engine NISSAN TIIDA 2007 Service Repair Manual

SEC-3
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NATS (NISSAN ANTI-THEFT SYSTEM) ...........84
System Diagram ......................................................84
System Description .................................................84
Component Parts Location ......................................85
Component Description ..........................................86
DIAGNOSIS SYSTEM (BCM) ............................87
COMMON ITEM .........................................................87
COMMON ITEM : CONSULT-III Function (BCM -
COMMON ITEM) .....................................................
87
IMMU ..........................................................................87
IMMU : CONSULT-III Function (BCM - IMMU) .......87
THEFT ALM ...............................................................88
THEFT ALM : CONSULT-III Function (BCM -
THEFT ALM) ...........................................................
88
COMPONENT DIAGNOSIS .........................90
U1000 CAN COMM CIRCUIT .............................90
Description ..............................................................90
DTC Logic ...............................................................90
Diagnosis Procedure ...............................................90
U1010 CONTROL UNIT (CAN) ..........................91
DTC Logic ...............................................................91
Diagnosis Procedure ...............................................91
Special Repair Requirement ...................................91
B2190, P1614 NATS ANTENNA AMP. ..............92
Description ..............................................................92
DTC Logic ...............................................................92
Diagnosis Procedure ...............................................92
B2191, P1615 DIFFERENCE OF KEY ...............94
Description ..............................................................94
DTC Logic ...............................................................94
Diagnosis Procedure ...............................................94
B2192, P1611 ID DISCORD, IMMU-ECM ..........95
Description ..............................................................95
DTC Logic ...............................................................95
Diagnosis Procedure ...............................................95
B2193, P1612 CHAIN OF ECM-IMMU ...............97
Description ..............................................................97
DTC Logic ...............................................................97
Diagnosis Procedure ...............................................97
B2196 DONGLE NG ...........................................98
Description ...............................................................98
DTC Logic ................................................................98
Diagnosis Procedure ...............................................98
P1610 LOCK MODE .........................................99
Description ...............................................................99
DTC Logic ................................................................99
Diagnosis Procedure ...............................................99
POWER SUPPLY AND GROUND CIRCUIT ..100
BCM .........................................................................100
BCM : Diagnosis Procedure ..................................100
VEHICLE SECURITY INDICATOR .................101
Description .............................................................101
Component Function Check ................................101
Diagnosis Procedure .............................................101
SECURITY SYSTEM PRE-WIRING ................103
Wiring Diagram - SECURITY SYSTEM PRE-WIR-
ING - ......................................................................
103
ECU DIAGNOSIS .......................................106
BCM (BODY CONTROL MODULE) ...............106
Reference Value ....................................................106
Wiring Diagram - NATS - .......................................106
Fail Safe ................................................................111
DTC Inspection Priority Chart .............................113
DTC Index .............................................................113
IPDM E/R (INTELLIGENT POWER DISTRI-
BUTION MODULE ENGINE ROOM) ..............
114
Reference Value ....................................................114
Fail Safe ................................................................114
DTC Index .............................................................115
SYMPTOM DIAGNOSIS ............................116
VEHICLE SECURITY SYSTEM SYMPTOMS .116
Symptom Table .....................................................116
NATS (NISSAN ANTI-THEFT SYSTEM)
SYMPTOMS ....................................................
117
Symptom Table .....................................................117
ON-VEHICLE MAINTENANCE ..................118
PRE-INSPECTION FOR DIAGNOSTIC ..........118
Basic Inspection ....................................................118

