1999 NISSAN PRIMERA engine coolant

CONSULT-II Reference Value in Data Monitor
Mode ........................................................................306
ECM Terminals and Reference Value .....................306
Wiring Diagram ........................................................308
Diagnostic Procedure ..............................................309
Component Inspection .............................................310
START SIGNAL...........................................................312
CONSULT-II Reference Value in Data Monitor
Mode ........................................................................312
ECM Terminals and Reference Value .....................312
Wiring Diagram ........................................................313
Diagnostic Procedure ..............................................314
FUEL PUMP.................................................................316
System Description ..................................................316
Component Description ...........................................316
CONSULT-II Reference Value in Data Monitor
Mode ........................................................................316
ECM Terminals and Reference Value .....................316
Wiring Diagram ........................................................317
Diagnostic Procedure ..............................................318
Component Inspection .............................................320
POWER STEERING OIL PRESSURE SWITCH.........321
Component Description ...........................................321
CONSULT-II Reference Value in Data Monitor
Mode ........................................................................321
ECM Terminals and Reference Value .....................321
Wiring Diagram ........................................................322Diagnostic Procedure ..............................................323
Component Inspection .............................................324
ELECTRICAL LOAD SIGNAL.....................................325
CONSULT-II Reference Value in Data Monitor
Mode ........................................................................325
ECM Terminals and Reference Value .....................325
Wiring Diagram ........................................................326
MI & DATA LINK CONNECTORS..............................329
Wiring Diagram ........................................................329
SERVICE DATA AND SPECIFICATIONS (SDS).......330
Fuel Pressure Regulator..........................................330
Idle Speed and Ignition Timing ................................330
Ignition Coil ..............................................................330
Mass Air Flow Sensor..............................................330
Engine Coolant Temperature Sensor ......................330
Fuel Pump ...............................................................330
IACV-AAC Valve ......................................................330
Injector .....................................................................330
Throttle Position Sensor ..........................................331
Heated Oxygen Sensor 1 (Front) Heater ................331
Intake Air Temperature Sensor ................................331
EVAP Canister Purge Volume Control Valve ..........331
Heated Oxygen Sensor 1 (Rear) Heater.................331
Crankshaft Position Sensor (OBD)..........................331
CONTENTS(Cont'd)
EC-5

Alphabetical & P No. Index for DTCNCEC0001ALPHABETICAL INDEX FOR DTCNCEC0001S01
Items
(CONSULT-II screen terms)DTC*6
Reference page
CONSULT-II
GST*2ECM*1
Unable to access ECM Ð Ð EC-SR-93
AIR TEMP SEN/CIRC *7 P0110 0110 EC-SR-127
A/T DIAG COMM LINE *7 P1605 1605 EC-SR-295
ATF TEMP SEN/CIRC *7 P0710 0710 Refer to AT section.
CAM POS SEN/CIRC P0340 0340 EC-SR-239
CLOSED TP SW/CIRC *7 P0510 0510 EC-SR-271
COOLANT T SEN/CIRC P0115 0115 EC-SR-132
CPS/CIRC (OBD) COG *7 P1336 1336 EC-SR-290
CPS/CIRCUIT (OBD) *7 P0335 0335 EC-SR-234
CYL 1 MISFIRE *7 P0301 0301 EC-SR-224
CYL 2 MISFIRE *7 P0302 0302 EC-SR-224
CYL 3 MISFIRE *7 P0303 0303 EC-SR-224
CYL 4 MISFIRE *7 P0304 0304 EC-SR-224
ECM *7 P0605 0605 EC-SR-277
ENGINE SPEED SIG *7 P0725 0725 Refer to AT section.
LINE PRESS SE *7 P1791 1791 Refer to AT section.
HO2S1 HTR (B1) P0135 0135 EC-SR-175
HO2S1 (B1) P0130 0130 EC-SR-144
HO2S1 (B1) *7 P0131 0131 EC-SR-150
HO2S1 (B1) *7 P0132 0132 EC-SR-156
HO2S1 (B1) *7 P0133 0133 EC-SR-162
HO2S1 (B1) *7 P0134 0134 EC-SR-170
FUEL SYS -LEAN/BK1 *7 P0171 0171 EC-SR-212
FUEL SYS -RICH/BK1 *7 P0172 0172 EC-SR-218
IACV/AAC VLV/CIRC *7 P0505 0505 EC-SR-263
IN PY SPD SEN/CIRC *7 P0715 0715 Refer to AT section.
KNOCK SEN/CIRC -B1 P0325 0325 EC-SR-230
L/PRESS SOL/CIRC *7 P0745 0745 Refer to AT section.
MAF SEN/CIRCUIT *3 P0100 0100 EC-SR-120
MULTI CYL MISFIRE *7 P0300 0300 EC-SR-224
NATS MALFUNCTION P1610 - P1615 1610 - 1615 Refer to EL section.
NO SELF DIAGNOSTIC FAILURE INDICATED P0000 0000 Ð
NO SELF DIAGNOSTIC FAILURE INDICATED No DTC Flashing*5 EC-SR-59
ENG OVER TEMP P1217 1217 EC-SR-279
P-N POS SW/CIRCUIT *7 P1706 1706 EC-SR-298
TROUBLE DIAGNOSIS Ð INDEXSR20DE
Alphabetical & P No. Index for DTC
EC-6

