NISSAN X-TRAIL 2003 Service Repair Manual

NATS (NISSAN ANTI-THEFT SYSTEM)
BL-117
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NATS SELF-DIAGNOSTIC RESULTS ITEM CHART
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-121
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-122
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-125
CHAIN OF IMMU-KEYNATS MAL-
FUNCTION
P1614IMMU cannot receive the key ID signal.BL-126
ID DISCORD, IMM-ECMNATS MAL-
FUNCTION
P1611The result of ID verification between IMMU and ECM is
NG. System initialization is required.BL-127
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-129
DON'T ERASE BEFORE CHECK-
ING ENG DIAG—All engine trouble codes except NATS trouble code has
been detected in ECM.BL-118

BL-118
NATS (NISSAN ANTI-THEFT SYSTEM)

Work FlowEIS008F4
SEL729WE

NATS (NISSAN ANTI-THEFT SYSTEM)
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Trouble DiagnosesEIS008F5
SYMPTOM MATRIX CHART 1
Self-diagnosis related item
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-121
)ECM B
CHAIN OF ECM-IMMUPROCEDURE 2
(BL-122
)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-125
)Unregistered key D
IMMU A
CHAIN OF IMMU-KEYPROCEDURE 4
(BL-126
)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-127
)System initialization has
not yet been completed.F
ECM B

BL-120
NATS (NISSAN ANTI-THEFT SYSTEM)

*: When NATS detects trouble, the security indicator lights up while ignition key is in the “ON” position.
*: 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.

Security indicator
lighting up*

Engine cannot be
startedLOCK MODEPROCEDURE 7
(BL-129 )LOCK MODEWhen the starting opera-
tion is carried out five or
more times consecu-
tively under the follow-
ing conditions, NATS will
shift the mode to one
which prevents the
engine from being
started.

Unregistered ignition
key is used.

IMMU or ECM's mal-
functioning.

MIL staying ON

Security indicator
lighting up*DON'T ERASE
BEFORE CHECKING
ENG DIAGWORK FLOW
(BL-118 )Engine trouble data and
NATS trouble data have
been detected in ECM— 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

NATS (NISSAN ANTI-THEFT SYSTEM)
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SYMPTOM MATRIX CHART 2
Non self-diagnosis related item
DIAGNOSTIC SYSTEM DIAGRAM
Diagnostic Procedure 1EIS008F6
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”.
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-128
)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-130
)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
SEL152X

BL-122
NATS (NISSAN ANTI-THEFT SYSTEM)

Diagnostic Procedure 2EIS008F7
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 shown in figure?
Yes >> GO TO 2
No >> GO TO BL-119, "
SYMPTOM MATRIX CHART 1" .
2. CHECK POWER SUPPLY CIRCUIT FOR IMMU
1. Turn ignition switch OFF.
2. Disconnect NATS IMMU connector.
3. Check voltage between NATS IMMU harness connector E109 terminal 8 (W/L) and ground with CON-
SULT-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)

20A fuse (No. 43, located in the fusible link and fuse
box) – (Diesel engine)

Harness for open or short between fuse and NATS
IMMU connector. Ref. Part No. C1
3. CHECK IGN SW. ON SIGNAL
1. Turn ignition switch ON.
2. Check voltage between NATS IMMU harness connector E109 terminal 7 (G) 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 NATS
IMMU connector. Ref. part No. C2
SEL292W
8 (W/L) – Ground : Battery voltage.
PIIA8746E
7 (G) – Ground : Battery voltage.
PIIA8747E

NATS (NISSAN ANTI-THEFT SYSTEM)
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4. CHECK GROUND CIRCUIT FOR IMMU
1. Turn ignition OFF.
2. Check harness continuity between NATS IMMU harness connector E109 terminal 4 (B) 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 harness connector M118 terminal 88 (Gasoline engine) or 112
(Diesel engine) and NATS IMMU harness connector E109 terminal 1.
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 88 (Gasoline engine), 112 (Diesel engine) or NATS IMMU h termi-
nal 1 and ground.
OK or NG
OK >> GO TO 7.
NG >> Check the following.

Communication line is short-circuited with battery
voltage line or ignition switch ON line

Repair harness or connectors Ref. part No. C4 4 (B) – Ground : Continuity should exist.
PIIA8748E
88 (SB) – 1 (BR/Y) : Continuity should exist.
112 (SB) – 1 (BR/Y) : Continuity should exist.
PIIB0379E
88 (SB) – Ground : Approx. 0V
112 (SB) – Ground : Approx. 0V
1 (BR/Y) – Ground : Approx. 0V
PIIB0380E

BL-124
NATS (NISSAN ANTI-THEFT SYSTEM)

7. CHECK COMMUNICATION LINE GROUND SHORT CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between ECM terminal 88 (Gasoline engine), 112 (Diesel engine) or NATS IMMU termi-
nal 1 and ground.
OK or NG
OK >> GO TO 8.
NG >> Check the following.

Communication line is short-circuited with ground line

Repair harness or connectors Ref. part No. C4
8. SIGNAL FROM ECM TO IMMU CHECK
1. Connect NATS IMMU connector.
2. Check voltage between NATS IMMU harness connector E109 terminal 3 (B/Y) and ground with analogue
tester.
OK or NG
OK >> NATS IMMU is malfunctioning.

Replace NATS 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”. 88 (SB) – Ground : Continuity should exist.
112 (SB) – Ground : Continuity should exist.
1 (BR/Y) – Ground : Continuity should exist.
PIIB0381E
3 (B/Y) - Ground:
Before turning ignition switch “ON”
: Voltage: Battery voltage
Just after turning ignition switch “ON”
: Pointer of tester should move.
PIIA8758E

NATS (NISSAN ANTI-THEFT SYSTEM)
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Diagnostic Procedure 3EIS008F8
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 shown in the figure?
Ye s > > G O T O 2 .
No >> GO TO BL-119, "
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?
Yes >> Ignition key ID was unregistered. Ref. part No. D
No >> NATS 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

BL-126
NATS (NISSAN ANTI-THEFT SYSTEM)

Diagnostic Procedure 4EIS008F9
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 shown in figure?
Yes >> GO TO 2.
No >> GO TO BL-119, "
SYMPTOM MATRIX CHART 1" .
2. CHECK NATS IGNITION KEY ID CHIP
Start engine with another registered NATS ignition key.
Does the engine start?
Yes >> 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
NATS IMMU is malfunctioning.
–Replace NATS 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
1. Turn ignition switch OFF.
2. Check continuity between dongle unit harness connector M80 terminal 1 (B) and ground.
OK or NG
OK >> GO TO 5.
NG >> Repair harness.
SEL292W
1 (B) – Ground : Continuity should exist.
PIIA8752E