diagram NISSAN TEANA 2008 Owners Manual

EC-1
ENGINE
C
DE
F
G H
I
J
K L
M
SECTION EC
A
EC
N
O P
CONTENTS
ENGINE CONTROL SYSTEM
VQ25DE, VQ35DE
BASIC INSPECTION ....... .............................
7
DIAGNOSIS AND REPAIR WORKFLOW ..... .....7
Work Flow ........................................................... ......7
Diagnostic Work Sheet ............................................10
INSPECTION AND ADJUSTMENT ....................11
BASIC INSPECTION ......... ........................................11
BASIC INSPECTION : Special Repair Require-
ment .................................................................... ....
11
ADDITIONAL SERVICE WHEN REPLACING
CONTROL UNIT .................................................... ....
14
ADDITIONAL SERVICE WHEN REPLACING
CONTROL UNIT : Description ................................
14
ADDITIONAL SERVICE WHEN REPLACING
CONTROL UNIT : Special Repair Requirement .....
14
IDLE SPEED .......................................................... ....14
IDLE SPEED : Description ........................ ..............14
IDLE SPEED : Special R epair Requirement ...........14
IGNITION TIMING .................................................. ....15
IGNITION TIMING : Description ..............................15
IGNITION TIMING : Special Repair Requirement ....15
ACCELERATOR PEDAL RELEASED POSITION
LEARNING ............................................................ ....
15
ACCELERATOR PEDAL RELEASED POSITION
LEARNING : Description .........................................
15
ACCELERATOR PEDAL RELEASED POSITION
LEARNING : Special Repair Requirement ..............
15
THROTTLE VALVE CLOSED POSITION LEARN-
ING ......................................................................... ....
16
THROTTLE VALVE CLOSED POSITION
LEARNING : Description .........................................
16
THROTTLE VALVE CLOSED POSITION
LEARNING : Special Repair Requirement ..............
16
IDLE AIR VOLUME LEARNING ............................ ....16
IDLE AIR VOLUME LEARNING : Description .........16
IDLE AIR VOLUME LEARNI NG : Special Repair
Requirement ........................................................ ....
16
MIXTURE RATIO SELF-LEARNING VALUE
CLEAR ................................................................... ....
18
MIXTURE RATIO SELF-LEARNING VALUE
CLEAR : Description ................................................
18
MIXTURE RATIO SELF-LEARNING VALUE
CLEAR : Special Repair Requirement .....................
18
FUNCTION DIAGNOSIS ..............................19
ENGINE CONTRO L SYSTEM ..........................19
System Diagram ................................................. ....19
System Description ..................................................20
Component Parts Location ....................................20
Component Description ...........................................25
MULTIPORT FUEL INJECTION SYSTEM .......27
System Diagram .....................................................27
System Description ..................................................27
Component Parts Location ....................................31
Component Description ...........................................36
ELECTRIC IGNITION SYSTEM ........................37
System Diagram .....................................................37
System Description ..................................................37
Component Parts Location ....................................38
Component Description ...........................................43
AIR CONDITIONING CUT CONTROL ..............44
System Diagram ......................................................44
System Description ..................................................44
Component Parts Location ....................................45
Component Description ...........................................50
AUTOMATIC SPEED CONTROL DEVICE
(ASCD) ..............................................................
51
System Diagram ......................................................51
System Description ..................................................51

