Nissan Cube. Manual — part 330
EC-206
< DTC/CIRCUIT DIAGNOSIS >
[MR18DE]
P0139 HO2S2
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Proceed to
Component Function Check
INFOID:0000000009947328
1.
PERFORM COMPONENT FUNCTION CHECK-I
Without CONSULT
1.
Start engine and warm it up to normal operating temperature.
2.
Turn ignition switch OFF and wait at least 10 seconds.
3.
Start engine and keep the engine speed between 3,500 and 4,000 rpm for at least 1 minute under no load.
4.
Let engine idle for 1 minute.
5.
Check the voltage between ECM harness connector and ground under the following condition.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> GO TO 2.
2.
PERFORM COMPONENT FUNCTION CHECK-II
Check the voltage between ECM harness connector and ground under the following condition.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> GO TO 3.
3.
PERFORM COMPONENT FUNCTION CHECK-III
Check the voltage between ECM harness connector and ground under the following condition.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Go to
Diagnosis Procedure
INFOID:0000000009947329
1.
CHECK GROUND CONNECTION
1.
Turn ignition switch OFF.
2.
Check ground connection E38. Refer to
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair or replace ground connection.
ECM
Ground
Condition
Voltage
Connector
Terminal
F8
50
(HO2S2 signal)
Ground
Revving up to 4,000 rpm under no
load at least 10 times
The voltage should be above 0.8 V
at least once during this procedure.
ECM
Ground
Condition
Voltage
Connector
Terminal
F8
50
(HO2S2 signal)
Ground
Keeping engine speed at idle for 10
minutes
The voltage should be above 0.8 V
at least once during this procedure.
ECM
Ground
Condition
Voltage
Connector
Terminal
F8
50
(HO2S2 signal)
Ground
Coasting from 80 km/h (50 MPH) in
D position (CVT), 4th gear position
(M/T)
The voltage should be above 0.8 V
at least once during this procedure.
P0139 HO2S2
EC-207
< DTC/CIRCUIT DIAGNOSIS >
[MR18DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
2.
CLEAR THE MIXTURE RATIO SELF-LEARNING VALUE
1.
Clear the mixture ratio self-learning value. Refer to
EC-22, "MIXTURE RATIO SELF-LEARNING VALUE
CLEAR : Special Repair Requirement"
.
2.
Run engine for at least 10 minutes at idle speed.
Is the 1st trip DTC P0171 or P0172 detected? Is it difficult to start engine?
YES
>> Perform trouble diagnosis for DTC P0171 or P0172. Refer to
.
NO
>> GO TO 3.
3.
CHECK HO2S2 GROUND CIRCUIT FOR OPEN AND SHORT
1.
Turn ignition switch OFF.
2.
Disconnect heated oxygen sensor 2 harness connector.
3.
Disconnect ECM harness connector.
4.
Check the continuity between HO2S2 harness connector and ECM harness connector.
5.
Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair open circuit or short to ground or short to power in harness or connectors.
4.
CHECK HO2S2 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1.
Check the continuity between HO2S2 harness connector and ECM harness connector.
2.
Check the continuity between HO2S2 harness connector and ground, or ECM harness connector and
ground.
3.
Also check harness for short to power.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Repair open circuit or short to ground or short to power in harness or connectors.
5.
CHECK HEATED OXYGEN SENSOR 2
EC-208, "Component Inspection"
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> GO TO 6.
6.
REPLACE HEATED OXYGEN SENSOR 2
Replace heated oxygen sensor 2. Refer to
.
