2007 NISSAN TIIDA EC Engine Control System

PCS-20
< ECU DIAGNOSIS >[IPDM E/R]
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
Te r m i n a lWire
colorSignal nameSignal
input/
outputMeasuring condition
Reference value
(Approx.) Ignition
switchOperation or condition
1 R Battery power supply Input OFF — Battery voltage
2 G Battery power supply Input OFF — Battery voltage
3 Y ECM Relay Output —Ignition switch ON or START Battery voltage
Ignition switch OFF or ACC 0V
4 G ECM relay Output —Ignition switch ON or START Battery voltage
Ignition switch OFF or ACC 0V
6GRDaytime light relay
controlInput ON Daytime light system active. Less than battery voltage
Daytime light system inactive. Battery voltage
7 G ECM relay control Input —Ignition switch ON or START 0V
Ignition switch OFF or ACC Battery voltage
8GThrottle control motor
relayOutput —Ignition switch ON or START Battery voltage
Ignition switch OFF or ACC 0V
11 W A/C compressor OutputON or
STARTA/C switch ON or defrost A/C
switchBattery voltage
A/C switch OFF or defrost A/C
switch0V
12 OIgnition switch sup-
plied powerInput —OFF or ACC 0V
ON or START Battery voltage
14BR
(M/T)
R
(A/T)Fuse 49 Output —Ignition switch ON or START Battery voltage
Ignition switch OFF or ACC 0V
15 V Fuse 50 Output —Ignition switch ON or START Battery voltage
Ignition switch OFF or ACC 0V
16 SB Fuse 51 Output —Ignition switch ON or START Battery voltage
Ignition switch OFF or ACC 0V
19 R Starter motor Output START — Battery voltage
20L
(with
A/C)
LG
(with-
out A/
C)Cooling fan relay-1 Output —Conditions correct for cooling
fan low operation.Battery voltage
Conditions not correct for
cooling fan low operation.0V
21 WIgnition switch START
signalInput START — Battery voltage
22 G Battery power supply Input — — Battery voltage
23 L Cooling fan relay-2 Input —Conditions correct for cooling
fan high operationBattery voltage
Conditions not correct for
cooling fan high operation0V
24 Y Cooling fan relay-3 Output —Conditions correct for cooling
fan high operationBattery voltage
Conditions not correct for
cooling fan high operation0V
27 BR
Tail lamp relay (park-
ing lamps)Output — Lighting switch in 2nd position Battery voltage

PCS
POWER SUPPLY AND GROUND CIRCUIT
PCS-37
< COMPONENT DIAGNOSIS >[POWER DISTRIBUTION SYSTEM]
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POWER SUPPLY AND GROUND CIRCUIT
BCM
BCM : Diagnosis ProcedureINFOID:0000000001697613
Refer to BCS-30, "Diagnosis Procedure".
BCM : Special Repair RequirementINFOID:0000000001697614
1.REQUIRED WORK WHEN REPLACING BCM
Initialize control unit. Refer to CONSULT-III Operation Manual.
>> Work end.
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM) : Di-
agnosis Procedure
INFOID:0000000001697615
Refer to PCS-16, "Diagnosis Procedure".

