2003 NISSAN TEANA timing

EC-1
ENGINE CONTROL SYSTEM
B ENGINE
CONTENTS
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SECTION EC
A
EC

ENGINE CONTROL SYSTEM
QR
INDEX FOR DTC ...................................................... 10
DTC No. Index ....................................................... 10
Alphabetical Index .................................................. 12
PRECAUTIONS ........................................................ 14
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” ................................................................ 14
On Board Diagnostic (OBD) System of Engine ...... 14
Precaution .............................................................. 14
PREPARATION ......................................................... 18
Special Service Tools ............................................. 18
Commercial Service Tools ...................................... 19
ENGINE CONTROL SYSTEM .................................. 20
System Diagram ..................................................... 20
Multiport Fuel Injection (MFI) System .................... 21
Electronic Ignition (EI) System ............................... 23
Fuel Cut Control (At No Load and High Engine
Speed) .................................................................... 24
AIR CONDITIONING CUT CONTROL ..................... 25
Input/Output Signal Chart ....................................... 25
CAN COMMUNICATION .......................................... 26
System Description ................................................ 26
EVAPORATIVE EMISSION SYSTEM ....................... 27
Description ............................................................. 27
Component Inspection ........................................... 29
POSITIVE CRANKCASE VENTILATION ................. 30
Description ............................................................. 30
Component Inspection ........................................... 30
NATS (NISSAN ANTI-THEFT SYSTEM) .................. 32
Description ............................................................. 32
ON BOARD DIAGNOSTIC (OBD) SYSTEM ............ 33
Introduction ............................................................ 33
Two Trip Detection Logic ........................................ 33
Emission-related Diagnostic Information ................ 33
Malfunction Indicator (MI) ....................................... 36
BASIC SERVICE PROCEDURE .............................. 40
Basic Inspection ..................................................... 40
Idle Speed and Ignition Timing Check .................... 45
Procedure After Replacing ECM ............................ 47Accelerator Pedal Released Position Learning ...... 47
Throttle Valve Closed Position Learning ................. 47
Idle Air Volume Learning ........................................ 47
Fuel Pressure Check .............................................. 49
TROUBLE DIAGNOSIS ............................................ 52
Trouble Diagnosis Introduction ............................... 52
DTC Inspection Priority Chart ................................. 58
Fail-Safe Chart ....................................................... 59
Symptom Matrix Chart ............................................ 60
Engine Control Component Parts Location ............ 64
Vacuum Hose Drawing ........................................... 69
Circuit Diagram ....................................................... 70
ECM Harness Connector Terminal Layout ............. 72
ECM Terminals and Reference Value ..................... 72
CONSULT-II Function (ENGINE) ............................ 80
CONSULT-II Reference Value in Data Monitor Mode
... 90
Major Sensor Reference Graph in Data Monitor
Mode ....................................................................... 93
TROUBLE DIAGNOSIS - SPECIFICATION VALUE ... 95
Description .............................................................. 95
Testing Condition .................................................... 95
Inspection Procedure .............................................. 95
Diagnostic Procedure ............................................. 96
TROUBLE DIAGNOSIS FOR INTERMITTENT INCI-
DENT .......................................................................105
Description ............................................................105
Diagnostic Procedure ...........................................105
POWER SUPPLY AND GROUND CIRCUIT ...........106
Wiring Diagram .....................................................106
Diagnostic Procedure ...........................................107
Ground Inspection .................................................111
DTC U1000, U1001 CAN COMMUNICATION LINE .113
Description ............................................................113
On Board Diagnosis Logic ....................................113
DTC Confirmation Procedure ...............................113
Wiring Diagram .....................................................114
Diagnostic Procedure ...........................................115
DTC P0011 IVT CONTROL .....................................116
Description ............................................................116

