Infiniti FX35 / FX45. Manual — part 484
TROUBLE DIAGNOSIS
EC-697
< SERVICE INFORMATION >
[VK45DE]
C
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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
.
*3: Always “CMPLT” is displayed.
WORK SUPPORT MODE
Work Item
ENGINE CONTROL COMPON
E
N
T P
AR
T
S
OU
T
P
U
T
Fuel injector
×
×
Power transistor (Ignition timing)
×
×
Throttle control motor relay
×
×
Throttle control motor
×
EVAP canister purge volume con-
trol solenoid valve
×
×
×
×
Air conditioner relay
×
Fuel pump relay
×
×
×
Cooling fan relay
×
×
×
Air fuel ratio 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
×
×
×
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
EC-698
< SERVICE INFORMATION >
[VK45DE]
TROUBLE DIAGNOSIS
*: 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
EC-633, "Emission-related Diagnostic Information"
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 IN USING CHARGED BATTERY.
When detecting EVAP vapor leak
point of EVAP system
VIN REGISTRATION
• IN THIS 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, it is displayed as PXXXX. (Refer to
.)
FUEL SYS-B1
• “Fuel injection system status” at the moment a malfunction is detected is displayed.
• One mode in the following 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.
TROUBLE DIAGNOSIS
EC-699
< SERVICE INFORMATION >
[VK45DE]
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 not efficient for S50 models.
FTFMCH1
Freeze frame data
item*
Description
Monitored item
Unit
Description
Remarks
ENG SPEED
rpm
• Indicates the engine speed computed from the
signal 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 running, 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 running, specification
range is indicated in “SPEC”.
A/F ALPHA-B1
%
• The mean value of the air-fuel ratio feedback
correction factor per cycle is indicated.
• When the engine is stopped, a certain
value is indicated.
• When engine is running, 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 temper-
ature sensor) is displayed.
• When the engine coolant temperature
sensor is open or short-circuited, ECM
enters fail-safe mode. The engine coolant
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]
V
• The accelerator pedal position sensor signal
voltage is displayed.
• ACCEL SENS2 signal is converted be
ECM internally. Thus, they differs from
ECM terminal voltage signal.
ACCEL SEN 2 [V]
V
TP SEN 1-B1 [V]
V
• The throttle position sensor signal voltage is dis-
played.
• THRTL SEN 2 signal is converted by
ECM internally. Thus, they differs from
ECM terminal voltage signal.
TP SEN 2-B1 [V]
V
EC-700
< SERVICE INFORMATION >
[VK45DE]
TROUBLE DIAGNOSIS
FUEL T/TMP SE
°
C or
°
F
• The fuel temperature (determined by the signal
voltage of the fuel tank temperature sensor) is
displayed.
INT/A TEMP SE
°
C or
°
F
• The intake air temperature (determined by the
signal voltage of the intake air temperature sen-
sor) is indicated.
EVAP SYS PRES
V
• The signal voltage of EVAP control system pres-
sure sensor is displayed.
FUEL LEVEL SE
V
• The signal voltage of the fuel level sensor is dis-
played.
START SIGNAL
ON/OFF
• Indicates start signal status [ON/OFF] computed
by the ECM according to the signals of engine
speed and battery voltage.
• After starting the engine, [OFF] is dis-
played regardless of the starter signal.
CLSD THL POS
ON/OFF
• Indicates idle position [ON/OFF] computed by
ECM according to the accelerator pedal position
sensor signal.
AIR COND SIG
ON/OFF
• Indicates [ON/OFF] condition of the air condi-
tioner switch as determined by the air condition-
er signal.
P/N POSI SW
ON/OFF
• Indicates [ON/OFF] condition from the park/neu-
tral position (PNP) switch signal.
PW/ST SIGNAL
ON/OFF
• [ON/OFF] condition of the power steering sys-
tem (determined by the signal voltage of the
power steering pressure sensor signal) is indi-
cated.
LOAD SIGNAL
ON/OFF
• Indicates [ON/OFF] condition from the electrical
load signal.
ON: Rear window defogger switch is ON and/or
lighting switch is in 2nd position.
OFF: Both rear window defogger switch and
lighting switch are OFF.
IGNITION SW
ON/OFF
• Indicates [ON/OFF] condition from ignition
switch signal.
HEATER FAN SW
ON/OFF
• Indicates [ON/OFF] condition from the heater
fan switch signal.
BRAKE SW
ON/OFF
• Indicates [ON/OFF] condition from the stop
lamp switch signal.
INJ PULSE-B1
msec
• Indicates the actual fuel injection pulse width
compensated by ECM according to the input
signals.
• When the engine is stopped, a certain
computed value is indicated.
INJ PULSE-B2
msec
IGN TIMING
BTDC
• Indicates the ignition timing computed by ECM
according to the input signals.
• When the engine is stopped, a certain
value is indicated.
CAL/LD VALUE [%]
%
• “Calculated load value” indicates the value of
the current air flow divided by peak air flow.
MASS AIRFLOW
g·m/s
• Indicates the mass air flow computed by ECM
according to the signal voltage of the mass air
flow sensor.
PURG VOL C/V
%
• Indicates the EVAP canister purge volume con-
trol solenoid valve control value computed by
the ECM according to the input signals.
• The opening becomes larger as the value in-
creases.
INT/V TIM (B1)
°
CA
• Indicates [
°
CA] of intake camshaft advanced an-
gle.
INT/V TIM (B2)
°
CA
Monitored item
Unit
Description
Remarks
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