EC-2
Component Parts Location ...................................53
Component Description .........................................58
CAN COMMUNICATION ...................................59
System Description .................................................59
COOLING FAN CONTROL ...............................60
System Diagram .....................................................60
System Description .................................................60
Component Parts Location ...................................62
Component Description ..........................................67
ELECTRONIC CONTROLLED ENGINE
MOUNT ..............................................................
68
System Diagram .....................................................68
System Description .................................................69
Component Parts Location ...................................70
Component Description .........................................75
EVAPORATIVE EMISSION SYSTEM ...............76
System Diagram .....................................................76
System Description .................................................76
Component Parts Location ...................................80
Component Description .........................................85
INTAKE VALVE TIMING CONTROL .................86
System Diagram .....................................................86
System Description .................................................86
Component Parts Location ...................................87
Component Description ..........................................92
VARIABLE INDUCTION AIR SYSTEM .............93
System Diagram .....................................................93
System Description .................................................93
Component Parts Location ...................................96
Component Description ........................................101
ON BOARD DIAGNOSTIC (OBD) SYSTEM ...102
Diagnosis Description ............................................102
CONSULT-III Function ..........................................113
Diagnosis Tool Function ......................................122
COMPONENT DIAGNOSIS .......................124
TROUBLE DIAGNOSIS - SPECIFICATION
VALUE .............................................................
124
Description .............................................................124
Component Function Check ..................................124
Diagnosis Procedure .............................................125
POWER SUPPLY AND GROUND CIRCUIT ...132
Diagnosis Procedure .............................................132
U1000, U1001 CAN COMM CIRCUIT .............135
Description .............................................................135
DTC Logic ..............................................................135
Diagnosis Procedure .............................................135
P0011, P0021 IVT CONTROL .........................136
DTC Logic ..............................................................136
Diagnosis Procedure .............................................137
Component Inspection ..........................................138
P0031, P0032, P0051, P0052 A/F SENSOR 1
HEATER ...........................................................
140
Description ............................................................140
DTC Logic .............................................................140
Diagnosis Procedure .............................................140
Component Inspection ..........................................142
P0037, P0038, P0057, P0058 HO2S2 HEAT-
ER .....................................................................
143
Description ............................................................143
DTC Logic .............................................................143
Diagnosis Procedure .............................................144
Component Inspection ..........................................145
P0075, P0081 IVT CONTROL SOLENOID
VALVE ..............................................................
146
Description ............................................................146
DTC Logic .............................................................146
Diagnosis Procedure .............................................146
Component Inspection ..........................................147
P0102, P0103 MAF SENSOR ..........................149
Description ............................................................149
DTC Logic .............................................................149
Diagnosis Procedure .............................................150
Component Inspection ..........................................151
P0112, P0113 IAT SENSOR ............................154
Description ............................................................154
DTC Logic .............................................................154
Diagnosis Procedure .............................................155
Component Inspection ..........................................155
P0117, P0118 ECT SENSOR ...........................157
Description ............................................................157
DTC Logic .............................................................157
Diagnosis Procedure .............................................158
Component Inspection ..........................................158
P0122, P0123 TP SENSOR ..............................160
Description ............................................................160
DTC Logic .............................................................160
Diagnosis Procedure .............................................160
Component Inspection ..........................................162
Special Repair Requirement .................................162
P0130, P0150 A/F SENSOR 1 .........................163
Description ............................................................163
DTC Logic .............................................................163
Component Function Check .................................165
Diagnosis Procedure .............................................165
P0131, P0151 A/F SENSOR 1 .........................167
Description ............................................................167
DTC Logic .............................................................167
Diagnosis Procedure .............................................168
P0132, P0152 A/F SENSOR 1 .........................170
Description ............................................................170

EC-5
C
D
E
F
G
H
I
J
K
L
M
ECA
N
O
P
P2122, P2123 APP SENSOR ...........................304
Description ............................................................304
DTC Logic .............................................................304
Diagnosis Procedure .............................................304
Component Inspection ..........................................306
Special Repair Requirement .................................306
P2127, P2128 APP SENSOR ...........................307
Description ............................................................307
DTC Logic .............................................................307
Diagnosis Procedure .............................................307
Component Inspection ..........................................309
Special Repair Requirement .................................310
P2135 TP SENSOR ..........................................311
Description ............................................................311
DTC Logic .............................................................311
Diagnosis Procedure .............................................311
Component Inspection ..........................................313
Special Repair Requirement .................................313
P2138 APP SENSOR .......................................314
Description ............................................................314
DTC Logic .............................................................314
Diagnosis Procedure .............................................314
Component Inspection ..........................................316
Special Repair Requirement .................................317
P2A00, P2A03 A/F SENSOR 1 ........................318
Description ............................................................318
DTC Logic .............................................................318
Diagnosis Procedure .............................................319
ASCD BRAKE SWITCH ...................................321
Description ............................................................321
Component Function Check ..................................321
Diagnosis Procedure .............................................321
Component Inspection (ASCD Brake Switch) .......322
ASCD INDICATOR ...........................................323
Description ............................................................323
Component Function Check ..................................323
Diagnosis Procedure .............................................323
COOLING FAN .................................................324
Description ............................................................324
Component Function Check ..................................324
Diagnosis Procedure .............................................324
Component Inspection (Cooling Fan Motor) .........327
Component Inspection (Cooling Fan Relay) .........328
ELECTRICAL LOAD SIGNAL .........................329
Description ............................................................329
Component Function Check ..................................329
Diagnosis Procedure .............................................329
ELECTRONIC CONTROLLED ENGINE
MOUNT .............................................................
331
Description ............................................................331
Component Function Check ..................................331
Diagnosis Procedure .............................................331
Component Inspection ...........................................332
FUEL INJECTOR ............................................334
Description .............................................................334
Component Function Check ..................................334
Diagnosis Procedure .............................................334
Component Inspection ...........................................336
FUEL PUMP ....................................................337
Description .............................................................337
Component Function Check ..................................337
Diagnosis Procedure .............................................337
Component Inspection (Fuel Pump) ......................340
Component Inspection (Condenser) ......................340
IGNITION SIGNAL ..........................................341
Description .............................................................341
Component Function Check ..................................341
Diagnosis Procedure .............................................341
Component Inspection (Ignition Coil with Power
Transistor) .............................................................
344
Component Inspection (Condenser) ......................345
MALFUNCTION INDICATOR .........................346
Description .............................................................346
Component Function Check ..................................346
Diagnosis Procedure .............................................346
POSITIVE CRANKCASE VENTILATION .......347
Description .............................................................347
Component Inspection ...........................................347
REFRIGERANT PRESSURE SENSOR ..........348
Description .............................................................348
Component Function Check ..................................348
Diagnosis Procedure .............................................348
VARIABLE INDUCTION AIR SYSTEM ..........351
Description .............................................................351
Component Function Check (VQ35DE engine) .....351
Component Function Check (VQ25DE engine) .....353
Diagnosis Procedure (VQ35DE engine) ................353
Diagnosis Procedure (VQ25DE engine) ................355
ECU DIAGNOSIS .......................................357
ECM .................................................................357
Reference Value ....................................................357
Wiring Diagram—ENGINE CONTROL SYS-
TEM— ...................................................................
371
Fail safe .................................................................386
DTC Inspection Priority Chart .............................388
DTC Index .............................................................389
How to Set SRT Code ........................................392
Test Value and Test Limit ...................................394
SYMPTOM DIAGNOSIS ............................400
ENGINE CONTROL SYSTEM SYMPTOMS ...400
Symptom Table .....................................................400
NORMAL OPERATING CONDITION .............404

