Nissan Frontier D22. Manual — part 238
ON BOARD DIAGNOSTIC (OBD) SYSTEM
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SRT Set Timing
SRT is set as “CMPLT” after self-diagnosis has been performed one or more times. Completion of SRT is
done regardless of whether the result is OK or NG. The set timing is different between them and is shown in
the following table.
OK: Self-diagnosis is carried out and the result is OK.
NG: Self-diagnosis is carried out and the result is NG.
—: Self-diagnosis is not carried out.
When all SRT related self-diagnoses showed OK results in a same cycle (Ignition OFF – ON – OFF), the SRT
will indicate “CMPLT”.
→ Case 1 above
When all SRT related self-diagnoses show OK results through several different cycles, the SRT will indicate
“CMPLT” at the time the respective self-diagnoses have at least one OK result.
→ Case 2 above
If one or more SRT related self-diagnoses showed NG results in 2 consecutive cycles, the SRT will also indi-
cate “COMPLT”.
→ Case 3 above
The previous table shows that the minimum number of cycles for setting SRT as “INCMP” is one (1) for each
self-diagnosis (Case 1 and 2) or two (2) for one self-diagnosis (Case 3). However, in preparation for the State
emissions inspection, it is unnecessary of each self-diagnosis to be executed twice (Case 3) because of the
following reasons;
●
The SRT will indicate “CMPLT” at the time the respective self-diagnoses have one (1) OK result.
●
The emissions inspection requires “CMPLT” of the SRT only with OK self-diagnostic results.
●
When, during SRT driving pattern, 1st trip DTC (NG) is detected prior to “CMPLT” of SRT, the self-diagno-
sis memory must be erased from ECM after repair.
●
If the 1st trip DTC is erased, all the SRT will indicate “INCMP”.
NOTE:
SRT can be set as “CMPLT” together with the DTC(s). Therefore, DTC check must always be carried out prior
to the State emission inspection even though the SRT indicates “CMPLT”.
Self-diagnosis result
Example
Diagnosis
Ignition cycle
← ON → OFF
← ON → OFF
← ON → OFF
← ON →
All OK
Case 1
P0400
OK (1)
— (1)
OK (2)
— (2)
P0402
OK (1)
— (1)
— (1)
OK (2)
P1402
OK (1)
OK (2)
— (2)
— (2)
SRT of EGR
“CMPLT”
“CMPLT”
“CMPLT”
“CMPLT”
Case 2
P0400
OK (1)
— (1)
— (1)
— (1)
P0402
— (0)
— (0)
OK (1)
— (1)
P1402
OK (1)
OK (2)
— (2)
— (2)
SRT of EGR
“INCMP”
“INCMP”
“CMPLT”
“CMPLT”
NG exists
Case 3
P0400
OK
OK
—
—
P0402
—
—
—
—
P1402
NG
—
NG
NG
(Consecutive
NG)
(1st trip)
DTC
1st trip DTC
—
1st trip DTC
DTC
(= MIL “ON”)
SRT of EGR
“INCMP”
“INCMP”
“INCMP”
“CMPLT”
EC-56
[KA24DE]
ON BOARD DIAGNOSTIC (OBD) SYSTEM
SRT Service Procedure
If a vehicle has been rejected for the State emissions inspection due to one or more SRT items indicating
“INCMP”, review the following flowchart diagnostic sequence.
How to Display SRT Code
With CONSULT-II
For items whose SRT codes are set, a “CMPLT” is displayed on the CONSULT-II screen; for items whose SRT
codes are not set, “INCMP” is displayed.
Selecting “SRT STATUS” in “DTC CONFIRMATION” mode with CONSULT-II.
A sample of CONSULT-II display for SRT code is shown below.
*1
*2
*3
SEF170Z
ON BOARD DIAGNOSTIC (OBD) SYSTEM
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“INCMP” means the self-diagnosis is incomplete and SRT is not set.
“CMPLT” means the self-diagnosis is complete and SRT is set.
With GST
Selecting Mode 1 with GST (Generic Scan Tool)
How to Set SRT Code
To set all SRT codes, self-diagnosis for the items indicated above must be performed one or more times. Each
diagnosis may require a long period of actual driving under various conditions.
With CONSULT-II
Perform corresponding DTC confirmation procedure one by one based on “Performance Priority” in the table
on
Without CONSULT-II
The most efficient driving pattern in which SRT codes can be properly set is explained on
. The driving pattern should be performed one or more times to set all SRT codes.
SEF713Y
EC-58
[KA24DE]
ON BOARD DIAGNOSTIC (OBD) SYSTEM
Driving Pattern
PBIB1400E
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