Nissan Almera Tino V10. Manual — part 383
EC-358
[QG (WITH EURO-OBD)]
DTC P0420 THREE WAY CATALYST FUNCTION (M/T MODELS)
3.
CHECK INTAKE AIR LEAK
Listen for an intake air leak after the mass air flow sensor.
OK or NG
OK
>> GO TO 4.
NG
>> Repair or replace.
4.
CHECK IGNITION TIMING
Check the following items. Refer to
.
OK or NG
OK
>> GO TO 5.
NG
>> Follow the “Basic Inspection”.
5.
CHECK INJECTORS
1.
Stop engine and then turn ignition switch “ON”.
2.
Check voltage between ECM terminals 22, 23, 41, 42 and
ground with CONSULT-II or tester.
Refer to Wiring Diagram for Injectors,
.
OK or NG
OK
>> GO TO 6.
NG
>> Perform
EC-526, "Diagnostic Procedure"
.
6.
CHECK IGNITION SPARK
1.
Turn ignition switch “OFF”.
2.
Disconnect ignition coil assembly from rocker cover.
3.
Connect a known-good spark plug to the ignition coil assembly.
4.
Place end of spark plug against a suitable ground and crank engine.
5.
Check for spark.
OK or NG
OK
>> GO TO 7.
NG
>> Check ignition coil with power transistor and their circuit.
Refer to
.
Items
Specifications
Ignition timing
8
° ±
5
°
BTDC (in “Neutral” position)
Target idle speed
700
±
50 rpm (in “Neutral” position)
Battery voltage should exist.
MBIB0030E
SEF575Q
DTC P0420 THREE WAY CATALYST FUNCTION (M/T MODELS)
EC-359
[QG (WITH EURO-OBD)]
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EC
7.
CHECK INJECTOR
1.
Turn ignition switch “OFF”.
2.
Remove injector assembly.
Refer to
EM-29, "FUEL INJECTOR AND FUEL TUBE"
.
Keep fuel hose and all injectors connected to injector gallery.
3.
Disconnect all ignition coil harness connectors.
4.
Turn ignition switch “ON”.
Make sure fuel does not drip from injector.
OK or NG
OK (Does not drip.)>>GO TO 8.
NG (Drips.)>>Replace the injector(s) from which fuel is dripping.
8.
CHECK INTERMITTENT INCIDENT
Refer to
EC-138, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"
.
Trouble is fixed.>>INSPECTION END
Trouble is not fixed.>>Replace three way catalyst (Manifold).
EC-360
[QG (WITH EURO-OBD)]
DTC P0420, P0430 THREE WAY CATALYST FUNCTION (A/T MODELS)
DTC P0420, P0430 THREE WAY CATALYST FUNCTION (A/T MODELS)
PFP:208A0
On Board Diagnosis Logic
EBS00QNS
The ECM monitors the switching frequency ratio of heated oxygen
sensors 1 and 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 sensors 1 and 2
approaches a specified limit value, the three way catalyst (Manifold)
malfunction is diagnosed.
DTC Confirmation Procedure
EBS00QNT
NOTE:
If “DTC Confirmation Procedure” has been previously conducted, always turn ignition switch “OFF” and wait at
least 10 seconds before conducting the next test.
WITH CONSULT-II
TESTING CONDITION:
●
Open engine hood before conducting the following procedure.
●
Do not hold engine speed for more than the specified minutes below.
1.
Start engine and warm it up to the normal operating temperature.
2.
Turn ignition switch “OFF” and wait at least 10 seconds.
3.
Start engine and keep the engine speed between 3,500 and 4,000 rpm for at least one minute under no
load.
4.
Let engine idle for one minute.
5.
Select “DTC & SRT CONFIRMATION” then “SRT WORK SUP-
PORT” mode with CONSULT-II.
6.
Rev engine up to 2,500 to 3,500 rpm and hold it for 3 consecu-
tive minutes then release the accelerator pedal completely.
If “INCMP” of “CATALYST” changed to “COMPLT”, go to step 9
7.
Wait 5 seconds at idle.
SEF484YF
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P0420
0420
(Bank 1)
Catalyst system efficiency
below threshold
●
Three way catalyst (Manifold) does not operate
properly.
●
Three way catalyst (Manifold) does not have
enough oxygen storage capacity.
●
Three way catalyst (Manifold)
●
Exhaust tube
●
Intake air leaks
●
Fuel injectors
●
Fuel injector leaks
●
Spark plug
●
Improper ignition timing
P0430
0430
(Bank 2)
PBIB0566E
DTC P0420, P0430 THREE WAY CATALYST FUNCTION (A/T MODELS)
EC-361
[QG (WITH EURO-OBD)]
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EC
8.
Rev engine up to 2,000 to 3,000 rpm and maintain it until
“INCMP” of “CATALYST” changes to “CMPLT” (It will take
approximately 5 minutes).
If not “CMPLT”, stop engine and cool it down to less than 70
°
C
(158
°
F) and then retest from step 1.
a.
Turn ignition switch “OFF” and leave the vehicle in a cool place
(soak the vehicle).
b.
Turn ignition switch “ON” and select “COOLANTEMP/S
″
”in
“DATA MONITOR” mode with CONSULT-II.
c.
Start engine and warm it up while monitoring “COOLANTEMP/
S” indication on CONSULT-II.
d.
When “COOLANTEMP/S” indication reaches to 70
°
C (158
°
F),
go to step 3.
9.
Select “SELF-DIAG RESULTS” mode with CONSULT-II.
10. Confirm that the 1st trip DTC is not detected.
If the 1st trip DTC is detected, go to
.
Overall Function Check
EBS00QNU
Use this procedure to check the overall function of the three way catalyst (Manifold). During this check, a DTC
might not be confirmed.
CAUTION:
Always drive vehicle at a safe speed.
WITH GST
1.
Start engine and warm it up to the normal operating temperature.
2.
Turn ignition switch “OFF” and wait at least 10 seconds.
3.
Start engine and keep the engine speed between 3,500 and 4,000 rpm for at least one minute under no
load.
4.
Let engine idle for one minute.
PBIB0567E
SEF013Y
SEF535Z
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