NISSAN NAVARA 2005 Repair Workshop Manual

THEFT WARNING SYSTEM
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2.CHECK HOOD SWITCH
1. Turn ignition switch OFF.
2. Disconnect hood switch connector.
3. Check continuity between hood switch terminal 1 and 2.
OK or NG
OK >> GO TO 3.
NG >> Replace hood switch.
3.CHECK HOOD SWITCH CIRCUIT
1. Disconnect IPDM E/R connector.
2. Check continuity between hood switch connector E51 terminals
1 and IPDM E/R connector E17 terminals 41.
3. Check continuity between hood switch connector E51 terminal 1
and ground.
OK or NG
OK >> GO TO 4.
NG >> Repair or replace harness.
4.CHECK GROUND CIRCUIT
Check continuity between hood switch connector E51 terminal 2 and
ground.
OK or NG
OK >> GO TO 5.
NG >> Repair or replace harness.
Terminals Hood switch condition Continuity
12Pressed No
Released Yes
PIIA2498E
1 – 41 : Continuity should exist.
1 – Ground : Continuity should not exist.
MIIB0869E
2 – Ground : Continuity should exist.
PIIA8127E

BL-168
THEFT WARNING SYSTEM
5.CHECK IPDM E/R OUTPUT SIGNAL
1. Connect IPDM E/R connector.
2. Check voltage between IPDM E/R terminal 41 and ground.
OK or NG
OK >> Check harness condition.
NG >> Replace IPDM E/R.
Diagnostic Procedure 2EIS00DC9
SECURITY INDICATOR LAMP CHECK
1.SECURITY INDICATOR LAMP ACTIVE TEST
With CONSULT-II
Check "THEFT IND” in "ACTIVE TEST" mode with CONSULT-II.
Without CONSULT-II
1. Turn ignition switch OFF.
2. Check voltage between combination meter (security indicator
lamp) connector M23 terminal 39 and ground.
OK or NG
OK >> Security indicator lamp is OK.
NG >> GO TO 2.41 – Ground : Battery voltage
MIIB0868E
PIIA7005E
ConnectorTerminal Security indi-
cator lamp
conditionVo l ta g e (V )
(Approx.)
(+) (-)
M23 39 GroundIlluminated 0
Not illumi-
natedBattery volt-
age
MIIB0870E

THEFT WARNING SYSTEM
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2.CHECK HARNESS CONTINUITY
1. Turn ignition switch OFF.
2. Disconnect BCM and combination meter connector.
3. Check continuity between BCM connector M42 terminal 23 and
combination meter connector M23 terminal 39.
4. Check continuity between BCM connector M42 terminal 23 and
ground.
OK or NG
OK >> Check the following.
l10Afuse[No.19,locatedinfuseblock(J/B)]
lHarness for open or short between combination meter and fuse
NG >> Repair or replace harness.
Diagnostic Procedure 3EIS00DCB
THEFT WARNING HORN ALARM CHECK
1.CHECK HORN OPERATION
Check if horn sounds with horn switch.
Does horn operate?
Yes >> Check harness for open or short between IPDM E/R and horn relay.
No >> Check horn circuit. Refer toWW-59, "
HORN".
Diagnostic Procedure 4EIS00DCC
THEFT WARNING TURN SINGAL LAMP ALARM CHECK
1.CHECK THEFT WARNING TURN SIGNAL LAMP ALARM OPERATION
Check if turn signal lamps operate with combination switch and hazard switch.
DoturnsignallampscomeonwhenturningswitchON?
Yes >> Turn signal lamps alarm is OK.
No >> Check turn signal lamps system. Refer toLT- 9 7 , "
TURN SIGNAL AND HAZARD WARNING
LAMPS". 23 – 39 : Continuity should exist.
23 – Ground : Continuity should not exist.
MIIB0871E

BL-170
NATS(NISSAN ANTI-THEFT SYSTEM)
NATS(NISSAN ANTI-THEFT SYSTEM)
PFP:28591
Component Parts and Harness Connector LocationEIS00DAO
NOTE:
If customer reports a “No start” condition, request ALL KEYS to be brought to an NISSAN dealer in
case of a NATS malfunction.
1. Fuse block (J/B) fuse layout 2. Fuse and fusible link box 3. IPDM fuse layout
4. BCM M42, M43, M44
(View with instrument lower
panel LH removed)5. NATS antenna amp M37 6. a: Security indicator lamp
b: Combination meter M23
7. ECM E20 (Engine room)
MIIB1067E

