air conditioning NISSAN X-TRAIL 2005 Service Repair Manual

GI-1
GENERAL INFORMATION
A GENERAL INFORMATION
CONTENTS
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GI
SECTION GI

GENERAL INFORMATION
PRECAUTIONS .......................................................... 3
Description ............................................................... 3
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” .................................................................. 3
Precautions for NATS (NISSAN ANTI-THEFT SYS-
TEM) ........................................................................ 3
General Precautions ................................................ 4
Precautions for All Mode 4 × 4 System .................... 5
Precautions for Three Way Catalyst ......................... 5
Precautions for Fuel ................................................. 5
GASOLINE ENGINE ............................................. 5
DIESEL ENGINE ................................................... 5
Precautions for Multiport Fuel Injection System or
Engine Control System ............................................ 6
Precautions for Turbocharger (If Equipped) ............. 6
Precautions for Hoses .............................................. 6
HOSE REMOVAL AND INSTALLATION ............... 6
HOSE CLAMPING ................................................ 7
Precautions for Engine Oils ...................................... 7
HEALTH PROTECTION PRECAUTIONS ............. 7
ENVIRONMENTAL PROTECTION PRECAU-
TIONS ................................................................... 7
Precautions for Air Conditioning ............................... 7
HOW TO USE THIS MANUAL ................................... 8
Description ............................................................... 8
Terms ....................................................................... 8
Units ......................................................................... 8
Contents ................................................................... 8
Components ............................................................. 9
SYMBOLS ............................................................. 9
How to Follow Trouble Diagnoses .......................... 10
DESCRIPTION .................................................... 10
HOW TO FOLLOW TEST GROUPS IN TROU-
BLE DIAGNOSES ............................................... 10
HARNESS WIRE COLOR AND CONNECTOR
NUMBER INDICATION ........................................ 11
KEY TO SYMBOLS SIGNIFYING MEASURE-
MENTS OR PROCEDURES ............................... 12
How to Read Wiring Diagrams ............................... 14CONNECTOR SYMBOLS ................................... 14
SAMPLE/WIRING DIAGRAM - EXAMPL - .......... 15
DESCRIPTION .................................................... 16
Abbreviations .......................................................... 22
SERVICE INFORMATION FOR ELECTRICAL INCI-
DENT ......................................................................... 23
How to Perform Efficient Diagnosis for an Electrical
Incident ................................................................... 23
WORK FLOW ...................................................... 23
INCIDENT SIMULATION TESTS ........................ 23
CIRCUIT INSPECTION ....................................... 26
Control Units and Electrical Parts ........................... 31
PRECAUTIONS .................................................. 31
CONSULT-II CHECKING SYSTEM .......................... 33
Description .............................................................. 33
Function and System Application ........................... 33
Nickel Metal Hydride Battery Replacement ............ 33
Checking Equipment .............................................. 34
CONSULT-II Start Procedure .................................. 34
CONSULT-II Data Link Connector (DLC) Circuit .... 35
INSPECTION PROCEDURE .............................. 35
LIFTING POINT ......................................................... 36
Special Service Tools ............................................. 36
Garage Jack and Safety Stand ............................... 36
2-Pole Lift ............................................................... 37
Board-On Lift .......................................................... 38
TOW TRUCK TOWING ............................................. 39
Tow Truck Towing ................................................... 39
2WD MODELS .................................................... 39
4WD MODELS .................................................... 40
Vehicle Recovery (Freeing a Stuck Vehicle) ........... 40
TIGHTENING TORQUE OF STANDARD BOLTS .... 41
Description .............................................................. 41
Tightening Torque Table (New Standard Included) ... 41
PREVIOUS STANDARD ..................................... 41
NEW STANDARD BASED ON ISO ..................... 42
DISCRIMINATION OF BOLTS AND NUTS ......... 43
IDENTIFICATION INFORMATION ............................ 44
Model Variation ....................................................... 44
IDENTIFICATION NUMBER ................................ 45

PRECAUTIONS
GI-7
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HOSE CLAMPING

If old rubber hose is re-used, install hose clamp in its original
position (at the indentation where the old clamp was). If there is
a trace of tube bulging left on the old rubber hose, align rubber
hose at that position.

Discard old clamps; replace with new ones.