INSPECTION AND ADJUSTMENT
SEC-7
< BASIC INSPECTION >[WITH INTELLIGENT KEY SYSTEM]
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INSPECTION AND ADJUSTMENT
ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT
ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Special Repair Re-
quirement
INFOID:0000000001404031
Refer to the CONSULT-III Operation Manual-NATS.
ECM RE-COMMUNICATING FUNCTION
ECM RE-COMMUNICATING FUNCTION : DescriptionINFOID:0000000001404032
Performing following procedure can automatically perform re-communication of ECM and BCM, but only when
the ECM has been replaced with a new one (*1).
*1: New one means an ECM which has never been energized on-board.
(In this step, initialization procedure by CONSULT-III is not necessary)
NOTE:
When registering new Key IDs or replacing the ECM that is not brand new, refer to CONSULT-III Oper-
ation Manual.
If multiple keys are attached to the key holder, separate them before work.
Distinguish keys with unregistered key ID from those with registered ID.
ECM RE-COMMUNICATING FUNCTION : Special Repair RequirementINFOID:0000000001404033
1.PERFORM ECM RE-COMMUNICATING FUNCTION
1. Install ECM.
2. Using a registered key (*2), turn ignition switch to “ON”.
*2: To perform this step, use the 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.
Can engine be started?
YES >> Procedure is completed.
NO >> Initialize control unit. Refer to CONSULT-III Operation Manual NATS.

SEC-8
< FUNCTION DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
FUNCTION DIAGNOSIS
INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
System DiagramINFOID:0000000001404034
System DescriptionINFOID:0000000001404035
INPUT/OUTPUT SIGNAL CHART
Intelligent Key Unit
IPDM E/R
BCM
SYSTEM DESCRIPTION
 The engine start function of Intelligent Key system is a system that makes it possible to start and stop the
engine without using the key. It verifies the electronic ID using two-way communications when pressing the
ignition knob switch while carrying the Intelligent Key, which operates based on the results of electronic ID
verification for Intelligent Key using two-way communications between the Intelligent Key and the vehicle.
NOTE:
The driver should carry the Intelligent Key at all times.
Switch/Input signalInput signal to
Intelligent Key unit Intelligent Key unit
functionActuator/Output signal
Key switchMechanical key
(insert/remove)
Engine start function KEY warning lamp/buzzer
 Steering lock unit
 Starter relay request (to IPDM E/
R)
 Inside key antenna
(Instrument center, console, rear
seat)
 Key interlock solenoid Ignition knob switchIgnition knob
(push/release)
Steering lock unitSteering lock
(lock/unlock)
Inside key antenna
(Instrument center, console, rear
seat)Intelligent key
(inside antenna detection
area or not.)
Switch/Input signalInput signal to
IPDM E/R IPDM E/R function Actuator/Output signal
Park/neutral position switch (only
for A/T models)P,N range Engine start function Starter relay
 Starter motor
Switch/Input signalInput signal to
BCM BCM function Actuator/Output signal
Key switchMechanical key
(insert/remove)Engine start function Inside key antenna
(Instrument center, console, rear
seat)
MIIB0785E

INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
SEC-9
< FUNCTION DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
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 Intelligent Key has 2 IDs (for Intelligent Key and for NATS). It can perform the door lock/unlock operation and
the engine start operation when the registered Intelligent Key is carried.
 When the Intelligent Key battery is discharged, it can be used as emergency back-up by inserting the
mechanical key set in the Intelligent Key to the ignition key cylinder. At that time, perform the NATS ID verifi-
cation. If it is used when the Intelligent Key is carried, perform the Intelligent Key ID verification.
 If the ID is successfully verified, and when the ignition knob switch is pressed, steering lock will be released
and initiating the engine will be possible.
 The door lock/unlock operation can be performed when the Intelligent Key battery is discharged, by operat-
ing the driver door key cylinder using the mechanical key set in the Intelligent Key.
 Up to 4 Intelligent Keys can be registered (including the standard Intelligent Key) on request from the owner.
NOTE:
 Refer to XX-XX, "*****"
for any functions other than engine start function of Intelligent Key system.
PRECAUTIONS FOR INTELLIGENT KEY SYSTEM
In the Intelligent Key system, the transponder [the chip for NATS ID verification] is integrated into the
Intelligent Key. (For non-Intelligent Key systems, it is integrated into the mechanical key.) Therefore,
the mechanical key cannot perform the ID verification, and thus it cannot start the engine. Instead,
the NATS ID verification can be performed by inserting the mechanical key into the key cylinder, and
then it can start the engine.
OPERATION WHEN INTELLIGENT KEY IS CARRIED
1. When the ignition knob switch and brake switch are ON, and Intelligent Key unit is transmitting the request
signal to the Intelligent Key.
2. The Intelligent Key receives the request signal and transmits the Intelligent Key ID signal to the Intelligent
Key unit.
3. The Intelligent Key unit receives the Intelligent Key ID signal and verifies it with the registered ID.
4. Intelligent Key unit transmits the steering lock unlock signal to steering lock unit and turn on the key warn-
ing lamp (green) if the verification results are OK. (The detail of key warning lamp operation, refer to XX-
XX, "*****")
5. Release of the steering lock.
6. BCM transmits the starter request signal via CAN communication to IPDM E/R and turns the starter relay
in IPDM E/R ON if BCM judges that the engine start condition is satisfied.
7. IPDM E/R turns the starter control relay ON when receiving the starter request signal.
8. When shift position is in P or N position, battery power is supplied through the starter relay and operate
the starter motor and to start the cranking.
CAUTION:
If a malfunction is detected in the Intelligent Key system, the “KEY” warning lamp in the combina-
tion meter illuminates. At that time, the engine cannot be started.
OPERATION RANGE
Engine can be started when Intelligent Key is inside the vehicle. However, sometimes engine might not start
when Intelligent Key is on instrument panel or in glove box.
OPERATION WHEN MECHANICAL KEY IS USED
When the Intelligent Key battery is discharged, performs the NATS ID verification between the integrated tran-
sponder and BCM by inserting the mechanical key into the key cylinder, and then the engine can be started.
For details relating to starting the engine using mechanical key, refer to SEC-12, "
System Description".
STEERING LOCK OPERATION
Steering is locked by steering lock unit when ignition switch is in the OFF position (the ignition knob is
released) and key switch is OFF (key is removed from ignition key cylinder).
KEY INTERLOCK OPERATION (ONLY FOR M/T MODELS)
In case of a M/T vehicle is in motion and ignition is turned into LOCK position, steering lock unit causes a risk
by activating the steering lock actuator. The key interlock operation is designed to override the steering lock
system and prevent the situation mentioned above from occuring.
LOCK condition
When the following conditions are fulfilled, key interlock solenoid will be locked. (Steering lock inactive)
 1 second passes after ignition switch is in ON position and engine revolution speed goes above 500 rpm.
UNLOCK condition

SEC-10
< FUNCTION DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
When any of the following condition are fulfilled key interlock solenoid will be unlocked. (Steering lock active)
 When vehicle speed is below 4km/h (2mph) and the ignition switch is turned from ON to OFF.
 When vehicle speed is over 4km/h (2mph) but less than 10km/h (6mph) in LOCK condition, and 3 second
passes after the ignition switch is turned from ON to OFF.
Component Parts LocationINFOID:0000000001404036
Component DescriptionINFOID:0000000001404037
1. BCM M18, M19, M20
(view with glove box removed)2. Intelligent Key Unit M52 3. Steering lock solenoid M6
(bottom view of steering column)
4. Security indicator lamp M31 5. ECM E16 6. Intelligent key warning buzzer (driver side) D6
(LHD: view with front door finisher removed)
7. Intelligent key warning buzzer (driver
side) D6
(RHD: view with front door finisher
removed)8. Intelligent Key warning buzzer
(trunk) B82 (sedan)
(view with trunk finisher LH re-
moved)
ALKIA0844ZZ
Component Reference
Intelligent Key unitSEC-34
BCMXX-XX, "*****"

INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
SEC-11
< FUNCTION DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
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ECMHR16 (WITH EURO-OBD): XX-XX, "*****"
HR16 (WITHOUT EURO-OBD): XX-XX,
"*****"
MR18 (WITH EURO-OBD): XX-XX, "*****"
MR18 (WITHOUT EURO-OBD): XX-XX,
"*****"
K9K: XX-XX, "*****"
Steering lock unitSEC-23
Ignition knob switch, key switch and key lock solenoidXX-XX, "*****"
Inside key antennaXX-XX, "*****"
Security indicatorSEC-49
Component Reference

