Nissan Almera Tino V10 (2001 year). Manual — part 54
3
DETECT MALFUNCTIONING PART
Check the following.
+
Harness connectors F38, M50 (where fitted)
+
Harness connectors M72, F44 (where fitted)
+
10A fuse
+
Harness for open or short between heated oxygen sensor 1 (front) and fuse
©
Repair harness or connectors.
4
CHECK OUTPUT SIGNAL CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Check harness continuity between heated oxygen sensor 1 (front) harness connector terminal 3 and ECM terminal 4.
Refer to wiring diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK
©
GO TO 5.
NG
©
Repair open circuit or short to ground or short to power in harness or connectors.
5
CHECK HEATED OXYGEN SENSOR 1 HEATER (FRONT)
Refer to “Component Inspection”, EC-425.
OK or NG
OK
©
GO TO 6.
NG
©
Replace heated oxygen sensor 1 (front).
6
CHECK INTERMITTENT INCIDENT
Perform “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-145.
©
INSPECTION END
SEF935X
Component Inspection
NLEC1230
HEATED OXYGEN SENSOR 1 HEATER (FRONT)
NLEC1230S01
Check resistance between terminals 3 and 1.
Resistance: 2.3 - 4.3
Ω
at 25°C (77°F)
Check continuity between terminals 2 and 1, 3 and 2.
Continuity should not exist.
If NG, replace the heated oxygen sensor 1 (front).
CAUTION:
+
Discard any heated oxygen sensor which has been
dropped from a height of more than 0.5 m (19.7 in) onto a
hard surface such as a concrete floor; use a new one.
+
Before installing new oxygen sensor, clean exhaust sys-
tem threads using Oxygen Sensor Thread Cleaner tool
and approved anti-seize lubricant.
HEATED OXYGEN SENSOR 1 HEATER (FRONT)
QG18DE
Diagnostic Procedure (Cont’d)
EC-425
SEF327R
Component Description
NLEC1231
The heated oxygen sensor 2 (rear), after three way catalyst, moni-
tors the oxygen level in the exhaust gas.
Even if switching characteristics of the heated oxygen sensor 1
(front) are shifted, the air fuel ratio is controlled to stoichiometric,
by the signal from the heated oxygen sensor 2 (rear).
This sensor is made of ceramic zirconia. The zirconia generates
voltage from approximately 1V in richer conditions to 0V in leaner
conditions.
Under normal conditions the heated oxygen sensor 2 (rear) is not
used for engine control operation.
CONSULT-II Reference Value in Data Monitor
Mode
NLEC1232
Specification data are reference values.
MONITOR ITEM
CONDITION
SPECIFICATION
HO2S2 (B1)
+
Engine: After warming up
Revving engine from idle to 3,000
rpm
0 - 0.3V
←→
Approx. 0.6 - 1.0V
HO2S2 MNTR
(B1)
LEAN
←→
RICH
ECM Terminals and Reference Value
NLEC1233
Specification 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.
TERMI-
NAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
63
L
Heated oxygen sensor 2
(rear)
[Engine is running]
+
After warming up to normal operating tempera-
ture and engine speed is 3,000 rpm
0 - Approximately 1.0V
HEATED OXYGEN SENSOR 2 (REAR)
QG18DE
Component Description
EC-426
Wiring Diagram
NLEC1237
MODELS WITH ECM IN ENGINE COMPARTMENT
NLEC1237S03
YEC746
HEATED OXYGEN SENSOR 2 (REAR)
QG18DE
Wiring Diagram
EC-427
MODELS WITH ECM IN CABIN
NLEC1237S04
YEC895
HEATED OXYGEN SENSOR 2 (REAR)
QG18DE
Wiring Diagram (Cont’d)
EC-428
Diagnostic Procedure
NLEC1238
1
CHECK OVERALL FUNCTION-I
1. Start engine and drive the vehicle at over 70 km/h (43 MPH) for 2 consecutive minutes.
2. Stop vehicle and keep the engine running.
3. Set voltmeter probes between ECM terminals 63 [HO2S2 (B1) signal] and ground.
4. Check the voltage while revving up to 4,000 rpm under no load at least 10 times.
(Depress and release the accelerator pedal as quickly as possible.)
