Nissan X-Trail 32. Manual — part 774
P0137 HO2S2
EC-225
< DTC/CIRCUIT DIAGNOSIS >
[MR20DD]
C
D
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EC
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P
O
Always drive vehicle at a safe speed.
Is the inspection result normal?
YES-1 >> To check malfunction symptom before repair: Refer to
GI-44, "Intermittent Incident"
YES-2 >> Confirmation after repair: INSPECTION END
NO
>> Proceed to
.
Diagnosis Procedure
INFOID:0000000010775147
1.
CLEAR THE MIXTURE RATIO SELF-LEARNING VALUE
1.
Start engine and warm it up to the normal operating temperature.
2.
Clear the mixture ratio self-learning value. Refer to
.
3.
Run engine for at least 10 minutes at idle speed.
Is the 1st trip DTC P0171 detected? Is it difficult to start engine?
YES
>> Perform trouble diagnosis for DTC P0171. Refer to
NO
>> GO TO 2.
2.
CHECK HEATED OXYGEN SENSOR 2 GROUND CIRCUIT FOR OPEN AND SHORT
1.
Turn ignition switch OFF.
2.
Disconnect ECM harness connector.
3.
Disconnect heated oxygen sensor 2 (HO2S2) 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 3.
NO
>> Repair or replace malfunctioning part.
3.
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.
ECM
Condition
Voltage
Connector
+
–
Terminal
F8
57
59
Coasting from 80 km/h (50 MPH) with selector
lever in the D position.
The voltage should be above 0.77 V at
least once during this procedure.
The voltage should be below 0.18 V at
least once during this procedure.
+
−
Continuity
HO2S2
ECM
Connector
Terminal
Connector
Terminal
CVT models
F44
1
F8
59
Existed
M/T models
F125
+
−
Continuity
HO2S2
ECM
Connector
Terminal
Connector
Terminal
CVT models
F44
2
F8
57
Existed
M/T models
F125
EC-226
< DTC/CIRCUIT DIAGNOSIS >
[MR20DD]
P0137 HO2S2
3.
Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair or replace malfunctioning part.
4.
CHECK HEATED OXYGEN SENSOR 2
EC-226, "Component Inspection"
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> GO TO 5.
5.
REPLACE HEATED OXYGEN SENSOR 2
Replace malfunctioning heated oxygen sensor 2. Refer to
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 system threads.
>> INSPECTION END
Component Inspection
INFOID:0000000010775148
1.
INSPECTION START
Will CONSULT be used?
Will CONSULT be used?
YES
>> GO TO 2.
NO
>> GO TO 3.
2.
CHECK HEATED OXYGEN SENSOR 2-1
WITH CONSULT
1.
Select “DATA MONITOR” mode with CONSULT.
2.
Start engine and warm it up to the normal operating temperature.
3.
Turn ignition switch OFF and wait at least 10 seconds.
4.
Restart 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)/(B2)” should be above 0.68 V at least once when the “FUEL INJECTION” is +25%.
“HO2S2 (B1)/(B2)” should be below 0.18 V at least once when the “FUEL INJECTION” is +25%.
Is the inspection result normal?
YES
>> INSPECTION END
+
Ground
Continuity
HO2S2
Connector
Terminal
CVT models
F44
2
Ground
Not existed
M/T models
F125
+
Ground
Continuity
ECM
Connector
Terminal
F8
57
Ground
Not existed
P0137 HO2S2
EC-227
< DTC/CIRCUIT DIAGNOSIS >
[MR20DD]
C
D
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EC
N
P
O
NO
>> GO TO 6.
3.
CHECK HEATED OXYGEN SENSOR 2-2
WITHOUT CONSULT
1.
Start engine and warm it up to the normal operating temperature.
2.
Turn ignition switch OFF and wait at least 10 seconds.
3.
Restart 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 terminals under the following conditions.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> GO TO 4.
4.
CHECK HEATED OXYGEN SENSOR 2-3
WITHOUT CONSULT
Check the voltage between ECM harness connector terminals under the following conditions.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> GO TO 5.
5.
CHECK HEATED OXYGEN SENSOR 2-4
WITHOUT CONSULT
Check the voltage between ECM harness connector terminals under the following conditions.
CAUTION:
Always drive vehicle at a safe speed.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> GO TO 6.
6.
REPLACE HEATED OXYGEN SENSOR 2
ECM
Condition
Voltage
Connector
+
–
Terminal
F8
57
59
Revving up to 4,000 rpm quickly under no load
at least 10 times. (Depress and release the ac-
celerator pedal as quickly as possible.)
The voltage should be above 0.77 V at
least once during this procedure.
The voltage should be below 0.18 V at
least once during this procedure.
ECM
Condition
Voltage
Connector
+
–
Terminal
F8
57
59
Keeping engine at idle for 10 minutes.
The voltage should be above 0.77 V at
least once during this procedure.
The voltage should be below 0.18 V at
least once during this procedure.
ECM
Condition
Voltage
Connector
+
–
Terminal
F8
57
59
Coasting from 80 km/h (50 MPH) with selector
lever in the D position.
The voltage should be above 0.77 V at
least once during this procedure.
The voltage should be below 0.18 V at
least once during this procedure.
EC-228
< DTC/CIRCUIT DIAGNOSIS >
[MR20DD]
P0137 HO2S2
Replace malfunctioning heated oxygen sensor 2. Refer to
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 system threads.
>> INSPECTION END
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