1999 NISSAN PRIMERA power steering

Component Inspection ............................................. 311
DTC P1706 PARK/NEUTRAL POSITION (PNP)
SWITCH.......................................................................313
Component Description ...........................................313
CONSULT-II Reference Value in Data Monitor
Mode ........................................................................313
ECM Terminals and Reference Value .....................313
On Board Diagnosis Logic.......................................313
DTC Confirmation Procedure ..................................313
Overall Function Check ...........................................314
Wiring Diagram ........................................................315
Diagnostic Procedure For M/T Models....................316
INJECTOR...................................................................318
Component Description ...........................................318
CONSULT-II Reference Value in Data Monitor
Mode ........................................................................318
ECM Terminals and Reference Value .....................318
Wiring Diagram ........................................................319
Diagnostic Procedure ..............................................320
Component Inspection .............................................322
IGNITION SIGNAL.......................................................323
Component Description ...........................................323
CONSULT-II Reference Value in Data Monitor
Mode ........................................................................323
ECM Terminals and Reference Value .....................323
Wiring Diagram ........................................................324
Diagnostic Procedure ..............................................326
Component Inspection .............................................331
START SIGNAL...........................................................332
CONSULT-II Reference Value in Data Monitor
Mode ........................................................................332
ECM Terminals and Reference Value .....................332
Wiring Diagram ........................................................333
Diagnostic Procedure ..............................................334
FUEL PUMP.................................................................336
System Description ..................................................336
Component Description ...........................................336
CONSULT-II Reference Value in Data Monitor
Mode ........................................................................336
ECM Terminals and Reference Value .....................337
Wiring Diagram ........................................................338
Diagnostic Procedure ..............................................339Component Inspection .............................................341
POWER STEERING OIL PRESSURE SWITCH.........342
Component Description ...........................................342
CONSULT-II Reference Value in Data Monitor
Mode ........................................................................342
ECM Terminals and Reference Value .....................342
Wiring Diagram ........................................................343
Diagnostic Procedure ..............................................344
Component Inspection .............................................346
REFRIGERANT PRESSURE SENSOR......................347
Description ...............................................................347
ECM Terminals and Reference Value .....................347
Wiring Diagram ........................................................348
Diagnostic Procedure ..............................................349
ELECTRICAL LOAD SIGNAL.....................................351
CONSULT-II Reference Value in Data Monitor
Mode ........................................................................351
ECM Terminals and Reference Value .....................351
Wiring Diagram ........................................................352
MI & DATA LINK CONNECTORS...............................354
Wiring Diagram ........................................................354
SERVICE DATA AND SPECIFICATIONS (SDS)........355
Fuel Pressure Regulator..........................................355
Idle Speed and Ignition Timing ................................355
Mass Air Flow Sensor..............................................355
Intake Air Temperature Sensor ................................355
Engine Coolant Temperature Sensor ......................355
Throttle Position Sensor ..........................................355
Heated Oxygen Sensor 1 Heater (Front) ................355
Heated Oxygen Sensor 2 Heater (Rear).................355
Crankshaft Position Sensor (POS) ..........................356
Camshaft Position Sensor (PHASE) .......................356
EGR Volume Control Valve (If so equipped)...........356
EGR Temperature Sensor (If so equipped).............356
EVAP Canister Purge Volume Control Valve ..........356
IACV-AAC Valve ......................................................356
Injector .....................................................................356
Ignition Coil with Power Transistor ..........................357
Fuel Pump ...............................................................357
CONTENTS(Cont'd)
EC-5

Vacuum Hose DrawingNCEC0012Refer to ªSystem Diagramº on EC-QG-18 for vacuum control system.
NEF231A Fuel pressure
regulator
EVAP canister purge
pipe (to EVAP
canister)
To air duct To air control valve
(Power steering)
EVAP canister purge volume
control solenoid valve
EVAP canister
Air
Fuel tank
ENGINE AND EMISSION CONTROL OVERALL SYSTEMQG16I18DE
Vacuum Hose Drawing
EC-19

