
Diagnostic Procedure ............................................1019
INJECTOR.................................................................1021
Component Description .........................................1021
CONSULT-II Reference Value in Data Monitor
Mode ......................................................................1021
ECM Terminals and Reference Value ...................1021
Wiring Diagram ......................................................1022
Diagnostic Procedure ............................................1024
Component Inspection ...........................................1026
START SIGNAL.........................................................1027
CONSULT-II Reference Value in Data Monitor
Mode ......................................................................1027
ECM Terminals and Reference Value ...................1027
Wiring Diagram ......................................................1028
Diagnostic Procedure ............................................1030
FUEL PUMP...............................................................1032
System Description ................................................1032
Component Description .........................................1032
CONSULT-II Reference Value in Data Monitor
Mode ......................................................................1032
ECM Terminals and Reference Value ...................1033
Wiring Diagram ......................................................1034
Diagnostic Procedure ............................................1036
Component Inspection ...........................................1038
POWER STEERING OIL PRESSURE SWITCH.......1039
Component Description .........................................1039
CONSULT-II Reference Value in Data Monitor
Mode ......................................................................1039
ECM Terminals and Reference Value ...................1039
Wiring Diagram ......................................................1040
Diagnostic Procedure ............................................1041
Component Inspection ...........................................1043
REFRIGERANT PRESSURE SENSOR....................1044
Description .............................................................1044
ECM Terminals and Reference Value ...................1044
Wiring Diagram ......................................................1045
Diagnostic Procedure ............................................1047
ELECTRICAL LOAD SIGNAL...................................1050
CONSULT-II Reference Value in Data Monitor
Mode ......................................................................1050
ECM Terminals and Reference Value ...................1050
Wiring Diagram ......................................................1051
Diagnostic Procedure - Load Signal - ...................1055
Diagnostic Procedure - Heater Control Panel
(Fan Switch) - ........................................................1059
MI & DATA LINK CONNECTORS............................1060
Wiring Diagram ......................................................1060
SERVICE DATA AND SPECIFICATIONS (SDS).....1062
Fuel Pressure Regulator........................................1062
Idle Speed and Ignition Timing ..............................1062
Ignition Coil ............................................................1062
Mass Air Flow Sensor............................................1062Engine Coolant Temperature Sensor ....................1062
EGR Volume Control Valve (where fitted) .............1062
EGR Temperature Sensor (where fitted) ...............1062
Fuel Pump .............................................................1063
IACV-AAC Valve ....................................................1063
Injector ...................................................................1063
Resistor ..................................................................1063
Throttle Position Sensor ........................................1063
Heated Oxygen Sensor 1 (Front) Heater ..............1063
Intake Air Temperature Sensor ..............................1063
EVAP Canister Purge Volume Control Valve ........1063
Heated Oxygen Sensor 2 (Rear) Heater...............1063
Crankshaft Position Sensor (OBD)........................1063
YD22DDTI
TROUBLE DIAGNOSIS - INDEX..............................1064
Alphabetical & P No. Index for DTC .....................1064
