Nissan Qashqai (2007-2010). Manual — part 263
HO2S1
EC-571
< COMPONENT DIAGNOSIS >
[HR16DE (WITHOUT EURO-OBD)]
C
D
E
F
G
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A
EC
N
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O
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 MASS AIR FLOW SENSOR
Check mass air flow sensor.
Refer to
EC-458, "Component Inspection"
Is the inspection result normal?
YES
>> GO TO 8.
NO
>> Replace mass air flow sensor.
8.
CHECK PCV VALVE
EC-935, "Component Inspection"
Is the inspection result normal?
YES
>> GO TO 9.
NO
>> Repair or replace PCV valve.
9.
CHECK HEATED OXYGEN SENSOR 1
Perform
EC-573, "Component Inspection"
Is the inspection result normal?
YES
>> GO TO 10.
NO
>> Replace heated oxygen sensor 1.
10.
CHECK INTERMITTENT INCIDENT
GI-39, "Intermittent Incident"
.
>> INSPECTION END
Component Inspection
INFOID:0000000001096813
HO2S1
ECM
Continuity
Connector
Terminal
Connector
Terminal
F30
1
F8
56
existed
HO2S1
ECM
Continuity
Connector
Terminal
Connector
Terminal
F30
1
F8
56
Existed
HO2S1
ECM
Ground
Continuity
Connector
Terminal
Connector
Terminal
F30
4
F8
49
Ground
Not existed
EC-572
< COMPONENT DIAGNOSIS >
[HR16DE (WITHOUT EURO-OBD)]
HO2S1
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 0.6V at least once.
-
“HO2S1 (B1)” voltage goes below 0.3V at least once.
-
“HO2S1 (B1)” voltage never exceeds 1.0V.
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 using Oxygen Sensor
Thread Cleaner tool and approved anti-seize lubricant.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> GO TO 3.
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.
SEF217YA
JMBIA0352ZZ
HO2S1
EC-573
< COMPONENT DIAGNOSIS >
[HR16DE (WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
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 using Oxygen Sensor Thread
Cleaner tool and approved anti-seize lubricant.
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 oxygen sensor, clean exhaust system threads using Oxygen Sensor Thread
Cleaner tool and approved anti-seize lubricant.
>> INSPECTION END
ECM
ground
Condition
Voltage
Connector
Terminal
F8
49
(HO2S1 signal)
Ground
Engine speed held at 2,000
rpm constant under no load.
• The voltage fluctuates between 0 to 0.3V and 0.6 to
1.0V more than 5 times within 10 seconds.
• The maximum voltage is over 0.6V at least 1 time.
• The minimum voltage is below 0.3V at least 1 time.
• The voltage never exceeds 1.0V.
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
EC-574
< COMPONENT DIAGNOSIS >
[HR16DE (WITHOUT EURO-OBD)]
HO2S1 HEATER
HO2S1 HEATER
Description
INFOID:0000000001096818
SYSTEM DESCRIPTION
The ECM performs ON/OFF duty control of the Heated oxygen sensor 1 heater corresponding to the engine
operating condition to keep the temperature of Heated oxygen sensor 1 element at the specified range.
OPERATION
Component Function Check
INFOID:0000000001102383
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 connection 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:0000000001096820
1.
CHECK GROUND CONNECTION
1.
Turn ignition switch OFF.
2.
Check ground connection E21. Refer to Ground Inspection in
.
Is the inspection result normal?
YES
>> GO TO 2.
Sensor
Input Signal to ECM
ECM function
Actuator
Camshaft position sensor (PHASE)
Crankshaft position sensor (POS)
Engine speed
Heated oxygen sensor 1
heater control
Heated oxygen sensor 1
heater
Mass air flow sensor
Amount of intake air
Engine speed rpm
Heated oxygen sensor 1 heater
Above 3,600
OFF
Below 3,600 rpm after the following conditions are met.
• Engine: After warming up
ON
ECM
Ground
Condition
Voltage
Connector
Terminal
F7
3
(HO2S1 HEATER signal)
Ground
At idle
Approximately 7.0
Engine speed is above 3,600
rpm
BATTERY VOLTAGE
(11 - 14V)
JMBIA0325GB
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