2005 NISSAN NAVARA ignition

NATS(NISSAN ANTI-THEFT SYSTEM)
BL-175
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7. Select “NATS V.5.0”.
If “NATS V5.0” is not indicated, go toGI-50, "
CONSULT-II Data
Link Connector (DLC) Circuit".
8. 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
*: When replace ECM, refer toBL-172, "ECM Re-communicating Function".
NOTE:
lWhen any initialization is performed, all ID previously registered will be erased and all NATS ignition keys
must be registered again.
lThe engine cannot be started with an unregistered key. In this case, the system will show “DIFFERENCE
OF KEY” or “LOCK MODE” as a self-diagnostic result on the CONSULT-II screen.
lIn 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.
PIIA9327E
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/ BCM/ ECM*]
SELF-DIAG RESULTSDetected items (screen terms) are as shown in the chart.
Refer toBL-176, "
NATS SELF-DIAGNOSTIC RESULTS ITEM CHART".

BL-176
NATS(NISSAN ANTI-THEFT SYSTEM)
HOW TO READ SELF-DIAGNOSTIC RESULTS
NATS SELF-DIAGNOSTIC RESULTS ITEM CHART
PIIA1124E
Detected items
[NATS program card screen terms]P No. Code
(Self-diagnostic
result of
“ENGINE”)Malfunction is detected when.....Reference
page
CHAIN OF ECM-IMMU
[P1612]NATS MAL-
FUNCTION
P1612Communication impossible between ECM and BCM
In rare case, “CHAIN OF ECM-IMMU” might be stored
during key registration procedure, even if the system is
not malfunctioning.BL-179
DIFFERENCE OF KEY
[P1615]NATS MAL-
FUNCTION
P1615BCM can receive the key ID signal but the result of ID
verification between key ID and BCM is NG.BL-181
CHAIN OF IMMU-KEY
[P1614]NATS MAL-
FUNCTION
P1614BCM cannot receive the key ID signal.BL-181
ID DISCORD, IMM-ECM
[P1611]NATS MAL-
FUNCTION
P1611The result of ID verification between BCM and ECM is
NG. System initialization is required.BL-184
LOCK MODE
[P1610]NATS 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.
lUnregistered ignition key is used.
lBCM or ECM’s malfunctioning.BL-187
ECM
[P1616]ECM
P1616ECM ROM is malfunctioning.EC-269
DON'T ERASE BEFORE CHECK-
ING ENG DIAG—All engine trouble codes except NATS trouble code has
been detected in ECM.BL-177

BL-178
NATS(NISSAN ANTI-THEFT SYSTEM)
Trouble Diagnoses
EIS00DB0
SYMPTOM MATRIX CHART 1
Self-diagnosis related item
*1: When NATS detects trouble, the security indicator lights up while ignition key is in the “ON” position.
SYMPTOM MATRIX CHART 2
Non self-diagnosis related item
*: CONSULT-II self-diagnostic results display screen “no malfunction is detected”.SYMPTOMDisplayed “SELF-DIAG
RESULTS” on CON-
SULT-II screen.DIAGNOSTIC PROCE-
DURE
(Reference page)SYSTEM
(Malfunctioning part or mode)
lSecurity indicator
lighting up*1
lEngine cannot be
startedCHAIN OF ECM-IMMU
[P1612]PROCEDURE 1
(BL-179
)In rare case, “CHAIN OF ECM-IMMU” might be stored
during key registration procedure, even if the system is
not malfunctioning.
Open circuit in battery voltage line of BCM circuit
Open circuit in ignition line of BCM circuit
Open circuit in ground line of BCM circuit
Open or short circuit between BCM and ECM communi-
cation line
ECM
BCM
DIFFERENCE OF KEY
[P1615]PROCEDURE 2
(BL-181
)Unregistered key
BCM
CHAIN OF IMMU-KEY
[P1614]PROCEDURE 3
(BL-181
)Malfunction of key ID chip
Communication line between ANT/ AMP and BCM:
Open circuit or short circuit of battery voltage line or
ground line
Open circuit in power source line of ANT/ AMP circuit
Open circuit in ground line of ANT/ AMP circuit
NATS antenna amp.
BCM
ID DISCORD, IMM-
ECM
[P1611]PROCEDURE 4
(BL-184
)System initialization has not yet been completed.
ECM
ECM
[P1616]EC-269, "
DTC P1616
ECM"ECM
lSecurity indicator
lighting up*1
lEngine cannot be
startedLOCK MODE
[P1610]PROCEDURE 6
(BL-187)When 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.
lUnregistered ignition key is used.
lBCM or ECM’s malfunctioning.
Security indicator
lighting up*
1
DON'T ERASE
BEFORE CHECKING
ENG DIAGWORK FLOW
(BL-177
)Engine trouble data and NATS trouble data have been
detected in ECM
SYMPTOMDIAGNOSTIC PROCEDURE
(Reference page)SYSTEM
(Malfunctioning part or mode)
Security indicator does not light up*.PROCEDURE 5
(BL-185
)Security indictor.
Open circuit between Fuse and BCM
BCM