PRECAUTIONS.........................................................1066
Precautions for Supplemental Restraint System
(SRS)²AIR BAG²and²SEAT BELT
PRE-TENSIONER²................................................1066
Engine Fuel & Emission Control System ..............1066
Wiring Diagrams and Trouble Diagnosis ...............1069
PREPARATION.........................................................1070
Special Service Tools ............................................1070
ENGINE AND EMISSION CONTROL OVERALL
SYSTEM.....................................................................1071
Engine Control Component Parts Location ...........1071
Circuit Diagram ......................................................1074
System Diagram ....................................................1076
Vacuum Hose Drawing ..........................................1077
System Chart .........................................................1078
ENGINE AND EMISSION BASIC CONTROL
SYSTEM DESCRIPTION...........................................1079
Fuel Injection Control System ...............................1079
Fuel Injection Timing Control System....................1080
Air Conditioning Cut Control ..................................1081
Fuel Cut Control (at no load & high engine
speed) ....................................................................1081
Crankcase Ventilation System ...............................1082
BASIC SERVICE PROCEDURE...............................1083
Injection Tube and Injection Nozzle ......................1083
Electronic Control Fuel Injection Pump .................1087
Fuel Filter ...............................................................1094
ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION...........................................................1096
DTC and MI Detection Logic .................................1096
Diagnostic Trouble Code (DTC) ............................1096
NATS (Nissan Anti-Theft System) .........................1097
Malfunction Indicator (MI) ......................................1097
CONSULT-II ........................................................... 1102
CONTENTS(Cont'd)
EC-12 

SYMPTOM
Reference
page
HARD/NO START/RESTART (EXCP. HA)
ENGINE STALL
HESITATION/SURGING/FLAT SPOT
SPARK KNOCK/DETONATION
LACK OF POWER/POOR ACCELERATION
HIGH IDLE/LOW IDLE
ROUGH IDLE/HUNTING
IDLING VIBRATION
SLOW/NO RETURN TO IDLE
OVERHEATS/WATER TEMPERATURE HIGH
EXCESSIVE FUEL CONSUMPTION
EXCESSIVE OIL CONSUMPTION
BATTERY DEAD (UNDER CHARGE)
Warranty symptom code AA AB AC AD AE AF AG AH AJ AK AL AM HA
Engine Cylinder head
55555 55 5
EM section Cylinder head gasket 4 3
Cylinder block
66666 66 64 Piston
Piston ring
Connecting rod
Bearing
Crankshaft
Valve
mecha-
nismTiming chain
55555 55 5 EMsection Camshaft
Intake valve
3
Exhaust valve
Exhaust Exhaust manifold/Tube/Muffler/
Gasket
55555 55 5 FEsection
Three way catalyst
Lubrica-
tionOil pan/Oil strainer/Oil pump/Oil
filter/Oil gallery
55555 55 5MA, EM and
LC sections
Oil level (Low)/Filthy oil
LC section Cooling Radiator/Hose/Radiator filler cap
55555 55 45 Thermostat 5
Water pump
Water gallery
Cooling fan 5 EC-373
Coolant level (low)/Contaminated
coolantMA section
1 - 6: The numbers refer to the order of inspection.
TROUBLE DIAGNOSIS Ð GENERAL DESCRIPTIONQG18DE
Symptom Matrix Chart (Cont'd)
EC-127 

SYMPTOM
Reference
page
HARD/NO START/RESTART (EXCP. HA)
ENGINE STALL
HESITATION/SURGING/FLAT SPOT
SPARK KNOCK/DETONATION
LACK OF POWER/POOR ACCELERATION
HIGH IDLE/LOW IDLE
ROUGH IDLE/HUNTING
IDLING VIBRATION
SLOW/NO RETURN TO IDLE
OVERHEATS/WATER TEMPERATURE HIGH
EXCESSIVE FUEL CONSUMPTION
EXCESSIVE OIL CONSUMPTION
BATTERY DEAD (UNDER CHARGE)
Warranty symptom code AA AB AC AD AE AF AG AH AJ AK AL AM HA
Engine Cylinder head
55555 55 5
EM section Cylinder head gasket 4 3
Cylinder block
66666 66 64 Piston
Piston ring
Connecting rod
Bearing
Crankshaft
Valve
mecha-
nismTiming chain
55555 55 5 EMsection Camshaft
Intake valve
3
Exhaust valve
Exhaust Exhaust manifold/Tube/Muffler/
Gasket
55555 55 5 FEsection
Three way catalyst
Lubrica-
tionOil pan/Oil strainer/Oil pump/Oil
filter/Oil gallery
55555 55 5MA, EM and
LC sections
Oil level (Low)/Filthy oil
LC section Cooling Radiator/Hose/Radiator filler cap
55555 55 45 Thermostat 5
Water pump
Water gallery
Cooling fan 5 EC-882
Coolant level (low)/Contaminated
coolantMA section
1 - 6: The numbers refer to the order of inspection.
