Nissan Note [1057/1872] Dtc p0420 three way catalyst function

Nissan Note [1057/1872] Dtc p0420 three way catalyst function
DTC P0420 THREE WAY CATALYST FUNCTION
EC-1057
[HR (WITH EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
M
A
EC
9. 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 “COOLAN TEMP/S” in “DATA
MONITOR mode with CONSULT-II.
c. Start engine and warm it up while monitoring “COOLAN TEMP/
S” indication on CONSULT-II.
d. When “COOLAN TEMP/S” indication reaches to 70°(158°F), go
to step 3.
10. Select “SELF-DIAG RESULTS” mode with CONSULT-II.
11. Confirm that the 1st trip DTC is not detected.
If the 1st trip DTC is detected, go to EC-1059, "
Diagnostic Pro-
cedure" .
Overall Function Check
BBS004EB
Use this procedure to check the overall function of the three way catalyst (manifold). During this check, a 1st
trip DTC might not be confirmed.
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 1 minute under no load.
4. Let engine idle for 1 minute.
5. Set voltmeters probes between ECM terminal 49 (HO2S1 sig-
nal) and ground, and ECM terminal 50 (HO2S2 signal) and
ground.
6. Keep engine speed at 2,000 rpm constant under no load.
PBIB0567E
SEF013Y
SEF535Z
PBIA9566J

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