NATS(NISSAN ANTI-THEFT SYSTEM)
BL-179
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Diagnostic Procedure 1EIS00DB1
Self-diagnostic results:
“CHAIN OF ECM-IMMU” displayed on CONSULT-II screen
First perform the “SELF-DIAG RESULTS” in “BCM” with CONSULT-II, then perform the trouble diagno-
sis of malfunction system indicated “SELF-DIAG RESULTS” of “BCM”. Refer toBCS-16, "
CAN Com-
munication Inspection Using CONSULT-II (Self-Diagnosis)".
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?
Ye s > > G O T O 2 .
No >> GO TOBL-178, "
SYMPTOM MATRIX CHART 1".
2.CHECK POWER SUPPLY CIRCUIT FOR BCM
1. Turn ignition switch OFF.
2. Disconnect BCM connector.
3. Check voltage between BCM and ground.
OK or NG
OK >> GO TO 3.
NG >> Check the following.
l50A fusible link (letterG, located in the fuse and fus-
ible link box)
l10A fuse [No.21, located in the fuse block (J/B)]
lHarness for open or short between fusible link and BCM
lHarness for open or short between fuse and BCM
3.CHECK IGNITION SWITCH ON SIGNAL
1. Turn ignition switch ON.
2. Check voltage between BCM connector M42 terminal 3 and ground.
OK or NG
OK >> GO TO 4.
NG >> Check the following.
l10A fuse [No. 1, located in the fuse block (J/B)]
lHarness for open or short between fuse and BCM
PIIA1260E
ConnectorTerminals
Voltag e [V]
(Approx.)
(+) (-)
M42 41
Ground Battery voltage
M44 57
MIIB0902E
3 – Ground : Battery voltage
MIIB0899E

BL-180
NATS(NISSAN ANTI-THEFT SYSTEM)
4.CHECK GROUND CIRCUIT FOR BCM
1. Turn ignition switch OFF.
2. Check continuity between BCM connector M44 terminal 55 and ground.
OK or NG
OK >> GO TO 5.
NG >> Repair or replace harness.
5.REPLACE BCM
1. Replace BCM
2. Perform initialization with CONSULT-II.
For initialization, refer to “CONSULT-II Operation Manual NATS”.
Doestheenginestart?
Yes >> BCM is malfunctioning.
lReplace BCM.
lPerform initialization with CONSULT-II
lFor initialization, refer to “CONSULT-II Operation Manual NATS”
No >> ECM is malfunctioning.
lReplace ECM.
lPerform initialization or re-communicating function
lFor initialization, refer to “CONSULT-II Operation Manual NATS”
lFor re-communicating function, refer toBL-172, "ECM Re-communicating Function"
55 – Ground : Continuity should exist.
MIIB0824E

NATS(NISSAN ANTI-THEFT SYSTEM)
BL-181
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Diagnostic Procedure 2EIS00DB2
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 figure?
Ye s > > G O T O 2 .
No >> GO TOBL-178, "
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 malfunctions, CONSULT-II
shows 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.
No >> BCM is malfunctioning.
lReplace BCM.
lPerform initialization with CONSULT-II
lFor initialization, refer to “CONSULT-II Operation
Manual NATS”
Diagnostic Procedure 3EIS00DB3
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?
Ye s > > G O T O 2 .
No >> GO TOBL-178, "
SYMPTOM MATRIX CHART 1".
2.CHECK NATS ANTENNA AMP. INSTALLATION
Check NATS antenna amp. installation. Refer toBL-188, "
Removal and Installation of NATS Antenna Amp".
OK or NG
OK >> GO TO 3.
NG >> Reinstall NATS antenna amp. correctly.
PIIA1261E
SEL297W
PIIA1263E

BL-182
NATS(NISSAN ANTI-THEFT SYSTEM)
3.CHECK NATS IGNITION KEY ID CHIP
Start engine with another registered NATS ignition key.
Doestheenginestart?
Yes >> Ignition key ID chip is malfunctioning.
lReplace the ignition key
lPerform initialization with CONSULT-II
For initialization, refer to “CONSULT-II Operation Manual NATS”
No >> GO TO 4.
4.CHECK POWER SUPPLY FOR NATS ANTENNA AMP.
1. Turn ignition switch “OFF”.
2. Check voltage between NATS antenna amp. connector M37 terminal 1 and ground.
OK or NG
OK >> GO TO 5.
NG >> Check the following.
l20A fuse [No. 53, located in IPDM E/R]
lHarness for open or short between fuse and NATS
antenna amp.
5.CHECK NATS ANTENNA AMP. SIGNAL LINE- 1
Check voltage between NATS antenna amp. connector M37 terminal 2 and ground with analogue tester.
OK or NG
OK >> GO TO 6.
NG >>
lCheck harness for open or short between NATS
antenna amp. and BCM.
NOTE:
If harness is OK, replace BCM, perform initialization
with CONSULT-II. For initialization, refer to “CONSULT-II Operation Manual NATS”. 1 – Ground : Battery voltage.
PIIB4650E
Before turning ignition switch “ON”
Voltage: Approx. 0V
Just after turning ignition switch “ON”
: Pointer of tester should move.
PIIB4651E

NATS(NISSAN ANTI-THEFT SYSTEM)
BL-183
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6.CHECK NATS ANTENNA AMP. SIGNAL LINE- 2
Check voltage between NATS antenna amp. connector M37 terminal 4 and ground with analogue tester.
OK or NG
OK >> GO TO 7.
NG >>
lCheck harness for open or short between NATS
antenna amp. and BCM.
NOTE:
If harness is OK, replace BCM, perform initialization
with CONSULT-II. For initialization, refer to “CONSULT-II Operation Manual NATS”.
7.CHECK NATS ANTENNA AMP. GROUND LINE CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect NATS antenna amp. connector.
3. Check continuity between NATS antenna amp. connector M37 terminal 3 and ground.
OK or NG
OK >> NATS antenna amp. is malfunctioning.
NG >> Repair or replace NATS antenna amp. ground circuit.Before turning ignition switch “ON”
Voltage: Approx. 0V
Just after turning ignition switch “ON”
: Pointer of tester should move.
PIIB4652E
3 – Ground : Continuity should exist.
PIIB4653E