o2 sensor NISSAN ALMERA 2001 Service Manual

Electrical Components Inspection/Sedan=NJEL0047METER/GAUGE RESISTANCE CHECKNJEL0047S04Check resistance between installation screws of meter/gauge after
removing meter/gauge.
Screws
Resistance
W
Tacho/Speedometer Fuel/Temp. gauge
A - C A - C Approx. 190 - Approx. 260
B - D B - C Approx. 230 - Approx. 310
SEL933W
SEL962W
FUEL LEVEL SENSOR UNIT CHECKNJEL0047S01+For removal, refer to FE-6, FE-23, ªFUEL SYSTEMº.
Gasoline Engine ModelsNJEL0047S0103Check the resistance between terminals 4 and 1.
Ohmmeter
Float position mm (in)Resistance
valueW
(+) (þ)
41*1 Full 38 (1.50) Approx.5-6
*2 1/2 89 (3.50) 32 - 33
*3 Empty 162 (6.38) 80 - 83
*1 and *3: When float rod is in contact with stopper.
Diesel EngineNJEL0047S0104Check the resistance between terminals 1 and 3.
Ohmmeter
Float position mm (in)Resistance
valueW
(+) (þ)
13*1 Full 38 (1.50) Approx.5-6
*2 1/2 90 (3.50) 32 - 33
*3 Empty 162 (6.38) 80 - 83
*1 and *3: When float rod is in contact with stopper.
METERS AND GAUGES
Electrical Components Inspection/Sedan
EL-162

MEL424F
THERMAL TRANSMITTER CHECKNJEL0047S02Check the resistance between the terminals of thermal transmitter
and body ground.
Water temperature Resistance
60ÉC (140ÉF) Approx. 170 - 210W
100ÉC (212ÉF) Approx. 47 - 53W
CEL219AA
VEHICLE SPEED SENSOR SIGNAL CHECKNJEL0047S031. Remove vehicle speed sensor from transmission.
2. Turn vehicle speed sensor pinion quickly and measure voltage
across 1 and 2.
METERS AND GAUGES
Electrical Components Inspection/Sedan (Cont'd)
EL-163

WATER TEMPERATURE GAUGENJEL0442S04The water temperature gauge indicates the engine coolant temperature. The reading on the gauge is based
on the resistance of the thermal transmitter.
As the temperature of the coolant increases, the resistance of the thermal transmitter decreases. A variable
ground is supplied to terminal 32 (*1) or 20 (*2) of the combination meter for the water temperature gauge.
The needle on the gauge moves from ªCº to ªHº.
TACHOMETERNJEL0442S05The tachometer indicates engine speed in revolutions per minute (rpm).
The tachometer is regulated by a signal
+from terminal 32 (Gasoline engine models) or 439 (Diesel engine models) of the ECM
+to combination meter terminal 30 (*1) or 22 (*2) for the tachometer.
FUEL GAUGENJEL0442S06The fuel gauge indicates the approximate fuel level in the fuel tank.
The fuel gauge is regulated by a variable ground signal supplied
+from body grounds M28 and M67
+through terminals 26 and 27 (*1) or 9 and 10 (*2) of combination meter,
+through terminal 1 of the fuel level sensor unit and
+through terminal 4 of the fuel level sensor unit
+to combination meter terminal 31 (*1) or 24 (*2) for the fuel gauge.
SPEEDOMETERNJEL0442S07The combination meter provides a voltage signal to the vehicle speed sensor for the speedometer.
The voltage is supplied
+from combination meter terminal 29 (*1) or 5 (*2) for the speedometer
+to terminal 1 of the vehicle speed sensor.
Ground is supplied
+from body grounds M28 and M67
+through terminals 25 and 27 (*1) or 10 and 11 (*2) of combination meter
+to teminal 2 of the vehicle speed sensor.
The speedometer converts the voltage into the vehicle speed displayed.
*1: Models before VIN No. Ð N16U0135126
*2: Models after VIN No. Ð N16U0135126
METERS AND GAUGES
System Description/Hatchback (Cont'd)
EL-165

