2003 NISSAN X-TRAIL fuel pressure

EC-6 PREPARATION .......................................................490
Special Service Tools ...........................................490
Commercial Service Tools ....................................491
ENGINE CONTROL SYSTEM ................................492
System Diagram ...................................................492
Vacuum Hose Drawing .........................................494
System Chart ........................................................496
Multiport Fuel Injection (MFI) System ...................496
Electronic Ignition (EI) System .............................499
Air Conditioning Cut Control .................................499
Fuel Cut Control (at No Load and High Engine
Speed) ..................................................................500
CAN Communication Unit .....................................500
BASIC SERVICE PROCEDURE .............................506
Idle Speed and Ignition Timing Check ..................506
Accelerator Pedal Released Position Learning ....507
Throttle Valve Closed Position Learning ...............508
Idle Air Volume Learning ......................................508
Fuel Pressure Check ............................................510
ON BOARD DIAGNOSTIC (OBD) SYSTEM ..........513
Introduction ...........................................................513
Two Trip Detection Logic ......................................513
Emission-related Diagnostic Information ..............513
NATS (Nissan Anti-theft System) ..........................515
Malfunction Indicator (MI) .....................................516
TROUBLE DIAGNOSIS ..........................................520
Trouble Diagnosis Introduction .............................520
DTC Inspection Priority Chart ...............................523
Fail-safe Chart ......................................................524
Basic Inspection ...................................................526
Symptom Matrix Chart ..........................................532
Engine Control Component Parts Location ..........536
Circuit Diagram .....................................................541
ECM Harness Connector Terminal Layout ...........543
ECM Terminals and Reference Value ...................543
CONSULT-II Function ...........................................551
CONSULT-II Reference Value in Data Monitor Mode
.561
Major Sensor Reference Graph in Data Monitor
Mode .....................................................................563
TROUBLE DIAGNOSIS - SPECIFICATION VALUE .566
Description ............................................................566
Testing Condition ..................................................566
Inspection Procedure ............................................566
Diagnostic Procedure ...........................................567
TROUBLE DIAGNOSIS FOR INTERMITTENT INCI-
DENT .......................................................................570
Description ............................................................570
Diagnostic Procedure ...........................................570
POWER SUPPLY AND GROUND CIRCUIT ...........571
Wiring Diagram .....................................................571
Diagnostic Procedure ...........................................572
Component Inspection ..........................................578
Ground Inspection ................................................578
DTC U1000, U1001 CAN COMMUNICATION LINE .579
Description ............................................................579
On Board Diagnosis Logic ....................................579
DTC Confirmation Procedure ...............................579Wiring Diagram .....................................................580
Diagnostic Procedure ............................................581
DTC P0011 IVT CONTROL .....................................582
Description ............................................................582
CONSULT-II Reference Value in Data Monitor Mode
.582
On Board Diagnosis Logic ....................................583
DTC Confirmation Procedure ................................583
Overall Function Check .........................................585
Wiring Diagram .....................................................586
Diagnostic Procedure ............................................587
Component Inspection ..........................................589
Removal and Installation .......................................589
DTC P0102, P0103 MAF SENSOR .........................590
Component Description ........................................590
CONSULT-II Reference Value in Data Monitor Mode
.590
On Board Diagnosis Logic ....................................590
DTC Confirmation Procedure ................................590
Wiring Diagram .....................................................592
Diagnostic Procedure ............................................593
Component Inspection ..........................................596
Removal and Installation .......................................596
DTC P0117, P0118 ECT SENSOR ..........................597
Component Description ........................................597
On Board Diagnosis Logic ....................................597
DTC Confirmation Procedure ................................598
Wiring Diagram .....................................................599
Diagnostic Procedure ............................................600
Component Inspection ..........................................602
Removal and Installation .......................................602
DTC P0122, P0123 TP SENSOR ............................603
Component Description ........................................603
CONSULT-II Reference Value in Data Monitor Mode
.603
On Board Diagnosis Logic ....................................603
DTC Confirmation Procedure ................................603
Wiring Diagram .....................................................605
Diagnostic Procedure ............................................607
Component Inspection ..........................................610
Removal and Installation .......................................610
DTC P0132 HO2S1 .................................................611
Component Description ........................................611
CONSULT-II Reference Value in Data Monitor Mode
.611
On Board Diagnosis Logic ....................................611
DTC Confirmation Procedure ................................612
Wiring Diagram .....................................................613
Diagnostic Procedure ............................................614
Component Inspection ..........................................616
Removal and Installation .......................................617
DTC P0134 HO2S1 .................................................618
Component Description ........................................618
CONSULT-II Reference Value in Data Monitor Mode
.618
On Board Diagnosis Logic ....................................618
Overall Function Check .........................................619
Wiring Diagram .....................................................620
Diagnostic Procedure ...........................................