EC-4 DTC P2138 APP SENSOR .....................................272
Component Description ........................................272
CONSULT-II Reference Value in Data Monitor Mode
.272
On Board Diagnosis Logic ....................................272
DTC Confirmation Procedure ...............................273
Wiring Diagram .....................................................274
Diagnostic Procedure ...........................................275
Component Inspection ..........................................279
Removal and Installation ......................................279
ELECTRICAL LOAD SIGNAL ................................280
Description ............................................................280
CONSULT-II Reference Value in Data Monitor Mode
.280
Diagnostic Procedure ...........................................280
EVAP CANISTER PURGE VOLUME CONTROL
SOLENOID VALVE .................................................282
Description ............................................................282
CONSULT-II Reference Value in Data Monitor Mode
.282
Wiring Diagram .....................................................283
Diagnostic Procedure ...........................................285
Component Inspection ..........................................288
Removal and Installation ......................................288
FUEL INJECTOR ....................................................289
Component Description ........................................289
CONSULT-II Reference Value in Data Monitor Mode
.289
Wiring Diagram .....................................................290
Diagnostic Procedure ...........................................291
Component Inspection ..........................................293
Removal and Installation ......................................294
FUEL PUMP ............................................................295
Description ............................................................295
CONSULT-II Reference Value in Data Monitor Mode
.295
Wiring Diagram .....................................................296
Diagnostic Procedure ...........................................297
Component Inspection ..........................................300
Removal and Installation ......................................300
HO2S1 .....................................................................301
Component Description ........................................301
CONSULT-II Reference Value in Data Monitor Mode
.301
Wiring Diagram .....................................................302
Diagnostic Procedure ...........................................304
Component Inspection ..........................................305
Removal and Installation ......................................307
HO2S1 HEATER .....................................................308
Description ............................................................308
CONSULT-II Reference Value in Data Monitor Mode
.308
Wiring Diagram .....................................................309
Diagnostic Procedure ...........................................310
Component Inspection ..........................................312
Removal and Installation ......................................312
HO2S2 .....................................................................313
Component Description ........................................313CONSULT-II Reference Value in Data Monitor Mode
.313
Wiring Diagram .....................................................314
Diagnostic Procedure ............................................315
Component Inspection ..........................................317
Removal and Installation .......................................318
HO2S2 HEATER ......................................................319
Description ............................................................319
CONSULT-II Reference Value in Data Monitor Mode
.319
Wiring Diagram .....................................................320
Diagnostic Procedure ............................................321
Component Inspection ..........................................323
Removal and Installation .......................................323
IAT SENSOR ...........................................................324
Component Description ........................................324
Wiring Diagram .....................................................325
Diagnostic Procedure ............................................326
Component Inspection ..........................................328
Removal and Installation .......................................328
IGNITION SIGNAL ..................................................329
Component Description ........................................329
Wiring Diagram .....................................................330
Diagnostic Procedure ............................................333
Component Inspection ..........................................337
Removal and Installation .......................................338
REFRIGERANT PRESSURE SENSOR ..................339
Component Description ........................................339
Wiring Diagram .....................................................340
Diagnostic Procedure ............................................341
Removal and Installation .......................................343
MI & DATA LINK CONNECTORS ...........................344
Wiring Diagram .....................................................344
SERVICE DATA AND SPECIFICATIONS (SDS) ....346
Fuel Pressure ........................................................346
Idle Speed and Ignition Timing ..............................346
Mass Air Flow Sensor ...........................................346
Intake Air Temperature Sensor .............................346
Engine Coolant Temperature Sensor ....................346
Crankshaft Position Sensor (POS) .......................346
Camshaft Position Sensor (PHASE) .....................346
Heated Oxygen Sensor 1 Heater ..........................346
Heated Oxygen sensor 2 Heater ..........................346
Throttle Control Motor ...........................................346
Fuel Injector ..........................................................346
Fuel Pump .............................................................346
VQ
INDEX FOR DTC .....................................................347
DTC No. Index ......................................................347
Alphabetical Index .................................................349
PRECAUTIONS .......................................................351
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” ...............................................................351
On Board Diagnostic (OBD) System of Engine ....351
Precaution .............................................................351

