NISSAN X-TRAIL 2001 Service Repair Manual

NATS (NISSAN ANTI-THEFT SYSTEM)
BL-89
C
D
E
F
G
H
J
K
L
MA
B
BL
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—

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

NATS (NISSAN ANTI-THEFT SYSTEM)
BL-91
C
D
E
F
G
H
J
K
L
MA
B
BL
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

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

NATS (NISSAN ANTI-THEFT SYSTEM)
BL-93
C
D
E
F
G
H
J
K
L
MA
B
BL
6.CHECK COMMUNICATION LINE BATTERY SHORT CIRCUIT
1. Turn ignition ON.
2. Check voltage between ECM terminal 31 (Gasoline engine) or E20 (Diesel engine) or IMMU terminal 1
and ground.
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
7.CHECK COMMUNICATION LINE GROUND SHORT CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between ECM terminal 31 (Gasoline engine) or E20 (Diesel engine) or IMMU terminal 1
and ground.
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 31 (Gasoline engine) or E20 (Diesel engine) and ground with
CONSULT-II or oscilloscope when ignition switch is turned “ON”.
2. Make sure signals which are shown in the figure below can be
detected during 750 msec. just after ignition switch is turned
“ON”.
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 “CONSULT-
II Operation Manual NATS”.
NG >>
●ECM is malfunctioning.
●Replace ECM. Ref. part No. B
●Perform initialization with CONSULT-II.
●For the operation of initialization, refer to “CONSULT-II Operation Manual NATS”. Voltage: Approx. 0V
SIIA1239E
Continuity should exist.
SIIA1240E
SEL730W

BL-94
NATS (NISSAN ANTI-THEFT SYSTEM)
Diagnostic Procedure 3
EIS001T9
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-89, "
SYMPTOM MATRIX CHART 1" .
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”.
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 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 “CONSULT-II operation man-
ual NATS”.
SEL367X
SEL297W

NATS (NISSAN ANTI-THEFT SYSTEM)
BL-95
C
D
E
F
G
H
J
K
L
MA
B
BL
Diagnostic Procedure 4EIS001TA
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?
Ye s > > G O T O 2
No >> GO TO BL-89, "
SYMPTOM MATRIX CHART 1" .
2.CHECK NATS IGNITION KEY ID CHIP
Start engine with another registered 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 “CONSULT-II Operation Manual NATS”.
No >>
●Models without dongle unit
–IMMU is malfunctioning.
–Replace IMMU. Ref. part No. A
–For initialization, refer to “CONSULT-II Operation Manual NATS”.
–Perform initialization with CONSULT-II.
●Models with dongle unit
–GO TO 3
3.CHECK HARNESS CONNECTOR CONNECTION
Check harness connector connection between E109 and M80.
Does the engine start?
Yes >> System is OK. (The malfunction is caused by improper connector connection.)
No >> GO TO 4
4.CHECK GROUND CIRCUIT FOR DONGLE UNIT
Check continuity between dongle unit terminal 1 and ground.
OK or NG
OK >> GO TO 5
NG >> Repair harness.
SEL292W
Continuity should exist.
SIIA1241E

BL-96
NATS (NISSAN ANTI-THEFT SYSTEM)
5. CHECK INTERFACE CIRCUIT
1. Check continuity between IMMU terminal 2and dongle unit ter-
minal 7.
2. Check continuity between IMMU terminal 2 and ground.
OK or NG
OK >> Dongle unit is malfunctioning.
1. Replace dongle unit.
2. Perform initialization with CONSULT-II. For the initial-
ization procedure, refer to “CONSULT-II operation manual NATS.
NG >> Repair harness.
Diagnostic Procedure 5EIS001TB
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 IMMU-ECM”:
Registered ID of IMMU is in discord with that of ECM.
Is CONSULT-II screen displayed as above?
Yes >> GO TO 2
No >> GO TO BL-89, "
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”.
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. B )
No >>
●ECM is malfunctioning.
●Replace ECM. Ref. part No. B
●Perform initialization with CONSULT-II.
●For initialization, refer to “CONSULT-II operation manual NATS”. Continuity should exist.
Continuity should not exist.
SIIA1242E
SEL958W
SEL297W

NATS (NISSAN ANTI-THEFT SYSTEM)
BL-97
C
D
E
F
G
H
J
K
L
MA
B
BL
Diagnostic Procedure 6EIS001TC
“SECURITY INDICATOR LAMP DOES NOT LIGHT UP”
1.CHECK FUSE
Check 10A fuse [No. 28, located in the fuse block (J/B)].
Is 10A fuse OK?
Ye s > > G O T O 2
No >> Replace fuse.
2.CHECK SECURITY INDICATOR LAMP
1. Install 10A fuse.
2. Perform initialization with CONSULT-II.
For initialization, refer to “CONSULT-II Operation Manual NATS”.
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 light up.
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 2 and ground.
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 > > G O T O 5
No >> Replace security indicator lamp.Battery voltage should exist.
SIIA1243E

BL-98
NATS (NISSAN ANTI-THEFT SYSTEM)
5. CHECK IMMU FUNCTION
1. Connect IMMU connector.
2. Disconnect security indicator lamp connector.
3. Check continuity between IMMU terminal 5 and ground.
OK or NG
OK >> Check harness for open or short between security indi-
cator lamp and IMMU.
NG >>
●IMMU is malfunctioning.
●Replace IMMU. Ref. part No. A
●Perform initialization with CONSULT-II.
●For initialization, refer to “CONSULT-II operation man-
ual NATS”.
Diagnostic Procedure 7EIS001TD
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-89, "
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 “LOCK MODE”.)
No >> GO TO 3
3. CHECK IMMU ILLUSTRATION
Check IMMU installation. Refer to BL-100, "
How to Replace NATS IMMU" .
OK or NG
OK >> GO TO 4
NG >> Reinstall IMMU correctly.Continuity should exist intermittently.
SIIA1244E
SEL960W