EC-9
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Wiring Diagram .................................................... 793
Diagnostic Procedure ........................................... 794
Component Inspection ......................................... 796
Removal and Installation ...................................... 797
IGNITION SIGNAL .................................................. 798
Component Description ........................................ 798
Wiring Diagram .................................................... 799
Diagnostic Procedure ........................................... 802
Component Inspection ......................................... 807
Removal and Installation ...................................... 808
EVAP CANISTER PURGE VOLUME CONTROL
SOLENOID VALVE ................................................. 809
Description ........................................................... 809
CONSULT-II Reference Value in Data Monitor Mode
. 809
Wiring Diagram .................................................... 810
Diagnostic Procedure ........................................... 812
Component Inspection ......................................... 815
Removal and Installation ...................................... 815
PNP SWITCH .......................................................... 816
Component Description ........................................ 816
CONSULT-II Reference Value in Data Monitor Mode
. 816
Wiring Diagram .................................................... 817
Diagnostic Procedure ........................................... 818
INJECTOR CIRCUIT ............................................... 820
Component Description ........................................ 820
CONSULT-II Reference Value in Data Monitor Mode
. 820
Wiring Diagram .................................................... 821
Diagnostic Procedure ........................................... 822
Component Inspection ......................................... 825
Removal and Installation ...................................... 825
VIAS ........................................................................ 826
Description ........................................................... 826
CONSULT-II Reference Value in Data Monitor Mode
. 827
Wiring Diagram .................................................... 828
Diagnostic Procedure ........................................... 830
Component Inspection ......................................... 833
Removal and Installation ...................................... 834
FUEL PUMP CIRCUIT ............................................ 835
Description ........................................................... 835
CONSULT-II Reference Value in Data Monitor Mode
. 835
Wiring Diagram .................................................... 836
Diagnostic Procedure ........................................... 839
Component Inspection ......................................... 842
Removal and Installation ...................................... 842
REFRIGERANT PRESSURE SENSOR ................. 843
Component Description ........................................ 843
Wiring Diagram .................................................... 844
Diagnostic Procedure ........................................... 845
Removal and Installation ...................................... 847
ELECTRICAL LOAD SIGNAL ................................ 848
CONSULT-II Reference Value in Data Monitor Mode
. 848
Wiring Diagram .................................................... 849
Diagnostic Procedure ........................................... 856MI & DATA LINK CONNECTORS ...........................861
Wiring Diagram .....................................................861
Wiring Diagram – ..................................................863
EVAPORATIVE EMISSION SYSTEM .....................865
Description ............................................................865
Component Inspection ..........................................868
POSITIVE CRANKCASE VENTILATION ...............870
Description ............................................................870
Component Inspection ..........................................870
SERVICE DATA AND SPECIFICATIONS (SDS) ....872
Fuel Pressure .......................................................872
Idle Speed and Ignition Timing .............................872
Mass Air Flow Sensor ...........................................872
Intake Air Temperature Sensor .............................872
Engine Coolant Temperature Sensor ...................872
Heated Oxygen Sensor 1 Heater .........................872
Heated Oxygen sensor 2 Heater ..........................872
Crankshaft Position Sensor (POS) .......................872
Camshaft Position Sensor (PHASE) ....................873
Throttle Control Motor ...........................................873
Injector ..................................................................873
Fuel Pump ............................................................873
YD (WITH EURO-OBD)
INDEX FOR DTC .....................................................874
Alphabetical Index ................................................874
DTC No. Index ......................................................876
PRECAUTIONS ......................................................878
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” ...............................................................878
On Board Diagnostic (OBD) System of Engine ....878
Precautions ...........................................................878
Wiring Diagrams and Trouble Diagnosis ..............881
PREPARATION .......................................................882
Special Service Tools ...........................................882
Commercial Service Tools ....................................882
ENGINE CONTROL SYSTEM ................................883
System Diagram ...................................................883
Vacuum Hose Drawing .........................................884
System Chart ........................................................885
Fuel Injection Control System ...............................885
Fuel Injection Timing Control System ...................887
Air Conditioning Cut Control .................................887
Fuel Cut Control (At No Load & High Engine Speed) .887
Crankcase Ventilation System ..............................888
CAN Communication ............................................888
BASIC SERVICE PROCEDURE .............................890
Fuel Filter ..............................................................890
Fuel Pump Learning Value Clearing .....................890
ON BOARD DIAGNOSTIC (OBD) SYSTEM ..........892
Introduction ...........................................................892
Three Trip Detection Logic and One Trip Detection
Logic .....................................................................892
Emission-related Diagnostic Information ..............892
NATS (Nissan Anti-theft System) .........................896
Malfunction Indicator (MI) .....................................896
OBD System Operation Chart ..............................898

