Nissan Almera Tino V10. Instruction — part 503
EC-838
[QG (WITHOUT EURO-OBD)]
HO2S2 HEATER (A/T MODELS)
2.
CHECK HO2S2 POWER SUPPLY CIRCUIT
1.
Turn ignition switch “OFF”.
2.
Disconnect heated oxygen sensor 2 harness connector.
3.
Turn ignition switch “ON”.
4.
Check voltage between HO2S2 terminal 4 and ground with
CONSULT-II or tester.
OK or NG
OK
>> GO TO 4.
NG
>> GO TO 3.
3.
DETECT MALFUNCTIONING PART
Check the following.
●
Harness connectors M71, F45
●
Fuse block (J/B) connector M1
●
10A fuse
●
Harness for open or short between heated oxygen sensor 2 and fuse
>> Repair open circuit or short to ground or short to power in harness or connectors.
4.
CHECK HO2S2 OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1.
Turn ignition switch “OFF”.
2.
Disconnect ECM harness connector.
3.
Check harness continuity between ECM terminal and HO2S2 terminal as follows.
Refer to Wiring Diagram.
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.
MBIB0094E
Voltage:
Battery voltage
PBIB0541E
Terminals
Bank
ECM
Sensor
7
1
1
2
1
2
Continuity should exist.
HO2S2 HEATER (A/T MODELS)
EC-839
[QG (WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
M
A
EC
5.
CHECK HEATED OXYGEN SENSOR 2 HEATER
Refer to
EC-839, "Component Inspection"
.
OK or NG
OK
>> GO TO 7.
NG
>> Replace malfunctioning heated oxygen sensor 2.
6.
CHECK INTERMITTENT INCIDENT
Refer to
EC-644, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"
.
>> INSPECTION END
Component Inspection
EBS00R1Z
HEATED OXYGEN SENSOR 2 HEATER
1.
Check resistance between HO2S2 terminals as follows.
2.
If NG, replace heated oxygen sensor 2.
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 sur-
face such as a concrete floor; use a new one.
●
Before installing new oxygen sensor, clean exhaust system
threads using Oxygen Sensor Thread Cleaner tool J-43897-
18 or J-43897-12 and approved anti-seize lubricant.
Removal and Installation
EBS00R20
HATED OXYGEN SENSOR 2
Refer to
EM-21, "EXHAUST MANIFOLD AND CATALYTIC CONVERTER"
.
Terminal No.
Resistance
2 and 3
5.0 - 7.0
Ω
at 25
°
C (77
°
F)
1 and 2, 3, 4
∞ Ω
(Continuity should not exist)
4 and 1, 2, 3
SEF249Y
EC-840
[QG (WITHOUT EURO-OBD)]
IAT SENSOR
IAT SENSOR
PFP:22630
Component Description
EBS00R21
The intake air temperature sensor is built into mass air flow sensor.
The sensor detects intake air temperature and transmits a signal to
the ECM.
The temperature sensing unit uses a thermistor which is sensitive to
the change in temperature. Electrical resistance of the thermistor
decreases in response to the temperature rise.
<Reference data>
*: These data are reference values and are measured between ECM terminal 34
(Intake air temperature sensor) and body ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output
voltage. Doing so may result in damage to the ECM's transistor.
Use a ground other than ECM terminals, such as the ground.
SEC266C
Intake air
temperature
°
C (
°
F)
Voltage*
V
Resistance
k
Ω
25 (77)
3.32
1.9 - 2.1
80 (176)
1.23
0.31 - 0.37
SEF012P
IAT SENSOR
EC-841
[QG (WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
M
A
EC
Wiring Diagram
EBS00R22
YEC488A
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