sensor NISSAN PRIMERA 1999 Electronic Repair Manual

TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
1 Y/RIntake valve timing con-
trol solenoid valve[Engine is running]
IIdle speedBATTERY VOLTAGE
(11 - 14V)
[Engine is running]
ILift up drive wheels and shift gear ªONº
IRev engine up from 1,200 to 3,000 rpmApproximately 0V
3 W/RHeated oxygen sensor
2 heater (rear)[Engine is running]
IEngine speed is below 3,600 rpm
IAfter driving for 2 minutes at a speed of 70
km/h (43 MPH) or moreApproximately 0.7V
[Ignition switch ªONº]
IEngine stopped
IEngine speed is above 3,600 rpmBATTERY VOLTAGE
(11 - 14V)
4LHeated oxygen sensor
1 heater (front)[Engine is running]
IEngine speed is below 3,200 rpmApproximately 0V
[Engine is running]
IEngine speed is above 3,200 rpmBATTERY VOLTAGE
(11 - 14V)
6
7
15
16BR
Y/B
P
ORIACV-AAC valve[Engine is running]
IWarm-up condition
IIdle speed0.1 - 14V
8*
9*
17*
18*W/B
SB
G/R
R/YEGR volume control
valve[Engine is running]
IWarm-up condition
IRev engine up from 2,000 to 4,000 rpm0 - 14V
13 LG/R Cooling fan relay[Engine is running]
ICooling fan is not operatingBATTERY VOLTAGE
(11 - 14V)
[Engine is running]
ICooling fan is operatingApproximately 0V
14 P/BEVAP canister purge
volume control valve
(ON/OFF duty)[Engine is running]
IWarm-up condition
IAccelerator pedal depressed5 - 12V
SEF975W
21 B/P Fuel pump relay[Ignition switch ªONº]
IFor 1 second after turning ignition switch ªONº
[Engine is running]0-1V
[Ignition switch ªONº]
IMore than 1 second after turning ignition switch
ªONºBATTERY VOLTAGE
(11 - 14V)
22 OR/L Malfunction indicator[Ignition switch ªONº]0-1V
[Engine is running]
IIdle speedBATTERY VOLTAGE
(11 - 14V)
23 L/W Air conditioner relay[Engine is running]
IBoth A/C switch and blower switch are ªONºApproximately 0V
[Engine is running]
IA/C switch is ªOFFºBATTERY VOLTAGE
(11 - 14V)
*: If so equipped
TROUBLE DIAGNOSIS Ð GENERAL DESCRIPTIONQG16I18DE
ECM Terminals and Reference Value (Cont'd)
EC-92

TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
44 GY Air conditioner switch[Engine is running]
IBoth air conditioner switch and blower switch
are ªONº (Compressor operates)Approximately 0V
[Engine is running]
IAir conditioner switch is ªOFFºApproximately 5V
46 PU/WPower steering oil pres-
sure switch[Engine is running]
ISteering wheel is fully turnedApproximately 0V
[Engine is running]
ISteering wheel is not turnedApproximately 5V
48 B ECM ground[Engine is running]
IIdle speedEngine ground
50 RElectrical load signal
(Headlamp
Rear defogger)[Engine is running]
IHeadlamp switch or rear defogger switch is
ªONºBATTERY VOLTAGE
(11 - 14V)
[Engine is running]
IHeadlamp switch and rear defogger switch are
ªOFFºApproximately 0V
51 LG/B Blower fan SW[Ignition switch ªONº]
IBlower fan switch is ªONºApproximately 0V
57 B ECM ground[Engine is running]
IIdle speedEngine ground
58 B Sensors' ground[Engine is running]
IWarm-up condition
IIdle speedApproximately 0V
61 B Mass air flow sensor[Engine is running]
IWarm-up condition
IIdle speed1.0 - 1.7V
[Engine is running]
IWarm-up condition
IEngine speed is 2,500 rpm1.5 - 2.1V
62 RHeated oxygen sensor
1 (front)[Engine is running]
IWarm-up condition
IEngine speed is 2,000 rpm0 - Approximately 0.7V
SEF008W
63 LHeated oxygen sensor
2 (rear)[Engine is running]
IAfter warming up to normal operating tempera-
ture and engine speed is 3,000 rpm0 - Approximately 1.0V
64 GIntake air temperature
sensor[Engine is running]Approximately 0 - 4.8V
Output voltage varies with
intake air temperature
TROUBLE DIAGNOSIS Ð GENERAL DESCRIPTIONQG16I18DE
ECM Terminals and Reference Value (Cont'd)
EC-94

TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
66*
75W
WCamshaft position sen-
sor (PHASE)[Engine is running]
IWarm-up condition
IIdle speed2.0 - 3.0V
SEF977W
[Engine is running]
IEngine speed is 2,000 rpm2.0 - 3.0V
SEF978W
67 W/LPower supply for ECM
(Back-up)[Ignition switch ªOFFº]BATTERY VOLTAGE
(11 - 14V)
70 BR/YEngine coolant tem-
perature sensor[Engine is running]Approximately 0 - 4.8V
Output voltage varies with
engine coolant temperature
72* PUEGR temperature sen-
sor[Engine is running]
IWarm-up condition
IIdle speedLess than 4.5V
[Engine is running]
IWarm-up condition
IEGR system is operating0 - 1.0V
73 WMass air flow sensor
ground[Engine is running]
IWarm-up condition
IIdle speedApproximately 0V
74 R/LRefrigerant pressure
sensor[Engine is running]
IAir conditioner switch is ªONº
(Compressor operates)More than 1.5V
[Engine is running]
IAir conditioner switch is turned from ªONº to
ªOFFºVoltage is decreasing gradually
81 W Knock sensor[Engine is running]
IIdle speed1.0 - 4.0V
*: If so equipped
TROUBLE DIAGNOSIS Ð GENERAL DESCRIPTIONQG16I18DE
ECM Terminals and Reference Value (Cont'd)
EC-95

TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
85 WCrankshaft position sen-
sor (POS)[Engine is running]
IWarm-up condition
IIdle speed3.0 - 4.0V
SEF979W
[Engine is running]
IEngine speed is 2,000 rpm3.0 - 4.0V
SEF980W
86 OR/WVehicle speed sensor or
ABS actuator and elec-
tric unit (control unit)[Engine is running]
ILift up the vehicle
IIn 2nd gear position
IVehicle speed is 40 km/h (25 MPH)2.0 - 3.0V
SEF976W
92 Y Throttle position sensor[Engine is running]
IAccelerator pedal released0.35 - 0.65V
[Ignition switch ªONº]
IAccelerator pedal fully depressed3.7 - 4.5V
93 G/R Data link connector[Engine is running]
IIdle speed (CONSULT-II or GST is discon-
nected)Approximately 0V
101
103
105
107R/B
Y/B
G/B
L/BInjector No. 1
Injector No. 2
Injector No. 3
Injector No. 4[Engine is running]
IWarm-up condition
IIdle speedBATTERY VOLTAGE
(11 - 14V)
SEF011W
[Engine is running]
IWarm-up condition
IEngine speed is 2,000 rpmBATTERY VOLTAGE
(11 - 14V)
SEF012W
106
108B/Y ECM ground[Engine is running]
IIdle speedEngine ground
TROUBLE DIAGNOSIS Ð GENERAL DESCRIPTIONQG16I18DE
ECM Terminals and Reference Value (Cont'd)
EC-96

TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
11 0
11 2R
RPower supply for ECM[Ignition switch ªONº]BATTERY VOLTAGE
(11 - 14V)
111 G Sensors' power supply[Ignition switch ªONº]Approximately 5V
114 G/W Adjust switch[Engine is running]
IIdle speed0V
115 BR/W Data link connector[Engine is running]
IIdle speed (CONSULT-II or GST is discon-
nected)0 - 10V
11 6Refer to
EL sec-
tionImmobilizer[Engine is running]
IIdle speed (GST is disconnected)BATTERY VOLTAGE
(11 - 14V)
TROUBLE DIAGNOSIS Ð GENERAL DESCRIPTIONQG16I18DE
ECM Terminals and Reference Value (Cont'd)
EC-97

DescriptionNLEC1748The specification (SP) value indicates the tolerance of the value that is displayed in ªDATA MONITOR (SPEC)º
mode of CONSULT-II during normal operation of the Engine Control System. When the value in ªDATA MONI-
TOR (SPEC)º mode is within the SP value, the Engine Control System is confirmed OK. When the value in
ªDATA MONITOR (SPEC)º mode is NOT within the SP value, the Engine Control System may have one or
more malfunctions.
The SP value is used to detect malfunctions that may affect the Engine Control System, but will not light the
MIL.
The SP value will be displayed for the following three items:
IB/FUEL SCHDL (The fuel injection pulse width programmed into ECM prior to any learned on board cor-
rection)
IA/F ALPHA-B1/B2 (The mean value of air-fuel ratio feedback correction factor per cycle)
IMAS A/F SE-B1 (The signal voltage of the mass air flow sensor)
Testing ConditionNLEC1749IVehicle driven distance: More than 5,000 km (3,107 miles)
IBarometric pressure: 98.3 - 104.3 kPa (0.983 - 1.043 bar, 1.003 - 1.064 kg/cm2, 14.25 - 15.12 psi)
IAtmospheric temperature: 20 - 30ÉC (68 - 86ÉF)
IEngine coolant temperature: 75 - 95ÉC (167 - 203ÉF)
ITransmission: Warmed-up*1
IElectrical load: Not applied*2
IEngine speed: Idle
*1: For after the engine is warmed up to normal operating temperature, drive vehicle until ªFLUID TEMP SEº
(CVT fluid temperature sensor signal) indicates less than 0.9V.
*2: Rear window defogger switch, air conditioner switch, lighting switch are ªOFFº. Cooling fans are not oper-
ating. Steering wheel is straight ahead.
SEF601Z
Inspection ProcedureNLEC1750NOTE:
Perform ªDATA MONITOR (SPEC)º mode in maximum scale dis-
play.
1. Perform ªBasic Inspectionº, EC-QG-72.
2. Confirm that the testing conditions indicated above are met.
3. Select ªB/FUEL SCHDLº, ªA/F ALPHA-B1º and ªMAS A/F
SE-B1º in ªDATA MONITOR (SPEC)º mode with CONSULT-II.
4. Make sure that monitor items are within the SP value.
5. If NG, go to ªDiagnostic Procedureº, EC-QG-99.
TROUBLE DIAGNOSIS Ð SPECIFICATION VALUEQG16I18DE
Description
EC-98