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PREPARATION ....................................................... 355
Special Service Tools ........................................... 355
Commercial Service Tools .................................... 356
ENGINE CONTROL SYSTEM ................................ 357
System Diagram ................................................... 357
Multiport Fuel Injection (MFI) System .................. 358
Electronic Ignition (EI) System ............................. 360
Fuel Cut Control (at No Load and High Engine
Speed) .................................................................. 361
AIR CONDITIONING CUT CONTROL ................... 362
Input/Output Signal Chart ..................................... 362
System Description .............................................. 362
AUTOMATIC SPEED CONTROL DEVICE (ASCD) . 363
System Description .............................................. 363
Component Description ........................................ 364
CAN COMMUNICATION ........................................ 365
System Description .............................................. 365
EVAPORATIVE EMISSION SYSTEM ..................... 366
Description ........................................................... 366
Component Inspection ......................................... 369
POSITIVE CRANKCASE VENTILATION ............... 370
Description ........................................................... 370
Component Inspection ......................................... 370
NATS (NISSAN ANTI-THEFT SYSTEM) ................ 372
Description ........................................................... 372
ON BOARD DIAGNOSTIC (OBD) SYSTEM .......... 373
Introduction .......................................................... 373
Two Trip Detection Logic ...................................... 373
Emission-related Diagnostic Information .............. 373
Malfunction Indicator (MI) ..................................... 377
BASIC SERVICE PROCEDURE ............................ 381
Basic Inspection ................................................... 381
Idle Speed and Ignition Timing Check .................. 387
Procedure After Replacing ECM .......................... 389
Accelerator Pedal Released Position Learning .... 389
Throttle Valve Closed Position Learning .............. 389
Idle Air Volume Learning ...................................... 389
Fuel Pressure Check ............................................ 392
TROUBLE DIAGNOSIS .......................................... 394
Trouble Diagnosis Introduction ............................. 394
DTC Inspection Priority Chart .............................. 400
Fail-Safe Chart ..................................................... 401
Symptom Matrix Chart ......................................... 402
Engine Control Component Parts Location .......... 406
Vacuum Hose Drawing ......................................... 412
Circuit Diagram .................................................... 413
ECM Harness Connector Terminal Layout ........... 415
ECM Terminals and Reference Value .................. 415
CONSULT-II Function (ENGINE) ......................... 425
CONSULT-II Reference Value in Data Monitor Mode
. 434
Major Sensor Reference Graph in Data Monitor
Mode .................................................................... 438
TROUBLE DIAGNOSIS - SPECIFICATION VALUE . 440
Description ........................................................... 440
Testing Condition .................................................. 440
Inspection Procedure ........................................... 440
Diagnostic Procedure ........................................... 441
TROUBLE DIAGNOSIS FOR INTERMITTENT INCI-DENT .......................................................................450
Description ............................................................450
Diagnostic Procedure ...........................................450
POWER SUPPLY AND GROUND CIRCUIT ...........451
Wiring Diagram .....................................................451
Diagnostic Procedure ...........................................452
Ground Inspection ................................................457
DTC U1000, U1001 CAN COMMUNICATION LINE .458
Description ............................................................458
On Board Diagnosis Logic ....................................458
DTC Confirmation Procedure ...............................458
Wiring Diagram .....................................................459
Diagnostic Procedure ...........................................460
DTC P0011, P0021 IVT CONTROL ........................461
Description ............................................................461
CONSULT-II Reference Value in Data Monitor Mode
.461
On Board Diagnosis Logic ....................................462
DTC Confirmation Procedure ...............................462
Overall Function Check ........................................463
Diagnostic Procedure ...........................................464
Component Inspection ..........................................465
Removal and Installation ......................................465
DTC P0102, P0103 MAF SENSOR ........................466
Component Description ........................................466
CONSULT-II Reference Value in Data Monitor Mode
.466
On Board Diagnosis Logic ....................................466
DTC Confirmation Procedure ...............................467
Wiring Diagram .....................................................468
Diagnostic Procedure ...........................................469
Component Inspection ..........................................472
Removal and Installation ......................................473
DTC P0117, P0118 ECT SENSOR .........................474
Component Description ........................................474
On Board Diagnosis Logic ....................................474
DTC Confirmation Procedure ...............................475
Wiring Diagram .....................................................476
Diagnostic Procedure ...........................................477
Component Inspection ..........................................478
Removal and Installation ......................................478
DTC P0122, P0123 TP SENSOR ............................479
Component Description ........................................479
CONSULT-II Reference Value in Data Monitor Mode
.479
On Board Diagnosis Logic ....................................479
DTC Confirmation Procedure ...............................480
Wiring Diagram .....................................................481
Diagnostic Procedure ...........................................482
Component Inspection ..........................................485
Removal and Installation ......................................485
DTC P0132, P0152 HO2S1 .....................................486
Component Description ........................................486
CONSULT-II Reference Value in Data Monitor Mode
.486
On Board Diagnosis Logic ....................................486
DTC Confirmation Procedure ...............................487
Wiring Diagram .....................................................488
Diagnostic Procedure ...........................................491

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Component Inspection ......................................... 760
Removal and Installation ...................................... 761
VSS ......................................................................... 762
Description ........................................................... 762
Diagnostic Procedure ........................................... 762
MI & DATA LINK CONNECTORS .......................... 763
Wiring Diagram .................................................... 763
SERVICE DATA AND SPECIFICATIONS (SDS) .... 765
Fuel Pressure ....................................................... 765
Idle Speed and Ignition Timing ............................. 765Mass Air Flow Sensor ...........................................765
Intake Air Temperature Sensor .............................765
Engine Coolant Temperature Sensor ...................765
Heated Oxygen Sensor 1 Heater .........................765
Heated Oxygen sensor 2 Heater ..........................765
Crankshaft Position Sensor (POS) .......................765
Camshaft Position Sensor (PHASE) ....................765
Throttle Control Motor ...........................................765
Fuel Injector ..........................................................765
Fuel Pump ............................................................766

