1998 NISSAN PATROL sensor

ENGINE CONTROL SYSTEMSECTION
EC
CONTENTS
DIAGNOSTIC TROUBLE CODE INDEX .........................1
Alphabetical & Numerical Index for DTC ....................1
PRECAUTIONS AND PREPARATION ............................2
Special Service Tools ..................................................2
Commercial Service Tool .............................................3
Supplemental Restraint System (SRS) ``AIR
BAG'' and ``SEAT BELT PRE-TENSIONER''...............4
PRECAUTIONS AND PREPARATION ............................5
Engine Fuel & Emission Control System ....................5
Precautions ..................................................................6
ENGINE AND EMISSION CONTROL OVERALL
SYSTEM ........................................................................\
...8
ECCS-D Component Parts Location ...........................8
Circuit Diagram .......................................................... 11
System Diagram ........................................................12
Vacuum Hose Drawing ..............................................13
System Chart .............................................................14
ENGINE AND EMISSION BASIC CONTROL
SYSTEM DESCRIPTION ...............................................15
Fuel Injection System ................................................15
Fuel Injection Timing System ....................................18
Air Conditioning Cut Control ......................................19
Fuel Cut Control (at no load & high engine
speed) ........................................................................\
20
CRANKCASE VENTILATION SYSTEM ........................21
Description .................................................................21
Inspection...................................................................21
INJECTION NOZZLE .....................................................22
Removal and Installation ...........................................22
Disassembly (No. 2 - 4 nozzles) ...............................22
Inspection (No. 2 - 4 nozzles) ...................................23
Cleaning (No. 2 - 4 nozzles) .....................................23
Assembly (No. 2 - 4 nozzles) ....................................24
Test and Adjustment ..................................................25
ELECTRONIC FUEL INJECTION PUMP ......................27
Removal .....................................................................27
Installation ..................................................................28
Disassembly and Assembly .......................................29
ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION ...............................................................30
DTC and MIL Detection Logic ...................................30
Diagnostic Trouble Code (DTC) ................................30 Malfunction Indicator Lamp (MIL) ..............................31
CONSULT ..................................................................36
TROUBLE DIAGNOSIS Ð Introduction ......................42
Introduction ................................................................42
Diagnostic Worksheet ................................................43
TROUBLE DIAGNOSIS Ð Work Flow ........................44
Work Flow ..................................................................44
Description for Work Flow .........................................45
TROUBLE DIAGNOSIS Ð Basic Inspection ..............46
Basic Inspection.........................................................46
TROUBLE DIAGNOSIS Ð General Description ........48
Symptom Matrix Chart ...............................................48
CONSULT Reference Value in Data Monitor
Mode ........................................................................\
..51
Major Sensor Reference Graph in Data Monitor
Mode ........................................................................\
..53
ECM Terminals and Reference Value .......................54
TROUBLEDIAGNOSISFORPOWERSUPPLY ..........63
MainPowerSupplyandGroundCircuit....................63
TROUBLE DIAGNOSIS FOR ``CAM POS SEN
(PUMP)''(DTC11) .........................................................69
CamshaftPositionSensor(CMPS)(PUMP).............69
TROUBLEDIAGNOSISFOR``MASSAIRFLOW
SEN''(DTC12) ..............................................................74
MassAirFlowSensor(MAFS)..................................74
TROUBLEDIAGNOSISFOR``COOLANTTEMP
SEN''(DTC13) ..............................................................79
EngineCoolantTemperature(ECT)Sensor.............79
TROUBLEDIAGNOSISFOR``VEHICLESPEED
SEN''(DTC14) ..............................................................83
VehicleSpeedSensor(VSS)....................................83
TROUBLEDIAGNOSISFOR``CONTSLEEVPOS
SEN''(DTC15) ..............................................................87
ControlSleevePositionSensor(CSPS)...................87
TROUBLEDIAGNOSISFOR``ADJUST
RESISTOR''(DTC17) ...................................................92
AdjustmentResistor...................................................92
TROUBLEDIAGNOSISFOR``F/INJF/B2''
(DTC18),``F/INJF/B''(DTC22),``ELECTRIC
GOV''(DTC25) ..............................................................96
ElectricGovernor.......................................................96
EC

