Nissan Pathfinder (2009 year). Manual — part 257
EC-70
< FUNCTION DIAGNOSIS >
[VQ40DE]
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 par the following:
*1: When the same malfunction is de-
tected in two consecutive trips, MIL
will illuminate.
*2: MIL will turn off after vehicle is driven
3 times (pattern B) without any mal-
functions.
*3: When the same malfunction is de-
tected in two consecutive trips, the
DTC and the freeze frame data will be
saved 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
saved 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 de-
tected in the 2nd trip, the 1st trip
freeze frame data will be cleared.
*8: 1st trip DTC will be cleared when ve-
hicle is driven once (pattern C) with-
out the same malfunction after DTC
is saved in ECM.
JMBIA1417GB
2009 Pathfinder
ON BOARD DIAGNOSTIC (OBD) SYSTEM
EC-71
< FUNCTION DIAGNOSIS >
[VQ40DE]
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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 turn off when the B counter reaches 3. (*2 in “OBD SYSTEM OPERATION CHART”)
<Driving Pattern C>
Driving pattern C means the operating vehicle as par the following:
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 saved freeze frame data is as par the following:
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 vehicle conditions above.
• The C counter will be counted up when vehicle conditions above are 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
saved in ECM.
RELATIONSHIP BETWEEN MIL, DTC, 1ST TRIP DTC AND DRIVING PATTERNS EXCEPT FOR
“MISFIRE <EXHAUST QUALITY DETERIORATION>”, “FUEL INJECTION SYSTEM”
2009 Pathfinder
EC-72
< FUNCTION DIAGNOSIS >
[VQ40DE]
ON BOARD DIAGNOSTIC (OBD) SYSTEM
EXPLANATION FOR DRIVING PATTERNS EXCEPT FOR “MISFIRE <EXHAUST QUALITY DETE-
RIORATION>”, “FUEL INJECTION SYSTEM”
*1: When the same malfunction is de-
tected in two consecutive trips, MIL
will illuminate.
*2: MIL will turn off after vehicle is driven
3 times (pattern B) without any mal-
functions.
*3: When the same malfunction is de-
tected in two consecutive trips, the
DTC and the freeze frame data will be
saved in ECM.
*4: 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.)
*5: When a malfunction is detected for
the first time, the 1st trip DTC and the
1st trip freeze frame data will be
saved in ECM.
*6: 1st trip DTC will be cleared after vehi-
cle is driven once (pattern B) without
the same malfunction.
*7: When the same malfunction is de-
tected in the 2nd trip, the 1st trip
freeze frame data will be cleared.
JMBIA1418GB
2009 Pathfinder
ON BOARD DIAGNOSTIC (OBD) SYSTEM
EC-73
< FUNCTION DIAGNOSIS >
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<Driving Pattern A>
• The A counter will be cleared when the malfunction is detected regardless of (1) - (4).
• The A counter will be counted up when (1) - (4) are satisfied without the same malfunction.
• The DTC will not be displayed after the A counter reaches 40.
<Driving Pattern B>
Driving pattern B means operating vehicle as per the following:
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 malfunctions.
• The MIL will turn off when the B counter reaches 3 (*2 in OBD SYSTEM OPERATION CHART).
CONSULT-III Function (ENGINE)
INFOID:0000000004297261
FUNCTION
*: The following emission-related diagnostic information is cleared when the ECM memory is erased.
• Diagnostic trouble codes
• 1st trip diagnostic trouble codes
• Freeze frame data
• 1st trip freeze frame data
• System readiness test (SRT) codes
• Test values
ENGINE CONTROL COMPONENT PARTS/CONTROL SYSTEMS APPLICATION
JMBIA1920GB
Diagnostic test mode
Function
Work support
This mode enables a technician to adjust some devices faster and more accurately by following the in-
dications on the CONSULT-III unit.
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.
Active test
Diagnostic Test Mode in which CONSULT-III drives some actuators apart from the ECMs and also shifts
some parameters in a specified range.
