Nissan Sentra Service Manual: Diagnosis description : counter system
RELATIONSHIP BETWEEN MIL, 1ST TRIP DTC, DTC, AND DETECTABLE ITEMS
- When a malfunction is detected for the first time, the 1st trip DTC and
the 1st trip freeze frame data are
stored in the ECM memory.
- When the same malfunction is detected in two consecutive trips, the DTC
and the freeze frame data are
stored in the ECM memory, and the MIL will come on.
- The MIL will turn OFF after the vehicle is driven 3 times (driving
pattern B) with no malfunction. The drive is
counted only when the recorded driving pattern is met (as stored in the ECM).
If another malfunction occurs
while counting, the counter will reset.
- The DTC and the freeze frame data will be stored until the vehicle is
driven 40 times (driving pattern A) without
the same malfunction recurring (except for Misfire and Fuel Injection
System). For Misfire and Fuel Injection
System, the DTC and freeze frame data will be stored until the vehicle is
driven 80 times (driving pattern
C) without the same malfunction recurring. The “TIME” in “SELF-DIAGNOSTIC
RESULTS” mode of CONSULT
will count the number of times the vehicle is driven.
- The 1st trip DTC is not displayed when the self-diagnosis results in OK
for the 2nd trip.
Counter system chart

For details about patterns B and C under “Fuel Injection System” and
“Misfire”, see “EXPLANATION FOR
DRIVING PATTERNS FOR “MISFIRE <EXHAUST QUALITY DETERIORATION>”, “FUEL INJECTION
SYSTEM”.
For details about patterns A and B under Other, see “EXPLANATION FOR DRIVING
PATTERNS FOR “MISFIRE
<EXHAUST QUALITY DETERIORATION>”, “FUEL INJECTION SYSTEM”.
- *1: Clear timing is at the moment OK is detected.
- *2: Clear timing is when the same malfunction is detected in the 2nd
trip.
Relationship Between MIL, DTC, 1st Trip DTC and Driving Patterns for “Misfire
<Exhaust Quality Deterioration>”,
“Fuel Injection System”

- When the same malfunction is detected
in two consecutive trips, MIL
will light up.
- MIL will turn OFF after vehicle is driven
3 times (pattern B) without any
malfunctions.
- When the same malfunction is detected
in two consecutive trips, the
DTC and the freeze frame data will be
stored in ECM.
- The DTC and the freeze frame data
will not be displayed any longer after
vehicle is driven 80 times (pattern C)
without the same malfunction. (The
DTC and the freeze frame data still
remain in ECM.)
- When a malfunction is detected for
the first time, the 1st trip DTC and the
1st trip freeze frame data will be
stored in ECM.
- The 1st trip DTC and the 1st trip
freeze frame data will be cleared at
the moment OK is detected.
- When the same malfunction is detected
in the 2nd trip, the 1st trip
freeze frame data will be cleared.
- 1st trip DTC will be cleared when vehicle
is driven once (pattern C) without
the same malfunction after DTC
is stored in ECM.
Explanation for Driving Patterns for “Misfire <Exhaust Quality
Deterioration>”, “Fuel Injection System”
Driving Pattern B
Refer to EC-60, "DIAGNOSIS DESCRIPTION : Driving Pattern".
Driving Pattern C
Refer to EC-60, "DIAGNOSIS DESCRIPTION : Driving Pattern".
Example:
If the stored freeze frame data is as per the following:
Engine speed: 850 rpm, Calculated load value: 30%, Engine coolant temperature:
80В°C (176В°F)
To be satisfied with driving pattern C, the vehicle should run under the
following conditions:
Engine speed: 475 – 1,225 rpm, Calculated load value: 27 – 33%, Engine coolant
temperature: more than
70В°C (158В°F)
Relationship Between MIL, DTC, 1st Trip DTC and Driving Patterns Except For
“Misfire <Exhaust
Quality Deterioration>”, “Fuel Injection System”

- When the same malfunction is detected
in two consecutive trips, MIL
will light up.
- MIL will turn OFF after vehicle is driven
3 times (pattern B) without any
malfunctions.
- When the same malfunction is detected
in two consecutive trips, the
DTC and the freeze frame data will be
stored in ECM.
- The DTC and the freeze frame data
will not be displayed any longer after
vehicle is driven 40 times (pattern A)
without the same malfunction.
(The DTC and the freeze frame data
still remain in ECM.)
- When a malfunction is detected for
the first time, the 1st trip DTC and the
1st trip freeze frame data will be
stored in ECM.
- 1st trip DTC will be cleared after vehicle
is driven once (pattern B) without
the same malfunction.
- When the same malfunction is detected
in the 2nd trip, the 1st trip
freeze frame data will be cleared.
Explanation for Driving Patterns Except for “Misfire <Exhaust Quality
Deterioration>”, “Fuel Injection
System”
Driving Pattern A
Refer to EC-60, "DIAGNOSIS DESCRIPTION : Driving Pattern".
Driving Pattern B
Refer to EC-60, "DIAGNOSIS DESCRIPTION : Driving Pattern".
Diagnosis description : 1st trip detection
logic and two trip detection logic
When a malfunction is detected for the first time, 1st trip DTC and 1st trip
Freeze Frame data are stored in the
ECM ...
DRIVING PATTERN A
Driving pattern A means a trip satisfying the following conditions.
Engine speed reaches 400 rpm or more.
Engine coolant temperature rises by 20В°C (36В°F) or more after s ...
Other materials:
Low tire pressure warning lamp
Component Function Check
1.CHECK THE ILLUMINATION OF THE LOW TIRE PRESSURE WARNING LAMP
Check that the low tire pressure warning lamp is turned OFF after
illuminating for approximately 1 second,
when the ignition switch is turned ON.
Is the inspection result normal?
YES >> Inspection ...
Booster seats
Precautions on booster seats
WARNINGIf a booster seat and seat belt are not
used
properly, the risk of a child being injured in
a sudden stop or collision greatly
increases:
Make sure the shoulder portion of
the belt is away from the child’s face
and neck and t ...
Consult function
FUNCTION
Diagnostic test mode
Function
Self Diagnostic Results
Self-diagnostic results such as 1st trip DTC, DTCs and 1st trip
freeze frame data or freeze frame data
can be read and erased quickly.*
Data Monitor
Input/Output data in the ECM can be read.
...
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