Infiniti FX35, FX50 (S51). Manual — part 795
ON BOARD DIAGNOSTIC (OBD) SYSTEM
EC-721
< SYSTEM DESCRIPTION >
[VK50VE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
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 sig-
nals.
• When the engine is stopped, a certain
computed value is indicated.
INJ PULSE-B2
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 ac-
cording 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.
EXH/V TIM B1
°
CA
• Indicates [
°
CA] of exhaust camshaft retard angle.
EXH/V TIM B2
INT/V SOL (B1)
%
• The control value of the intake valve timing con-
trol solenoid valve (determined by ECM accord-
ing to the input signals) is indicated.
• The advance angle becomes larger as the value
increases.
INT/V SOL (B2)
AIR COND RLY
ON/OFF
• The air conditioner relay control condition (deter-
mined by ECM according to the input signals) is
indicated.
VENT CONT/V
ON/OFF
• The control condition of the EVAP canister vent
control valve (determined by ECM according to
the input signals) is indicated.
ON: Closed
OFF: Open
THRTL RELAY
ON/OFF
• Indicates the throttle control motor relay control
condition determined by the ECM according to
the input signals.
A/F S1 HTR (B1)
%
• Air fuel ratio (A/F) sensor 1 heater control value
computed by ECM according to the input signals.
• The current flow to the heater becomes larger as
the value increases.
A/F S1 HTR (B2)
HO2S2 HTR (B1)
ON/OFF
• Indicates [ON/OFF] condition of heated oxygen
sensor 2 heater determined by ECM according to
the input signals.
HO2S2 HTR (B2)
ALT DUTY SIG
ON/OFF
• The control condition of the power generation
voltage variable control (determined by ECM ac-
cording to the input signals) is indicated.
ON: Power generation voltage variable control is
active.
OFF: Power generation voltage variable control
is inactive.
I/P PULLY SPD
rpm
• Indicates the engine speed computed from the in-
put speed sensor signal.
VEHICLE SPEED
km/h or mph
• The vehicle speed computed from the vehicle
speed signal sent from TCM is displayed.
Monitored item
Unit
Description
Remarks
EC-722
< SYSTEM DESCRIPTION >
[VK50VE]
ON BOARD DIAGNOSTIC (OBD) SYSTEM
IDL A/V LEARN
YET/CMPLT
• Displays the condition of Idle Air Volume Learn-
ing
YET: Idle air volume learning has not been per-
formed yet.
CMPLT: Idle air volume learning has already
been performed successfully.
TRVL AFTER MIL
km or mile
• Distance traveled while MIL is activated.
SNOW MODE SW
ON/OFF
• Indicates [ON/OFF] condition from the snow
mode switch signal.
ENG OIL TEMP
°
C or
°
F
• The engine oil temperature (determined by the
signal voltage of the engine oil temperature sen-
sor) is displayed.
VHCL SPEED SE
km/h or mph
• The vehicle speed computed from the vehicle
speed signal sent from unified meter and A/C
amp. is displayed.
SET VHCL SPD
km/h or mph
• The preset vehicle speed is displayed.
MAIN SW
ON/OFF
• Indicates [ON/OFF] condition from MAIN switch
signal.
CANCEL SW
ON/OFF
• Indicates [ON/OFF] condition from CANCEL
switch signal.
RESUME/ACC SW
ON/OFF
• Indicates [ON/OFF] condition from RESUME/AC-
CELERATE switch signal.
SET SW
ON/OFF
• Indicates [ON/OFF] condition from SET/COAST
switch signal.
BRAKE SW1
ON/OFF
• Indicates [ON/OFF] condition from ASCD brake
switch signal.
BRAKE SW2
ON/OFF
• Indicates [ON/OFF] condition of stop lamp switch
signal.
DIST SW
ON/OFF
• Indicates [ON/OFF] condition from DISTANCE
switch signal.
VHCL SPD CUT
NON/CUT
• Indicates the vehicle cruise condition.
NON: Vehicle speed is maintained at the ASCD
set speed.
CUT: Vehicle speed decreased to excessively
low compared with the ASCD set speed, and
ASCD operation is cut off.
LO SPEED CUT
NON/CUT
• Indicates the vehicle cruise condition.
NON: Vehicle speed is maintained at the ASCD
set speed.
CUT: Vehicle speed decreased to excessively
low, and ASCD operation is cut off.
AT OD MONITOR
ON/OFF
• Indicates [ON/OFF] condition of A/T O/D accord-
ing to the input signal from the TCM.
AT OD CANCEL
ON/OFF
• Indicates [ON/OFF] condition of A/T O/D cancel
request signal.
CRUISE LAMP
ON/OFF
• Indicates [ON/OFF] condition of CRUISE indica-
tor determined by the ECM according to the input
signals.
SET LAMP
ON/OFF
• Indicates [ON/OFF] condition of SET indicator
determined by the ECM according to the input
signals.
Monitored item
Unit
Description
Remarks
ON BOARD DIAGNOSTIC (OBD) SYSTEM
EC-723
< SYSTEM DESCRIPTION >
[VK50VE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
EXH V/T LEARN
YET/CMPLT
• Display the condition of Exhaust Valve Timing
Control Learning
YET: Exhaust Valve Timing Control Learning has
not been performed yet.
