2001 NISSAN ALMERA o2 sensor

System Description/Hatchback With Interior
Room Lamp Timer
=NJEL0435POWER SUPPLY AND GROUNDNJEL0435S01Power is supplied at all times:
+through 15A fuse [No. 5, located in the fuse block (J/B)]
+to time control unit terminal 9,
+through 10A fuse [No. 12, located in the fuse block (J/B)]
+to key switch terminal 1 and
+through 10A fuse [No. 13, located in the fuse block (J/B)]
+to interior room lamp terminal 1.
When the key is removed from ignition key cylinder, power is interrupted:
+through key switch terminal 2
+to time control unit terminal 22.
With the ignition key switch in the ON or START position, power is supplied:
+through 10A fuse [No. 10, located in the fuse block (J/B)]
+to time control unit terminal 1.
Ground is supplied:
+through body grounds terminals M28 and M67
+to time control unit terminal 16
When the driver side door is opened, ground is supplied:
+through body grounds B9, B21 and D96
+to door switch driver side terminal 3
+from door switch driver side terminal 2
+to time control unit terminal 6.
When any door is opened, ground is supplied:
+through case ground of each door switch
+to each door switch terminal 1
+to time control unit terminal 7.
When the driver side door is unlocked, the time control unit receives a ground signal:
+through body grounds terminals M28 and M67
+to door unlock sensor terminal 2
+from door unlock sensor terminal 5
+to time control unit terminal 35.
When a signal, or combination of signals is received by the time control unit, ground is supplied:
+through time control unit terminal 12
+to interior room lamp terminal 2.
With power and ground supplied, the interior room lamp illuminates when interior room lamp switch is in
ªDOORº position.
SWITCH OPERATIONNJEL0435S02When interior room lamp switch is in ªONº position, ground is supplied:
+through case grounds of interior room lamp
+to interior room lamp.
With power and ground supplied, the interior room lamp illuminates.
INTERIOR ROOM LAMP TIMER OPERATIONNJEL0435S03When interior room lamp switch is in the ªDOORº position, the time control unit keeps the interior room lamp
illuminated for about 30 seconds when:
+unlock signal is supplied from driver's door unlock sensor while all doors are closed
+key is removed from ignition key cylinder while all doors are closed
+driver's door is opened and then closed
The timer is canceled when:
INTERIOR ROOM LAMP
System Description/Hatchback With Interior Room Lamp Timer
EL-127

3 CHECK DRIVER SIDE DOOR SWITCH
Check continuity between door switch terminals 2 and 3.
SEL325WA
OK or NG
OK©Check the following.
+Driver side door switch ground circuit and condition
+Harness for open or short between time control unit and driver side door switch
NG©Replace driver side door switch.
4 CHECK FRONT DOOR UNLOCK SENSOR INPUT SIGNAL
Check voltage between time control unit harness connector terminal 35 and ground.
SEL431X
OK or NG
OK©GO TO 6.
NG©GO TO 5.
INTERIOR ROOM LAMP
Trouble Diagnoses/Hatchback With Interior Room Lamp Timer (Cont'd)
EL-132

5 CHECK FRONT DOOR UNLOCK SENSOR
1. Disconnect front door unlock sensor harness connector.
2. Check continuity between door unlock sensor terminals.
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.
6 CHECK DOOR SWITCHES INPUT SIGNAL
Check voltage between time control unit harness connector terminal 7 and ground.
SEL432X
OK or NG
OK©GO TO 8.
NG©GO TO 7.
INTERIOR ROOM LAMP
Trouble Diagnoses/Hatchback With Interior Room Lamp Timer (Cont'd)
EL-133