Function test
This mode is used to inform customers when the vehicle requires periodic maintenance.
DTC & SRT confirmation
The status of system monitoring tests and the self-diagnosis status/results can be confirmed.
ECU part number
ECM part number can be read.
2009 Pathfinder
EC-74
< FUNCTION DIAGNOSIS >
[VQ40DE]
ON BOARD DIAGNOSTIC (OBD) SYSTEM
Item
DIAGNOSTIC TEST MODE
WORK
SUPPORT
SELF-DIAGNOSTIC
RESULTS
DATA
MONI-
TOR
ACTIVE
TEST
DTC & SRT
CONFIRMATION
DTC*1
FREEZE
FRAME
DATA*2
SRT STA-
TUS
DTC
WORK
SUP-
PORT
E
N
GIN
E
CON
T
RO
L COMPONENT
P
ARTS
INPUT
Crankshaft position sensor (POS)
×
×
×
Camshaft position sensor (PHASE)
×
×
×
Mass air flow sensor
×
×
Engine coolant temperature sensor
×
×
×
×
Air fuel ratio (A/F) sensor 1
×
×
×
×
Heated oxygen sensor 2
×
×
×
×
Wheel sensor
×
×
×
Accelerator pedal position sensor
×
×
Throttle position sensor
×
×
×
Fuel tank temperature sensor
×
×
×
EVAP control system pressure sensor
×
×
Intake air temperature sensor
×
×
×
Knock sensor
×
Refrigerant pressure sensor
×
Closed throttle position switch (accel-
erator pedal position sensor signal)
×
Air conditioner switch
×
Park/neutral position (PNP) switch
×
×
Stop lamp switch
×
×
Power steering pressure sensor
×
×
Battery voltage
×
Load signal
×
Fuel level sensor
×
×
Battery current sensor
×
×
ASCD steering switch
×
×
ASCD brake switch
×
×
2009 Pathfinder
ON BOARD DIAGNOSTIC (OBD) SYSTEM
EC-75
< FUNCTION DIAGNOSIS >
[VQ40DE]
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X: Applicable
*1: This item includes 1st trip DTCs.
*2: This mode includes 1st trip freeze frame data or freeze frame data. The items appear on CONSULT-III screen in freeze frame data
mode only if a 1st trip DTC or DTC is detected. For details, refer to "Freeze Frame Data and 1st Trip Freeze Frame Data".
*3: Always “CMPLT” is displayed.
WORK SUPPORT MODE
Work Item
ENGINE CONTROL COMPON
E
N
T P
A
R
T
S
OU
T
P
U
T
Fuel injector
×
×
Power transistor (Ignition timing)
×
×
Throttle control motor relay
×
×
Throttle control motor
×
EVAP canister purge volume control
solenoid valve
×
×
×
×
Air conditioner relay
×
Fuel pump relay
×
×
×
Cooling fan relay
×
×
×
Air fuel ratio (A/F) sensor 1 heater
×
×
×
*
3
Heated oxygen sensor 2 heater
×
×
×
*
3
EVAP canister vent control valve
×
×
×
×
Intake valve timing control solenoid
valve
×
×
×
VIAS control solenoid valve
×
×
×
Alternator
×
×
Calculated load value
×
×
Item
DIAGNOSTIC TEST MODE
WORK
SUPPORT
SELF-DIAGNOSTIC
RESULTS
DATA
MONI-
TOR
ACTIVE
TEST
DTC & SRT
CONFIRMATION
DTC*1
FREEZE
FRAME
DATA*2
SRT STA-
TUS
DTC
WORK
SUP-
PORT
WORK ITEM
CONDITION
USAGE
FUEL PRESSURE RELEASE
• FUEL PUMP WILL STOP BY TOUCHING “START” DUR-
ING IDLING.
CRANK A FEW TIMES AFTER ENGINE STALLS.