SEF240Z
OK or NG
OK
©
INSPECTION END
NG
©
GO TO 2.
2
CHECK OVERALL FUNCTION-II
Keep engine at idle for 10 minutes, then check the voltage between ECM terminal 63 and ground, or check the voltage
when coasting at 80 km/h (50 MPH) in 3rd gear.
SEF240Z
OK or NG
OK
©
INSPECTION END
NG
©
GO TO 3.
HEATED OXYGEN SENSOR 2 (REAR)
QG18DE
Diagnostic Procedure
EC-429
3
RETIGHTEN GROUND SCREWS
1. Turn ignition switch “OFF”.
2. Loosen and retighten engine ground screws.
JEF104Y
©
GO TO 4.
4
CHECK INPUT SIGNAL CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect heated oxygen sensor 2 (rear) harness connector and ECM harness connector.
SEF639Z
3. Check harness continuity between ECM terminal 63 and heated oxygen sensor 2 (rear) harness connector terminal 1.
Refer to wiring diagram.
Continuity should exist.
4. Check harness continuity between ECM terminal 63 [or heated oxygen sensor 2 (rear) harness connector terminal 1]
and ground.
Continuity should not exist.
5. Also check harness for short to ground and short to power.
OK or NG
OK
©
GO TO 6.
NG
©
GO TO 5.
5
DETECT MALFUNCTIONING PART
Check the harness for open or short between heated oxygen sensor 2 (rear) and ECM.
©
Repair open circuit or short to ground or short to power in harness or connectors.
HEATED OXYGEN SENSOR 2 (REAR)
QG18DE
Diagnostic Procedure (Cont’d)
EC-430
6
CHECK GROUND CIRCUIT
1. Check harness continuity between heated oxygen sensor 2 (rear) harness connector terminal 4 and body ground.
Refer to wiring diagram.
Continuity should exist.
2. Also check harness for short to power.
OK or NG
OK
©
GO TO 7.
NG
©
Repair open circuit or short to power in harness or connectors.
7
CHECK HEATED OXYGEN SENSOR 2 (REAR)
Refer to “Component Inspection”, EC-431.
OK or NG
OK
©
GO TO 8.
NG
©
Replace heated oxygen sensor 2 (rear).
8
CHECK INTERMITTENT INCIDENT
Perform “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-145.
©
INSPECTION END
SEF662Y
Component Inspection
NLEC1239
HEATED OXYGEN SENSOR 2 (REAR)
NLEC1239S01
With CONSULT-II
1)
Start engine and drive vehicle at a speed of more than 70 km/h
(43 MPH) for 2 consecutive minutes.
2)
Stop vehicle with engine running.
3)
Select “FUEL INJECTION” in “ACTIVE TEST” mode, and
select “HO2S2 (B1)” as the monitor item with CONSULT-II.
4)
Check “HO2S2 (B1)” at idle speed when adjusting “FUEL
INJECTION” to
±
25%.
“HO2S2 (B1)” should be above 0.68V at least once when
the “FUEL INJECTION” is +25%. “HO2S2 (B1)” should be
below 0.56V at least once when the “FUEL INJECTION” is
−25%.
CAUTION:
+
Discard any heated oxygen sensor which has been
dropped from a height of more than 0.5 m (19.7 in) onto a
hard surface such as a concrete floor; use a new one.
+
Before installing new oxygen sensor, clean exhaust sys-
tem threads using Oxygen Sensor Thread Cleaner tool
and approved anti-seize lubricant.
SEF244YA
HEATED OXYGEN SENSOR 2 (REAR)
QG18DE
Diagnostic Procedure (Cont’d)
EC-431
SEF032X
Without CONSULT-II
1)
Start engine and drive vehicle at a speed of more than 70 km/h
(43 MPH) for 2 consecutive minutes.
