Nissan March K13. Manual — part 257
HO2S1
EC-489
< DTC/CIRCUIT DIAGNOSIS >
[HR12DE (TYPE 2)]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
2.
Listen for an exhaust gas leak before three way catalyst (manifold).
Is exhaust gas leak detected?
YES
>> Repair or replace.
NO
>> GO TO 4.
4.
CHECK FOR INTAKE AIR LEAK
Listen for an intake air leak after the manifold absolute pressure (MAP) sensor.
Is intake air leak detected?
YES
>> Repair or replace.
NO
>> GO TO 5.
5.
CHECK HO2S1 GROUND CIRCUIT FOR OPEN AND SHORT
1.
Turn ignition switch OFF.
2.
Disconnect heated oxygen sensor 1 harness connector.
3.
Disconnect ECM harness connector.
4.
Check harness continuity between HO2S1 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 6.
NO
>> Repair open circuit or short to ground or short to power in harness or connectors.
6.
CHECK HEATED OXYGEN SENSOR 1 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1.
Check the continuity between HO2S1 harness connector and ECM harness connector.
2.
Check the continuity between HO2S1 harness connector or ECM harness connector and ground.
3.
Also check harness for short to power.
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> Repair open circuit or short to ground or short to power in harness or connectors.
7.
CHECK MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR
Check manifold absolute pressure (MAP) sensor.
Refer to
EC-402, "Component Inspection"
SEC502D
HO2S1
ECM
Continuity
Connector
Terminal
Connector
Terminal
F46
1
F8
56
existed
HO2S1
ECM
Continuity
Connector
Terminal
Connector
Terminal
F46
4
F8
49
Existed
HO2S1
ECM
Ground
Continuity
Connector
Terminal
Connector
Terminal
F46
4
F8
49
Ground
Not existed
EC-490
< DTC/CIRCUIT DIAGNOSIS >
[HR12DE (TYPE 2)]
HO2S1
Is the inspection result normal?
YES
>> GO TO 8.
NO
>> Replace manifold absolute pressure (MAP) sensor.
8.
CHECK PCV VALVE
Refer to
XX-XX, "*****"
.
Is the inspection result normal?
YES
>> GO TO 9.
NO
>> Repair or replace PCV valve.
9.
CHECK HEATED OXYGEN SENSOR 1
Perform
EC-490, "Component Inspection"
Is the inspection result normal?
YES
>> GO TO 10.
NO
>> Replace heated oxygen sensor 1.
10.
CHECK INTERMITTENT INCIDENT
Refer to
XX-XX, "*****"
.
>> INSPECTION END
Component Inspection
INFOID:0000000005886635
1.
INSPECTION START
Do you have CONSULT-III?
Do you have CONSULT-III?
YES
>> GO TO 2.
NO
>> GO TO 3.
2.
CHECK HEATED OXYGEN SENSOR 1
With CONSULT-III
1.
Start engine and warm it up to normal operating temperature.
2.
Set “POST TRIGGER” to 100% in “DATA MONITOR” mode with CONSULT-III.
3.
Select “HO2S1 (B1)” and “HO2S1 MNTR (B1)”.
4.
Hold engine speed at 2,000 rpm under no load during the following steps.
5.
Touch “RECORD” on CONSULT-III screen.
6.
Check the following.
-
“HO2S1 MNTR (B1)” in “DATA MONITOR” mode changes from
“RICH” to “LEAN” to “RICH” more than 5 times in 10 seconds.
5 times (cycles) are counted as shown in the figure.
-
“HO2S1 (B1)” voltage goes above 0.6 V at least once.
-
“HO2S1 (B1)” voltage goes below 0.3 V at least once.
-
“HO2S1 (B1)” voltage never exceeds 1.0 V.
SEF217YA
JMBIA0352ZZ
HO2S1
EC-491
< DTC/CIRCUIT DIAGNOSIS >
[HR12DE (TYPE 2)]
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.
3.
CHECK HEATED OXYGEN SENSOR 1
Without CONSULT-III
1.
Start engine and warm it up to normal operating temperature.
2.
Check the voltage between ECM harness connector and ground under the following condition.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> GO TO 4.
4.
REPLACE HEATED OXYGEN SENSOR 1
Replace heated oxygen sensor 1.
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 heated oxygen sensor, clean exhaust system threads using Oxygen Sensor
Thread Cleaner (commercial service tool) and approved Anti-seize Lubricant (commercial service
tool).
>> INSPECTION END
ECM
Condition
Voltage
Connector
Terminal
+
−
F8
49
(HO2S1
signal)
56
Engine speed held at 2,000
rpm constant under no load.
• The voltage fluctuates between 0 to 0.3 V and 0.6 to 1.0 V
more than 5 times within 10 seconds.
• The maximum voltage is over 0.6 V at least 1 time.
• The minimum voltage is below 0.3 V at least 1 time.
• The voltage never exceeds 1.0 V.
1 time: 0 - 0.3 V
→
0.6 - 1.0 V
→
0 - 0.3 V
2 times: 0 - 0.3 V
→
0.6 - 1.0 V
→
0 - 0.3 V
→
0.6 - 1.0 V
→
0 - 0.3 V
EC-492
< DTC/CIRCUIT DIAGNOSIS >
[HR12DE (TYPE 2)]
HO2S1 HEATER
HO2S1 HEATER
Component Function Check
INFOID:0000000005886636
1.
CHECK HEATED OXYGEN SENSOR 2 HEATER FUNCTION
1.
Start engine and warm it up to normal operating temperature.
2.
Turn ignition switch OFF and wait at least 10 seconds.
3.
Set tester prove between ECM harness connector and ground.
4.
Start engine and let it idle.
5.
Check the voltage under the following conditions.
Verify that the oscilloscope screen shows the signal waves as shown below.
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Go to
Diagnosis Procedure
INFOID:0000000005886637
1.
CHECK GROUND CONNECTION
1.
Turn ignition switch OFF.
2.
Check ground connection E38. Refer to Ground Inspection in
XX-XX, "*****"
.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair or replace ground connection.
2.
CHECK HO2S1 POWER SUPPLY CIRCUIT
1.
Disconnect HO2S1 harness connector.
2.
Turn ignition switch ON.
3.
Check the voltage between HO2S1 harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> GO TO 3.
3.
DETECT MALFUNCTIONING PART
Check the following.
ECM
Condition
Voltage
Connector
Terminal
+
−
F7
3
(HO2S1 heater signal)
108
At idle
Approximately 2.9 - 8.8 V
Engine speed: Above 3,600 rpm
BATTERY VOLTAGE
(11 - 14V)
JMBIA0030GB
HO2S1
Ground
Voltage
Connector
Terminal
F46
2
Ground
Battery voltage
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