SYMPTOM CHARTNJEL0448S02Symptom Chart 1 (Malfunction is Indicated in
Diagnosis Mode)
NJEL0448S0201
Symptom Possible causes Repair order
Odo/trip meter indicates
malfunction in Diagnosis
mode.Unified meter control unit Replace unified meter control unit.
Multiple meter/gauge indi-
cate malfunction in Diagno-
sis mode.
One of speedometer/
tachometer/fuel gauge/
water temp. gauge indi-
cates malfunction in Diag-
nosis mode.1. Meter/Gauge
2. Unified meter control unit1. Check resistance of meter/gauge indicating malfunc-
tion. If the resistance is NG, replace the meter/
gauge.
2. If the resistance of meter/gauge is OK, replace uni-
fied meter control unit.
Symptom Chart 2 (No Malfunction is Indicated in
Diagnosis Mode)
NJEL0448S0202
Symptom Possible causes Repair order
One of speedometer/
tachometer/fuel gauge/
water temp. gauge is mal-
functioning.1. Sensor signal
- Vehicle speed signal
- Engine revolution signal
- Fuel gauge
- Water temp. gauge
2. Unified meter control unit1. Check the sensor for malfunctioning meter/gauge.
INSPECTION/VEHICLE SPEED SENSOR (Refer to
EL-179.)
INSPECTION/ENGINE REVOLUTION SIGNAL
(Refer to EL-180.)
INSPECTION/FUEL LEVEL SENSOR UNIT (Refer to
EL-181.)
INSPECTION/THERMAL TRANSMITTER (Refer to
EL-182.)
2. Replace unified meter control unit. Multiple meter/gauge are
malfunctioning. (except
odo/trip meter)
Before starting trouble diagnoses below, perform PRELIMINARY
CHECK, EL-176.
METERS AND GAUGES
Trouble Diagnoses/Hatchback (Cont'd)
EL-177

INSPECTION/VEHICLE SPEED SENSOR=NJEL0448S04
1 CHECK VEHICLE SPEED SENSOR OUTPUT
1. Remove vehicle speed sensor from transmission.
2. Check voltage between combination meter terminal 29 (M152), 5 (M171) and ground while quickly turning speed sen-
sor pinion.
YEL779C
OK or NG
OK©Vehicle speed sensor is OK.
NG©GO TO 2.
2 CHECK VEHICLE SPEED SENSOR
Check resistance between vehicle speed sensor terminals 1 and 2.
SEL645WA
OK or NG
OK©Check the following.
+Harness between combination meter and vehicle speed sensor
+Vehicle speed sensor ground circuit
NG©Replace vehicle speed sensor.
METERS AND GAUGES
Trouble Diagnoses/Hatchback (Cont'd)
EL-179

INSPECTION/FUEL LEVEL SENSOR UNIT=NJEL0448S06
1 CHECK GROUND CIRCUIT FOR FUEL LEVEL SENSOR UNIT
Check harness continuity between fuel level sensor unit connector terminal 1 and ground.
SEL400X
OK or NG
OK©GO TO 2.
NG©Repair harness or connector.
2 CHECK FUEL LEVEL SENSOR UNIT
Refer to ªFUEL LEVEL SENSOR UNIT CHECKº (EL-183).
OK or NG
OK©GO TO 3.
NG©Replace fuel level sensor unit.
3 CHECK HARNESS FOR OPEN OR SHORT
1. Disconnect combination meter connector and fuel level sensor unit connector.
2. Check continuity between combination meter terminal 31 (M152), 24 (M171) and fuel level sensor unit connector termi-
nal 4.
Continuity should exist.
3. Check continuity between combination meter terminal 31 (M152), 24 (M171) and ground.
Continuity should not exist.
YEL781C
OK or NG
OK©Fuel level sensor unit is OK.
NG©Repair harness or connector.
METERS AND GAUGES
Trouble Diagnoses/Hatchback (Cont'd)
EL-181

SEL498X
Electrical Components Inspection/Hatchback=NJEL0449FUEL LEVEL SENSOR UNIT CHECKNJEL0449S02+For removal, refer to FE-6, FE-23, ªFUEL SYSTEMº.
Check the resistance between terminals 4 and 1.
Ohmmeter
Float position mm (in)Resistance
valueW
(+) (þ)
41*1 Full 142.5 (5.61) Approx.4-6
*2 1/2 88.7 (3.492) 32 - 33
*3 Empty 11.1 (0.437) 80 - 83
*1 and *3: When float rod is in contact with stopper.
MEL424F
THERMAL TRANSMITTER CHECKNJEL0449S03Check the resistance between the terminals of thermal transmitter
and body ground.
Water temperature Resistance
65ÉC (149ÉF) Approx. 1,179 - 1,417W
91ÉC (196ÉF) Approx. 474 - 568W
CEL219AA
VEHICLE SPEED SENSOR SIGNAL CHECKNJEL0449S041. Remove vehicle speed sensor from transmission.
2. Turn vehicle speed sensor pinion quickly and measure voltage
across 1 and 2.
METERS AND GAUGES
Electrical Components Inspection/Hatchback
EL-183