PCS-40
< ON-VEHICLE MAINTENANCE >[POWER DISTRIBUTION SYSTEM]
PRE-INSPECTION FOR DIAGNOSTIC
ON-VEHICLE MAINTENANCE
PRE-INSPECTION FOR DIAGNOSTIC
Basic InspectionINFOID:0000000001697628
The engine start function, door lock function, power distribution system and NATS-NVIS system are closely
related to each other regarding control. Narrow down the functional area in question by performing basic
inspection to identify which function is malfunctioning. The vehicle security function can operate only when the
door lock and power distribution system are operating normally. Therefore, it is easy to identify any factor
unique to the vehicle security system by performing the vehicle security operation check after basic inspection.
1. CHECK DOOR LOCK OPERATION
1. Check the door lock for normal operation with the keyfob or Intelligent Key (if equipped) and door request
switch.
Successful door lock operation with the keyfob or Intelligent Key (if equipped) and request SW indicates
that the remote keyless entry receiver and inside key antenna (with Intelligent Key) required for engine
start are functioning normally.
Identify the malfunctioning point by referring to the DLK section if the door cannot be unlocked.
Can the door be locked with the Intelligent Key and door request switch?
YES >> GO TO 2
NO >> Refer to DLK-191, "
DOOR LOCK AND UNLOCK SWITCH : Symptom Table" (with Intelligent Key
without super lock), DLK-420, "
DOOR LOCK AND UNLOCK SWITCH : Symptom Table" (with
Intelligent Key and super lock), DLK-567, "
DOOR LOCK AND UNLOCK SWITCH : Symptom
Table" (without Intelligent Key without super lock) or DLK-718, "DOOR LOCK AND UNLOCK
SWITCH : Symptom Table" (without Intelligent Key with super lock).
2. CHECK ENGINE STARTING
1. Checks that the engine starts.
Does the engine start?
YES >> GO TO 3
NO >> Refer to SEC-76, "
Symptom Table" (with Intelligent Key) or SEC-117, "Symptom Table" (without
Intelligent Key).
3. CHECK STEERING LOCKING (MODELS WITH INTELLIGENT KEY)
1. Does the steering lock when operating door switch after switching the power supply from ON position (or
ACC position) to LOCK position?
If door switch is malfunctioning, BCM cannot lock the steering. If BCM does not detect DTC, steering lock
unit is normal.
Does steering lock?
YES >> GO TO 4
NO >> Refer to STC-29, "
Symptom Chart".
4. CHECK VEHICLE SECURITY SYSTEM
1. Check the vehicle security system for normal operation.
The vehicle security function can operate only when the door lock and power distribution functions are
operating normally.
Therefore, it is easy to identify any factor unique to the vehicle security by performing the vehicle security
operation check after this basic inspection.
>> Refer to SEC-75, "
Symptom Table" (with Intelligent Key) or SEC-116, "Symptom Table" (without
Intelligent Key).

SEC-1
BODY EXTERIOR, DOORS, ROOF & VEHICLE SECURITY
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SECTION SEC
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CONTENTS
SECURITY CONTROL SYSTEM
WITH INTELLIGENT KEY SYSTEM
BASIC INSPECTION ....................................
4
DIAGNOSIS AND REPAIR WORKFLOW ..........4
Work Flow .................................................................4
INSPECTION AND ADJUSTMENT .....................7
ADDITIONAL SERVICE WHEN REPLACING
CONTROL UNIT ..........................................................
7
ADDITIONAL SERVICE WHEN REPLACING
CONTROL UNIT : Special Repair Requirement .......
7
ECM RE-COMMUNICATING FUNCTION ...................7
ECM RE-COMMUNICATING FUNCTION : De-
scription .....................................................................
7
ECM RE-COMMUNICATING FUNCTION : Spe-
cial Repair Requirement ............................................
7
FUNCTION DIAGNOSIS ...............................8
INTELLIGENT KEY SYSTEM/ENGINE
START FUNCTION .............................................
8
System Diagram ........................................................8
System Description ...................................................8
Component Parts Location ......................................10
Component Description ...........................................10
NATS (NISSAN ANTI-THEFT SYSTEM) ...........12
System Diagram ......................................................12
System Description .................................................12
Component Parts Location ......................................14
Component Description ..........................................14
DIAGNOSIS SYSTEM (BCM) ............................15
COMMON ITEM .........................................................15
COMMON ITEM : CONSULT-III Function (BCM -
COMMON ITEM) .....................................................
15
IMMU ..........................................................................15
IMMU : CONSULT-III Function (BCM - IMMU) .......15
THEFT ALM ...............................................................16
THEFT ALM : CONSULT-III Function (BCM -
THEFT ALM) ...........................................................
16
DIAGNOSIS SYSTEM (INTELLIGENT KEY
UNIT) .................................................................
18
CONSULT-III Function (INTELLIGENT KEY) ..........18
COMPONENT DIAGNOSIS .........................21
U1000 CAN COMM CIRCUIT ...........................21
Description ...............................................................21
DTC Logic ................................................................21
Diagnosis Procedure ...............................................21
U1010 CONTROL UNIT (CAN) .........................22
Description ...............................................................22
DTC Logic ................................................................22
Diagnosis Procedure ...............................................22
Special Repair Requirement ....................................22
B2013 ID DISCORD I-KEY-STRG ....................23
Description ...............................................................23
DTC Logic ................................................................23
Diagnosis Procedure ...............................................23
B2190, P1614 NATS ANTENNA AMP. ............26
Description ...............................................................26
DTC Logic ................................................................26
Diagnosis Procedure ...............................................26
B2191, P1615 DIFFERENCE OF KEY .............29
Description ...............................................................29
DTC Logic ................................................................29
Diagnosis Procedure ...............................................29
B2192, P1611 ID DISCORD, IMMU-ECM .........30
Description ...............................................................30
DTC Logic ................................................................30
Diagnosis Procedure ...............................................30
B2193, P1612 CHAIN OF ECM-IMMU ..............32