Items
(CONSULT-II screen terms)DTC*6
Reference page
CONSULT-II
GST*2ECM*1
PNP SW/CIRC *7 P0705 0705 Refer to AT section.
PURG VOLUME CONT/V *7 P0443 0443 EC-SR-250
HO2S2 (B1) *7 P0137 0137 EC-SR-180
HO2S2 (B1) *7 P0138 0138 EC-SR-187
HO2S2 (B1) *7 P0139 0139 EC-SR-194
HO2S2 (B1) *7 P0140 0140 EC-SR-201
HO2S2 HTR (B1) *7 P0141 0141 EC-SR-207
STEP MOTOR CIRC -B1 *7 P1777 1777 Refer to AT section.
STEP MOTOR FNC *7 P1778 1778 Refer to AT section.
TCC SOLENOID/CIRC *7 P0740 0740 Refer to AT section.
THRTL POS SEN/CIRC *3 P0120 0120 EC-SR-137
TP SEN/CIRC A/T *7 P1705 1705 Refer to AT section.
TW CATALYST SYSTEM *7 P0420 0420 EC-SR-246
VEH SPD SEN/CIR AT *4 *7 P0720 0720 Refer to AT section.
VEH SPEED SEN/CIRC *4 P0500 0500 EC-SR-255
*1: In Diagnostic Test Mode II (Self-diagnostic results). These numbers are controlled by NISSAN.
*2: These numbers are prescribed by ISO 15031-6.
*3: When the fail-safe operation occurs, the MI illuminates.
*4: The MI illuminates when the ªSecondary speed sensor signalº and the ªVehicle speed sensor signalº meet the fail-safe condition at
the same time.
*5: While engine is running.
*6: 1st trip DTC No. is the same as DTC No.
*7: Not available for ªEastern Europe modelsº.
P NO. INDEX FOR DTCNCEC0001S02
DTC*6
Items
(CONSULT-II screen terms)Reference page
CONSULT-II
GST*2ECM*1
Ð Ð Unable to access ECM EC-SR-93
No DTC Flashing*5 NO SELF DIAGNOSTIC FAILURE INDICATED EC-SR-59
P0000 0000 NO SELF DIAGNOSTIC FAILURE INDICATED Ð
P0100 0100 MAF SEN/CIRCUIT*3 EC-SR-120
P0110 0110 AIR TEMP SEN/CIRC *7 EC-SR-127
P0115 0115 COOLANT T SEN/CIRC *3 EC-SR-132
P0120 0120 THRTL POS SEN/CIRC *3 EC-SR-137
P0130 0130 HO2S1 (B1) EC-SR-144
P0131 0131 HO2S1 (B1) *7 EC-SR-150
P0132 0132 HO2S1 (B1) *7 EC-SR-156
P0133 0133 HO2S1 (B1) *7 EC-SR-162
P0134 0134 HO2S1 (B1) *7 EC-SR-170
P0135 0135 HO2S1 HTR (B1) *7 EC-SR-175
TROUBLE DIAGNOSIS Ð INDEXSR20DE
Alphabetical & P No. Index for DTC (Cont'd)
EC-7

