2007 NISSAN TIIDA OBD port

P0300, P0301, P0302, P0303, P0304 MISFIRE
EC-193
< COMPONENT DIAGNOSIS >[HR16DE (WITH EURO-OBD)]
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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 EM-47, "
Removal and Installa-
tion".
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 EM-47, "
Removal
and Installation".
9.CHECK COMPRESSION PRESSURE
Check compression pressure. Refer to EM-24, "
Inspection".
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
Check fuel pressure. Refer to EC-377, "
Inspection".
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
For procedure, refer to EC-26, "
IGNITION TIMING : Special Repair Requirement".
For specification, refer to EC-380, "
Idle Speed" and EC-380, "Ignition Timing".
Is the inspection result normal?
YES >> GO TO 13.
NO >> Follow the EC-26, "
IGNITION TIMING : Special Repair Requirement".
13.CHECK HEATED OXYGEN SENSOR 1 HEATER
Refer to EC-164, "
Component Inspection".
Is the inspection result normal?
YES >> GO TO 14.
NO >> Replace heated oxygen sensor 1.
14.CHECK MASS AIR FLOW SENSOR
SEF156I
Spark should be generated.

P0420 THREE WAY CATALYST FUNCTION
EC-205
< COMPONENT DIAGNOSIS >[HR16DE (WITH EURO-OBD)]
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P0420 THREE WAY CATALYST FUNCTION
DTC LogicINFOID:0000000001670968
DTC DETECTION LOGIC
The ECM monitors the switching frequency ratio of heated oxygen
sensor 1 and heated oxygen sensor 2.
A three way catalyst (manifold) with high oxygen storage capacity
will indicate a low switching frequency of heated oxygen sensor 2.
As oxygen storage capacity decreases, the heated oxygen sensor 2
switching frequency will increase.
When the frequency ratio of heated oxygen sensor 1 and heated
oxygen sensor 2 approaches a specified limit value, the three way
catalyst (manifold) malfunction is diagnosed.
DTC CONFIRMATION PROCEDURE
1.INSPECTION START
Do you have CONSULT-III?
Do you have CONSULT-III?
YES >> GO TO 2.
NO >> GO TO 7.
2.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
TESTING CONDITION:
Do not hold engine speed for more than the specified minutes below.
>> GO TO 3.
3.PERFORM DTC CONFIRMATION PROCEDURE-I
With CONSULT-III
1. Turn ignition switch ON and select “DATA MONITOR” mode with CONSULT-III.
2. Start engine and warm it up to the 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. Make sure that “COOLAN TEMP/S” indicates more than 70°C (158°F).
If not, warm up engine and go to next step when “COOLAN TEMP/S” indication reaches to 70°C (158°F).
7. Open engine hood.
8. Select “DTC & SRT CONFIRMATION” then “SRT WORK SUPPORT” mode with CONSULT-III.
9. Rev engine up to 2,000 to 3,000 rpm and hold it for 3 consecutive minutes then release the accelerator
pedal completely.
10. Check the indication of “CATALYST”.
Which is displayed on CONSULT-III screen?
SEF484YF
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0420Catalyst system efficien-
cy below threshold Three way catalyst (manifold) does not oper-
ate properly.
 Three way catalyst (manifold) does not have
enough oxygen storage capacity. Three way catalyst (manifold)
 Exhaust tube
 Intake air leaks
 Fuel injector
 Fuel injector leaks
 Spark plug
 Improper ignition timing

EC-208
< COMPONENT DIAGNOSIS >[HR16DE (WITH EURO-OBD)]
P0420 THREE WAY CATALYST FUNCTION
Is the inspection result normal?
YES >> GO TO 6.
NO >> Perform EC-313, "
Diagnosis Procedure".
6.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 10.
NO >> GO TO 7.
7.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 8.
(+) (–)
Vo l ta g e
Connector Terminal Connector Terminal
F1025
E16 108 Battery voltage 29
30
31
Spark should be generated.
JMBIA0066GB
Spark should be generated.

P0420 THREE WAY CATALYST FUNCTION
EC-209
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NO >> Check ignition coil, power transistor and their circuits. Refer to EC-319, "Diagnosis Procedure".
8.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 EM-47, "
Removal and Installa-
tion".
NO >> Repair or clean spark plug. Then GO TO 9.
9.CHECK FUNCTION OF IGNITION COIL-III
1. Reconnect the initial spark plugs.
2. Crank engine for about three 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 EM-47, "
Removal
and Installation".
10.CHECK FUEL INJECTOR
1. Turn ignition switch OFF.
2. Remove fuel injector assembly.
Refer to EM-35, "
Removal and Installation".
Keep fuel hose and all fuel injectors connected to fuel tube.
3. Disconnect all ignition coil harness connectors.
4. Reconnect all fuel injector harness connectors disconnected.
5. Turn ignition switch ON.
Does fuel drip from fuel injector?
YES >> GO TO 11.
NO >> Replace the fuel injector(s) from which fuel is dripping.
11 .CHECK INTERMITTENT INCIDENT
Refer to GI-55, "
Intermittent Incident".
Is the trouble fixed?
YES >> INSPECTION END
NO >> Replace three way catalyst assembly.
SEF156I
Spark should be generated.