System ChartNCEC0013
Input (Sensor) ECM Function Output (Actuator)
ICamshaft position sensor (PHASE)
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
IEGR temperature sensor*1*3
ICrankshaft position sensor (POS)
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
IElectrical load
IRefrigerant pressure sensorFuel injection & mixture ratio control Injectors
Electronic ignition system Power transistor
Idle air control system IACV-AAC valve
Valve timing controlIntake valve timing control sole-
noid valve
Fuel pump control Fuel pump relay
Heated oxygen sensor 1 monitor & on
board diagnostic systemMalfunction indicator
(On the instrument panel)
EGR control*3 EGR volume control valve*3
Heated oxygen sensor 1, 2 heater control Heated oxygen sensor heater
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: This sensor is 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: If so equipped
ENGINE AND EMISSION CONTROL OVERALL SYSTEMQG16I18DE
System Chart
EC-20

Multiport Fuel Injection (MFI) System
DESCRIPTIONNCEC0014Input/Output Signal ChartNCEC0014S01
Sensor Input Signal to ECMECM func-
tionActuator
Crankshaft position sensor (POS) Engine speed and piston position
Fuel injec-
tion & mix-
ture ratio
controlInjector Camshaft position sensor (PHASE) Cylinder number
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
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 DESCRIPTIONQG16I18DE
Multiport Fuel Injection (MFI) System
EC-21

System DescriptionNCEC0015S02
The ignition timing is controlled by the ECM to maintain the best air-fuel ratio for every running condition of
the engine. The ignition timing data is stored in the ECM. This data forms the map shown above.
The ECM receives information such as the injection pulse width, crankshaft position sensor signal and cam-
shaft position sensor signal. Computing this information, ignition signals are transmitted to the power transis-
tor.
e.g., N: 1,800 rpm, Tp: 1.50 msec
AÉBTDC
During the following conditions, the ignition timing is revised by the ECM according to the other data stored
in the ECM.
IAt starting
IDuring warm-up
IAt idle
IDuring 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 Control
DESCRIPTIONNCEC0016Input/Output Signal ChartNCEC0016S01
Sensor Input Signal to ECMECM func-
tionActuator
Air conditioner switch Air conditioner ªONº signal
Air condi-
tioner cut
controlAir conditioner relay Throttle position sensor Throttle valve opening angle
Crankshaft position sensor (POS) Engine speed
Engine coolant temperature sensor Engine coolant temperature
Ignition switch Start signal
Refrigerant pressure sensor Refrigerant pressure
Vehicle speed sensor or ABS actuator and
electric unit (control unit)Vehicle speed
Power steering oil pressure switch Power steering operation
System DescriptionNCEC0016S02This system improves engine operation when the air conditioner is used.
Under the following conditions, the air conditioner is turned off.
IWhen the accelerator pedal is fully depressed.
IWhen cranking the engine.
IAt high engine speeds.
IWhen the engine coolant temperature becomes excessively high.
IWhen operating power steering during low engine speed or low vehicle speed.
IWhen engine speed is excessively low.
SEF742M
ENGINE AND EMISSION BASIC CONTROL
SYSTEM DESCRIPTIONQG16I18DE
Electronic Ignition (EI) System (Cont'd)
EC-24

ENGINE CONTROL COMPONENT PARTS/CONTROL
SYSTEMS APPLICATION
NCEC0034S02
ItemDIAGNOSTIC TEST MODE
WORK
SUP-
PORTSELF-DIAGNOSTIC
RESULTS
D ATA
MONITORD ATA
MONI-
TOR
(SPEC)ACTIVE
TESTDTC & SRT
CONFIRMATION
DTC*1FREEZE
FRAME
DATA*2SRT
STA-
TUSSRT
WORK
SUP-
PORTDTC
WORK
SUP-
PORT
ENGINE CONTROL COMPONENT PARTS
INPUTCamshaft position
(PHASE) sensorXX X X
Mass air flow sensor X X X
Engine coolant tempera-
ture sensorXX X XX
Heated oxygen sensor 1
(Front)X X X XXX
Heated oxygen sensor 2
(rear)X X X XXX
Vehicle speed sensor or
ABS actuator and electric
unit (control unit)XX X X
Throttle position sensor X X X
EGR temperature sensor
(If so equipped)XXX
Intake air temperature
sensorXXX
Crankshaft position sen-
sor (POS)XX X X
Knock sensor X
Ignition switch (start sig-
nal)XX
Closed throttle position
switch (throttle position
sensor signal)XX
Air conditioner switch X X
Refrigerant pressure sen-
sorXX
Park/Neutral position
(PNP) switchXXX
Power steering oil pres-
sure switchXX
Electrical load X X
Battery voltage X X
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTIONQG16I18DE
CONSULT-II (Cont'd)
EC-56