After installing plate clamps, apply force to them in the direction
of the arrow, tightening rubber hose equally all around.
Precautions for Engine OilsEAS000FW
Prolonged and repeated contact with used engine oil may cause skin cancer. Try to avoid direct skin contact
with used oil.
If skin contact is made, wash thoroughly with soap or hand cleaner as soon as possible.
HEALTH PROTECTION PRECAUTIONS

Avoid prolonged and repeated contact with oils, particularly used engine oils.

Wear protective clothing, including impervious gloves where practicable.

Do not put oily rags in pockets.

Avoid contaminating clothes, particularly underpants, with oil.

Heavily soiled clothing and oil-impregnated footwear should not be worn. Overalls must be cleaned regu-
larly.

First aid treatment should be obtained immediately for open cuts and wounds.

Use barrier creams, applying them before each work period, to help the removal of oil from the skin.

Wash with soap and water to ensure all oil is removed (skin cleansers and nail brushes will help). Prepa-
rations containing lanolin replace the natural skin oils which have been removed.

Do not use gasoline, kerosene, diesel fuel, gas oil, thinners or solvents for cleaning skin.

If skin disorders develop, obtain medical advice without delay.

Where practical, degrease components prior to handling.

Where there is a risk of eye contact, eye protection should be worn, for example, chemical goggles or face
shields; in addition an eye wash facility should be provided.
ENVIRONMENTAL PROTECTION PRECAUTIONS
Dispose of used oil and used oil filters through authorized waste disposal contractors to licensed waste dis-
posal sites, or to the waste oil reclamation trade. If in doubt, contact the local authority for advice on disposal
facilities.
It is illegal to pour used oil on to the ground, down sewers or drains, or into water sources.
The regulations concerning pollution vary between regions.
Precautions for Air Conditioning EAS000FX
Use an approved refrigerant recovery unit any time the air conditioning system must be discharged. Refer to
ATC/MTC section “HFC-134a (R-134a) Service Procedure”, “REFRIGERANT LINES” for specific instructions.
SMA021D
SMA022D

EM-10
[QR]
PREPARATION

Oxygen sensor thread cleaner Reconditioning the exhaust system threads
before installing a new air fuel ratio sensor
and heated oxygen sensor (Use with anti-
seize lubricant shown below.)
a = 18 mm (0.71 in) dia. for zirconia heated
oxygen sensor and air fuel ratio sensor
b = 12 mm (0.47 in) dia. for titania heated
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
Manual lift table caddy Removing and installing engine Tool nameDescription
AEM488
AEM489
ZZA1210D

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

ENGINE CONTROL SYSTEM
QR (WITH EURO-OBD)
INDEX FOR DTC ...................................................... 19
Alphabetical Index .................................................. 19
DTC No. Index ....................................................... 21
PRECAUTIONS ........................................................ 24
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” ................................................................ 24
On Board Diagnostic (OBD) System of Engine and
A/T .......................................................................... 24
Precaution .............................................................. 24
Wiring Diagrams and Trouble Diagnosis ................ 27
PREPARATION ......................................................... 28
Special Service Tools ............................................. 28
Commercial Service Tools ...................................... 29
ENGINE CONTROL SYSTEM .................................. 30
System Diagram ..................................................... 30