TROUBLEDIAGNOSISFOR``F/INJTIMGF/B''
(DTC21).......................................................................101
InjectionTimingControlValve.................................101
TROUBLEDIAGNOSISFOR``ACCELPOSSW
(F/C)''(DTC23) ...........................................................106
AcceleratorSwitch(F/C)..........................................106
TROUBLEDIAGNOSISFOR``ECM1''(DTC27),
``ECM2''(DTC31) .......................................................111
EngineControlModule(ECM)-ECCS-DControl
Module.....................................................................111
TROUBLEDIAGNOSISFOR``OVERHEAT''
(DTC28) .......................................................................113
CoolingFan(Overheat)...........................................113
TROUBLEDIAGNOSISFOR``I/CINT/ATEMP
SEN''(DTC33) ............................................................122
ChargeAirTemperatureSensor..............................122
TROUBLEDIAGNOSISFOR``NEEDLELIFT
SEN''(DTC34) ............................................................126
NeedleLiftSensor(NLS)........................................126
TROUBLE DIAGNOSIS FOR ``FUEL CUT S/V 1''
(DTC 36), ``FCV SHORT'' (DTC 37), ``FUEL CUT
S/V2''(DTC38) ...........................................................130
FuelCutSolenoidValve..........................................130
TROUBLE DIAGNOSIS FOR ``FUEL TEMP
SENSOR''(DTC42) ....................................................135
FuelTemperatureSensor(FTS)..............................135 TROUBLE DIAGNOSIS FOR ``ACCEL POS
SENSOR''(DTC43)
....................................................139
AcceleratorPositionSensor....................................139
TROUBLE DIAGNOSIS FOR ``CRANK POS SEN
(TDC)''(DTC47) ..........................................................144
CrankshaftPositionSensor(TDC)..........................144
TROUBLEDIAGNOSISFOR``GOVCUT
CIRCUIT''(DTC48) .....................................................149
GovernorCutCircuit................................................149
TROUBLEDIAGNOSESFORNON-DETECTABLE
ITEMS ........................................................................\
...151
GlowControlSystem...............................................151
EGRC-SolenoidValveA,BandThrottleControl
SolenoidValve.........................................................156
StartSignal..............................................................163
AcceleratorPositionSwitch.....................................165
Park/NeutralPositionSwitch...................................170
A/TControl...............................................................175
ChargeAirCoolerFanControl................................178
HeatUpSwitch........................................................183
AirConditionerControl............................................187
MIL&DataLinkConnectors...................................188
SERVICEDATAANDSPECIFICATIONS(SDS) ........189
GeneralSpeci®cations.............................................189
InjectionNozzle.......................................................189
InspectionandAdjustment......................................189
When you read wiring diagrams:
+ Read GI section, ``HOW TO READ WIRING DIAGRAMS''.
+ See EL section, ``POWER SUPPLY ROUTING'' for power distribution circuit.
When you perform trouble diagnoses, read GI section, ``HOW TO FOLLOW FLOW CHART IN
TROUBLE DIAGNOSES'' and ``HOW TO PERFORM EFFICIENT DIAGNOSIS FOR AN ELECTRICAL
INCIDENT''.