SEC-12
< FUNCTION DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
NATS (NISSAN ANTI-THEFT SYSTEM)
NATS (NISSAN ANTI-THEFT SYSTEM)
System DiagramINFOID:0000000001404038
System DescriptionINFOID:0000000001404039
INPUT/OUTPUT SIGNAL CHART
Intelligent Key Unit
BCM
SYSTEM DESCRIPTION
NATS (Nissan Anti-Theft System) has the following immobilizer functions:
 Engine immobilizer shows high anti-theft performance to prevent engine from starting by other than the
owner.
 Only a key with key ID registered in BCM and ECM can start engine, and shows high anti-theft performance
to prevent key from being copied or stolen.
 Security indicator always flashes with mechanical key removed condition (key switch: OFF) and ignition
knob released condition on LOCK position (ignition knob switch: OFF).
 Therefore, NATS warns outsiders that the vehicle is equipped with the anti-theft system. Refer to XX-XX,
"*****".
 If system detects malfunction, security indicator illuminates when ignition switch is turned to ON position.
 If the owner requires, ignition key ID or mechanical key ID can be registered for up to 4 keys.
 During trouble diagnosis or when the following parts have been replaced, and if mechanical key is added,
registration* is required.
*1: All keys kept by the owner of the vehicle should be registered with mechanical key.
-ECM
-BCM
LIIA2537E
Switch/Input signal Input signal to BCM BCM function Actuator/Output signal
Ignition knob switchIgnition knob
(push/release)
NATS  Steering lock unit Key switchMechanical key
(Insert/remove)
Steering lock unitSteering
(lock/unlock)
ECM Engine status signal
Switch/Input signal Input signal to BCM BCM function Actuator/Output signal
NATS antenna amp. Key ID
NATS Security indicator lamp
 Starter request
ECM Engine status signal

NATS (NISSAN ANTI-THEFT SYSTEM)
SEC-13
< FUNCTION DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
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- Mechanical key
- ABS actuator control unit
- EPS control unit
- IPDM E/R
 NATS trouble diagnosis, system initialization and additional registration of other mechanical key IDs must be
carried out using CONSULT-III hardware and SECURITY CARD.
When NATS initialization has been completed, the ID of the inserted mechanical key or mechanical key IDs
can be carried out.
 Possible symptom of NATS malfunction is “Engine cannot start”. In C11, the engine can be started with the
Intelligent Key system and NATS. Identify the possible causes according to “Work Flow”, Refer to SEC-4,
"Work Flow".
 If ECM other than Genuine NISSAN is installed, the engine cannot be started. For ECM replacement proce-
dure, refer to SEC-7, "
ECM RE-COMMUNICATING FUNCTION : Description".
PRECAUTIONS FOR KEY REGISTRATION
 The key registration is a procedure that erases the current NATS ID once, and then re-registers a new ID.
Therefore the registered Intelligent Key is necessary for this procedure. Before starting the registration oper-
ation collect all registered Intelligent Keys from the customer.
 The NATS ID registration is the procedure that registers the ID stored into the transponder (integrated in
mechanical key) to BCM.
The Intelligent Key ID registration is the procedure that registers the ID to Intelligent Key unit.
 When performing the Intelligent Key system registration only, the engine cannot be started by inserting the
key into the key cylinder. When performing the NATS registration only, the engine cannot be started by using
the mechanical key.
SECURITY INDICATOR
 Always flashes with ignition knob released (ignition knob switch: OFF) condition on ignition knob LOCK posi-
tion.
 Always flashes with ignition knob released (ignition knob switch: OFF) condition on mechanical key removed
position.
 Turns ON steady when the NATS is activated.
MAINTENANCE INFORMATION
CAUTION:
It is necessary to perform NATS ID registration when replacing any of the following part.
If it's not (or fail to do so), the electrical system may not operate properly.
 BCM
ECM
 Intelligent Key unit
 Intelligent Key
 IPDM E/R
 NATS antenna amp.