SEL977W
Electrical Components InspectionNJEL0051FUEL WARNING LAMP OPERATION CHECKNJEL0051S011. Turn ignition switch ªOFFº.
2. Disconnect fuel level sensor unit harness connector B29
(Sedan with Gasoline engine or Hatchback) or B30 (Sedan
with Diesel engine).
3. Connect a resistor (80W) between fuel level sensor unit har-
ness connector terminals 4 and 1 (Sedan with Gasoline engine
or Hatchback) or 1 and 3 (Sedan with Diesel engine).
4. Turn ignition switch ªONº.
The fuel warning lamp should come on.
NOTE:
For QG Engine Only
ECM might store the DTC P0180 during this inspection. If the DTC
is stored in ECM memory, erase the DTC after reconnecting the
fuel level sensor unit and fuel pump harness connector. Refer to
EC-70, ªHOW TO ERASE EMISSION-RELATED DIAGNOSTIC
INFORMATIONº, ªEmission-related Diagnostic Informationº, ªON
BOARD DIAGNOSTIC SYSTEM DESCRIPTIONº.
MEL425F
OIL PRESSURE SWITCH CHECKNJEL0051S02
Oil pressure
kPa (bar, kg/cm2, psi)Continuity
Engine runningMore than 10 - 20
(0.10 - 0.20, 0.1 - 0.2,
1-3)No
Engine not runningLess than 10 - 20
(0.10 - 0.20, 0.1 - 0.2,
1-3)Ye s
Check the continuity between the terminals of oil pressure switch
and body ground.
SEL901F
DIODE CHECKNJEL0051S03+Check continuity using an ohmmeter.
+Diode is functioning properly if test results are as shown in the
figure at left.
+Check diodes at the combination meter harness connector
instead of on the combination meter assembly. Refer to
EL-185, ªWARNING LAMPº wiring diagrams.
NOTE:
Specification may vary depending on the type of tester. Before
performing this inspection, be sure to refer to the instruction
manual for the tester to be used.
WARNING LAMPS
Electrical Components Inspection
EL-194

Trouble Diagnoses/SedanNJEL0374SYMPTOM CHARTNJEL0374S01
REFERENCE PAGE (EL- ) 200 201 202 203 204
SYMPTOM
POWER SUPPLY AND
GROUND CIRCUIT CHECK
DIAGNOSTIC PROCEDURE 1
(LIGHTING SWITCH INPUT
SIGNAL CHECK)
DIAGNOSTIC PROCEDURE 2
(KEY SWITCH INSERT
SIGNAL CHECK)
DIAGNOSTIC PROCEDURE 3
(DOOR UNLOCK SENSOR CHECK)
DIAGNOSTIC PROCEDURE 4
Light warning chime does not acti-
vate.XX X
Ignition key warning chime does not
activate.XXXX
All warning chimes do not activate. XX
POWER SUPPLY AND GROUND CIRCUIT CHECKNJEL0374S02Power Supply Circuit CheckNJEL0374S0201
SEL991W
Ground Circuit CheckNJEL0374S0202
SEL992W
WARNING CHIME
Trouble Diagnoses/Sedan
EL-200

DIAGNOSTIC PROCEDURE 3 (DOOR UNLOCK SENSOR
CHECK)
NJEL0374S08
1 CHECK DOOR UNLOCK SENSOR INPUT SIGNAL
Check voltage between time control unit terminal 28 and ground.
SEL987W
OK or NG
OK©Door unlock sensor is OK.
NG©GO TO 2.
2 CHECK DOOR UNLOCK SENSOR
1. Disconnect door unlock sensor connector.
2. Check continuity between door unlock sensor terminals 2 and 5.
SEL988W
OK or NG
OK©Check the following.
+Door unlock sensor ground circuit
+Harness for open or short between time control unit and door unlock sensor
NG©Replace door unlock sensor.
WARNING CHIME
Trouble Diagnoses/Sedan (Cont'd)
EL-203