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SEF940Z
DTC Confirmation Procedure
NHEC0215
SEF941Z
SEF535Z
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
NHEC0215S01
TESTING CONDITION:
I Open engine hood before conducting the following proce-
dure.
I Do not hold engine speed for more than the specified
minutes below.
1) Turn ignition switch “ON”.
2) Select “DTC & SRT CONFIRMATION” then “SRT WORK SUP-
PORT” mode with CONSULT-II.
3) Start engine.
4) 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
7.
5) Wait 5 seconds at idle.
6) Rev engine up to 2,500 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.
7) Select “SELF-DIAG RESULTS” mode with CONSULT-II.
8) Confirm that the 1st trip DTC is not detected.
If the 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-359.
SEF329X
SEF330X
Overall Function Check
NHEC0216
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.
CAUTION:
Always drive vehicle at a safe speed.
WITH GST
NHEC0216S01
1) Start engine and drive vehicle at a speed of more than 70 km/h
(43 MPH) for 2 consecutive minutes.
2) Stop vehicle with engine running.
3) Set voltmeters probes between ECM terminals 63 [HO2S1
(B1) signal], 62 [HO2S1 (B2) signal] and engine ground, and
ECM terminals 72 [HO2S2 (B1) signal], 71 [HO2S2 (B2) sig-
nal] and engine ground.
4) Keep engine speed at 2,000 rpm constant under no load.
5) Make sure that the voltage switching frequency (high & low)
between ECM terminals 72 and engine ground, or 71 and
engine ground is very less than that of ECM terminals 63 and
engine ground, or 62 and engine ground.
Switching frequency ratio = A/B
A: Heated oxygen sensor 2 (rear) voltage switching fre-
quency
DTC P0420 (BANK 1), P0430 (BANK 2) THREE WAY CATALYST FUNCTION
DTC Confirmation Procedure
EC-358
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