When releasing fuel pressure from
fuel line
IDLE AIR VOL LEARN
• THE IDLE AIR VOLUME THAT KEEPS THE ENGINE
WITHIN THE SPECIFIED RANGE IS MEMORIZED IN
ECM.
When learning the idle air volume
SELF-LEARNING CONT
• THE COEFFICIENT OF SELF-LEARNING CONTROL
MIXTURE RATIO RETURNS TO THE ORIGINAL COEF-
FICIENT.
When clearing the coefficient of
self-learning control value
2009 Pathfinder
EC-76
< FUNCTION DIAGNOSIS >
[VQ40DE]
ON BOARD DIAGNOSTIC (OBD) SYSTEM
*: This function is not necessary in the usual service procedure.
SELF-DIAG RESULTS MODE
Self Diagnostic Item
Regarding items of DTC and 1st trip DTC, refer to
.
Freeze Frame Data and 1st Trip Freeze Frame Data
EVAP SYSTEM CLOSE
CLOSE THE EVAP CANISTER VENT CONTROL VALVE IN
ORDER TO MAKE EVAP SYSTEM CLOSE UNDER THE
FOLLOWING CONDITIONS.
• IGN SW ON
• ENGINE NOT RUNNING
• AMBIENT TEMPERATURE IS ABOVE 0
°
C (32
°
F).
• NO VACUUM AND NO HIGH PRESSURE IN EVAP SYS-
TEM
• FUEL TANK TEMP. IS MORE THAN 0
°
C (32
°
F).
• WITHIN 10 MINUTES AFTER STARTING “EVAP SYS-
TEM CLOSE”
• WHEN TRYING TO EXECUTE “EVAP SYSTEM CLOSE”
UNDER THE CONDITION EXCEPT ABOVE, CONSULT-
III WILL DISCONTINUE IT AND DISPLAY APPROPRI-
ATE INSTRUCTION.
NOTE:
WHEN STARTING ENGINE, CONSULT-III MAY DIS-
PLAY “BATTERY VOLTAGE IS LOW. CHARGE BAT-
TERY”, EVEN WHEN USING A CHARGED BATTERY.
When detecting EVAP vapor leak
in the EVAP system
VIN REGISTRATION
• IN THE MODE, VIN IS REGISTERED IN ECM.
When registering VIN in ECM
TARGET IDLE RPM ADJ*
• IDLE CONDITION
When setting target idle speed
TARGET IGN TIM ADJ*
• IDLE CONDITION
When adjusting target ignition tim-
ing
WORK ITEM
CONDITION
USAGE
Freeze frame data
item*
Description
DIAG TROUBLE
CODE
[PXXXX]
• The engine control component part/control system has a trouble code, that is displayed as PXXXX. (Refer
to
.)
FUEL SYS-B1
• “Fuel injection system status” at the moment a malfunction is detected is displayed.
• One of in the following made is displayed.
Mode2: Open loop due to detected system malfunction
Mode3: Open loop due to driving conditions (power enrichment, deceleration enleanment)
Mode4: Closed loop - using oxygen sensor(s) as feedback for fuel control
Mode5: Open loop - has not yet satisfied condition to go to closed loop
FUEL SYS-B2
CAL/LD VALUE [%]
• The calculated load value at the moment a malfunction is detected is displayed.
COOLANT TEMP [
°
C]
or [
°
F]
• The engine coolant temperature at the moment a malfunction is detected is displayed.
L-FUEL TRM-B1 [%]
• “Long-term fuel trim” at the moment a malfunction is detected is displayed.
• The long-term fuel trim indicates much more gradual feedback compensation to the base fuel schedule than
short-term fuel trim.
L-FUEL TRM-B2 [%]
S-FUEL TRM-B1 [%]
• “Short-term fuel trim” at the moment a malfunction is detected is displayed.
• The short-term fuel trim indicates dynamic or instantaneous feedback compensation to the base fuel sched-
ule.