NATS(NISSAN ANTI-THEFT SYSTEM)
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System DescriptionEIS00DAP
NATS (Nissan Anti-Theft System) has the following immobilizer functions:
lSince only NATS ignition keys, whose ID No. s have been registered into the ECM and IMMU of NATS,
allow the engine to run, a vehicle operation without a registered key in NATS is prevented by NATS.
That is to say, NATS will immobilize the engine if someone tries to start it without the registered key of
NATS.
lThis version of NATS has dongle unit to improve its anti-theft performance (RHD models). Dongle unit has
its own ID which is registered into NATS IMMU. So if dongle unit is replaced, initialization must be per-
formed.
lWhen malfunction of dongle unit is detected:
The security indicator lamp illuminates for about 15 minutes after ignition switch is turned to ON.
–When dongle unit has a malfunction and the indicator lamp is illuminated, engine cannot be started. How-
ever engine can be started only one time when security indicator lamp turns off in about 15 minutes after
ignition switch is turned to ON.
lAll of the originally supplied ignition key IDs have been NATS registered in NATS.
If the vehicle owner requests, a maximum of four key IDs can be registered into the NATS components.
lThe security indicator blinks when the ignition switch is in “OFF” or “ACC” position. Therefore, NATS
warns outsiders that the vehicle is equipped with the anti-theft system.
lWhen NATS detects malfunction, the security indicator lamp lights up as follows.
lNATS trouble diagnoses, system initialization and additional registration of other NATS ignition key IDs
must be performed using CONSULT-II hardware and CONSULT-II NATS software.
Regarding the procedures of NATS initialization and NATS ignition key ID registration, refer to CONSULT-
II operation manual, NATS.
lWhen servicing a malfunction of the NATS (indicated by lighting up of Security Indicator Lamp) or
registering another NATS ignition key ID no., it may be necessary to re-register original key identi-
fication. Therefore, be sure to receive ALL KEYS from vehicle owner.
Condition IGN ON andWith dongle Without dongle
Security indicator Security indicator
NATS malfunction (except dongle unit) is
detected1. 6 times blinking
2. Staying ON after ignition switch is turned ON.Staying ON
Only malfunction of dongle unit is
detected.Staying ON for about 15 minutes after ignition
switch is turned ON.—
Malfunction of NATS and engine related
parts are detected.1. 6 times blinking
2. Staying ON after ignition switch is turned ON.Staying ON
Only engine related part malfunction is
detected.——
Just after initialization of NATS 6 times blinking —

BL-172
NATS(NISSAN ANTI-THEFT SYSTEM)
System Composition
EIS00DAQ
The immobilizer function of the NATS consists of the following:
lNATS ignition key
lMechanical key (with Intelligent Key system)
lNATS antenna amp. located in the ignition key cylinder
lBCM
lEngine control module (ECM)
lDongle unit (RHD models)
lSecurity indicator
NOTE:
The communication between ECM, BCM and/or Intelligent Key unit uses the CAN communication sys-
tem.
ECM Re-communicating FunctionEIS00DAR
Performing following procedure can automatically perform re-communication of ECM and BCM or Intelligent
Key unit, but only when the ECM has been replaced with a new one (*1).
*1: New one means a virgin ECM which has never been energized on-board.
(In this step, initialization procedure by CONSULT-II is not necessary)
NOTE:
lWhen registering new Key IDs or replacing the ECM other than brand new, refer to CONSULT-II
Operation Manual NATS.
lIf multiple keys are attached to the key holder, separate them before work.
lDistinguish keys with unregistered key ID from those with registered ID.
1. Install ECM.
2. Usingaregisteredkey(*2),turnignitionswitchto“ON”.
*2: To perform this step, use the key (except for card plate key) that has been used before performing
ECM replacement.
3. Maintain ignition switch in “ON” position for at least 5 seconds.
4. Turn ignition switch to “OFF”.
5. Start engine.
If engine can be started, procedure is completed.
If engine cannot be started, refer to CONSULT-II Operation Manual NATS and initialize control unit.
SIIA1246E

NATS(NISSAN ANTI-THEFT SYSTEM)
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Wiring Diagram — NATS —EIS00DAS
MIWA0480E

BL-174
NATS(NISSAN ANTI-THEFT SYSTEM)
Terminals and Reference Value for BCM
EIS00DAW
CONSULT-II FunctionEIS00DAX
CONSULT-II INSPECTION PROCEDURE
1. Turn ignition switch OFF.
2. Insert NATS program card into CONSULT-II.
3. Connect CONSULT-II and CONSULT-II CONVERTER to data
link connector.
4. Turn ignition switch ON.
5. Touch “START”.
6. Touch “OTHER”.
Te r -
minalWire
ColorItem ConditionVoltag e [V]
(Approx.)
1 BR NATS antenna amp. Ignition switch (OFF®ON)Just after turning ignition switch “ON”:
Pointer of tester should move.
2 GR NATS antenna amp. Ignition switch (OFF®ON)Just after turning ignition switch “ON”:
Pointer of tester should move.
3 Y Ignition switch (ON or START) Ignition switch (ON or START position) Battery voltage
21 P CAN-L — —
22 L CAN-H — —
23 G Security indicator lampGoes OFF®illuminates (Every 2.6
seconds)Battery voltage®0
41 Y Power source (Fuse) — Battery voltage
55 B Ground — 0
57 W Power source (Fusible link) — Battery voltage
Program card : NATS (AEN04A-1)
BBIA0538E
PBR455D
PIIB0900E

NATS(NISSAN ANTI-THEFT SYSTEM)
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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