Infiniti M35/M45 Y50. Manual — part 590
TROUBLE DIAGNOSIS
EC-833
[VK45DE]
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EC
VEHICLE SPEED
[km/h] or [MPH]
●
The vehicle speed computed from the
vehicle speed signal sent from TCM is
displayed.
IDL A/V LEARN
[YET/CMPLT]
●
Display the condition of idle air volume
learning
YET: Idle air volume learning has not
been performed yet.
CMPLT: Idle air volume learning has
already been performed successfully.
TRVL AFTER MIL
[km] or [mile]
●
Distance traveled while MIL is activated.
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)
[%]
AC PRESS SEN
[V]
●
The signal voltage from the refrigerant
pressure sensor is displayed.
VHCL SPEED SE
[km/h] or [mph]
●
The vehicle speed computed from the
vehicle speed signal sent from combina-
tion meter 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 CAN-
CEL switch signal.
RESUME/ACC SW
[ON/OFF]
●
Indicates [ON/OFF] condition from
RESUME/ACCELERATE 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 DIS-
TANCE switch signal.
CRUISE LAMP
[ON/OFF]
●
Indicates [ON/OFF] condition of CRUISE
lamp determined by the ECM according
to the input signals.
SET LAMP
[ON/OFF]
●
Indicates [ON/OFF] condition of SET
lamp determined by the ECM according
to the input signals.
FAN DUTY
[%]
●
Indicates a command value for cooling
fan. The value is calculated by ECM
based on input signals.
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 tempera-
ture sent from “unified meter and A/C
amp.”.
Monitored item
[Unit]
ECM
INPUT
SIG-
NALS
MAIN
SIG-
NALS
Description
Remarks
EC-834
[VK45DE]
TROUBLE DIAGNOSIS
NOTE:
Any monitored item that does not match the vehicle being diagnosed is deleted from the display automatically.
DATA MONITOR (SPEC) MODE
Monitored Item
NOTE:
Any monitored item that does not match the vehicle being diagnosed is deleted from the display automatically.
ALT DUTY [%]
●
Indicates the duty ratio of the power gen-
eration command value. The ratio is cal-
culated by ECM based on the battery
current sensor signal.
BAT CUR SEN
[mV]
●
The signal voltage of battery current sen-
sor is displayed.
ALT DUTY SIG
[ON/OFF]
●
The control condition of the power gener-
ation voltage variable control (determined
by ECM according to the input signals) is
indicated.
ON: Power generation voltage variable
control is active.
OFF: Power generation voltage variable
control is inactive.
A/F ADJ-B1
●
Indicates the correction factor stored in
ECM. The factor is calculated from the
difference between the target air/fuel ratio
stored in ECM and the air-fuel ratio calcu-
lated from air fuel ratio (A/F) sensor 1 sig-
nal.
A/F ADJ-B2
Voltage [V]
●
Voltage, frequency, duty cycle or pulse
width measured by the probe.
●
Only “#” is displayed if item is unable to
be measured.
●
Figures with “#”s are temporary ones.
They are the same figures as an actual
piece of data which was just previously
measured.
Frequency [msec],
[Hz] or [%]
DUTY-HI
DUTY-LOW
PLS WIDTH-HI
PLS WIDTH-LOW
Monitored item
[Unit]
ECM
INPUT
SIG-
NALS
MAIN
SIG-
NALS
Description
Remarks
Monitored item [Unit]
ECM
input
signals
Main
signals
Description
Remarks
ENG SPEED [rpm]
×
×
●
Indicates the engine speed computed
from the signal of the crankshaft position
sensor (POS) and camshaft position
sensor (PHASE).
MAS A/F SE-B1 [V]
×
×
●
The signal voltage of the mass air flow
sensor specification is displayed.
●
When engine is running specification
range is indicated.
B/FUEL SCHDL
[msec]
×
●
“Base fuel schedule” indicates the fuel
injection pulse width programmed into
ECM, prior to any learned on board cor-
rection.
●
When engine is running specification
range is indicated.
A/F ALPHA-B1 [%]
A/F ALPHA-B2 [%]
×
●
The mean value of the air-fuel ratio feed-
back correction factor per cycle is indi-
cated.
●
When engine is running specification
range is indicated.
●
This data also includes the data for the
air-fuel ratio learning control.
TROUBLE DIAGNOSIS
EC-835
[VK45DE]
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EC
ACTIVE TEST MODE
Test Item
TEST ITEM
CONDITION
JUDGEMENT
CHECK ITEM (REMEDY)
FUEL INJEC-
TION
●
Engine: Return to the original
trouble condition
●
Change the amount of fuel injec-
tion using CONSULT-II.