SEF188X ECM
ECM harness
connectorGlove box
View from under the vehicleFront exhaust tube
Coolant temperature
sensor harness connector
Front
Fuel pump
harness connector
Fuel tank
gauge unit
harness connector
Under rear seat cushion
Front exhaust tubeHeated oxygen
sensor 2 (rear)
Heated oxygen sensor 2 (rear)
Harness connector
EVAP canister purge
volume control solenoid
valve
Oil filler capPower steering
oil pressure switch
EVAP canister (LHD models)
ENGINE AND EMISSION CONTROL OVERALL SYSTEMSR20DE
Engine Control Component Parts Location (Cont'd)
EC-17

System ChartNCEC0013
Input (Sensor) ECM Function Output (Actuator)
ICamshaft position sensor
IMass air flow sensor
IEngine coolant temperature sensor
IHeated oxygen sensor 1 (front)
IIgnition switch
IThrottle position sensor
IPNP switch
IAir conditioner switch
IKnock sensor
ICrankshaft position sensor (OBD)*1
IBattery voltage
IPower steering oil pressure switch
IVehicle speed sensor or ABS actuator and
electric unit (control unit)
IIntake air temperature sensor
IHeated oxygen sensor 2 (rear)*2
ITCM (Transmission control module)*3
IClosed throttle position switch
IElectrical load
IRefrigerant pressure sensorFuel injection & mixture ratio control Injectors
Distributor ignition system Power transistor
Idle air control system IACV-AAC valve
Fuel pump control Fuel pump relay
Heated oxygen sensor 1 (front) monitor &
on board diagnostic systemMalfunction indicator
(On the instrument panel)
Heated oxygen sensor1&2(front & rear)
heater controlHeated oxygen sensor1&2
heater (front & rear)
EVAP canister purge flow controlEVAP canister purge volume con-
trol solenoid valve
Cooling fan control Cooling fan relay
Air conditioning cut control Air conditioner relay
*1: These sensors are not used to control the engine system. They are used only for the on board diagnosis.
*2: Under normal conditions, this sensor is not for engine control operation.
*3: The DTC related to CVT will be sent to ECM.
ENGINE AND EMISSION CONTROL OVERALL SYSTEMSR20DE
System Chart
EC-22

Multiport Fuel Injection (MFI) System
DESCRIPTIONNCEC0014Input/Output Signal ChartNCEC0014S01
Sensor Input Signal to ECMECM func-
tionActuator
Camshaft position sensor Engine speed and piston position
Fuel injec-
tion & mix-
ture ratio
controlInjector Mass air flow sensor Amount of intake air
Engine coolant temperature sensor Engine coolant temperature
Heated oxygen sensor 1 (front) Density of oxygen in exhaust gas
Throttle position sensorThrottle position
Throttle valve idle position
PNP switch Gear position
Vehicle speed sensor or ABS actuator and
electric unit (control unit)Vehicle speed
Ignition switch Start signal
Air conditioner switch Air conditioner operation
Knock sensor Engine knocking condition
Electrical load Electrical load signal
Battery Battery voltage
Power steering oil pressure switch Power steering operation
Heated oxygen sensor 2 (rear)* Density of oxygen in exhaust gas
* Under normal conditions, this sensor is not for engine control operation.
Basic Multiport Fuel Injection SystemNCEC0014S02The amount of fuel injected from the fuel injector is determined by the ECM. The ECM controls the length of
time the valve remains open (injection pulse duration). The amount of fuel injected is a program value in the
ECM memory. The program value is preset by engine operating conditions. These conditions are determined
by input signals (for engine speed and intake air) from both the camshaft position sensor and the mass air
flow sensor.
Various Fuel Injection Increase/Decrease CompensationNCEC0014S03In addition, the amount of fuel injected is compensated to improve engine performance under various oper-
ating conditions as listed below.

IDuring warm-up
IWhen starting the engine
IDuring acceleration
IHot-engine operation
IWhen selector lever is changed from ªNº to ªDº (CVT models only)
IHigh-load, high-speed operation

IDuring deceleration
IDuring high engine speed operation
IDuring high vehicle speed operation (M/T models)
IExtremely high engine coolant temperature
ENGINE AND EMISSION BASIC CONTROL
SYSTEM DESCRIPTIONSR20DE
Multiport Fuel Injection (MFI) System
EC-23

