Nissan Almera Tino V10. Manual — part 507
EC-854
[QG (WITHOUT EURO-OBD)]
HO2S1 (A/T MODELS)
BANK 2
YEC484A
HO2S1 (A/T MODELS)
EC-855
[QG (WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
M
A
EC
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.
Diagnostic Procedure
EBS00R2F
1.
INSPECTION START
Do you have CONSULT-II?
Yes or No
Yes
>> GO TO 2.
No
>> GO TO 3.
2.
CHECK OVERALL FUNCTION
With CONSULT-II
1.
Start engine and warm it up to normal operating temperature.
2.
Select “HO2S1 MNTR (B1)” and“HO2S1 MNTR (B2)” in “DATA MONITOR” mode with CONSULT-II.
3.
Keep the engine speed at 2,000 rpm under no load, and make
sure that the monitors fluctuate between LEAN and RICH more
than five times in 10 seconds.
OK or NG
OK
>> INSPECTION END
NG
>> GO TO 4.
3.
CHECK OVERALL FUNCTION
Without CONSULT-II
1.
Start engine and warm it up to normal operating temperature.
2.
Set voltmeter probes between ECM terminal 35 [HO2S1(B1) signal] or 36 [HO2S1(B2) signal] and engine
ground.
3.
Keep the engine speed at 2,000 rpm under no load, and make
sure that the voltage fluctuates between 0 to 0.3V and 0.6 to
1.0V more than five times in 10 seconds.
OK or NG
OK
>> INSPECTION END
NG
>> GO TO 4.
TERMI-
NAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
36
W
Heated oxygen sensor 1
(bank 2)
[Engine is running]
●
Warm-up condition
●
Engine speed is 2,000 rpm.
0 - Approximately 1.0V
(Periodically change)
74
B
Sensors' ground
(Heated oxygen sensor)
[Engine is running]
●
Idle speed
Approximately 0V
1 time:
RICH
→
LEAN
→
RICH
2 times:
RICH
→
LEAN
→
RICH
→
LEAN
→
RICH
SEF646Y
1 time:
0 - 0.3V
→
0.6 - 1.0V
→
0 - 0.3V
2 times:
0 - 0.3V
→
0.6 - 1.0V
→
0 - 0.3V
→
0.6 - 1.0V
→
0 - 0.3V
MBIB0019E
EC-856
[QG (WITHOUT EURO-OBD)]
HO2S1 (A/T MODELS)
4.
RETIGHTEN GROUND SCREWS
1.
Turn ignition switch “OFF”.
2.
Loosen and retighten engine ground screws.
>> GO TO 5.
5.
RETIGHTEN HEATED OXYGEN SENSOR 1
Loosen and retighten heated oxygen sensor 1.
>> GO TO 6.
6.
CHECK FOR EXHAUST GAS LEAK
1.
Start engine and run it at idle.
2.
Listen for an exhaust gas leak before three way catalyst (Manifold).
OK or NG
OK
>> GO TO 7.
NG
>> Repair or replace.
7.
CHECK FOR INTAKE AIR LEAK
Listen for an intake air leak after the mass air flow sensor.
OK or NG
OK
>> GO TO 8.
NG
>> Repair or replace.
MBIB0095E
Tightening torque:
40 - 60 N·m (4.1 - 6.2 kg-m, 30 - 44 ft-
lb)
MBIB0099E
SEC502D
HO2S1 (A/T MODELS)
EC-857
[QG (WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
M
A
EC
8.
CHECK HO2S1 GROUND CIRCUIT FOR OPEN AND SHORT
1.
Turn ignition switch “OFF”.
2.
Disconnect HO2S1 harness connector.
3.
Disconnect ECM harness connector.
4.
Check harness continuity between ECM terminal 74 and HO2S1
terminal 3. Refer to Wiring Diagram.
5.
Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 9.
NG
>> Repair open circuit or short to ground or short to power
in harness or connectors.
9.
CHECK HO2S1 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1.
Check harness continuity between ECM terminal and HO2S1 terminal as follows.
Refer to Wiring Diagram.
2.
Check harness continuity between the following terminals and ground.
Refer to Wiring Diagram.
3.
Also check harness for short to power.
OK or NG
OK
>> GO TO 10.
NG
>> Repair open circuit or short to ground or short to power in harness or connectors.
10.
CHECK HEATED OXYGEN SENSOR 1 HEATER
Refer to
EC-827, "Component Inspection"
.
OK or NG
OK
>> GO TO 11.
NG
>> Replace malfunctioning heated oxygen sensor 1.
11.
CHECK MASS AIR FLOW SENSOR
Refer to
EC-659, "Component Inspection"
.
OK or NG
OK
>> GO TO 12.
NG
>> Replace mass air flow sensor.
Continuity should exist.
MBIB0092E
Terminals
Bank
ECM
Sensor
35
2
1
36
2
2
Continuity should exist.
Terminals
Bank
ECM
Sensor
35
2
1
36
2
2
Continuity should not exist.
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