Nissan Qashqai (2007-2010). Manual — part 167
P0300, P0301, P0302, P0303, P0304 MISFIRE
EC-187
< COMPONENT DIAGNOSIS >
[HR16DE (WITH EURO-OBD)]
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2.
Listen to each fuel injector operating sound.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Perform trouble diagnosis for FUEL INJECTOR, refer to
EC-304, "Component Inspection"
.
5.
CHECK FUNCTION OF IGNITION COIL-I
CAUTION:
Do the following procedure in the place where ventilation is good without the combustible.
1.
Turn ignition switch OFF.
2.
Remove fuel pump fuse in IPDM E/R to release fuel pressure.
NOTE:
Do not use CONSULT-III to release fuel pressure, or fuel pressure applies again during the following pro-
cedure.
3.
Start engine.
4.
After engine stalls, crank it two or three times to release all fuel pressure.
5.
Turn ignition switch OFF.
6.
Remove all ignition coil harness connectors to avoid the electrical discharge from the ignition coils.
7.
Remove ignition coil and spark plug of the cylinder to be checked.
8.
Crank engine for 5 seconds or more to remove combustion gas in the cylinder.
9.
Connect spark plug and harness connector to ignition coil.
10. Fix ignition coil using a rope etc. with gap of 13 - 17 mm (0.52 -
0.66 in) between the edge of the spark plug and grounded metal
portion as shown in the figure.
11. Crank engine for about 3 seconds, and check whether spark is
generated between the spark plug and the grounded metal por-
tion.
CAUTION:
• Do not approach to the spark plug and the ignition coil
within 50 cm (19.7 in). Be careful not to get an electrical
shock while checking, because the electrical discharge
voltage becomes 20kV or more.
• It might cause to damage the ignition coil if the gap of more than 17 mm (0.66 in) is taken.
NOTE:
When the gap is less than 13 mm (0.52 in), the spark might be generated even if the coil is mal-
functioning.
Is the inspection result normal?
YES
>> GO TO 9.
NO
>> GO TO 6.
6.
CHECK FUNCTION OF IGNITION COIL-II
1.
Turn ignition switch OFF.
2.
Disconnect spark plug and connect a known-good spark plug.
3.
Crank engine for about 3 seconds, and recheck whether spark is generated between the spark plug and
the grounded metal portion.
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> Check ignition coil, power transistor and their circuits. Refer to
.
Clicking noise should be heard.
PBIB3332E
Spark should be generated.
JMBIA0066GB
Spark should be generated.
EC-188
< COMPONENT DIAGNOSIS >
[HR16DE (WITH EURO-OBD)]
P0300, P0301, P0302, P0303, P0304 MISFIRE
7.
CHECK SPARK PLUG
Check the initial spark plug for fouling, etc.
Is the inspection result normal?
YES
>> Replace spark plug(s) with standard type one(s). For
spark plug type, refer to
.
NO
>> Repair or clean spark plug. Then GO TO 8
8.
CHECK FUNCTION OF IGNITION COIL-III
1.
Reconnect the initial spark plugs.
2.
Crank engine for about 3 seconds, and recheck whether spark is generated between the spark plug and
the grounded portion.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace spark plug(s) with standard type one(s). For spark plug type, refer to
.
9.
CHECK COMPRESSION PRESSURE
Check compression pressure. Refer to
.
Is the inspection result normal?
YES
>> GO TO 10.
NO
>> Check pistons, piston rings, valves, valve seats and cylinder head gaskets.
10.
CHECK FUEL PRESSURE
1.
Install all removed parts.
2.
Release fuel pressure to zero. Refer to
3.
Install fuel pressure gauge and check fuel pressure. Refer to
Is the inspection result normal?
YES
>> GO TO 12.
NO
>> GO TO 11.
11.
DETECT MALFUNCTIONING PART
Check fuel hoses and fuel tubes for clogging.
Is the inspection result normal?
YES
>> Replace “fuel filter and fuel pump assembly”.
NO
>> Repair or replace.
12.
CHECK IGNITION TIMING
Check the following items.
For procedure, refer to
EC-26, "BASIC INSPECTION : Special Repair Requirement"
For specification, refer to
Is the inspection result normal?
YES
>> GO TO 13.
NO
>> Follow the
EC-26, "BASIC INSPECTION : Special Repair Requirement"
13.
CHECK HO2S1 INPUT SIGNAL CIRCUIT
1.
Turn ignition switch OFF.
SEF156I
Spark should be generated.
At idling: Approximately 350 kPa (3.5 bar, 3.57 kg/cm
2
, 51 psi)
P0300, P0301, P0302, P0303, P0304 MISFIRE
EC-189
< COMPONENT DIAGNOSIS >
[HR16DE (WITH EURO-OBD)]
C
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2.
Disconnect corresponding HO2S1 harness connector.
3.
Disconnect ECM harness connector.
4.
Check the continuity between HO2S1 harness connector and ECM harness connector.
5.
Check the continuity between HO2S1 harness connector or ECM harness connector and ground.
6.
Also check harness for short to power.
Is the inspection result normal?
YES
>> GO TO 14.
NO
>> Repair open circuit or short to ground or short to power in harness or connectors.
14.
CHECK HO2S1 HEATER
EC-158, "Component Inspection"
Is the inspection result normal?
YES
>> GO TO 15.
NO
>> Replace HO2S sensor 1.
15.
CHECK MASS AIR FLOW SENSOR
With CONSULT-III
Check “MASS AIR FLOW” in “DATA MONITOR” mode with CONSULT-III.
With GST
Check mass air flow sensor signal in Service $01 with GST.
Is the measurement value within the specification?
YES
>> GO TO 16.
NO
>> Check connectors for rusted terminals or loose connections in the mass air flow sensor circuit or
ground. Refer to
.
16.
CHECK SYMPTOM TABLE
Check items on the rough idle symptom in
.
Is the inspection result normal?
YES
>> GO TO 17.
NO
>> Repair or replace.
17.
ERASE THE 1ST TRIP DTC
Some tests may cause a 1st trip DTC to be set.
Erase the 1st trip DTC from the ECM memory after performing the tests. Refer to
.
>> GO TO 18.
18.
CHECK INTERMITTENT INCIDENT
HO2S1
ECM
Continuity
Connector
Terminal
Connector
Terminal
F30
4
F8
49
Existed
HO2S1
ECM
Ground
Continuity
Connector
Terminal
Connector
Terminal
F30
4
F8
49
Ground
Not existed
1.0 - 4.0 g·m/sec
: at idling
2.0 - 10.0 g·m/sec
: at 2,500 rpm
1.0 - 4.0 g·m/sec
: at idling
2.0 - 10.0 g·m/sec
: at 2,500 rpm
EC-190
< COMPONENT DIAGNOSIS >
[HR16DE (WITH EURO-OBD)]
P0300, P0301, P0302, P0303, P0304 MISFIRE
GI-39, "Intermittent Incident"
>> INSPECTION END
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