EC-13
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CONSULT-II Reference Value in Data Monitor Mode
1134
ECM Terminals and Reference Value .................1134
On Board Diagnosis Logic ..................................1135
DTC Confirmation Procedure ..............................1135
Wiring Diagram ...................................................1136
Diagnostic Procedure ..........................................1137
Component Inspection ........................................1138
Removal and Installation .....................................1138
DTC P1274 FUEL PUMP .......................................1139
Description ..........................................................1139
CONSULT-II Reference Value in Data Monitor Mode
1139
ECM Terminals and Reference Value .................1139
On Board Diagnosis Logic ..................................1140
DTC Confirmation Procedure ..............................1140
Wiring Diagram ...................................................1141
Diagnostic Procedure ..........................................1142
Component Inspection ........................................1143
Removal and Installation .....................................1143
DTC P1275 FUEL PUMP .......................................1144
Description ..........................................................1144
CONSULT-II Reference Value in Data Monitor Mode
1144
ECM Terminals and Reference Value .................1144
On Board Diagnosis Logic ..................................1145
DTC Confirmation Procedure ..............................1145
Wiring Diagram ...................................................1146
Diagnostic Procedure ..........................................1147
Component Inspection ........................................1148
Removal and Installation .....................................1148
DTC P2135 APP SENSOR ....................................1149
Description ..........................................................1149
CONSULT-II Reference Value in Data Monitor Mode
1149
ECM Terminals and Reference Value .................1149
On Board Diagnosis Logic ..................................1150
DTC Confirmation Procedure ..............................1150
Wiring Diagram ...................................................1151
Diagnostic Procedure ..........................................1152
Component Inspection ........................................1154
Removal and Installation .....................................1154
DTC P2146, P2149 FUEL INJECTOR POWER SUP-
PLY .........................................................................1155
Component Description .......................................1155
CONSULT-II Reference Value in Data Monitor Mode
1155
ECM Terminals and Reference Value .................1155
On Board Diagnosis Logic ..................................1156
DTC Confirmation Procedure ..............................1157
Wiring Diagram ...................................................1158
Diagnostic Procedure ..........................................1159
DTC P2147, P2148 FUEL INJECTOR CIRCUIT ...1160
Component Description .......................................1160
CONSULT-II Reference Value in Data Monitor Mode
1160
ECM Terminals and Reference Value .................1160
On Board Diagnosis Logic ..................................1161
DTC Confirmation Procedure ..............................1161Wiring Diagram ....................................................11 6 3
Diagnostic Procedure ..........................................11 6 4
Component Inspection .........................................11 6 5
Removal and Installation .....................................11 6 6
DTC P2228, P2229 BARO SENSOR .....................116 7
Description ...........................................................11 6 7
On Board Diagnosis Logic ...................................11 6 7
DTC Confirmation Procedure ..............................11 6 7
Diagnostic Procedure ..........................................11 6 8
GLOW CONTROL SYSTEM ..................................116 9
Description ...........................................................11 6 9
Wiring Diagram ....................................................11 7 0
Diagnostic Procedure ..........................................11 7 2
Component Inspection .........................................11 7 6
Removal and Installation .....................................11 7 6
BRAKE SWITCH ....................................................117 7
Description ...........................................................11 7 7
CONSULT-II Reference Value in Data Monitor Mode
11 7 7
ECM Terminals and Reference Value ..................11 7 7
Wiring Diagram ....................................................11 7 8
Diagnostic Procedure ..........................................11 7 9
Component Inspection .........................................11 8 0
PNP SWITCH .........................................................118 2
Description ...........................................................11 8 2
CONSULT-II Reference Value in Data Monitor Mode
11 8 2
ECM Terminals and Reference Value ..................11 8 2
Wiring Diagram ....................................................11 8 3
Diagnostic Procedure ..........................................11 8 4
PSP SWITCH .........................................................118 6
Component Description .......................................11 8 6
CONSULT-II Reference Value in Data Monitor Mode
11 8 6
ECM Terminals and Reference Value ..................11 8 6
Wiring Diagram ....................................................11 8 7
Diagnostic Procedure ..........................................11 8 8
Component Inspection .........................................11 8 9
Removal and Installation .....................................11 8 9
FUEL TRANSPORT PUMP ...................................119 0
Description ...........................................................11 9 0
ECM Terminals and Reference Value ..................11 9 1
Wiring Diagram ....................................................11 9 2
Diagnostic Procedure ..........................................11 9 4
Component Inspection .........................................11 9 7
Removal and Installation .....................................11 9 8
START SIGNAL .....................................................119 9
Wiring Diagram ....................................................11 9 9
Diagnostic Procedure ..........................................1200
MI & DATA LINK CONNECTORS ..........................1202
Wiring Diagram ....................................................1202
SERVICE DATA AND SPECIFICATIONS (SDS) ...1204
General Specifications .........................................1204
Mass Air Flow Sensor ..........................................1204
Engine Coolant Temperature Sensor ..................1204
Fuel Rail Pressure Sensor ...................................1204
Glow Plug ............................................................1204
EGR Volume Control Valve .................................1204