Monitored item [Unit]ECM
input
signalsMain
signalsDescription Remarks
AIR COND SIG
[ON/OFF]qqIIndicates [ON/OFF] condition of the air condi-
tioner switch as determined by the air condition-
ing signal.
P/N POSI SW
[ON/OFF]qqIIndicates [ON/OFF] condition from the PNP
switch signal.
PW/ST SIGNAL
[ON/OFF]qqIIndicates [ON/OFF] condition of the power steer-
ing oil pressure switch determined by the power
steering oil pressure switch signal.
LOAD SIGNAL
[ON/OFF]qqIIndicates [ON/OFF] condition from the electrical
load signal and/or lighting switch.
ON ... rear defogger is operating and/or lighting
switch is on.
OFF ... rear defogger is not operating and light-
ing switch is not on.
IGNITION SW
[ON/OFF]qIIndicates [ON/OFF] condition from ignition
switch.
HEATER FAN SW
[ON/OFF]qIIndicates [ON/OFF] condition from the heater
fan switch.
INJ PULSE-B1
[msec]qIIndicates the actual fuel injection pulse width
compensated by ECM according to the input
signals.IWhen the engine is stopped, a
certain computed value is indi-
cated.
B/FUEL SCHDL
[msec]IªBase fuel scheduleº indicates the fuel injection
pulse width programmed into ECM, prior to any
learned on board correction.
IGN TIMING [BTDC]qIIndicates the ignition timing computed by ECM
according to the input signals.
IACV-AAC/V [step]qIIndicates the IACV-AAC valve control value
computed by ECM according to the input sig-
nals.
A/F ALPHA-B1 [%]qIIndicates the mean value of the air-fuel ratio
feedback correction factor per cycle.IWhen the engine is stopped, a
certain value is indicated.
IThis data also includes the data
for the air-fuel ratio learning
control.
AIR COND RLY
[ON/OFF]qIIndicates the air conditioner relay control condi-
tion determined by ECM according to the input
signals.
FUEL PUMP RLY
[ON/OFF]qIIndicates the fuel pump relay control condition
determined by ECM according to the input sig-
nals.
INT/V SOL-B1
[ON/OFF]IThe control condition of the valve timing sole-
noid valve (determined by ECM according to the
input signal) is indicated.
ON ... Intake valve timing control operating
OFF ... Intake valve timing control not operating
COOLING FAN
[ON/OFF]qIIndicates the control condition of the cooling fan
determined by ECM according to the input sig-
nals.
HI ... High speed operation
LOW ... Low speed operation
OFF ... Stop
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTIONQG16I18DE
CONSULT-II (Cont'd)
EC-60

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
Crankshaft position sensor (POS) circuit 2 2 EC-QG-232
Camshaft position sensor (PHASE) circuit 3 2 3 EC-QG-238
Mass air flow sensor circuit11222 22 2EC-QG-110
Heated oxygen sensor 1 (front) circuit1232 22 2EC-QG-132
Engine coolant temperature sensor circuit112323223 2EC-QG-120
Throttle position sensor circuit 1 222222 2EC-QG-125
Incorrect throttle position sensor adjust-
ment31 11111 1EC-QG-72
Vehicle speed sensor circuit or ABS
actuator and electric unit (control unit) cir-
cuit2 3 3 3 EC-QG-267
Knock sensor circuit 2 3 EC-QG-228
ECM 22333333333EC-QG-282,
81
Start signal circuit 2 EC-QG-332
PNP switch circuit 3 3 3 3 3 EC-QG-313
Power steering oil pressure switch circuit 2 3 3 EC-QG-342
Electrical load signal circuit 3 3 EC-QG-351
1 - 6: The numbers refer to the order of inspection.
(continued on next page)
TROUBLE DIAGNOSIS Ð GENERAL DESCRIPTIONQG16I18DE
Symptom Matrix Chart (Cont'd)
EC-83