Alphabetical & Numerical Index for DTC
ALPHABETICAL INDEX FOR DTC
X: Applicable
Ð: Not applicable
Items
(CONSULT screen terms) DTCMIL
illumination Reference
page
ACCEL POS SENSOR 43 X EC-139
ACCEL POS SW (F/C) 23 X EC-106
ADJUST RESISTOR 17 Ð EC-92
CAM POS SEN (PUMP) 11 X EC-69
CONT SLEEV POS SEN 15 X EC-87
COOLANT TEMP SEN 13 X EC-79
CRANK POS SEN (TDC) 47 X EC-144
ECM 1 27 X EC-111
ECM 2 31 X EC-111
ELECTRIC GOV 25 X EC-96
FCV SHORT 37 X EC-130
FUEL CUT S/V 1 36 X EC-130
FUEL CUT S/V 2 38 X EC-130
FUEL TEMP SENSOR 42 Ð EC-135
F/INJ F/B 22 X EC-96
F/INJ F/B 2 18 X EC-96
F/INJ TIMG F/B 21 Ð EC-101
GOV CUT CIRCUIT 48 X EC-149
I/C INT/A TEMP SEN 33 *1 Ð EC-122
MAS AIR FLOW SEN 12 Ð EC-74
NATS MALFUNCTION 141 - 148 X EL section*
NEEDLE LIFT SEN 34 Ð EC-126
NO SELF DIAGNOSTIC
FAILURE INDICATED 55 Ð Ð
OVER HEAT 28 X EC-113
VEHICLE SPEED SEN 14 Ð EC-83
NUMERICAL INDEX FOR DTC
X: Applicable
Ð: Not applicable
DTC MIL
illumination Items
(CONSULT screen terms) Reference
page
11 X CAM POS SEN (PUMP) EC-69
12 Ð MAS AIR FLOW SEN EC-74
13 X COOLANT TEMP SEN EC-79
14 Ð VEHICLE SPEED SEN EC-83
15 X CONT SLEEV POS SEN EC-87
17 Ð ADJUST RESISTOR EC-92
18 X F/INJ F/B 2 EC-96
21 Ð F/INJ TIMG F/B EC-101
22 X F/INJ F/B EC-96
23 X ACCEL POS SW (F/C) EC-106
25 X ELECTRIC GOV EC-96
27 X ECM 1 EC-111
28 X OVER HEAT EC-113
31 X ECM 2 EC-111
33 *1 Ð I/C INT/A TEMP SEN EC-122 34 Ð NEEDLE LIFT SEN EC-126
36 X FUEL CUT S/V 1 EC-130
37 X FCV SHORT EC-130
38 X FUEL CUT S/V 2 EC-130
42 Ð FUEL TEMP SENSOR EC-135
43 X ACCEL POS SENSOR EC-139
47 X CRANK POS SEN (TDC) EC-144
48 X GOV CUT CIRCUIT EC-149
55 Ð NO SELF DIAGNOSTIC
FAILURE INDICATED Ð
141 - 148 X NATS MALFUNCTION EL section*2
*1: When nothing is displayed or the meaningless symbol is displayed in the ``Self-diag result'' mode with CONSULT, perform ``Diagnostic Test Mode II (Self-diagnostic results)'' with ECM. Refer to EC-32.
*2: Refer to ``NATS (Nissan Anti-Theft System)'' in EL section.
DIAGNOSTIC TROUBLE CODE INDEX
EC-1

Supplemental Restraint System (SRS) ``AIR
BAG'' and ``SEAT BELT PRE-TENSIONER''
The Supplemental Restraint System such as ``AIR BAG'' and ``SEAT BELT PRE-TENSIONER'' used along with
a seat belt, helps to reduce the risk or severity of injury to the driver and front passenger in a frontal collision.
The SRS system composition which is available to NISSAN MODEL Y61 is as follows (The composition var-
ies according to the destination.):
Driver air bag module (located in the center of the steering wheel), front passenger air bag module (located
on the instrument panel on passenger side), seat belt pre-tensioner, a diagnosis sensor unit, warning lamp,
wiring harness and spiral cable.
Information necessary to service the system safely is included in theRS sectionof this Service Manual.
WARNING:
+To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death
in the event of a collision which would result in air bag in¯ation, all maintenance must be performed
by an authorized NISSAN dealer.
+Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air
Bag Module, see the RS section.
+Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. Spiral cable and wiring harnesses covered with yellow insulation either just before
the harness connectors or for the complete harness are related to the SRS.
PRECAUTIONS AND PREPARATION
EC-4

System Chart
Camshaft position sensor (PUMP)c
ECM
(ECCS-D
control
module)
Crankshaft position sensor (TDC)c
Control sleeve position sensorc
Fuel temperature sensorc
Engine coolant temperature sensorc
Needle lift sensorc
Accelerator position sensorc
Accelerator position switchc
Accelerator switch (F/C)c
Neutral position switchc
Ignition switchc
Battery voltagec
Vehicle speed sensorc
Air conditioner switchc
Mass air ¯ow sensorc
Charge air temperature sensorc
Heat up switchc
Fuel injection controlcElectric governor
Fuel injection timing controlcInjection timing control valve
Fuel cut controlcFuel cut solenoid valve
Glow control systemcGlow relay & glow lamp
On board diagnostic systemcMalfunction indicator lamp
(On the instrument panel)
EGR valve & throttle control
valve controlcEGRC-solenoid valve A, B &
throttle control solenoid valve
Cooling fan controlcCooling fan relay
Air conditioning cut controlcAir conditioner relay
Charge air cooler fan controlcCharge air cooler fan relay
ENGINE AND EMISSION CONTROL OVERALL SYSTEM
EC-14