Mixture Ratio Feedback Control (Closed loop control)NCEC0014S04
The mixture ratio feedback system provides the best air-fuel mixture ratio for driveability and emission con-
trol. The three way catalyst can then better reduce CO, HC and NOx emissions. This system uses a heated
oxygen sensor 1 (front) in the exhaust manifold to monitor if the engine operation is rich or lean. The ECM
adjusts the injection pulse width according to the sensor voltage signal. For more information about the heated
oxygen sensor 1 (front), refer to EC-SR-144. This maintains the mixture ratio within the range of stoichiomet-
ric (ideal air-fuel mixture).
This stage is referred to as the closed loop control condition.
Heated oxygen sensor 2 (rear) is located downstream of the three way catalyst. Even if the switching char-
acteristics of the heated oxygen sensor 1 (front) shift, the air-fuel ratio is controlled to stoichiometric by the
signal from the heated oxygen sensor 2 (rear).
Open Loop ControlNCEC0014S05The open loop system condition refers to when the ECM detects any of the following conditions. Feedback
control stops in order to maintain stabilized fuel combustion.
IDeceleration and acceleration
IHigh-load, high-speed operation
IMalfunction of heated oxygen sensor 1 (front) or its circuit
IInsufficient activation of heated oxygen sensor 1 (front) at low engine coolant temperature
IHigh engine coolant temperature
IDuring warm-up
IWhen starting the engine
Mixture Ratio Self-learning ControlNCEC0014S06The mixture ratio feedback control system monitors the mixture ratio signal transmitted from the heated oxy-
gen sensor 1 (front). This feedback signal is then sent to the ECM. The ECM controls the basic mixture ratio
as close to the theoretical mixture ratio as possible. However, the basic mixture ratio is not necessarily con-
trolled as originally designed. Both manufacturing differences (i.e., mass air flow sensor hot film) and charac-
teristic changes during operation (i.e., injector clogging) directly affect mixture ratio.
Accordingly, the difference between the basic and theoretical mixture ratios is monitored in this system. This
is then computed in terms of ªinjection pulse durationº to automatically compensate for the difference between
the two ratios.
ªFuel trimº refers to the feedback compensation value compared against the basic injection duration. Fuel trim
includes short term fuel trim and long term fuel trim.
ªShort term fuel trimº is the short-term fuel compensation used to maintain the mixture ratio at its theoretical
value. The signal from the heated oxygen sensor 1 (front) indicates whether the mixture ratio is RICH or LEAN
compared to the theoretical value. The signal then triggers a reduction in fuel volume if the mixture ratio is
rich, and an increase in fuel volume if it is lean.
ªLong term fuel trimº is overall fuel compensation carried out long-term to compensate for continual deviation
of the short term fuel trim from the central value. Such deviation will occur due to individual engine differences,
wear over time and changes in the usage environment.
SEF336WA
ENGINE AND EMISSION BASIC CONTROL
SYSTEM DESCRIPTIONSR20DE
Multiport Fuel Injection (MFI) System (Cont'd)
EC-24

Fuel Injection TimingNCEC0014S07
Two types of systems are used.
Sequential Multiport Fuel Injection System
NCEC0014S0701Fuel is injected into each cylinder during each engine cycle according to the firing order. This system is used
when the engine is running.
Simultaneous Multiport Fuel Injection System
NCEC0014S0702Fuel is injected simultaneously into all four cylinders twice each engine cycle. In other words, pulse signals of
the same width are simultaneously transmitted from the ECM.
The four injectors will then receive the signals two times for each engine cycle.
This system is used when the engine is being started and/or if the fail-safe system (CPU) is operating.
Fuel Shut-offNCEC0014S08Fuel to each cylinder is cut off during deceleration or operation of the engine at excessively high speeds.
Distributor Ignition (DI) System
DESCRIPTIONNCEC0015Input/Output Signal ChartNCEC0015S01
Sensor Input Signal to ECMECM func-
tionActuator
Camshaft position sensor Engine speed and piston position
Ignition tim-
ing controlPower transistor Mass air flow sensor Amount of intake air
Engine coolant temperature sensor Engine coolant temperature
Throttle position sensorThrottle position
Throttle valve idle position
Vehicle speed sensor or ABS actuator and
electric unit (control unit)Vehicle speed
Ignition switch Start signal
Knock sensor Engine knocking
PNP switch Gear position
Battery Battery voltage
SEF337W
ENGINE AND EMISSION BASIC CONTROL
SYSTEM DESCRIPTIONSR20DE
Multiport Fuel Injection (MFI) System (Cont'd)
EC-25