2001 NISSAN ALMERA o2 sensor

INSPECTION/FUEL LEVEL SENSOR UNIT=NJEL0046S08
1 CHECK GROUND CIRCUIT FOR FUEL LEVEL SENSOR UNIT
Check harness continuity between fuel level sensor unit connector terminal 1 (Gasoline engine models) or 3 (Diesel
engine models) and ground.
SEL963W
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-162).
OK or NG
OK©GO TO 3.
NG©Replace fuel level sensor unit.
METERS AND GAUGES
Trouble Diagnoses/Sedan (Cont'd)
EL-159

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 20 (with tachometer) or 35 (without tachometer) or and fuel level
sensor unit connector terminal 4 (Gasoline engine) or 1 (Diesel engine).
Continuity should exist.
3. Check continuity between combination meter terminal 20 (with tachometer) or 35 (without tachometer) or and ground.
Continuity should not exist.
SEL659X
OK or NG
OK©Fuel level sensor unit is OK.
NG©Repair harness or connector.
METERS AND GAUGES
Trouble Diagnoses/Sedan (Cont'd)
EL-160

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