HO2S2
ECM
Continuity
Connector
Terminal
Connector
Terminal
F30
1
F8
59
Existed
HO2S2
ECM
Continuity
Connector
Terminal
Connector
Terminal
F30
4
F8
50
Existed
HO2S2
Ground
Continuity
Connector
Terminal
F30
4
Ground
Not existed
ECM
Ground
Continuity
Connector
Terminal
F8
50
Ground
Not existed
EC-208
< DTC/CIRCUIT DIAGNOSIS >
[MR18DE]
P0139 HO2S2
CAUTION:
• Discard any 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 sensor, clean exhaust system threads using Oxygen Sensor Thread Cleaner
[commercial service tool (J-43897-18 or J43897-12)] and approved Anti-seize Lubricant (commercial
service tool).
>> INSPECTION END
7.
CHECK INTERMITTENT INCIDENT
GI-40, "Intermittent Incident"
>> INSPECTION END
Component Inspection
INFOID:0000000009947330
1.
INSPECTION START
Do you have CONSULT?
Do you have CONSULT?
YES
>> GO TO 2.
NO
>> GO TO 3.
2.
CHECK HEATED OXYGEN SENSOR 2
With CONSULT
1.
Turn ignition switch ON and select “DATA MONITOR” mode with CONSULT.
2.
Start engine and warm it up to normal operating temperature.
3.
Turn ignition switch OFF and wait at least 10 seconds.
4.
Start engine and keep the engine speed between 3,500 and 4,000 rpm for at least 1 minute under no load.
5.
Let engine idle for 1 minute.
6.
Select “FUEL INJECTION” in “ACTIVE TEST” mode, and select “HO2S2 (B1)” as the monitor item with
CONSULT.
7.
Check “HO2S2 (B1)” at idle speed when adjusting “FUEL INJECTION” to
±
25%.
“HO2S2 (B1)” should be above 0.68 V at least once when the “FUEL INJECTION” is + 25%.
“HO2S2 (B1)” should be below 0.18 V at least once when the “FUEL INJECTION” is
−
25%.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> GO TO 6.
3.
CHECK HEATED OXYGEN SENSOR 2-I
Without CONSULT
1.
Start engine and warm it up to normal operating temperature.
2.
Turn ignition switch OFF and wait at least 10 seconds.
3.
Start engine and keep the engine speed between 3,500 and 4,000 rpm for at least 1 minute under no load.
4.
Let engine idle for 1 minute.
5.
Check the voltage between ECM harness connector and ground under the following condition.
PBIB3458E
P0139 HO2S2
EC-209
< DTC/CIRCUIT DIAGNOSIS >
[MR18DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> GO TO 4.
4.
CHECK HEATED OXYGEN SENSOR 2-II
Check the voltage between ECM harness connector and ground under the following condition.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> GO TO 5.
5.
CHECK HEATED OXYGEN SENSOR 2-III
Check the voltage between ECM harness connector and ground under the following condition.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> GO TO 6.
6.
REPLACE HEATED OXYGEN SENSOR 2
Replace heated oxygen sensor 2. Refer to
.
CAUTION:
• Discard any 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 sensor, clean exhaust system threads using Oxygen Sensor Thread Cleaner
[commercial service tool (J-43897-18 or J43897-12)] and approved Anti-seize Lubricant (commercial
service tool).
>> INSPECTION END
ECM
Ground
Condition
Voltage
Connector
Terminal
F8
50
(HO2S2 signal)
Ground
Revving up to 4,000 rpm under no
load at least 10 times
The voltage should be above 0.68 V
at least once during this procedure.
The voltage should be below 0.18 V
at least once during this procedure.
ECM
Ground
Condition
Voltage
Connector
Terminal
F8
50
(HO2S2 signal)
Ground
Keeping engine speed at idle for 10
minutes
The voltage should be above 0.68 V
at least once during this procedure.
The voltage should be below 0.18 V
at least once during this procedure.
ECM
Ground
Condition
Voltage
Connector
Terminal
F8
50
(HO2S2 signal)
Ground
Coasting from 80 km/h (50 MPH) in
D position (CVT), 4th gear position
(M/T)
The voltage should be above 0.68 V
at least once during this procedure.
The voltage should be below 0.18 V
at least once during this procedure.
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