Nissan Almera Tino V10. Instruction — part 504
EC-842
[QG (WITHOUT EURO-OBD)]
IAT SENSOR
Diagnostic Procedure
EBS00R23
1.
CHECK OVERALL FUNCTION
1.
Turn ignition switch “ON”.
2.
Check voltage between ECM terminal 34 and ground with CON-
SULT-II or tester.
OK or NG
OK
>> INSPECTION END.
NG
>> GO TO 2.
2.
CHECK INTAKE AIR TEMPERATURE SENSOR POWER SUPPLY CIRCUIT
1.
Turn ignition switch “OFF”.
2.
Disconnect mass air flow sensor (intake air temperature sensor
is built-into) harness connector.
3.
Turn ignition switch “ON”.
4.
Check voltage between mass air flow sensor terminal 5 and
ground.
OK or NG
OK
>> GO TO 3.
NG
>> Repair open circuit or short to ground or short to power
in harness or connectors.
3.
CHECK INTAKE AIR TEMPERATURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1.
Turn ignition switch “OFF”.
2.
Disconnect ECM harness connector.
3.
Check harness continuity between ECM terminal 67 and mass air flow sensor terminal 3.
Refer to Wiring Diagram.
4.
Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 4.
NG
>> Repair open circuit or short to ground or short to power in harness or connectors.
Voltage: Approximately 0 - 4.8V
MBIB0041E
MBIB0096E
Voltage: Approximately 5V
PBIB0066E
Continuity should exist.
IAT SENSOR
EC-843
[QG (WITHOUT EURO-OBD)]
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EC
4.
CHECK INTAKE AIR TEMPERATURE SENSOR
Refer to
EC-843, "Component Inspection"
.
OK or NG
OK
>> GO TO 5.
NG
>> Replace mass air flow sensor (with intake air temperature sensor).
5.
CHECK INTERMITTENT INCIDENT
Refer to
EC-644, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"
.
>> INSPECTION END
Component Inspection
EBS00R24
INTAKE AIR TEMPERATURE SENSOR
1.
Check resistance between intake air temperature sensor termi-
nals 3 and 5 under the following conditions.
2.
If NG, replace mass air flow sensor (with intake air temperature
sensor).
Removal and Installation
EBS00R25
MASS AIR FLOW SENSOR
Refer to
EM-16, "AIR CLEANER AND AIR DUCT"
.
Intake air temperature
°
C (
°
F)
Resistance k
Ω
25 (77)
1.9 - 2.1
SEC266C
SEF012P
EC-844
[QG (WITHOUT EURO-OBD)]
HO2S1 (M/T MODELS)
HO2S1 (M/T MODELS)
PFP:22690
Component Description
EBS00R26
The heated oxygen sensor 1 is placed into the exhaust manifold. It
detects the amount of oxygen in the exhaust gas compared to the
outside air. The heated oxygen sensor 1 has a closed-end tube
made of ceramic zirconia. The zirconia generates voltage from
approximately 1V in richer conditions to 0V in leaner conditions. The
heated oxygen sensor 1 signal is sent to the ECM. The ECM adjusts
the injection pulse duration to achieve the ideal air-fuel ratio. The
ideal air-fuel ratio occurs near the radical change from 1V to 0V.
CONSULT-II Reference Value in Data Monitor Mode
EBS00R27
Specification data are reference values.
SEF463R
SEF288D
MONITOR ITEM
CONDITION
SPECIFICATION
HO2S1 (B1)
●
Engine: After warming up
Maintaining engine speed at 2,000 rpm
0 - 0.3V
←→
Approx. 0.6 - 1.0V
HO2S1 MNTR (B1)
LEAN
←→
RICH
Changes more than 5 times dur-
ing 10 seconds.
HO2S1 (M/T MODELS)
EC-845
[QG (WITHOUT EURO-OBD)]
C
D
E
F
G
H
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K
L
M
A
EC
Wiring Diagram
EBS00R28
YEC482A
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