EC-234
< COMPONENT DIAGNOSIS >[HR16DE (WITH EURO-OBD)]
P1143 HO2S1
Before performing the following procedure, confirm that battery voltage is more than 11V at idle.
Do you have CONSULT-III?
YES >> GO TO 2.
NO >> GO TO 3.
2.PERFORM DTC CONFIRMATION PROCEDURE
1. Start engine and warm it up to normal operating temperature.
2. Stop engine and wait at least 10 seconds.
3. Turn ignition switch ON and select “HO2S1 (B1) P1143” of “HO2S1” in “DTC WORK SUPPORT” mode
with CONSULT-III.
4. Touch “START”.
5. Start engine and let it idle for at least 3 minutes.
NOTE:
Never raise engine speed above 3,600 rpm after this step. If the engine speed limit is exceeded,
return to step 5.
6. When the following conditions are met, “TESTING” will be displayed on the CONSULT-III screen. Maintain
the conditions continuously until “TESTING” changes to “COMPLETED”. (It will take approximately 50
seconds or more.)
CAUTION:
Always drive vehicle at a safe speed.
If “TESTING” is not displayed after 5 minutes, retry from step 2.
7. Touch “SELF-DIAG RESULT”
Which is displayed on CONSULT-III screen?
OK >> INSPECTION END
NG >> Go to EC-234, "
Diagnosis Procedure".
3.PERFORM COMPONENT FUNCTION CHECK
With GST
1. Start engine and warm it up to normal operating temperature.
2. Set voltmeter probes between ECM harness connector terminals as follows under the following condition.
NOTE:
Use component function check to check the overall function of the heated oxygen sensor 1 circuit. During this
check, a 1st trip DTC might not be confirmed.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Go to EC-234, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000001671006
1.CHECK GROUND CONNECTION
1. Turn ignition switch OFF.
2. Check ground connection E15. Refer to Ground Inspection in GI-58, "
Circuit Inspection".
Is the inspection result normal?
ENG SPEED 1,375 - 2,600 rpm
VHCL SPEED SE Less than 100 km/h (62 MPH)
B/FUEL SCHDL 3.7 - 10.0 msec
Shift lever Suitable position
ECM Ground
Condition Voltage
Connector Terminal Connector Terminal
F1149
(HO2S1 signal)F11 56Engine speed held at
2,000 rpm constant under
no load The maximum voltage is over 0.6 at least 1
time.
 The minimum voltage is over 0.1 at least 1
time.

P1144 HO2S1
EC-239
< COMPONENT DIAGNOSIS >[HR16DE (WITH EURO-OBD)]
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Do you have CONSULT-III?
YES >> GO TO 2.
NO >> GO TO 3.
2.PERFORM DTC CONFIRMATION PROCEDURE
1. Start engine and warm it up to normal operating temperature.
2. Stop engine and wait at least 10 seconds.
3. Turn ignition switch ON and select “HO2S1 (B1) P1144” of “HO2S1” in “DTC WORK SUPPORT” mode
with CONSULT-III.
4. Touch “START”.
5. Start engine and let it idle for at least 3 minutes.
NOTE:
Never raise engine speed above 3,600 rpm after this step. If the engine speed limit is exceeded,
return to step 5.
6. When the following conditions are met, “TESTING” will be displayed on the CONSULT-III screen. Maintain
the conditions continuously until “TESTING” changes to “COMPLETED”. (It will take approximately 50
seconds or more.)
CAUTION:
Always drive vehicle at a safe speed.
If “TESTING” is not displayed after 5 minutes, retry from step 2.
7. Touch “SELF-DIAG RESULT”
Which is displayed on CONSULT-III screen?
OK >> INSPECTION END
NG >> Go to EC-239, "
Diagnosis Procedure".
3.PERFORM COMPONENT FUNCTION CHECK
With GST
1. Start engine and warm it up to normal operating temperature.
2. Set voltmeter probes between ECM harness connector terminals as follows under the following condition.
NOTE:
Use component function check to check the overall function of the heated oxygen sensor 1 circuit. During this
check, a 1st trip DTC might not be confirmed.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Go to EC-239, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000001671010
1.CHECK GROUND CONNECTION
1. Turn ignition switch OFF.
2. Check ground connection E15. Refer to Ground Inspection in GI-58, "
Circuit Inspection".
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace ground connection.
ENG SPEED 1,375 - 2,600 rpm
VHCL SPEED SE Less than 100 km/h (62 MPH)
B/FUEL SCHDL 3.7 - 10.0 msec
Shift lever Suitable position
(+) (–)
Condition Voltage
Connector Terminal Connector Terminal
F1149
(HO2S1 signal)F11 56Engine speed held at 2,000 rpm
constant under no load The maximum voltage is over 0.8 at
least 1 time.
 The minimum voltage is over 0.35 at
least 1 time.