TROUBLE DIAGNOSIS Ð GENERAL DESCRIPTIONSR20DE
Symptom Matrix Chart (Cont'd)
EC-651 

ENGINE MECHANICAL
SECTION
EM
CONTENTS
QG
PRECAUTIONS...............................................................5
Parts Requiring Angular Tightening .............................5
Liquid Gasket Application Procedure ..........................5
PREPARATION...............................................................6
Special Service Tools ..................................................6
Commercial Service Tools ...........................................8
NOISE, VIBRATION AND HARSHNESS (NVH)
TROUBLESHOOTING...................................................10
NVH Troubleshooting - Engine Noise .......................10
OUTER COMPONENT PARTS.....................................12
Removal and Installation ...........................................12
MEASUREMENT OF COMPRESSION PRESSURE....16
DRIVE BELTS................................................................17
Checking ....................................................................17
AIR CLEANER...............................................................18
Changing Air Cleaner Filter .......................................18
VISCOUS PAPER TYPE...........................................18
SPARK PLUG................................................................19
Checking and Changing ............................................19
OIL PAN.........................................................................20
Components...............................................................20
Removal .....................................................................20
Installation ..................................................................21
TIMING CHAIN..............................................................22
Components...............................................................22
Removal .....................................................................23
Inspection...................................................................26
Installation ..................................................................27
OIL SEAL.......................................................................31
Replacement ..............................................................31
VALVE OIL SEAL.....................................................31
FRONT OIL SEAL....................................................31
REAR OIL SEAL......................................................32
CYLINDER HEAD..........................................................33
Components...............................................................33
Removal .....................................................................34
Disassembly...............................................................36Inspection...................................................................36
CYLINDER HEAD DISTORTION...............................36
CAMSHAFT VISUAL CHECK....................................36
CAMSHAFT RUNOUT..............................................37
CAMSHAFT CAM HEIGHT.......................................37
CAMSHAFT JOURNAL CLEARANCE........................37
CAMSHAFT END PLAY............................................38
CAMSHAFT SPROCKET RUNOUT...........................38
VALVE GUIDE CLEARANCE....................................38
VALVE GUIDE REPLACEMENT................................39
VALVE SEATS.........................................................40
REPLACING VALVE SEAT FOR SERVICE PARTS....40
VALVE DIMENSIONS...............................................41
VALVE SPRING.......................................................41
VALVE LIFTER AND VALVE SHIM............................41
Valve Clearance.........................................................42
CHECKING.............................................................42
ADJUSTING............................................................43
Assembly ...................................................................45
Installation ..................................................................45
ENGINE ASSEMBLY.....................................................49
Removal and Installation ...........................................49
REMOVAL...............................................................50
INSTALLATION........................................................51
CYLINDER BLOCK.......................................................52
Components...............................................................52
Removal and Installation ...........................................53
Disassembly...............................................................53
PISTON AND CRANKSHAFT....................................53
Inspection...................................................................54
PISTON AND PISTON PIN CLEARANCE..................54
PISTON RING SIDE CLEARANCE............................54
PISTON RING END GAP..........................................54
CONNECTING ROD BEND AND TORSION...............55
CYLINDER BLOCK DISTORTION AND WEAR...........55
PISTON-TO-BORE CLEARANCE..............................56
CRANKSHAFT.........................................................57
BEARING CLEARANCE...........................................57
CONNECTING ROD BUSHING CLEARANCE
(SMALL END)
..........................................................59 

REPLACEMENT OF CONNECTING ROD
BUSHING (SMALL END)
..........................................60
FLYWHEEL RUNOUT..............................................60
Assembly ...................................................................60
PISTON..................................................................60
CRANKSHAFT.........................................................61
SERVICE DATA AND SPECIFICATIONS (SDS).........64
General Specifications ...............................................64
Compression Pressure ..............................................64
Belt Deflection............................................................64
Spark Plug .................................................................65
Cylinder Head ............................................................65
Valve ..........................................................................65
VALVE....................................................................65
VALVE SPRING.......................................................65
VALVE LIFTER........................................................66
VALVE CLEARANCE................................................67
VALVE GUIDE.........................................................67
AVAILABLE SHIMS..................................................67
VALVE SEAT...........................................................70
VALVE SEAT RESURFACE LIMIT.............................71