ENGINE CONTROL SYSTEM
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FUEL INJECTION TIMING
Two types of systems are used.
Sequential Multiport Fuel Injection System
Fuel is injected into each cylinder during each engine cycle according to the firing order. This system is used
when the engine is running.
Simultaneous Multiport Fuel Injection System
Fuel is injected simultaneously into all four cylinders twice each engine cycle. In other words, pulse signals of
the same width are simultaneously transmitted from the ECM.
The four fuel injectors will then receive the signals two times for each engine cycle.
This system is used when the engine is being started and/or if the fail-safe system (CPU) is operating.
FUEL SHUT-OFF
Fuel to each cylinder is cut off during deceleration or operation of the engine at excessively high speeds.
Electronic Ignition (EI) SystemBBS005BG
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
Firing order: 1-3-4-2
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 signal. Comput-
ing 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
SEF337W
Sensor Input Signal to ECM ECM function Actuator
Crankshaft position sensor (POS)
Engine speed*
2
Piston position
Ignition timing
controlPower 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
Knock sensor Engine knocking
Park/neutral position (PNP) switch Gear position
Battery
Battery voltage*
2
Wheel sensor
Vehicle speed*1

EC-24
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ENGINE CONTROL SYSTEM

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
operate under normal driving conditions. If engine knocking occurs, the knock sensor monitors the condition.
The signal is transmitted to the ECM. The ECM retards the ignition timing to eliminate the knocking condition.
Fuel Cut Control (At No Load and High Engine Speed)BBS005BH
INPUT/OUTPUT SIGNAL CHART
*: This signal is sent to the ECM through CAN communication line.
SYSTEM DESCRIPTION
If the engine speed is above 1,800 rpm under no load (for example, the shift position is neutral and engine
speed is over 1,800 rpm) fuel will be cut off after some time. The exact time when the fuel is cut off varies
based on engine speed.
Fuel cut will be operated until the engine speed reaches 1,500 rpm, then fuel cut will be cancelled.
NOTE:
This function is different from deceleration control listed under Multiport Fuel Injection (MFI) System, EC-21
.
Sensor Input Signal to ECM ECM function Actuator
Park/neutral position (PNP) switch Neutral position
Fuel cut control Fuel injector Accelerator pedal position sensor Accelerator pedal position
Engine coolant temperature sensor Engine coolant temperature
Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)Engine speed
Wheel sensor Vehicle speed*

BASIC SERVICE PROCEDURE
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10. CHECK IGNITION TIMING
1. Run engine at idle.
2. Check ignition timing with a timing light.
Refer to EC-45, "
IGNITION TIMING" .
OK or NG
OK >>INSPECTION END
NG >> GO TO 11.
11 . PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING
1. Stop engine.
2. Perform EC-47, "
Accelerator Pedal Released Position Learning" .
>> GO TO 12.
12. PERFORM THROTTLE VALVE CLOSED POSITION LEARNING
Perform EC-47, "
Throttle Valve Closed Position Learning" .
>> GO TO 13.
13. PERFORM IDLE AIR VOLUME LEARNING
Refer to EC-47, "
Idle Air Volume Learning" .
Is Idle Air Volume Learning carried out successfully?
Ye s o r N o
Ye s > > G O T O 1 4 .
No >> 1. Follow the instruction of Idle Air Volume Learning.
2. GO TO 4. 15 ± 5° BTDC (in P or N position)
PBIB2177E

EC-44
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BASIC SERVICE PROCEDURE

14. CHECK TARGET IDLE SPEED AGAIN
With CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Read idle speed in “DATA MONITOR” mode with CONSULT-II.
Refer to EC-45, "
IDLE SPEED" .
Without CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Check idle speed.
Refer to EC-45, "
IDLE SPEED" .
OK or NG
OK >> GO TO 15.
NG >> GO TO 17.
15. CHECK IGNITION TIMING AGAIN
1. Run engine at idle.
2. Check ignition timing with a timing light.
Refer to EC-45, "
IGNITION TIMING" .
OK or NG
OK >>INSPECTION END
NG >> GO TO 16.
16. CHECK TIMING CHAIN INSTALLATION
Check timing chain installation. Refer to EM-53, "
TIMING CHAIN" .
OK or NG
OK >> GO TO 17.
NG >> 1. Repair the timing chain installation.
2. GO TO 4. 700 ± 50 rpm (in P or N position)
700 ± 50 rpm (in P or N position)
15 ± 5° BTDC (in P or N position)
PBIB2177E