If trouble symptom disappears, see
CHECK ITEM.
●
Harness and connectors
●
Fuel injector
●
Air fuel ratio (A/F) sensor 1
IGNITION TIM-
ING
●
Engine: Return to the original
trouble condition
●
Timing light: Set
●
Retard the ignition timing using
CONSULT-II.
If trouble symptom disappears, see
CHECK ITEM.
●
Perform Idle Air Volume Learning.
POWER BAL-
ANCE
●
Engine: After warming up, idle
the engine.
●
A/C switch OFF
●
Selector lever: P or N
●
Cut off each fuel injector signal
one at a time using CONSULT-II.
Engine runs rough or dies.
●
Harness and connectors
●
Compression
●
Fuel injector
●
Power transistor
●
Spark plug
●
Ignition coil
ENG COOLANT
TEMP
●
Engine: Return to the original
trouble condition
●
Change the engine coolant tem-
perature using CONSULT-II.
If trouble symptom disappears, see
CHECK ITEM.
●
Harness and connectors
●
Engine coolant temperature sen-
sor
●
Fuel injector
FUEL PUMP
RELAY
●
Ignition switch: ON (Engine
stopped)
●
Turn the fuel pump relay ON and
OFF using CONSULT-II and lis-
ten to operating sound.
Fuel pump relay makes the operat-
ing sound.
●
Harness and connectors
●
Fuel pump relay
VIAS SOL VALVE
●
Ignition switch: ON
●
Turn solenoid valve ON and OFF
with CONSULT-II and listen to
operating sound.
Solenoid valve makes an operating
sound.
●
Harness and connectors
●
Solenoid valve
PURG VOL
CONT/V
●
Engine: After warming up, run
engine at 1,500 rpm.
●
Change the EVAP canister purge
volume control solenoid valve
opening percent using CON-
SULT-II.
Engine speed changes according to
the opening percent.
●
Harness and connectors
●
Solenoid valve
FUEL/T TEMP
SEN
●
Change the fuel tank temperature using CONSULT-II.
VENT CON-
TROL/V
●
Ignition switch: ON (Engine
stopped)
●
Turn solenoid valve ON and OFF
with the CONSULT-II and listen
to operating sound.
Solenoid valve makes an operating
sound.
●
Harness and connectors
●
Solenoid valve
FPCM
●
Engine: Returns to the original
trouble condition
●
Select “LOW” and “HI” with CON-
SULT-II.
If trouble symptom disappears, see
CHECK ITEM.
●
Harness and connectors
●
FPCM
V/T ASSIGN
ANGLE
●
Engine: Return to the original
trouble condition
●
Change intake valve timing using
CONSULT-II.
If trouble symptom disappears, see
CHECK ITEM.
●
Harness and connectors
●
Intake valve timing control sole-
noid valve
EC-836
[VK45DE]
TROUBLE DIAGNOSIS
*: Leaving cooling fan OFF with CONSULT-II while engine is running may cause the engine to overheat.
DTC & SRT CONFIRMATION MODE
SRT STATUS Mode
EC-762, "SYSTEM READINESS TEST (SRT) CODE"
SRT WORK SUPPORT Mode
This mode enables a technician to drive a vehicle to set the SRT while monitoring the SRT status.
DTC WORK SUPPORT Mode
*: DTC P1442 and P1456 does not apply to Y50 models but appears in DTC Work Support Mode screens.
FAN DUTY CON-
TROL*
●
Ignition switch: ON
●
Change duty ratio using CON-
SULT-II.
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-II.
Battery voltage changes.
●
Harness and connectors
●
IPDM E/R
●
Alternator
TEST ITEM
CONDITION
JUDGEMENT
CHECK ITEM (REMEDY)
Test mode
Test item
Corresponding DTC No.
Reference page
EVAPORATIVE SYSTEM
EVP SML LEAK P0442/P1442*
P0442
P0455
EVP V/S LEAK P0456/P1456*
P0456
PURG VOL CN/V P1444
P0443
PURG FLOW P0441
P0441
A/F SEN1
A/F SEN1 (B1) P1278/P1279
P0133
A/F SEN1 (B1) P1276
P0130
A/F SEN1 (B2) P1288/P1289
P0153
A/F SEN1 (B2) P1286
P0150
HO2S2
HO2S2 (B1) P1146
P0138
HO2S2 (B1) P1147
P0137
HO2S2 (B1) P0139
P0139
HO2S2 (B2) P1166
P0158
HO2S2 (B2) P1167
P0157
HO2S2 (B2) P0159
P0159
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