Camshaft and Camshaft Bearing ..............................71
Cylinder Block ............................................................72
Piston, Piston Ring and Piston Pin ...........................73
PISTON..................................................................73
PISTON RING.........................................................73
PISTON PIN............................................................73
Connecting Rod .........................................................74
Crankshaft..................................................................74
Main Bearing..............................................................74
STANDARD.............................................................74
UNDERSIZE............................................................74
Connecting Rod Bearing ...........................................75
STANDARD SIZE....................................................75
UNDERSIZE............................................................75
Bearing Clearance .....................................................75
Miscellaneous Components.......................................75
SR
PRECAUTIONS.............................................................76
Parts Requiring Angular Tightening ...........................76
Liquid Gasket Application Procedure ........................76
PREPARATION.............................................................77
Special Service Tools ................................................77
Commercial Service Tools .........................................79
NOISE, VIBRATION AND HARSHNESS (NVH)
TROUBLESHOOTING...................................................80
NVH Troubleshooting - Engine Noise .......................81
OUTER COMPONENT PARTS.....................................82
Removal and Installation ...........................................82
MEASUREMENT OF COMPRESSION PRESSURE....85
DRIVE BELTS................................................................86
Checking ....................................................................86AIR CLEANER...............................................................88
Changing Air Cleaner Filter .......................................88
VISCOUS PAPER TYPE...........................................88
SPARK PLUG................................................................89
Checking and Changing Spark Plugs .......................89
Checking Ignition Leads ............................................90
OIL PAN.........................................................................91
Components...............................................................91
Removal .....................................................................91
Installation ..................................................................93
TIMING CHAIN..............................................................96
Components...............................................................96
Removal .....................................................................97
Inspection.................................................................100
Installation ................................................................100
OIL SEAL.....................................................................105
Replacement ............................................................105
VALVE OIL SEAL...................................................105
FRONT OIL SEAL..................................................105
REAR OIL SEAL....................................................107
CYLINDER HEAD........................................................108
Components.............................................................108
Removal ...................................................................109
Disassembly............................................................. 111
Inspection................................................................. 113
CYLINDER HEAD DISTORTION............................. 113
CAMSHAFT VISUAL CHECK.................................. 114
CAMSHAFT RUNOUT............................................ 114
CAMSHAFT CAM HEIGHT..................................... 114
CAMSHAFT JOURNAL CLEARANCE...................... 115
CAMSHAFT END PLAY.......................................... 115
CAMSHAFT SPROCKET RUNOUT......................... 116
VALVE GUIDE CLEARANCE.................................. 116
VALVE GUIDE REPLACEMENT.............................. 116
VALVE SEATS....................................................... 117
REPLACING VALVE SEAT FOR SERVICE PARTS.. 118
VALVE DIMENSIONS............................................. 119
VALVE SPRING..................................................... 119
HYDRAULIC LASH ADJUSTER.............................. 119
ROCKER ARM, SHIM AND ROCKER ARM GUIDE...120
Assembly .................................................................120
Installation ................................................................123
ENGINE ASSEMBLY...................................................130
Removal and Installation .........................................130
REMOVAL.............................................................131
INSTALLATION......................................................132
CYLINDER BLOCK.....................................................133
Components.............................................................133
Removal and Installation .........................................134
Disassembly.............................................................134
PISTON AND CRANKSHAFT..................................134
Inspection.................................................................134
PISTON AND PISTON PIN CLEARANCE................134
PISTON RING SIDE CLEARANCE..........................135
CONTENTS(Cont'd)
EM-2 

PISTON RING END GAP........................................135
CONNECTING ROD BEND AND TORSION.............136
CYLINDER BLOCK DISTORTION AND WEAR.........136
PISTON-TO-BORE CLEARANCE............................137
CRANKSHAFT.......................................................138
BEARING CLEARANCE.........................................138
CONNECTING ROD BUSHING CLEARANCE
(SMALL END)
........................................................141
REPLACEMENT OF CONNECTING ROD
BUSHING (SMALL END)
........................................141
REPLACEMENT OF PILOT CONVERTER (CVT).....141
DRIVE PLATE RUNOUT........................................142
Assembly .................................................................142
PISTON................................................................142
CRANKSHAFT.......................................................143
SERVICE DATA AND SPECIFICATIONS (SDS).......146
General Specifications .............................................146
Compression Pressure ............................................146