3 CHECK DRIVER SIDE DOOR SWITCH
Check continuity between terminals 2 and 3.
SEL325WA
OK or NG
OK©Check the following.
+Driver side door switch ground circuit and condition
+Harness for open or short between time control unit and driver side door switch
NG©Replace driver side door switch.
4 CHECK FRONT DOOR UNLOCK SENSOR INPUT SIGNAL
Check voltage between time control unit harness connector terminal 35 and ground.
SEL431X
OK or NG
OK©Replace time control unit.
NG©GO TO 5.
INTERIOR ROOM LAMP
Trouble Diagnoses/Hatchback With Interior Room Lamp Timer (Cont'd)
EL-137

5 CHECK FRONT DOOR UNLOCK SENSOR
1. Disconnect front door unlock sensor harness connector.
2. Check continuity between door unlock sensor terminals.
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.
INTERIOR ROOM LAMP
Trouble Diagnoses/Hatchback With Interior Room Lamp Timer (Cont'd)
EL-138

POWER SUPPLY AND GROUND CIRCUITNJEL0042S08Power is supplied at all times
+through 10A fuse [No. 12, located in the fuse block (J/B)]
+to combination meter terminal 18 (with tachometer) or 21 (without tachometer).
With the ignition switch in the ON or START position, power is supplied
+through 10A fuse [No. 30, located in the fuse block (J/B)]
+to combination meter terminal 17 (with tachometer) or 22 (without tachometer).
Ground is supplied
+through body grounds M28 and M67
+to combination meter terminal 24 (with tachometer) or 23 (without tachometer).
WATER TEMPERATURE GAUGENJEL0042S01The 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 19 (with tachometer) or 34 (without tachometer) of the combination meter for
the water temperature gauge. The needle on the gauge moves from ªCº to ªHº.
TACHOMETERNJEL0042S02The 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 21 for the tachometer.
FUEL GAUGENJEL0042S03The 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 B9, B21 and B308
+through terminal 1 (Gasoline engine models) or 3 (Diesel engine models) of the fuel level sensor unit and
+through terminal 4 (Gasoline engine models) or 1 (Diesel engine models) of the fuel level sensor unit
+to combination meter terminal 20 (with tachometer) or 35 (without tachometer) for the fuel gauge.
SPEEDOMETERNJEL0042S04The combination meter provides a voltage signal to the vehicle speed sensor for the speedometer.
The voltage is supplied
+from combination meter terminal 23 (with tachometer) or 37 (without tachometer) for the speedometer
+to terminal 1 of the vehicle speed sensor.
The speedometer converts the voltage into the vehicle speed displayed.
METERS AND GAUGES
System Description/Sedan (Cont'd)
EL-145

SYMPTOM CHARTNJEL0046S10Symptom Chart 1 (Malfunction is Indicated in
Diagnosis Mode)
NJEL0046S1001
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.
Refer to ªMETER/GAUGE RESISTANCE CHECKº,
EL-162.
2. If the resistance of meter/gauge is OK, replace unified
meter control unit.
Symptom Chart 2 (No Malfunction is Indicated in
Diagnosis Mode)
NJEL0046S1002
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-157.)
INSPECTION/ENGINE REVOLUTION SIGNAL
(Refer to EL-158.)
INSPECTION/FUEL LEVEL SENSOR UNIT (Refer to
EL-159.)
INSPECTION/THERMAL TRANSMITTER (Refer to
EL-161.)
2. Replace unified meter control unit. Multiple meter/gauge are
malfunctioning. (except
odo/trip meter)
Before starting trouble diagnoses below, perform PRELIMINARY
CHECK, EL-154.
METERS AND GAUGES
Trouble Diagnoses/Sedan (Cont'd)
EL-155

INSPECTION/VEHICLE SPEED SENSOR=NJEL0046S03
1 CHECK VEHICLE SPEED SENSOR OUTPUT
1. Remove vehicle speed sensor from transmission.
2. Check voltage between combination meter terminal 23 (with tachometer) or 37 (without tachometer) and ground while
quickly turning speed sensor pinion.
SEL657X
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/Sedan (Cont'd)
EL-157