Vacuum Hose Drawing ........................................... 32
System Chart ......................................................... 34
Multiport Fuel Injection (MFI) System .................... 35
Electronic Ignition (EI) System ............................... 37
Air Conditioning Cut Control ................................... 38
Fuel Cut Control (at No Load and High Engine
Speed) .................................................................... 38
CAN Communication Unit ...................................... 39
BASIC SERVICE PROCEDURE .............................. 45
Idle Speed and Ignition Timing Check .................... 45
Accelerator Pedal Released Position Learning ...... 46
Throttle Valve Closed Position Learning ................ 47
Idle Air Volume Learning ........................................ 47
Fuel Pressure Check .............................................. 49
ON BOARD DIAGNOSTIC (OBD) SYSTEM ............ 52
Introduction ............................................................ 52
Two Trip Detection Logic ........................................ 52
Emission-related Diagnostic Information ................ 53
NATS (Nissan Anti-theft System) ........................... 64
Malfunction Indicator (MI) ....................................... 64
OBD System Operation Chart ................................ 67
TROUBLE DIAGNOSIS ............................................ 73
Trouble Diagnosis Introduction ............................... 73DTC Inspection Priority Chart ................................. 77
Fail-Safe Chart ....................................................... 78
Basic Inspection ..................................................... 79
Symptom Matrix Chart ............................................ 84
Engine Control Component Parts Location ............ 88
Circuit Diagram ....................................................... 93
ECM Harness Connector Terminal Layout ............. 95
ECM Terminals and Reference Value ..................... 95
CONSULT-II Function (ENGINE) ..........................103
Generic Scan Tool (GST) Function .......................113
CONSULT-II Reference Value in Data Monitor Mode
.115
Major Sensor Reference Graph in Data Monitor
Mode .....................................................................118
TROUBLE DIAGNOSIS - SPECIFICATION VALUE .120
Description ............................................................120
Testing Condition ..................................................120
Inspection Procedure ............................................120
Diagnostic Procedure ...........................................121
TROUBLE DIAGNOSIS FOR INTERMITTENT INCI-
DENT .......................................................................124
Description ............................................................124
Diagnostic Procedure ...........................................124
POWER SUPPLY AND GROUND CIRCUIT ...........125
Wiring Diagram .....................................................125
Diagnostic Procedure ...........................................126
Component Inspection ..........................................132
Ground Inspection ................................................132
DTC U1000, U1001 CAN COMMUNICATION LINE .133
Description ............................................................133
On Board Diagnosis Logic ....................................133
DTC Confirmation Procedure ...............................133
Wiring Diagram .....................................................134
Diagnostic Procedure ...........................................135
DTC P0011 IVT CONTROL .....................................136
Description ............................................................136
CONSULT-II Reference Value in Data Monitor Mode
.136
On Board Diagnosis Logic ....................................137