ENGINE CONTROL SYSTEM
EC-19
< FUNCTION DIAGNOSIS >[VQ25DE, VQ35DE]
C
D
E
F
G
H
I
J
K
L
MA
EC
N
P O
FUNCTION DIAGNOSIS
ENGINE CONTROL SYSTEM
System DiagramINFOID:0000000003856461
JMBIA1465GB

MULTIPORT FUEL INJECTION SYSTEM
EC-27
< FUNCTION DIAGNOSIS >[VQ25DE, VQ35DE]
C
D
E
F
G
H
I
J
K
L
MA
EC
N
P O
MULTIPORT FUEL INJECTION SYSTEM
System DiagramINFOID:0000000003856465
System DescriptionINFOID:0000000003856466
INPUT/OUTPUT SIGNAL CHART
JMBIA1492GB

ELECTRIC IGNITION SYSTEM
EC-37
< FUNCTION DIAGNOSIS >[VQ25DE, VQ35DE]
C
D
E
F
G
H
I
J
K
L
MA
EC
N
P O
ELECTRIC IGNITION SYSTEM
System DiagramINFOID:0000000003856469
System DescriptionINFOID:0000000003856470
INPUT/OUTPUT SIGNAL CHART
*1: This signal is sent to the ECM through CAN communication line.
*2: ECM determines the start signal status by the signals of engine speed and battery voltage.
SYSTEM DESCRIPTION
Ignition order: 1 - 2 - 3 - 4 - 5 - 6
The ignition timing is controlled by the ECM to maintain the best air-fuel ratio for every running condition of the
engine. The ignition timing data is stored in the ECM.
The ECM receives information such as the injection pulse width and camshaft position sensor (PHASE) sig-
nal. Computing this information, ignition signals are transmitted to the power transistor.
During the following conditions, the ignition timing is revised by the ECM according to the other data stored in
the ECM.
 At starting
 During warm-up
At idle
 At low battery voltage
 During acceleration
The knock sensor retard system is designed only for emergencies. The basic ignition timing is programmed
within the anti-knocking zone, if recommended fuel is used under dry conditions. The retard system does not
JMBIA1493GB
Sensor Input Signal to ECM ECM function Actuator
Crankshaft position sensor (POS)
Engine speed*
2
Piston position
Ignition timing
controlIgnition coil
(with power transistor) Camshaft position sensor (PHASE)
Mass air flow sensor Amount of intake air
Engine coolant temperature sensor Engine coolant temperature
Throttle position sensor Throttle position
Accelerator pedal position sensor Accelerator pedal position
Battery
Battery voltage*
2
Knock sensor Engine knocking
TCM (VQ35DE engine)
Park/neutral position (PNP) switch (VQ25DE engine)Gear position
ABS actuator and electric unit (control unit)
Vehicle speed*
1