EC-17
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ECM Terminals and Reference Value .................1427
On Board Diagnosis Logic ..................................1428
DTC Confirmation Procedure ..............................1428
Wiring Diagram ...................................................1429
Diagnostic Procedure ..........................................1430
Component Inspection ........................................1431
Removal and Installation .....................................1431
DTC P1275 FUEL PUMP .......................................1432
Description ..........................................................1432
CONSULT-II Reference Value in Data Monitor Mode
1432
ECM Terminals and Reference Value .................1432
On Board Diagnosis Logic ..................................1433
DTC Confirmation Procedure ..............................1433
Wiring Diagram ...................................................1434
Diagnostic Procedure ..........................................1435
Component Inspection ........................................1436
Removal and Installation .....................................1436
DTC P2135 APP SENSOR ....................................1437
Description ..........................................................1437
CONSULT-II Reference Value in Data Monitor Mode
1437
ECM Terminals and Reference Value .................1437
On Board Diagnosis Logic ..................................1438
DTC Confirmation Procedure ..............................1438
Wiring Diagram ...................................................1439
Diagnostic Procedure ..........................................1440
Component Inspection ........................................1442
Removal and Installation .....................................1442
DTC P2146, P2149 FUEL INJECTOR POWER SUP-
PLY .........................................................................1443
Component Description .......................................1443
CONSULT-II Reference Value in Data Monitor Mode
1443
ECM Terminals and Reference Value .................1443
On Board Diagnosis Logic ..................................1444
DTC Confirmation Procedure ..............................1445
Wiring Diagram ...................................................1446
Diagnostic Procedure ..........................................1447
DTC P2147, P2148 FUEL INJECTOR CIRCUIT ...1448
Component Description .......................................1448
CONSULT-II Reference Value in Data Monitor Mode
1448
ECM Terminals and Reference Value .................1448
On Board Diagnosis Logic ..................................1449
DTC Confirmation Procedure ..............................1449
Wiring Diagram ...................................................1451
Diagnostic Procedure ..........................................1452
Component Inspection ........................................1454
Removal and Installation .....................................1454
DTC P2228, P2229 BARO SENSOR ....................1455
Description ..........................................................1455
On Board Diagnosis Logic ..................................1455
DTC Confirmation Procedure ..............................1455
Diagnostic Procedure ..........................................1455
GLOW CONTROL SYSTEM .................................1457
Description ..........................................................1457
Wiring Diagram ...................................................1458
Diagnostic Procedure ..........................................1460Component Inspection .........................................1464
Removal and Installation .....................................1464
EGR VOLUME CONTROL SYSTEM .....................1465
Description ...........................................................1465
CONSULT-II Reference Value in Data Monitor Mode
1466
ECM Terminals and Reference Value ..................1466
Wiring Diagram ....................................................1467
Diagnostic Procedure ..........................................1468
Component Inspection .........................................1469
Removal and Installation .....................................1470
TC BOOST CONTROL SOLENOID VALVE ..........1471
Description ...........................................................1471
ECM Terminals and Reference Value ..................1471
Wiring Diagram ....................................................1472
Diagnostic Procedure ..........................................1473
Component Inspection .........................................1474
BRAKE SWITCH ....................................................1475
Description ...........................................................1475
CONSULT-II Reference Value in Data Monitor Mode
1475
ECM Terminals and Reference Value ..................1475
Wiring Diagram ....................................................1476
Diagnostic Procedure ..........................................1477
Component Inspection .........................................1478
PNP SWITCH .........................................................1479
Description ...........................................................1479
CONSULT-II Reference Value in Data Monitor Mode
1479
ECM Terminals and Reference Value ..................1479
Wiring Diagram ....................................................1480
Diagnostic Procedure ..........................................1481
PSP SWITCH .........................................................1483
Component Description .......................................1483
CONSULT-II Reference Value in Data Monitor Mode
1483
ECM Terminals and Reference Value ..................1483
Wiring Diagram ....................................................1484
Diagnostic Procedure ..........................................1485
Component Inspection .........................................1486
Removal and Installation .....................................1486
FUEL TRANSPORT PUMP ...................................1487
Description ...........................................................1487
ECM Terminals and Reference Value ..................1488
Wiring Diagram ....................................................1489
Diagnostic Procedure ..........................................1491
Component Inspection .........................................1494
Removal and Installation .....................................1495
START SIGNAL .....................................................1496
Wiring Diagram ....................................................1496
Diagnostic Procedure ..........................................1497
MI & DATA LINK CONNECTORS ..........................1498
Wiring Diagram ....................................................1498
SERVICE DATA AND SPECIFICATIONS (SDS) ...1500
General Specifications .........................................1500
Mass Air Flow Sensor ..........................................1500
Engine Coolant Temperature Sensor ..................1500
Fuel Rail Pressure Sensor ...................................1500
Glow Plug ............................................................1500