Component DescriptionNCEC0050The mass air flow sensor is placed in the stream of intake air. It
measures the intake flow rate by measuring a part of the entire
intake flow. It consists of a hot wire that is supplied with electric
current from the ECM. The temperature of the hot wire is controlled
by the ECM a certain amount. The heat generated by the hot wire
is reduced as the intake air flows around it. The more air, the
greater the heat loss.
Therefore, the ECM must supply more electric current to maintain
the temperature of the hot wire as air flow increases. The ECM
detects the air flow by means of this current change.
CONSULT-II Reference Value in Data Monitor
Mode
NCEC0051Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION
MAS A/F SE-B1IEngine: After warming up
IAir conditioner switch: ªOFFº
IShift lever: ªNº
INo-loadIdle 1.0 - 1.7V
2,500 rpm 1.5 - 2.1V
CAL/LD VALUEIEngine: After warming up
IAir conditioner switch: ªOFFº
IShift lever: ªNº
INo-loadIdle Not used
2,500 rpm Not used
MASS AIRFLOWIEngine: After warming up
IAir conditioner switch: ªOFFº
IShift lever: ªNº
INo-loadIdle 1.0 - 4.0 g×m/s
2,500 rpm 5.0 - 10.0 g×m/s
ECM Terminals and Reference ValueNCEC0052Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.
TERMINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
61 B Mass air flow sensor[Engine is running]
IWarm-up condition
IIdle speed1.0 - 1.7V
[Engine is running]
IWarm-up condition
IEngine speed is 2,500 rpm1.5 - 2.1V
73 WMass air flow sensor
ground[Engine is running]
IWarm-up condition
IIdle speedApproximately 0V
On Board Diagnosis LogicNCEC0053
DTC No. Malfunction is detected when ... Check Items (Possible Cause)
P0100*
0100A) An excessively high voltage from the sensor is sent
to ECM when engine is not running.IHarness or connectors
(The sensor circuit is open or shorted.)
IMass air flow sensor
B) An excessively low voltage from the sensor is sent
to ECM when engine is running.IHarness or connectors
(The sensor circuit is open or shorted.)
IIntake air leaks
IMass air flow sensor
*: When this malfunction is detected, the ECM enters fail-safe mode and the MI lights up.
SEF987W
DTC P0100 MASS AIR FLOW SENSOR (MAFS)QG16I18DE
Component Description
EC-110

Detected items Engine operating condition in fail-safe mode
Mass air flow sensor circuit Engine speed will not rise more than 2,400 rpm due to the fuel cut.
DTC Confirmation ProcedureNCEC0054CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If ªDTC Confirmation Procedureº has been previously conducted,
always turn ignition switch ªOFFº and wait at least 9 seconds
before conducting the next test.
PROCEDURE FOR MALFUNCTION ANCEC0054S01With CONSULT-II
1) Turn ignition switch ªONº.
2) Select ªDATA MONITORº mode with CONSULT-II.
3) Wait at least 2 seconds.
4) If 1st trip DTC is detected, go to ªDiagnostic Procedureº, EC-
QG-113.
With GST
Follow the procedure ªWith CONSULT-IIº above.
PROCEDURE FOR MALFUNCTION BNCEC0054S02With CONSULT-II
1) Turn ignition switch ªONº.
2) Select ªDATA MONITORº mode with CONSULT-II.
3) Start engine and wait 2 seconds at most.
4) If 1st trip DTC is detected, go to ªDiagnostic Procedureº, EC-
QG-113.
With GST
Follow the procedure ªWith CONSULT-IIº above.
NEF068A
NEF068A
DTC P0100 MASS AIR FLOW SENSOR (MAFS)QG16I18DE
DTC Confirmation Procedure
EC-111

Wiring DiagramNCEC0056
YEC063A
DTC P0100 MASS AIR FLOW SENSOR (MAFS)QG16I18DE
Wiring Diagram
EC-112

Diagnostic ProcedureNCEC0057
1 INSPECTION START
Which malfunction (A, or B) is duplicated?
Malfunction A or B
A©GO TO 3.
B©GO TO 2.
2 CHECK INTAKE SYSTEM
Check the following for connection.
IAir duct
IVacuum hoses
IIntake air passage between air duct to collector
OK or NG
OK©GO TO 3.
NG©Reconnect the parts.
3 RETIGHTEN GROUND SCREWS
1. Turn ignition switch ªOFFº.
2. Loosen and retighten engine ground screws.
SEF994W
©GO TO 4.
DTC P0100 MASS AIR FLOW SENSOR (MAFS)QG16I18DE
Diagnostic Procedure
EC-113