S-FUEL TRM-B2 [%]
ENGINE SPEED [rpm]
• The engine speed at the moment a malfunction is detected is displayed.
VEHICL SPEED [km/
h] or [mph]
• The vehicle speed at the moment a malfunction is detected is displayed.
ABSOL TH-P/S [%]
• The throttle valve opening angle at the moment a malfunction is detected is displayed.
B/FUEL SCHDL
[msec]
• The base fuel schedule at the moment a malfunction is detected is displayed.
2009 Pathfinder
ON BOARD DIAGNOSTIC (OBD) SYSTEM
EC-77
< FUNCTION DIAGNOSIS >
[VQ40DE]
C
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*: The items are the same as those of 1st trip freeze frame data.
DATA MONITOR MODE
Monitored Item
×
: Applicable
INT/A TEMP SE [
°
C]
or [
°
F]
• The intake air temperature at the moment a malfunction is detected is displayed.
INT MANI PRES [kPa]
• Always a certain value is displayed.
• These items are displayed but are not applicable to this model.
COMBUST CONDI-
TION
Freeze frame data
item*
Description
Monitored item
Unit
Description
Remarks
ENG SPEED
rpm
• Indicates the engine speed computed from the sig-
nal of the crankshaft position sensor (POS) and
camshaft position sensor (PHASE).
• Accuracy becomes poor if engine speed
drops below the idle rpm.
• If the signal is interrupted while the en-
gine is running, an abnormal value may
be indicated.
MAS A/F SE-B1
V
• The signal voltage of the mass air flow sensor is
displayed.
• When the engine is stopped, a certain
value is indicated.
• When engine is runnning specification
range is indicated in “SPEC”.
B/FUEL SCHDL
msec
• “Base fuel schedule” indicates the fuel injection
pulse width programmed into ECM, prior to any
learned on board correction.
• When engine is runnning specification
range is indicated in “SPEC”.
A/F ALPHA-B1
%
• The mean value of the air-fuel ratio feedback cor-
rection factor per cycle is indicated.
• When the engine is stopped, a certain
value is indicated.
• When engine is runnning specification
range is indicated in “SPEC”.
• This data also includes the data for the
air-fuel ratio learning control.
A/F ALPHA-B2
%
COOLAN TEMP/S
°
C or
°
F
• The engine coolant temperature (determined by
the signal voltage of the engine coolant tempera-
ture sensor) is displayed.
• When the engine coolant temperature
sensor is open or short-circuited, ECM
enters fail-safe mode. The engine cool-
ant temperature determined by the ECM
is displayed.
A/F SEN1 (B1)
V
• The A/F signal computed from the input signal of
the Air fuel ratio (A/F) sensor 1 is displayed.
A/F SEN1 (B2)
V
HO2S2 (B1)
V
• The signal voltage of the heated oxygen sensor 2
is displayed.
HO2S2 (B2)
V
HO2S2 MNTR (B1)
RICH/
LEAN
• Display of heated oxygen sensor 2 signal:
RICH: Means the amount of oxygen after three way
catalyst is relatively small.
LEAN: Means the amount of oxygen after three
way catalyst is relatively large.
• When the engine is stopped, a certain
value is indicated.
HO2S2 MNTR (B2)
RICH/
LEAN
VHCL SPEED SE
km/h or
mph
• The vehicle speed computed from the vehicle
speed signal sent from combination meter is dis-
played.
BATTERY VOLT
V
• The power supply voltage of ECM is displayed.
ACCEL SEN 1
V
• The accelerator pedal position sensor signal volt-
age is displayed.
• ACCEL SEN 2 signal is converted by
ECM internally. Thus, it differs from ECM
terminal voltage signal.
ACCEL SEN 2
V
TP SEN 1-B1
V
• The throttle position sensor signal voltage is dis-
played.
• THRTL SEN 2 signal is converted by
ECM internally. Thus, it differs from ECM
terminal voltage signal.
TP SEN 2-B1
V
2009 Pathfinder
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