EC-6 Wiring Diagram .....................................................515
Diagnostic Procedure ...........................................517
MI & DATA LINK CONNECTORS ...........................518
Wiring Diagram .....................................................518
EVAPORATIVE EMISSION SYSTEM .....................522
Description ............................................................522
Component Inspection ..........................................525
POSITIVE CRANKCASE VENTILATION ...............527
Description ............................................................527
Component Inspection ..........................................527
AUTOMATIC SPEED CONTROL DEVICE (ASCD) .529
System Description ...............................................529
Component Description ........................................530
SERVICE DATA AND SPECIFICATIONS (SDS) ....531
Fuel Pressure .......................................................531
Idle Speed and Ignition Timing .............................531
Calculated Load Value ..........................................531
Mass Air Flow Sensor ...........................................531
Intake Air Temperature Sensor .............................531
Engine Coolant Temperature Sensor ...................531
Heated Oxygen Sensor 1 Heater .........................531
Heated Oxygen sensor 2 Heater ..........................532
Crankshaft Position Sensor (POS) .......................532
Camshaft Position Sensor (PHASE) ....................532
Throttle Control Motor ...........................................532
Injector ..................................................................532
Fuel Pump ............................................................532
QR (WITHOUT EURO-OBD)
INDEX FOR DTC .....................................................533
Alphabetical Index ................................................533
DTC No. Index ......................................................535
PRECAUTIONS .......................................................537
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” ...............................................................537
On Board Diagnostic (OBD) System of Engine ....537
Precaution ............................................................537
Wiring Diagrams and Trouble Diagnosis ..............540
PREPARATION .......................................................541
Special Service Tools ...........................................541
Commercial Service Tools ....................................542
ENGINE CONTROL SYSTEM ................................543
System Diagram ...................................................543
Vacuum Hose Drawing .........................................545
System Chart ........................................................547
Multiport Fuel Injection (MFI) System ...................548
Electronic Ignition (EI) System .............................550
Air Conditioning Cut Control .................................551
Fuel Cut Control (at No Load and High Engine
Speed) ..................................................................551
CAN Communication Unit .....................................552
BASIC SERVICE PROCEDURE .............................558
Idle Speed and Ignition Timing Check ..................558
Accelerator Pedal Released Position Learning ....559
Throttle Valve Closed Position Learning ...............560
Idle Air Volume Learning ......................................560
Fuel Pressure Check ............................................562ON BOARD DIAGNOSTIC (OBD) SYSTEM ...........565
Introduction ...........................................................565
Two Trip Detection Logic .......................................565
Emission-related Diagnostic Information ..............565
NATS (Nissan Anti-theft System) ..........................567
Malfunction Indicator (MI) .....................................568
TROUBLE DIAGNOSIS ..........................................572
Trouble Diagnosis Introduction .............................572
DTC Inspection Priority Chart ...............................576
Fail-Safe Chart ......................................................577
Basic Inspection ....................................................578
Symptom Matrix Chart ..........................................584
Engine Control Component Parts Location ...........588
Circuit Diagram .....................................................593
ECM Harness Connector Terminal Layout ............595
ECM Terminals and Reference Value ...................595
CONSULT-II Function (ENGINE) ..........................604
CONSULT-II Reference Value in Data Monitor Mode
.615
Major Sensor Reference Graph in Data Monitor
Mode .....................................................................618
TROUBLE DIAGNOSIS - SPECIFICATION VALUE .620
Description ............................................................620
Testing Condition ..................................................620
Inspection Procedure ............................................620
Diagnostic Procedure ............................................621
TROUBLE DIAGNOSIS FOR INTERMITTENT INCI-
DENT .......................................................................624
Description ............................................................624
Diagnostic Procedure ............................................624
POWER SUPPLY AND GROUND CIRCUIT ...........625
Wiring Diagram .....................................................625
Diagnostic Procedure ............................................626
Component Inspection ..........................................632
Ground Inspection .................................................632
DTC U1000, U1001 CAN COMMUNICATION LINE .633
Description ............................................................633
On Board Diagnosis Logic ....................................633
DTC Confirmation Procedure ................................633
Wiring Diagram .....................................................634
Diagnostic Procedure ............................................635
DTC P0011 IVT CONTROL .....................................636
Description ............................................................636
CONSULT-II Reference Value in Data Monitor Mode
.637
On Board Diagnosis Logic ....................................637
DTC Confirmation Procedure ................................637
Overall Function Check .........................................639
Wiring Diagram .....................................................640
Diagnostic Procedure ............................................641
Component Inspection ..........................................643
Removal and Installation .......................................643
DTC P0102, P0103 MAF SENSOR .........................644
Component Description ........................................644
CONSULT-II Reference Value in Data Monitor Mode
.644
On Board Diagnosis Logic ....................................644
DTC Confirmation Procedure ................................644
Wiring Diagram .....................................................646