2)
Stop vehicle with engine running.
3)
Set voltmeter probes between ECM terminals 63 (HO2S2 sig-
nal) and engine ground.
4)
Check the voltage when revving up to 4,000 rpm under no load
at least 10 times.
(Depress and release accelerator pedal as soon as possible.)
The voltage should be above 0.68V at least once.
If the voltage is above 0.68V at step 4, step 5 is not nec-
essary.
5)
Check the voltage when revving up to 6,000 rpm under no
load. Or keep vehicle at idling for 10 minutes, then check the
voltage. Or check the voltage when coasting from 80 km/h (50
MPH) in 3rd gear position.
The voltage should be below 0.56V at least once.
CAUTION:
+
Discard any heated oxygen sensor which has been
dropped from a height of more than 0.5 m (19.7 in) onto a
hard surface such as a concrete floor; use a new one.
+
Before installing new oxygen sensor, clean exhaust sys-
tem threads using Oxygen Sensor Thread Cleaner tool
and approved anti-seize lubricant.
HEATED OXYGEN SENSOR 2 (REAR)
QG18DE
Component Inspection (Cont’d)
EC-432
Description
NLEC1240
SYSTEM DESCRIPTION
NLEC1240S01
Sensor
Input Signal to ECM
ECM func-
tion
Actuator
Camshaft position sensor (PHASE)
Crankshaft position sensor (POS)
Engine speed
Heated
oxygen
sensor 2
heater
(rear) con-
trol
Heated oxygen sensor 2 heater
(rear)
The ECM performs ON/OFF control of the heated oxygen sensor 2 heater (rear) corresponding to the engine
speed.
OPERATION
NLEC1240S02
Engine condition
Heated oxygen sensor 2 heater (rear)
Engine stopped
OFF
Engine is running.
Engine speed below 3,600 rpm [After
driving for 2 minutes at a speed of 70
km/h (43 MPH) or more]
ON
Engine speed above 3,600 rpm
OFF
CONSULT-II Reference Value in Data Monitor
Mode
NLEC1241
Specification data are reference values.
MONITOR ITEM
CONDITION
SPECIFICATION
HO2S2 HTR (B1)
+
Engine speed
Below 3,600 rpm [After driving for 2 minutes at a
speed of 70 km/h (43 MPH) or more]
ON
Above 3,600 rpm
OFF
+
Ignition switch ON (Engine stopped)
OFF
ECM Terminals and Reference Value
NLEC1242
Specification 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.
TERMI-
NAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
3
W/R
Heated oxygen sensor 2
heater (rear)
[Engine is running]
+
Engine speed is below 3,600 rpm [After driving
for 2 minutes at a speed of 70 km/h (43 MPH) or
more]
0 - 1V
[Engine is running]
+
Engine speed is above 3,600 rpm
BATTERY VOLTAGE
(11 - 14V)
[Ignition switch “ON”]
+
Engine stopped
HEATED OXYGEN SENSOR 2 HEATER (REAR)
QG18DE
Description
EC-433
Wiring Diagram
NLEC1245
MODELS WITH ECM IN ENGINE COMPARTMENT
NLEC1245S03
YEC747
HEATED OXYGEN SENSOR 2 HEATER (REAR)
QG18DE
Wiring Diagram
EC-434
MODELS WITH ECM IN CABIN
NLEC1245S04
YEC896
HEATED OXYGEN SENSOR 2 HEATER (REAR)
QG18DE
Wiring Diagram (Cont’d)
EC-435
Diagnostic Procedure
NLEC1246
1
CHECK OVERALL FUNCTION
Without CONSULT-II
1. Start engine and drive the vehicle at over 70 km/h (43 MPH) for 2 consecutive minutes.
2. Stop vehicle and keep the engine running.
3. Set the voltmeter probe between ECM terminals 3 [HO2S2 HTR (B1) signal] and ground.
4. Check the voltage under the following conditions.
SEF241Z
OK or NG
OK
©
INSPECTION END
NG
©
GO TO 2.