PREPARATION
EC-29
[QR (WITH EURO-OBD)]
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Commercial Service ToolsEBS010L5
Tool name Description
Quick connector
releaseRemoving fuel tube quick connectors in engine
room
(Available in SEC. 164 of PARTS CATALOG: Part
No. 16441 6N210)
Fuel filler cap adapter Checking fuel tank vacuum relief valve opening
pressure
Socket wrench Removing and installing engine coolant
temperature sensor
Oxygen sensor thread
cleaner
i.e.: (J-43897-18)
(J-43897-12)Reconditioning the exhaust system threads
before installing a new oxygen sensor. Use with
anti-seize lubricant shown below.
a: 18 mm diameter with pitch 1.5 mm for
Zirconia Oxygen Sensor
b: 12 mm diameter with pitch 1.25 mm for
Titania Oxygen Sensor
Anti-seize lubricant
i.e.: (Permatex
TM
133AR or equivalent
meeting MIL
specification MIL-A-
907)Lubricating oxygen sensor thread cleaning tool
when reconditioning exhaust system threads.
PBIC0198E
S-NT653
S-NT705
AEM488
S-NT779

EC-34
[QR (WITH EURO-OBD)]
ENGINE CONTROL SYSTEM

System ChartEBS010L8
*1: This sensor is not used to control the engine system under normal conditions.
*2: This input signal is sent to the ECM through CAN communication line.
*3: This output signal is sent from the ECM through CAN communication line.
*4: With ESP models.
*5: Without ESP models.
Multiport Fuel Injection (MFI) SystemEBS010L9
INPUT/OUTPUT SIGNAL CHART
*1: This sensor is not used to control the engine system under normal conditions.Input (Sensor) ECM Function Output (Actuator)

Camshaft position sensor (PHASE)

Crankshaft position sensor (POS)

Mass air flow sensor

Engine coolant temperature sensor

Heated oxygen sensor 1

Throttle position sensor

Accelerator pedal position sensor

Park/neutral position (PNP) switch

Intake air temperature sensor

Power steering pressure sensor

Ignition switch

Battery voltage

Knock sensor

Refrigerant pressure sensor

Stop lamp switch

Heated oxygen sensor 2*1

TCM (Transmission control module)*2

ESP/TCS/ABS control unit*2 *4

ABS actuator and electric unit
(control unit)*2 *5

Air conditioner switch

Wheel sensor*2

Electrical load signalFuel injection & mixture ratio control Fuel injector
Electronic ignition system Power transistor
Fuel pump control Fuel pump relay
On board diagnostic system
MI (On the instrument panel)*
3
Heated oxygen sensor 1 heater control Heated oxygen sensor 1 heater
Heated oxygen sensor 2 heater control Heated oxygen sensor 2 heater
EVAP canister purge flow controlEVAP canister purge volume control
solenoid valve
Air conditioning cut control Air conditioner relay
Cooling fan control Cooling fan relay
Sensor Input Signal to ECMECM
functionActuator
Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)Engine speed*