EC-10 CONSULT-II Reference Value in Data Monitor Mode
.946
Wiring Diagram .....................................................947
Diagnostic Procedure ...........................................948
Component Inspection ..........................................953
ASCD INDICATOR ..................................................954
Component Description ........................................954
CONSULT-II Reference Value in Data Monitor Mode
.954
Wiring Diagram .....................................................955
Diagnostic Procedure ...........................................957
MI & DATA LINK CONNECTORS ...........................958
Wiring Diagram .....................................................958
EVAPORATIVE EMISSION SYSTEM .....................962
Description ............................................................962
Component Inspection ..........................................965
POSITIVE CRANKCASE VENTILATION ...............967
Description ............................................................967
Component Inspection ..........................................967
AUTOMATIC SPEED CONTROL DEVICE (ASCD) .969
System Description ...............................................969
Component Description ........................................970
SERVICE DATA AND SPECIFICATIONS (SDS) ....971
Fuel Pressure .......................................................971
Idle Speed and Ignition Timing .............................971
Mass Air Flow Sensor ...........................................971
Intake Air Temperature Sensor .............................971
Engine Coolant Temperature Sensor ...................971
Heated Oxygen Sensor 1 Heater .........................971
Heated Oxygen sensor 2 Heater ..........................971
Crankshaft Position Sensor (POS) .......................971
Camshaft Position Sensor (PHASE) ....................972
Throttle Control Motor ...........................................972
Injector ..................................................................972
Fuel Pump ............................................................972
YD (WITH EURO-OBD)
INDEX FOR DTC .....................................................973
Alphabetical Index ................................................973
DTC No. Index ......................................................976
PRECAUTIONS .......................................................979
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” ...............................................................979
On Board Diagnostic (OBD) System of Engine ....979
Precautions ...........................................................979
Wiring Diagrams and Trouble Diagnosis ..............982
PREPARATION .......................................................983
Special Service Tools ...........................................983
Commercial Service Tools ....................................983
ENGINE CONTROL SYSTEM ................................984
System Diagram ...................................................984
Vacuum Hose Drawing .........................................985
System Chart ........................................................986
Fuel Injection Control System ...............................986
Fuel Injection Timing Control System ...................988
Air Conditioning Cut Control .................................988
Fuel Cut Control (At No Load & High Engine Speed) .988Crankcase Ventilation System ..............................989
CAN Communication ............................................989
BASIC SERVICE PROCEDURE .............................994
Fuel Filter ..............................................................994
Fuel Pump Learning Value Clearing .....................994
ON BOARD DIAGNOSTIC (OBD) SYSTEM ...........996
Introduction ...........................................................996
Three Trip Detection Logic and One Trip Detection
Logic .....................................................................996
Emission-related Diagnostic Information ..............996
NATS (Nissan Anti-theft System) .........................1001
Malfunction Indicator (MI) ....................................1001
OBD System Operation Chart ..............................1004
TROUBLE DIAGNOSIS .........................................1007
Trouble Diagnosis Introduction ............................1007
DTC Inspection Priority Chart ..............................1010
Basic Inspection ...................................................1012
Symptom Matrix Chart .........................................1016
Engine Control Component Parts Location ..........1020
Circuit Diagram ....................................................1025
ECM Harness Connector Terminal Layout ...........1027
ECM Terminals And Reference Value ..................1027
CONSULT-II Function (ENGINE) .........................1034
Generic Scan Tool (GST) Function ......................1040
CONSULT-II Reference Value in Data Monitor Mode
1042
Major Sensor Reference Graph in Data Monitor
Mode ....................................................................1043
TROUBLE DIAGNOSIS FOR INTERMITTENT INCI-
DENT ......................................................................1045
Description ...........................................................1045
Diagnostic Procedure ...........................................1045
POWER SUPPLY AND GROUND CIRCUIT ..........1046
Wiring Diagram ....................................................1046
Diagnostic Procedure ...........................................1047
Component Inspection .........................................1054
Ground Inspection ................................................1055
DTC U1000 CAN COMMUNICATION LINE ...........1056
Description ...........................................................1056
On Board Diagnosis Logic ...................................1056
DTC Confirmation Procedure ...............................1056
Wiring Diagram ....................................................1057
Diagnostic Procedure ...........................................1058
DTC P0016 CKP - CMP CORRELATION ..............1059
On Board Diagnosis Logic ...................................1059
DTC Confirmation Procedure ...............................1059
Diagnostic Procedure ...........................................1059
DTC P0045 TC BOOST CONTROL SOLENOID
VALVE .....................................................................1061
Description ...........................................................1061
On Board Diagnosis Logic ...................................1061
DTC Confirmation Procedure ...............................1061
Wiring Diagram ....................................................1062
Diagnostic Procedure ...........................................1063
Component Inspection .........................................1064
DTC P0088 FUEL SYSTEM ...................................1066
On Board Diagnosis Logic ...................................1066
DTC Confirmation Procedure ...............................1066