Fuel Injection System
SYSTEM DESCRIPTION
Three types of fuel injection control are provided to accommodate engine operating conditions; normal control,
idle control and start control. The ECM determines the appropriate fuel injection control. Under each control,
the amount of fuel injected is compensated to improve engine performance. The ECM performs duty control
on the electric governor (built into the fuel injection pump) according to sensor signals to compensate the
amount of fuel injected to the preset value.
START CONTROL
Input/output signal line
Engine coolant temperature sensorcEngine coolant temperature
ECM
cElectric
governorCrankshaft position sensor (TDC)cEngine speed
Ignition switch
cStart signal
Control sleeve position sensor
cControl sleeve position
When the ECM receives a start signal from the ignition switch, the
ECM adapts the fuel injection system for the start control. The
amount of fuel injected at engine starting is a preset program value
in the ECM. The program is determined by the engine speed and
engine coolant temperature.
For better startability under cool engine conditions, the lower the
coolant temperature becomes, the greater the amount of fuel
injected. The ECM ends the start control when the engine speed
reaches 400 rpm (for M/T models), 600 rpm (for A/T models) and
shifts the control to the normal or idle control.
SEF648S
ENGINE AND EMISSION BASIC CONTROL SYSTEM DESCRIPTION
EC-15

IDLE CONTROL
Input/output signal line
Engine coolant temperature sensorcEngine coolant temperature
ECM
cElectric
governor
Crankshaft position sensor (TDC)cEngine speed
Neutral position switch
cGear position
Battery
cBattery voltage
Control sleeve position sensor
cControl sleeve position
Accelerator position switch
cIdle position
Vehicle speed sensor
cVehicle speed
Air conditioner switch
cAir conditioner signal
Heat up switch
cHeat up switch signal
When the ECM determines that the engine speed is at idle, the fuel injection system is adapted for the idle
control. The ECM regulates the amount of fuel injected corresponding to changes in load applied to the engine
to keep engine speed constant. The ECM also provides the system with a fast idle control in response to the
engine coolant temperature and heat up switch signal.
NORMAL CONTROL
Input/output signal line
Crankshaft position sensor (TDC)cEngine speed
ECM
cElectric
governorControl sleeve position sensorcControl sleeve position
Accelerator position sensor
cAccelerator position
Vehicle speed sensor
cVehicle speed
The amount of fuel injected under normal driving conditions is
determined according to sensor signals. The crankshaft position
sensor (TDC) detects engine speed and the accelerator position
sensor detects accelerator position. These sensors send signals to
the ECM.
The fuel injection data, predetermined by correlation between vari-
ous engine speeds and accelerator positions, are stored in the
ECM memory, forming a map. The ECM determines the optimal
amount of fuel to be injected using the sensor signals in compari-
son with the map.
SEF649S
ENGINE AND EMISSION BASIC CONTROL SYSTEM DESCRIPTION
Fuel Injection System (Cont'd)
EC-16

FUEL TEMPERATURE COMPENSATION
Input/output signal line
Fuel temperature sensorcFuel temperature
ECM
cElectric
governorCrankshaft position sensor (TDC)cEngine speed
Control sleeve position sensor
cControl sleeve position
The amount of fuel leaking at or around high-pressure parts inside fuel injection pump varies with fuel tem-
perature and engine speed. This will result in a difference between the target amount of fuel injected and the
actual amount. The ECM compensates for the actual amount depending on the signal from the fuel tempera-
ture sensor which detects fuel temperature.
DECELERATION CONTROL
Input/output signal line
Accelerator switch (F/C)cAccelerator position
ECM
cElectric
governor
Camshaft position sensor (PUMP)cEngine speed
The ECM cuts power supply delivery to the electric governor during deceleration for better fuel efficiency. The
ECM determines the time of deceleration according to signals from the accelerator switch (F/C) and camshaft
position sensor (PUMP).
ENGINE AND EMISSION BASIC CONTROL SYSTEM DESCRIPTION
Fuel Injection System (Cont'd)
EC-17