3 and piston position
Fuel injec-
tion & mix-
ture ratio
controlFuel injector Mass air flow sensor Amount of intake air
Engine coolant temperature sensor Engine coolant temperature
Heated oxygen sensor 1 Density of oxygen in exhaust gas
Throttle position sensor Throttle position
Accelerator pedal position sensor Accelerator pedal position
Park/neutral position (PNP) switch Gear position
Knock sensor Engine knocking condition
Battery
Battery voltage*
3
Power steering pressure sensor Power steering operation
Heated oxygen sensor 2*
1Density of oxygen in exhaust gas
Wheel sensor*
2Vehicle speed
Air conditioner switch Air conditioner operation

ENGINE CONTROL SYSTEM
EC-37
[QR (WITH EURO-OBD)]
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Electronic Ignition (EI) SystemEBS010LA
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
The ignition timing is controlled by the ECM to maintain the best air-
fuel ratio for every running condition of the engine. The ignition tim-
ing data is stored in the ECM. This data forms the map shown.
The ECM receives information such as the injection pulse width and
camshaft position sensor signal. Computing this information, ignition
signals are transmitted to the power transistor.
e.g., N: 1,800 rpm, Tp: 1.50 msec
A °BTDC
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
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.
Air Conditioning Cut ControlEBS010LB
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.Sensor Input Signal to ECMECM func-
tionActuator
Crankshaft position sensor (POS)
Engine speed*
2
piston position
Ignition
timing con-
trolPower 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*1Vehicle speed
SEF742M
Sensor Input Signal to ECM ECM function Actuator
Air conditioner switch Air conditioner ON signal
Air conditioner
cut controlAir conditioner relay Throttle position sensor Throttle valve opening angle
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
Wheel sensor*
1Vehicle speed

EC-38
[QR (WITH EURO-OBD)]
ENGINE CONTROL SYSTEM

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.
Fuel Cut Control (at No Load and High Engine Speed)EBS010LC
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-34
.
CAN Communication UnitEBS010LD
SYSTEM DESCRIPTION
CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tronic control units are equipped onto a vehicle, and each control unit shares information and links with other
control units during operation (not independent). In CAN communication, control units are connected with 2
communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring.
Each control unit transmits/receives data but selectively reads required data only.
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