EC-14 Wiring Diagram ....................................................1294
Diagnostic Procedure ..........................................1296
DTC P2147, P2148 FUEL INJECTOR CIRCUIT ...1297
Component Description .......................................1297
CONSULT-II Reference Value in Data Monitor Mode
1297
On Board Diagnosis Logic ...................................1297
DTC Confirmation Procedure ..............................1297
Wiring Diagram ....................................................1298
Diagnostic Procedure ..........................................1300
Component Inspection .........................................1301
Removal and Installation .....................................1302
DTC P2228, P2229 BARO SENSOR .....................1303
Description ...........................................................1303
On Board Diagnosis Logic ...................................1303
DTC Confirmation Procedure ..............................1303
Diagnostic Procedure ..........................................1304
GLOW CONTROL SYSTEM ..................................1305
Description ...........................................................1305
Wiring Diagram ....................................................1306
Diagnostic Procedure ..........................................1308
Component Inspection .........................................1312
Removal and Installation .....................................1312
BRAKE SWITCH ....................................................1313
Description ...........................................................1313
CONSULT-II Reference Value in Data Monitor Mode
1313
Wiring Diagram ....................................................1314
Diagnostic Procedure ..........................................1316
Component Inspection .........................................1320
PNP SWITCH .........................................................1322
Description ...........................................................1322
CONSULT-II Reference Value in Data Monitor Mode
1322
Wiring Diagram ....................................................1323
Diagnostic Procedure ..........................................1324
PSP SWITCH .........................................................1326
Component Description .......................................1326
CONSULT-II Reference Value in Data Monitor Mode
1326
Wiring Diagram ....................................................1327
Diagnostic Procedure ..........................................1328
Component Inspection .........................................1329
Removal and Installation .....................................1330
FUEL TRANSPORT PUMP ....................................1331
Description ...........................................................1331
Wiring Diagram ....................................................1332
Diagnostic Procedure ..........................................1334
Component Inspection .........................................1338
Removal and Installation .....................................1338
AUTOMATIC SPEED CONTROL DEVICE (ASCD) 1339
System Description ..............................................1339
Component Description .......................................1340
ASCD INDICATOR .................................................1341
Component Description .......................................1341
Wiring Diagram—LHD Models .............................1342
Wiring Diagram—RHD Models ............................1343
Diagnostic Procedure ..........................................1344START SIGNAL ......................................................1345
Wiring Diagram ....................................................1345
Diagnostic Procedure ...........................................1346
MI & DATA LINK CONNECTORS ..........................1348
Wiring Diagram ....................................................1348
SERVICE DATA AND SPECIFICATIONS (SDS) ...1350
General Specifications .........................................1350
Mass Air Flow Sensor ..........................................1350
Engine Coolant Temperature Sensor ...................1350
Fuel Rail Pressure Sensor ...................................1350
Glow Plug .............................................................1350
EGR Volume Control Valve ..................................1350
Crankshaft Position Sensor .................................1350
Camshaft Position Sensor ...................................1350
YD (WITHOUT EURO-OBD)
INDEX FOR DTC ....................................................1351
Alphabetical Index ................................................1351
DTC No. Index .....................................................1353
PRECAUTIONS ......................................................1355
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” ..............................................................1355
On Board Diagnostic (OBD) System of Engine ...1355
Precautions ..........................................................1355
Wiring Diagrams and Trouble Diagnosis ..............1358
PREPARATION ......................................................1359
Special Service Tools ...........................................1359
Commercial Service Tools ...................................1359
ENGINE CONTROL SYSTEM ................................1360
System Diagram ..................................................1360
Vacuum Hose Drawing ........................................1361
System Chart .......................................................1362
Fuel Injection Control System ..............................1362
Fuel Injection Timing Control System ..................1364
Air Conditioning Cut Control ................................1364
Fuel Cut Control (At No Load & High Engine Speed) 1364
Crankcase Ventilation System .............................1365
CAN Communication ...........................................1365
BASIC SERVICE PROCEDURE ............................1370
Fuel Filter .............................................................1370
Fuel Pump Learning Value Clearing ....................1370
ON BOARD DIAGNOSTIC (OBD) SYSTEM ..........1372
DTC and MI Detection Logic ................................1372
Diagnostic Trouble Code (DTC) ...........................1372
Freeze Frame Data ..............................................1373
NATS (Nissan Anti-theft System) .........................1373
Malfunction Indicator (MI) ....................................1373
Relationship Between MI, DTC, CONSULT-II and
Driving Patterns ...................................................1376
TROUBLE DIAGNOSIS .........................................1378
Trouble Diagnosis Introduction ............................1378
DTC Inspection Priority Chart ..............................1381
Basic Inspection ...................................................1382
Symptom Matrix Chart .........................................1387
Engine Control Component Parts Location ..........1391
Circuit Diagram ....................................................1396
ECM Harness Connector Terminal Layout ...........1398

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: For models with ESP
*5: For models without ESP
*6: For QR25DE engine modelsInput (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 signal

ASCD steering switch*6

ASCD brake switch*6

ASCD clutch switch*6

Stop lamp switchFuel 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
Power valve control*
6VIAS control solenoid valve
ASCD vehicle speed control*
6Electric throttle control actuator
Cooling fan control Cooling fan relay

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


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.
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 EC-35, "
Multiport Fuel Injection (MFI) System" .
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
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

ENGINE CONTROL SYSTEM
EC-547
[QR (WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC

System ChartEBS010WO
*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.
*6: For QR25DE engine modelsInput (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 signal

ASCD steering switch*6

ASCD brake switch*6

ASCD clutch switch*6
Fuel 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
Power valve control*
6VIAS control solenoid valve
ASCD vehicle speed control*
6Electric throttle control actuator
Cooling fan control Cooling fan relay