2
CHECK POWER SUPPLY
1. Turn ignition switch “OFF”.
2. Disconnect heated oxygen sensor 2 (rear) harness connector.
SEF639Z
3. Turn ignition switch “ON”.
4. Check voltage between terminal 2 and ground.
SEF218W
Voltage: Battery voltage
OK or NG
OK
©
GO TO 4.
NG
©
GO TO 3.
HEATED OXYGEN SENSOR 2 HEATER (REAR)
QG18DE
Diagnostic Procedure
EC-436
3
DETECT MALFUNCTIONING PART
Check the following.
+
Harness connectors F38, M50 (where fitted)
+
Harness connectors M72, F44 (where fitted)
+
Harness for open or short between heated oxygen sensor 2 (rear) and fuse
+
10A fuse
©
Repair harness or connectors.
4
CHECK OUTPUT SIGNAL CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Check harness continuity between heated oxygen sensor 2 (rear) harness connector terminal 3 and ECM terminal 3.
Refer to wiring diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK
©
GO TO 6.
NG
©
GO TO 5.
5
DETECT MALFUNCTIONING PART
Check the harness for open or short between heated oxygen sensor 2 heater (rear) and ECM.
©
Repair open circuit or short to ground or short to power in harness or connectors.
6
CHECK HEATED OXYGEN SENSOR 2 HEATER (REAR)
Refer to “Component Inspection”, EC-438.
OK or NG
OK
©
GO TO 7.
NG
©
Replace heated oxygen sensor 2 (rear).
7
CHECK INTERMITTENT INCIDENT
Perform “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-145.
©
INSPECTION END
HEATED OXYGEN SENSOR 2 HEATER (REAR)
QG18DE
Diagnostic Procedure (Cont’d)
EC-437
SEF221W
Component Inspection
NLEC1247
HEATED OXYGEN SENSOR 2 HEATER (REAR)
NLEC1247S01
Check the following.
1.
Check resistance between terminals 2 and 3.
Resistance: 2.3 - 4.3
Ω
at 25°C (77°F)
2.
Check continuity.
Terminal No.
Continuity
1 and 2, 3, 4
No
4 and 1, 2, 3
If NG, replace the heated oxygen sensor 2 (rear).
CAUTION:
+
Discard any heated oxygen sensor which has been
dropped from a height of more than 0.5 m (19.7 in) onto a
hard surface such as a concrete floor; use a new one.
+
Before installing new oxygen sensor, clean exhaust sys-
tem threads using Oxygen Sensor Thread Cleaner tool
and approved anti-seize lubricant.
HEATED OXYGEN SENSOR 2 HEATER (REAR)
QG18DE
Component Inspection
EC-438
SEF058X
JEF835Z
Component Description
NLEC1281
The crankshaft position sensor (POS) is located on the right-rear
wall of the cylinder block in relation to the signal plate at the rear
end of the crankshaft.
The sensor consists of a permanent magnet, and hall IC.
When the engine is running, the high and low parts of the teeth
cause the gap with the sensor to change.
The changing gap causes the magnetic field near the sensor to
change.
Due to the changing magnetic field, the voltage from the sensor
changes.
The ECM receives the voltage signal and detects the fluctuation of
the engine revolution.
ECM Terminals and Reference Value
NLEC1282
Specification 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.
TERMI-
NAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (AC Voltage)
85
R
Crankshaft position
sensor (POS)
[Engine is running]
+
Warm-up condition
+
Idle speed
3 - 4V
SEF979W
[Engine is running]
+
Engine speed is 2,000 rpm
3 - 4V
SEF980W
CRANKSHAFT POSITION SENSOR (POS)
QG18DE
Component Description
EC-439
Wiring Diagram
NLEC1285
MODELS WITH ECM IN ENGINE COMPARTMENT
NLEC1285S01
YEC750
CRANKSHAFT POSITION SENSOR (POS)
QG18DE
Wiring Diagram
EC-440
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