P1146 HO2S2
EC-243
< COMPONENT DIAGNOSIS >[HR16DE (WITH EURO-OBD)]
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P1146 HO2S2
DescriptionINFOID:0000000001671012
The heated oxygen sensor 2, after three way catalyst (manifold),
monitors the oxygen level in the exhaust gas on each bank.
Even if switching characteristics of the heated oxygen sensor 1 are
shifted, the air-fuel ratio is controlled to stoichiometric, by the signal
from the heated oxygen sensor 2.
This sensor is made of ceramic zirconia. The zirconia generates volt-
age from approximately 1V in richer conditions to 0V in leaner condi-
tions.
Under normal conditions the heated oxygen sensor 2 is not used for
engine control operation.
DTC LogicINFOID:0000000001671013
DTC DETECTION LOGIC
The heated oxygen sensor 2 has a much longer switching time
between rich and lean than the heated oxygen sensor 1. The oxygen
storage capacity of the three way catalyst (manifold) causes the
longer switching time. To judge the malfunctions of heated oxygen
sensor 2, ECM monitors whether the minimum voltage of the sensor
is sufficiently low during the various driving condition such as fuel-
cut.
DTC CONFIRMATION PROCEDURE
1.INSPECTION START
Do you have CONSULT-III?
Do you have CONSULT-III?
YES >> GO TO 2.
NO >> GO TO 11.
2.PRECONDITIONING
“COMPLETED” will appear on CONSULT-III screen when all tests “COND1”, “COND2” and “COND3” are
completed.
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
TESTING CONDITION:
For the best results, perform ″DTC WORK SUPPORT″ at a temperature of 0 to 30°C (32 to 86°F).
Never stop engine during this procedure. If the engine is stopped, retry this procedure from step 2 in
Procedure for COND1.
CAUTION:
Always drive at safe speed.
SEF327R
PBIB0554E
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1146Heated oxygen sensor 2
minimum voltage moni-
toringThe minimum voltage from the sensor is not
reached to the specified voltage. Harness or connectors
(The sensor circuit is open or shorted)
 Heated oxygen sensor 2
 Fuel pressure
 Fuel injector
 Intake air leaks

EC-244
< COMPONENT DIAGNOSIS >[HR16DE (WITH EURO-OBD)]
P1146 HO2S2
>> GO TO 3.
3.PERFORM PROCEDURE FOR COND1-I
Start engine and warm it up to normal operating temperature.
>> GO TO 4.
4.PERFORM PROCEDURE FOR COND1-II
Turn ignition switch OFF and wait at least 10 seconds.
>> GO TO 5.
5.PERFORM PROCEDURE FOR COND1-IV
1. Start engine and keep the engine speed between 3,500 and 4,000 rpm for at least 1 minute under no load.
2. Let engine idle 1 minute.
3. Select “HO2S2 (B1) P1146” of “HO2S2” in “DTC WORK SUPPORT” mode with CONSULT-III.
4. Touch “START”.
5. Start engine and let it idle for at least 30 seconds.
6. Rev engine up to 2,000 rpm two or three times quickly under no load.
Is
“CONPLETED” appears on CONSULT-III screen?
YES >> GO TO 9.
NO >> GO TO 6.
6.PERFORM PROCEDURE FOR COND1-I
When the following conditions are met, “TESTING” will be displayed at “COND1” on the CONSULT-III screen.
Maintain the condition continuously until “TESTING” changes to “COMPLETED” (It will take approximately 60
seconds.)
Which displayed on CONSULT-III screen?
COND1: OUT OF CONDITION>>GO TO 4.
COND1: COMPLETED COND2: INCOMPLETED>>GO TO 7.
COND1: COMPLETED COND2: COMPLETED>>GO TO 8.
7.PERFORM PROCEDURE FOR COND2
While driving, release accelerator pedal completely from the above condition until “INCOMPLETED” at
“COND2” on CONSULT-III screen has turned to “COMPLETED”. (It will take approximately 4 seconds.)
Which displayed on CONSULT-III screen?
COND2: COMPLETED COND3: INCOMPLETED>>GO TO 8.
COND2: COMPLETED COND3: COMPLETED>>GO TO 9.
8.PERFORM PROCEDURE FOR COND3
Stop vehicle and let it idle until “INCOMPLETED” of “COND3” on CONSULT-III screen has turned to “COM-
PLETED”. (It will take a maximum of approximately 6 minutes.)
>> GO TO 9.
9.PERFORM PROCEDURE FOR COND3-I
Touch “SELF DIAGRESULTS”.
Which displayed on CONSULT-III screen?
OK >> INSPECTION END
NG >> Go to EC-246, "
Diagnosis Procedure".
ENG SPEED More than 1,000 rpm
B/FUEL SCHDL More than 1.0 msec
COOLAN TEMP/S More than 70°C (158°F)
Shift level Suitable position