CMPLT: Exhaust Valve Timing Control Learning
has already been performed successfully.
FAN DUTY
%
• Indicates a command value for cooling fan. The
value is calculated by ECM based on input sig-
nals.
AC EVA TEMP
°
C or
°
F
• Indicates A/C evaporator temperature sent from
“unified meter and A/C amp.”.
AC EVA TARGET
°
C or
°
F
• Indicates target A/C evaporator temperature sent
from “unified meter and A/C amp.”.
ALT DUTY
%
• Indicates the duty ratio of the power generation
command value. The ratio is calculated by ECM
based on the battery current sensor signal.
BAT CUR SEN
mV
• The signal voltage of battery current sensor is
displayed.
A/F ADJ-B1
—
• Indicates the correction of a factor stored in ECM.
The factor is calculated from the difference be-
tween the target air-fuel ratio stored in ECM and
the air-fuel ratio calculated from A/F sensor 1 sig-
nal.
A/F ADJ-B2
TP SEN 1-B2
V
• The throttle position sensor signal voltage is dis-
played.
• TP SEN 2-B2 signal is converted by
ECM internally. Thus, they differs
from ECM terminal voltage signal.
TP SEN 2-B2
P/N POSI SW
ON/OFF
• Indicates [ON/OFF] condition from the park/neu-
tral position (PNP) signal.
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.
AC PRESS SEN
V
• The signal voltage from the refrigerant pressure
sensor is displayed.
VTC DTY EX B1
%
• The control value of the exhaust valve timing con-
trol magnet retarder (determined by ECM accord-
ing to the input signals) is indicated.
• The retard angle becomes larger as the value in-
creases.
VTC DTY EX B2
INT/V TIM (B1)
°
CA
• Indicates [
°
CA] of intake camshaft advance an-
gle.
INT/V TIM (B2)
VVEL LEARN
YET/DONE
• Display the condition of VVEL learning
YET: VVEL learning has not been performed yet.
DONE: VVEL learning has already been per-
formed successfully.
VVEL SEN LEARN-
B1
V
• Indicates the VVEL learning value.
VVEL SEN LEARN-
B2
VVEL POSITION
SEN-B1
V
• The VVEL control shaft position sensor signal
voltage is displayed.
VVEL POSITION
SEN-B2
Monitored item
Unit
Description
Remarks
EC-724
< SYSTEM DESCRIPTION >
[VK50VE]
ON BOARD DIAGNOSTIC (OBD) SYSTEM
NOTE:
Any monitored item that does not match the vehicle being diagnosed is deleted from the display automatically.
ACTIVE TEST MODE
Test Item
VVEL TIM-B1
deg
• Indicates [deg] of VVEL control shaft angle.
VVEL TIM-B2
FPCM
HI/MID/LOW/
OFF
• The control condition of the fuel pump control
module (FPCM) (determined by ECM according
to the input signals) is indicated.
Monitored item
Unit
Description
Remarks
TEST ITEM
CONDITION
JUDGMENT
CHECK ITEM (REMEDY)
VENT CON-
TROL/V
• Ignition switch: ON (Engine
stopped)
• Turn solenoid valve ON and OFF
with the CONSULT-III and listen
to operating sound.
Solenoid valve makes an operating
sound.
• Harness and connectors
• Solenoid valve
ENG COOLANT
TEMP
• Engine: Return to the original
non-standard condition
• Change the engine coolant tem-
perature using CONSULT-III.
If malfunctioning symptom disap-
pears, see CHECK ITEM.
• Harness and connectors
• Engine coolant temperature sen-
sor
• Fuel injector
FUEL INJEC-
TION
• Engine: Return to the original
non-standard condition
• Change the amount of fuel injec-
tion using CONSULT-III.
If malfunctioning symptom disap-
pears, see CHECK ITEM.
• Harness and connectors
• Fuel injector
• Air fuel ratio (A/F) sensor 1
FUEL/T TEMP
SEN
• Change the fuel tank temperature using CONSULT-III.
PURG VOL
CONT/V
• Engine: After warming up, run en-
gine at 1,500 rpm.
• Change the EVAP canister purge
volume control solenoid valve
opening percent using CON-
SULT-III.
Engine speed changes according to
the opening percent.
• Harness and connectors
• Solenoid valve
FAN DUTY CON-
TROL*
• Ignition switch: ON
• Change duty ratio using CON-
SULT-III.
Cooling fan speed changes.
• Harness and connectors
• Cooling fan motor
• Cooling fan relay
• Cooling fan control module
• IPDM E/R
ALTERNATOR
DUTY
• Engine: Idle
• Change duty ratio using CON-
SULT-III.
Battery voltage changes.
• Harness and connectors
• IPDM E/R
• Alternator
EXH V/T ASSIGN
ANGLE
• Engine: Return to the original
non-standard condition
• Change exhaust valve timing us-
ing CONSULT-III.
If malfunctioning symptom disap-
pears, see CHECK ITEM.
• Harness and connectors
• Exhaust valve timing control mag-
net retarder
POWER BAL-
ANCE
• Engine: After warming up, idle the
engine.
• A/C switch OFF
• Selector lever: P or N
• Cut off each injector signal one at
a time using CONSULT-III.
Engine runs rough or stops.
• Harness and connectors
• Compression
• Fuel injector
• Power transistor
• Spark plug
• Ignition coil
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