Nissan Frontier D22. Manual — part 533
ON BOARD DIAGNOSTIC (OBD) SYSTEM
EC-1235
[VG33ER]
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Malfunction Indicator Lamp (MIL)
UBS00DS1
DESCRIPTION
The MIL is located on the instrument panel.
1.
The MIL will light up when the ignition switch is turned ON with-
out the engine running. This is a bulb check.
If the MIL does not light up, refer to
or see
2.
When the engine is started, the MIL should go OFF.
If the MIL remains on, the on board diagnostic system has
detected an engine system malfunction.
ON BOARD DIAGNOSTIC SYSTEM FUNCTION
The on board diagnostic system has the following two functions.
DIAGNOSTIC TEST MODE I — BULB CHECK
In this mode, the MIL on the instrument panel should stay ON. If it remains OFF, check the bulb. Refer to
or see
.
DIAGNOSTIC TEST MODE I — MALFUNCTION WARNING
OBD System Operation Chart
UBS00DS2
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. For details, refer to “Two Trip Detection Logic” on
EC-1220, "Two Trip Detection Logic"
●
The MIL will go off after the vehicle is driven 3 times 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
SEF217U
Diagnostic Test
Mode
KEY and ENG.
Status
Function
Explanation of Function
Mode I
Ignition switch in
ON position
Engine stopped
BULB CHECK
This function checks the MIL bulb for damage (blown,
open circuit, etc.).
If the MIL does not come on, check MIL circuit. (See
1739, "MIL AND DATA LINK CONNECTOR"
Engine running
MALFUNCTION
WARNING
This is a usual driving condition. When a malfunction is
detected twice in two consecutive driving cycles (two trip
detection logic), the MIL will light up to inform the driver
that a malfunction has been detected.
The following malfunctions will light up or blink the MIL in
the 1st trip.
●
Misfire (Possible three way catalyst damage)
●
One trip detection diagnosis
MIL
Condition
ON
When the malfunction is detected or the ECM's CPU is malfunctioning.
OFF
No malfunction.
EC-1236
[VG33ER]
ON BOARD DIAGNOSTIC (OBD) SYSTEM
(driving pattern C) without the same malfunction recurring. The “TIME” in “SELF-DIAGNOSTIC
RESULTS” mode of CONSULT-II 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.
SUMMARY CHART
For details about patterns B and C under “Fuel Injection System” and “Misfire”, see
.
For details about patterns A and B under “Other”, see
*
1
: Clear timing is at the moment OK is detected.
*
2
: Clear timing is when the same malfunction is detected in the 2nd trip.
Items
Fuel Injection System
Misfire
Other
MIL (goes off)
3 (pattern B)
3 (pattern B)
3 (pattern B)
DTC, Freeze Frame Data (no
display)
80 (pattern C)
80 (pattern C)
40 (pattern A)
1st Trip DTC (clear)
1 (pattern C), *
1
1 (pattern C), *
1
1 (pattern B)
1st Trip Freeze Frame Data
(clear)
*
1
, *
2
*
1
, *
2
1 (pattern B)
ON BOARD DIAGNOSTIC (OBD) SYSTEM
EC-1237
[VG33ER]
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RELATIONSHIP BETWEEN MIL, DTC, 1ST TRIP DTC AND DRIVING PATTERNS FOR “MIS-
FIRE” <EXHAUST QUALITY DETERIORATION>, “FUEL INJECTION SYSTEM”
*1: When the same malfunction is
detected in two consecutive trips,
MIL will light up.
*2: MIL will go off after vehicle is driven
3 times (pattern B) without any mal-
functions.
*3: When the same malfunction is
detected in two consecutive trips, the
DTC and the freeze frame data will
be stored in ECM.
*4: 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.)
*5: 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.
*6: The 1st trip DTC and the 1st trip
freeze frame data will be cleared at
the moment OK is detected.
*7: When the same malfunction is
detected in the 2nd trip, the 1st trip
freeze frame data will be cleared.
*8: 1st trip DTC will be cleared when
vehicle is driven once (pattern C)
without the same malfunction after
DTC is stored in ECM.
SEF392S
EC-1238
[VG33ER]
ON BOARD DIAGNOSTIC (OBD) SYSTEM
EXPLANATION FOR DRIVING PATTERNS FOR “MISFIRE <EXHAUST QUALITY DETERIORA-
TION>”, “FUEL INJECTION SYSTEM”
<Driving Pattern B>
Driving pattern B means the vehicle operation as follows:
All components and systems should be monitored at least once by the OBD system.
●
The B counter will be cleared when the malfunction is detected once regardless of the driving pattern.
●
The B counter will be counted up when driving pattern B is satisfied without any malfunction.
●
The MIL will go off when the B counter reaches 3. (*2 in OBD SYSTEM OPERATION CHART)
<Driving Pattern C>
Driving pattern C means the vehicle operation as follows:
The following conditions should be satisfied at the same time:
Engine speed: (Engine speed in the freeze frame data)
±375 rpm
Calculated load value: (Calculated load value in the freeze frame data) x (1
±0.1) [%]
Engine coolant temperature (T) condition:
●
When the freeze frame data shows lower than 70
°C (158°F), T should be lower than 70°C (158°F).
●
When the freeze frame data shows higher than or equal to 70
°C (158°F), T should be higher than or equal
to 70
°C (158°F).
Example:
If the stored freeze frame data is as follows:
Engine speed: 850 rpm, Calculated load value: 30%, Engine coolant temperature: 80
°C (176°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 70
°C
(158
°F)
●
The C counter will be cleared when the malfunction is detected regardless of the vehicle conditions
described above.
●
The C counter will be counted up when the vehicle conditions described above is satisfied without the
same malfunction.
●
The DTC will not be displayed after C counter reaches 80.
●
The 1st trip DTC will be cleared when C counter is counted once without the same malfunction after DTC
is stored in ECM.
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