
EL-426

CONSULT-II DIAGNOSTIC TEST MODE FUNCTION=NJEL0410S02
CONSULT-II DIAGNOSTIC TEST
MODEDescription
C/U INITIALIZATION When 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 RESULTS Detected items (screen terms) are as shown in the chart EL-430.
NOTE:
+When any initialization is performed, all ID previously reg-
istered will be erased and all NATS ignition keys must be
registered again.
+The engine cannot be started with an unregistered key. In this
case, the system may show ªDIFFERENCE OF KEYº or
ªLOCK MODEº as a self-diagnostic result on the CONSULT-II
screen.
+When initialization is performed for RHD models for Europe,
security indicator will flash six times to demonstrate recognition
of the dongle unit ID.
+In rare case, ªCHAIN OF ECM-IMMUº might be stored as a
self-diagnostic result during key registration procedure, even if
the system is not malfunctioning.
HOW TO READ SELF-DIAGNOSTIC RESULTSNJEL0410S03
SEL151X
NATS (NISSAN ANTI-THEFT SYSTEM)
CONSULT-II (Cont'd)
EL-430

NATS SELF-DIAGNOSTIC RESULTS ITEM CHART=NJEL0410S04
Detected items (NATS program card
screen terms)P No. Code
(Self-diag-
nostic result
of ªENGINEºMalfunction is detected when .....
Reference page
ECM INT CIRC-IMMUNATS MAL-
FUNCTION
P1613The malfunction of ECM internal circuit of IMMU com-
munication line is detected. EL-435
CHAIN OF ECM-IMMUNATS MAL-
FUNCTION
P1612Communication impossible between ECM and IMMU
(In rare case, ªCHAIN OF ECM-IMMUº might be stored
during key registration procedure, even if the system is
not malfunctioning.)EL-436
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. EL-440
CHAIN OF IMMU-KEYNATS MAL-
FUNCTION
P1614IMMU cannot receive the key ID signal.
EL-441
ID DISCORD, IMM-ECMNATS MAL-
FUNCTION
P1611The result of ID verification between IMMU and ECM is
NG. System initialization is required. EL-443
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.EL-446
DON'T ERASE BEFORE
CHECKING ENG DIAGÐAll engine trouble codes except NATS trouble code has
been detected in ECM.EL-432
NATS (NISSAN ANTI-THEFT SYSTEM)
CONSULT-II (Cont'd)
EL-431

SYMPTOM MATRIX CHART 1NJEL0411S02(Self-diagnosis related item)
SYMPTOMDisplayed ªSELF-DIAG
RESULTSº 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
(EL-435)ECM B
CHAIN OF ECM-IMMUPROCEDURE 2
(EL-436)In rare case, ªCHAIN
OF ECM-IMMUº might
be stored during key
registration procedure,
even if the system is not
malfunctioning.Ð
Open circuit in battery
voltage line of IMMU
circuitC1
Open circuit in ignition
line of IMMU circuitC2
Open circuit in ground
line of IMMU circuitC3
Open circuit in commu-
nication line between
IMMU and ECMC4
Short circuit between
IMMU and ECM com-
munication line and bat-
tery voltage lineC4
Short circuit between
IMMU and ECM com-
munication line and
ground lineC4
ECM B
IMMU A
DIFFERENCE OF KEYPROCEDURE 3
(EL-440)Unregistered key D
IMMU A
CHAIN OF IMMU-KEYPROCEDURE 4
(EL-441)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
(EL-443)System initialization has
not yet been completed.F
ECM B
LOCK MODEPROCEDURE 7
(EL-446)LOCK MODE D
NATS (NISSAN ANTI-THEFT SYSTEM)
Trouble Diagnoses (Cont'd)
EL-433

SYMPTOMDisplayed ªSELF-DIAG
RESULTSº on CON-
SULT-II screen.DIAGNOSTIC PROCE-
DURE
(Reference page)SYSTEM
(Malfunctioning part or
mode)REFERENCE PART
NO. OF ILLUSTRATION
ON SYSTEM DIAGRAM
+MIL staying ON
+Security indicator
lighting up*DON'T ERASE
BEFORE CHECKING
ENG DIAGWORK FLOW
(EL-432)Engine trouble data and
NATS trouble data have
been detected in ECMÐ
*: When NATS detects trouble, the security indicator lights up while ignition key is in the ªONº position.
*: When the vehicle is equipped with a dongle unit (RHD models for Europe), 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 ªONº position.
SYMPTOM MATRIX CHART 2NJEL0411S03(Non self-diagnosis related item)
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
(EL-444)Security ind. Ð
Open circuit between Fuse and
IMMUÐ
Continuation of initialization
modeÐ
IMMU A
Security ind. does not blink just
after initialization even if the
vehicle is equipped with dongle
unit.
PROCEDURE 8
(EL-448)NATS might be initialized with-
out connecting dongle unit
properly.Ð
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 com-
munication line between IMMU
and dongle unitC5
Dongle unit G
DIAGNOSTIC SYSTEM DIAGRAMNJEL0411S04
SEL028X
NATS (NISSAN ANTI-THEFT SYSTEM)
Trouble Diagnoses (Cont'd)
EL-434

DIAGNOSTIC PROCEDURE 2=NJEL0411S06Self-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.
SEL302WB
OK or NG
OK©GO TO 3.
NG©Check the following
+10A fuse (No. 36, located in the fusible link and fuse box) Ð (Gasoline engine)
+20A fuse (No. 34, located in the fusible link and fuse box) Ð (Diesel engine)
+Harness for open or short between fuse and IMMU connector
Ref. Part No. C1
NATS (NISSAN ANTI-THEFT SYSTEM)
Trouble Diagnoses (Cont'd)
EL-436