EC-44
< FUNCTION DIAGNOSIS >[VQ25DE, VQ35DE]
AIR CONDITIONING CUT CONTROL
AIR CONDITIONING CUT CONTROL
System DiagramINFOID:0000000003856473
System DescriptionINFOID:0000000003856474
INPUT/OUTPUT SIGNAL CHART
*1: This signal is sent to the ECM through CAN communication line.
*2: ECM determines the start signal status by the signals of engine speed and battery voltage.
SYSTEM DESCRIPTION
This system improves engine operation when the air conditioner is used.
Under the following conditions, the air conditioner is turned OFF.
 When the accelerator pedal is fully depressed.
 When cranking the engine.
 At high engine speeds.
 When the engine coolant temperature becomes excessively high.
 When operating power steering during low engine speed or low vehicle speed.
 When engine speed is excessively low.
 When refrigerant pressure is excessively low or high.
JMBIA1414GB
Sensor Input Signal to ECM ECM function Actuator
BCM
Air conditioner ON signal*
1
Air conditioner
cut controlAir conditioner relay Accelerator pedal position sensor Accelerator pedal position
Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)Engine speed*
2
Engine coolant temperature sensor Engine coolant temperature
Battery
Battery voltage*
2
Refrigerant pressure sensor Refrigerant pressure
Power steering pressure sensor Power steering operation
ABS actuator and electric unit (control unit)
Vehicle speed*
1

AUTOMATIC SPEED CONTROL DEVICE (ASCD)
EC-51
< FUNCTION DIAGNOSIS >[VQ25DE, VQ35DE]
C
D
E
F
G
H
I
J
K
L
MA
EC
N
P O
AUTOMATIC SPEED CONTROL DEVICE (ASCD)
System DiagramINFOID:0000000003856477
System DescriptionINFOID:0000000003856478
INPUT/OUTPUT SIGNAL CHART
*: This signal is sent to the ECM through CAN communication line
BASIC ASCD SYSTEM
Refer to Owner's Manual for ASCD operating instructions.
Automatic Speed Control Device (ASCD) allows a driver to keep vehicle at predetermined constant speed
without depressing accelerator pedal. Driver can set vehicle speed in advance between approximately 40 km/
h (25 MPH) and 144 km/h (89 MPH).
ECM controls throttle angle of electric throttle control actuator to regulate engine speed.
Operation status of ASCD is indicated by CRUISE lamp and SET lamp in combination meter. If any malfunc-
tion occurs in the ASCD system, it automatically deactivates control.
NOTE:
Always drive vehicle in a safe manner according to traffic conditions and obey all traffic laws.
SET OPERATION
Press MAIN switch. (The CRUISE lamp in combination meter illuminates.)
When vehicle speed reaches a desired speed between approximately 40 km/h (25 MPH) and 144 km/h (89
MPH), press SET/COAST switch. (Then SET lamp in combination meter illuminates.)
ACCELERATE OPERATION
If the RESUME/ACCELERATE switch is pressed during cruise control driving, increase the vehicle speed until
the switch is released or vehicle speed reaches maximum speed controlled by the system.
And then ASCD will maintain the new set speed.
CANCEL OPERATION
When any of following conditions exist, cruise operation will be canceled.
 CANCEL switch is pressed
 More than 2 switches at ASCD steering switch are pressed at the same time (Set speed will be cleared)
JMBIA1494GB
Sensor Input signal to ECM ECM function Actuator
ASCD brake switch Brake pedal operation
ASCD vehicle speed
controlElectric throttle control
actuator Stop lamp switch Brake pedal operation
ASCD steering switch ASCD steering switch operation
TCM (VQ35DE engine)
Park/neutral position (PNP) switch (VQ25DE
engine)Gear position
Powertrain revolution*
ABS actuator and electric unit (control unit) Vehicle speed*

EC-60
< FUNCTION DIAGNOSIS >[VQ25DE, VQ35DE]
COOLING FAN CONTROL
COOLING FAN CONTROL
System DiagramINFOID:0000000003856482
System DescriptionINFOID:0000000003856483
INPUT/OUTPUT SIGNAL CHART
*1: The ECM determines the start signal status by the signals of engine speed and battery voltage.
*2: This signal is sent to ECM through CAN communication line.
SYSTEM DESCRIPTION
The ECM controls the cooling fan corresponding to the vehicle speed, engine coolant temperature, refrigerant
pressure, and air conditioner ON signal. The control system has 4-step control [HIGH/MIDDLE/LOW/OFF].
JMBIA1324GB
Sensor Input signal to ECM ECM function Actuator
Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)Engine speed*
1
Cooling fan
controlIPDM E/R
↓
Cooling fan relay
↓
Cooling fan motor Battery
Battery voltage*
1
ABS actuator and electric unit (control unit)
Vehicle speed*2
Engine coolant temperature sensor Engine coolant temperature
BCM
Air conditioner ON signal*
2
Refrigerant pressure sensor Refrigerant pressure

EC-68
< FUNCTION DIAGNOSIS >[VQ25DE, VQ35DE]
ELECTRONIC CONTROLLED ENGINE MOUNT
ELECTRONIC CONTROLLED ENGINE MOUNT
System DiagramINFOID:0000000003856486
1. Power valve actuator 1 2. VIAS control solenoid valve 1 3. VIAS control solenoid valve 2
4. Power valve actuator 2 5. Intake manifold collector
: From next figure
JMBIA0182ZZ