SEC-18
< FUNCTION DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
DIAGNOSIS SYSTEM (INTELLIGENT KEY UNIT)
DIAGNOSIS SYSTEM (INTELLIGENT KEY UNIT)
CONSULT-III Function (INTELLIGENT KEY)INFOID:0000000001404049
APPLICATION ITEM
CONSULT-III performs the following functions via CAN communication with Intelligent Key unit.
WORK SUPPORT
SELF-DIAG RESULT
Refer to SEC-71, "DTCIndex".
DATA MONITOR
Diagnosis mode Function Description
WORK SUPPORT Changes the setting for each system function.
SELF-DIAG RESULTS Displays the diagnosis results judged by Intelligent Key unit.
CAN DIAG SUPPORT MNTR Monitors the reception status of CAN communication viewed from Intelligent Key unit.
DATA MONITOR The Intelligent Key unit input/output signals are displayed.
ACTIVE TEST The signals used to activate each device are forcibly supplied from Intelligent Key unit.
ECU IDENTIFICATION The Intelligent Key unit part number is displayed.
Support item Description Selection item Condition
CONFIRM KEY FOB IDIt can check whether Intelligent Key ID code
is registered or not.——
TAKE OUT FROM WINDOW WARNTake away warning chime (from window)
mode can be changed.ON Active
OFF Inactive
LOW BATT OF KEY FOB WARNIntelligent Key low battery warning mode can
be changed.ON Active
OFF Inactive
KEYLESS FUNCTIONDoor lock function with Intelligent Key can be
changed.ON Active
OFF Inactive
ANSWER BACK FUNCTION Buzzer reminder operation can be changed.ON Active
OFF Inactive
SELECTIVE UNLOCK FUNCTION Anti-hijack mode can be changed.ON Active
OFF Inactive
HAZARD ANSWER BACKHazard reminder operation mode can be
changed.Refer to XX-XX, "*****"
.
ANSWER BACK WITH I-KEY LOCKBuzzer reminder operation (lock operation)
mode by each door request switch can be
changed. BUZZER Active
OFF Inactive
ANSWER BACK WITH I-KEY UNLOCKBuzzer reminder operation (unlock operation)
mode by each door request switch can be
changed.BUZZER Active
OFF Inactive
AUTO RELOCK TIMERAuto door lock operation mode can be
changed.OFF Inactive
2 min Active
ENGINE START BY I-KEYEngine start function (by Intelligent Key)
mode can be changed. ON Active
OFF Inactive
LOCK/UNLOCK BY I-KEYDoor lock function by door request switch can
be changed. ON Active
OFF Inactive

SEC-26
< COMPONENT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
B2190, P1614 NATS ANTENNA AMP.
B2190, P1614 NATS ANTENNA AMP.
DescriptionINFOID:0000000001404060
Performs ID verification through BCM and NATS antenna amplifier when ignition knob switch is pressed.
Prohibits the release of steering lock or start of engine when an unregistered ID of mechanical key is used.
DTC LogicINFOID:0000000001404061
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Insert mechanical key into the key cylinder.
2. Press the ignition knob switch.
3. Check “Self diagnostic result” with CONSULT-III.
Is DTC detected?
YES >> Refer to XX-XX, "*****".
NO >> INSPECTION END.
Diagnosis ProcedureINFOID:0000000001532029
1.CHECK NATS ANTENNA AMP. INSTALLATION
Check NATS antenna amp. installation. Refer to XX-XX, "*****"
.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Reinstall NATS antenna amp. correctly.
2.CHECK NVIS (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.
 Perform initialization with CONSULT-III.
For initialization, refer to “CONSULT-III Operation Manual”.
NO >> GO TO 3.
3.CHECK POWER SUPPLY FOR NATS ANTENNA AMP.
1. Turn ignition switch OFF.
2. Check voltage between NATS antenna amp. connector M21 terminal 1 and ground.
DTC No.Trouble diagnosis
nameDTC detecting condition Possible cause
B2190
NATS ANTENNA
AMP Inactive communication between NATS antenna
amp. and BCM.
 Mechanical key is malfunctioning. Harness or connectors
(The NATS antenna amp. circuit is
open or shorted)
 Mechanical key
 NATS antenna amp.
BCM P1614