Cylinder Head ..........................................................146
Valve ........................................................................147
VALVE..................................................................147
VALVE SPRING.....................................................147
HYDRAULIC LASH ADJUSTER (HLA).....................147
VALVE GUIDE.......................................................148
VALVE SHIM CLEARANCE ADJUSTMENT..............148
AVAILABLE SHIM..................................................149
VALVE SEAT.........................................................150
Camshaft and Camshaft Bearing ............................151
Cylinder Block ..........................................................152
Piston, Piston Ring and Piston Pin .........................153
PISTON................................................................153
PISTON RING.......................................................153
PISTON PIN..........................................................153
Connecting Rod .......................................................154
Crankshaft................................................................155
Main Bearing............................................................156
STANDARD...........................................................156
UNDERSIZE..........................................................156
Connecting Rod Bearing .........................................156
STANDARD SIZE..................................................156
UNDERSIZE..........................................................156
Bearing Clearance ...................................................157
Miscellaneous Components.....................................157
YD
PRECAUTIONS...........................................................158
Parts Requiring Angular Tightening .........................158
Liquid Gasket Application Procedure ......................158
PREPARATION...........................................................159
Special Service Tools ..............................................159
Commercial Service Tools .......................................161
NOISE, VIBRATION AND HARSHNESS (NVH)
TROUBLESHOOTING.................................................163
NVH Troubleshooting - Engine Noise .....................163MEASUREMENT OF COMPRESSION PRESSURE..164
DRIVE BELTS..............................................................166
Inspection.................................................................166
Adjustment ...............................................................166
AIR CONDITIONER COMPRESSOR BELT..............167
ALTERNATOR & WATER PUMP BELT...................167
Removal ...................................................................167
Installation ................................................................168
AIR CLEANER.............................................................169
Changing Air Cleaner Filter .....................................169
VISCOUS PAPER TYPE.........................................169
OIL PAN.......................................................................170
Components.............................................................170
Removal ...................................................................170
Installation ................................................................172
TIMING CHAIN............................................................175
Secondary Timing Chain .........................................175
REMOVAL.............................................................175
INSPECTION.........................................................177
INSTALLATION......................................................177
Primary Timing Chain ..............................................180
REMOVAL.............................................................181
INSPECTION.........................................................183
INSTALLATION......................................................183
INTAKE MANIFOLD....................................................188
Removal and Installation .........................................188
PREPARATIVE WORK...........................................188
FUEL PIPING........................................................189
INTAKE MANIFOLD...............................................189
EGR VOLUME CONTROL VALVE...........................189
WATER HOSE.......................................................189
Inspection.................................................................190
INTAKE MANIFOLD...............................................190
SWIRL CONTROL VALVE......................................190
CATALYST..................................................................191
Removal and Installation .........................................191
PREPARATIVE WORK...........................................191
THREE WAY CATALYST.......................................191
GUSSET...............................................................192
EXHAUST MANIFOLD, TURBOCHARGER...............193
Removal and Installation .........................................193
PREPARATIVE WORK...........................................193
EXHAUST MANIFOLD AND TURBOCHARGER.......193
EXHAUST MANIFOLD GASKET.............................194
Disassembly and Assembly .....................................194
TURBOCHARGER.................................................194
Inspection.................................................................195
EXHAUST MANIFOLD...........................................195
TURBOCHARGER.................................................195
ROCKER COVER........................................................198
Removal and Installation .........................................198
PREPARATIVE WORK...........................................198
ROCKER COVER..................................................198
CYLINDER HEAD........................................................200
CONTENTS(Cont'd)
EM-3 

Removal and InstallationNLEM0006
YEM002
1. Oil pressure switch
2. EGR valve
3. EGR tube
4. Air relief plug
5. Intake manifold6. Intake manifold upper support
7. Intake manifold lower supports
8. Oil filter
9. Thermostat
10. Water pump11. Water pump pulley
12. EGR solenoid valve
13. EGR guide tube
14. EGR gas temperature sensor
OUTER COMPONENT PARTSQG
Removal and Installation
EM-12 

Removal and InstallationNLEM0117
NEM351
1. Oil filler cap
2. Rocker cover
3. PCV valve
4. Distributor
5. Intake manifold supports6. Knock sensor
7. Oil filter
8. Oil filter bracket
9. Water inlet
10. Thermostat housing11. Water pipe assembly
12. Thermostat
13. Starter motor
14. Power steering oil pump adjusting
bar
15. Power steering oil pump bracket
OUTER COMPONENT PARTSSR
Removal and Installation
EM-82