SEC-2
Description ..............................................................32
DTC Logic ...............................................................32
Diagnosis Procedure ..............................................32
B2194 ID DISCORD IMMU-I-KEY .....................33
Description ..............................................................33
DTC Logic ...............................................................33
Diagnosis Procedure ..............................................33
B2552 INTELLIGENT KEY ................................34
Description ..............................................................34
DTC Logic ...............................................................34
Diagnosis Procedure ..............................................34
Special Repair Requirement ...................................34
B2590 ID DISCORD BCM-I-KEY .......................35
Description ..............................................................35
DTC Logic ...............................................................35
Diagnosis Procedure ..............................................35
P1610 LOCK MODE ..........................................36
Description ..............................................................36
DTC Logic ...............................................................36
Diagnosis Procedure ..............................................36
POWER SUPPLY AND GROUND CIRCUIT .....37
INTELLIGENT KEY UNIT .........................................37
INTELLIGENT KEY UNIT : Diagnosis Procedure ...37
BCM ...........................................................................38
BCM : Diagnosis Procedure ...................................38
KEY SWITCH .....................................................39
Description ..............................................................39
Component Function Check ...................................39
Diagnosis Procedure ..............................................39
Component Inspection ............................................41
IGNITION KNOB SWITCH .................................42
Description ..............................................................42
Component Function Check ...................................42
Diagnosis Procedure ..............................................42
Component Inspection ............................................44
STOP LAMP SWITCH (A/T) ..............................45
Diagnosis Procedure ..............................................45
STOP LAMP SWITCH (M/T) ..............................47
Diagnosis Procedure ..............................................47
VEHICLE SECURITY INDICATOR ....................49
Description ..............................................................49
Component Function Check .................................49
Diagnosis Procedure ..............................................49
SECURITY SYSTEM PRE-WIRING ..................51
Wiring Diagram - SECURITY SYSTEM PRE-WIR-
ING - .......................................................................
51
ECU DIAGNOSIS ........................................54
BCM (BODY CONTROL MODULE) ..................54
Reference Value .....................................................54
Wiring Diagram - INTELLIGENT KEY SYSTEM/
ENGINE START FUNCTION - ................................
55
Wiring Diagram - NATS - ........................................63
Fail Safe .................................................................68
DTC Inspection Priority Chart ...............................69
DTC Index ..............................................................69
INTELLIGENT KEY UNIT ..................................71
Reference Value .....................................................71
Fail Safe .................................................................71
DTC Inspection Priority Chart ...............................71
DTC Index ..............................................................71
IPDM E/R (INTELLIGENT POWER DISTRI-
BUTION MODULE ENGINE ROOM) .................
73
Reference Value .....................................................73
Fail Safe .................................................................73
DTC Index ..............................................................74
SYMPTOM DIAGNOSIS ............................75
INTELLIGENT KEY SYSTEM/ENGINE
START FUNCTION SYMPTOMS ......................
75
Symptom Table .......................................................75
NATS (NISSAN ANTI-THEFT SYSTEM)
SYMPTOMS .......................................................
76
Symptom Table .......................................................76
ON-VEHICLE MAINTENANCE ..................77
PRE-INSPECTION FOR DIAGNOSTIC ............77
Basic Inspection ......................................................77
Vehicle Security Operation Check ..........................77
ON-VEHICLE REPAIR ...............................79
INTELLIGENT KEY UNIT ..................................79
Removal and Installation .........................................79
WITHOUT INTELLIGENT KEY SYSTEM
BASIC INSPECTION ..................................
80
DIAGNOSIS AND REPAIR WORKFLOW .........80
Work Flow ...............................................................80
INSPECTION AND ADJUSTMENT ...................83
ADDITIONAL SERVICE WHEN REPLACING
CONTROL UNIT ........................................................
83
ADDITIONAL SERVICE WHEN REPLACING
CONTROL UNIT : Special Repair Requirement .....
83
ECM RE-COMMUNICATING FUNCTION .................83
ECM RE-COMMUNICATING FUNCTION : De-
scription ...................................................................
83
ECM RE-COMMUNICATING FUNCTION : Spe-
cial Repair Requirement .........................................
83
FUNCTION DIAGNOSIS ............................84

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.

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