Infiniti M45 (Y34). Manual — part 356
TROUBLE DIAGNOSIS
EC-113
C
D
E
F
G
H
I
J
K
L
M
A
EC
*: The items are the same as those of 1st trip freeze frame data.
DATA MONITOR MODE
Monitored Item
×
: Applicable
B/FUEL SCHDL
[msec]
●
The base fuel schedule at the moment a malfunction is detected is displayed.
INT/A TEMP SE [
°
C]
or [
°
F]
●
The intake air temperature at the moment a malfunction is detected is displayed.
Freeze frame data
item*
Description
Monitored item
[Unit]
ECM
INPUT
SIG-
NALS
MAIN
SIG-
NALS
Description
Remarks
ENG SPEED
[rpm]
×
×
●
Indicates the engine speed computed
from the signals of the crankshaft posi-
tion sensor (POS) and camshaft posi-
tion sensor (PHASE).
●
Accuracy becomes poor if engine
speed drops below the idle rpm.
●
If the signal is interrupted while the
engine 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.
COOLAN TEMP/S
[
°
C] or [
°
F]
×
×
●
The engine coolant temperature (deter-
mined by the signal voltage of the
engine coolant temperature sensor) is
displayed.
●
When the engine coolant tempera-
ture sensor is open or short-cir-
cuited, ECM enters fail-safe mode.
The engine coolant temperature
determined by the ECM is dis-
played.
HO2S1 (B1) [V]
×
×
●
The signal voltage of the heated oxygen
sensor 1 is displayed.
HO2S1 (B2) [V]
×
HO2S2 (B1) [V]
×
●
The signal voltage of the heated oxygen
sensor 2 is displayed.
HO2S2 (B2) [V]
×
HO2S1 MNTR (B1)
[RICH/LEAN]
×
×
●
Display of heated oxygen sensor 1 sig-
nal during air-fuel ratio feedback control:
RICH: Means the mixture became rich,
and control is being affected toward a
leaner mixture.
LEAN: Means the mixture became lean,
and control is being affected toward a
rich mixture.
●
After turning ON the ignition
switch, “RICH” is displayed until
air-fuel mixture ratio feedback
control begins.
●
When the air-fuel ratio feedback is
clamped, the value just before the
clamping is displayed continu-
ously.
HO2S1 MNTR (B2)
[RICH/LEAN]
×
HO2S2 MNTR (B1)
[RICH/LEAN]
×
●
Display of heated oxygen sensor 2 sig-
nal:
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 is displayed.
BATTERY VOLT
[V]
×
×
●
The power supply voltage of ECM is dis-
played.
ACCEL SEN 1 [V]
×
×
●
The accelerator pedal position sensor
signal voltage is displayed.
●
ACCEL SEN 2 signal is converted
by ECM internally. Thus, it differs
from ECM terminal voltage signal.
ACCEL SEN 2 [V]
×
EC-114
TROUBLE DIAGNOSIS
THRTL SEN 1 [V]
×
×
●
The throttle position sensor signal volt-
age is displayed.
●
THRTL SEN 2 signal is converted
by ECM internally. Thus, it differs
from ECM terminal voltage signal.
THRTL SEN 2 [V]
×
FUEL T/TEMP SE
[
°
C] or [
°
F]
×
●
The fuel temperature (determined by the
signal voltage of the fuel tank tempera-
ture sensor) is displayed.
INT/A TEMP SE
[
°
C] or [
°
F]
×
×
●
The intake air temperature (determined
by the signal voltage of the intake air
temperature sensor) is indicated.
EVAP SYS PRES
[V]
×
●
The signal voltage of EVAP control sys-
tem pressure sensor is displayed.
FUEL LEVEL SE
[V]
×
●
The signal voltage of the fuel level sen-
sor is displayed.
START SIGNAL
[ON/OFF]
×
×
●
Indicates [ON/OFF] condition from the
starter signal.
●
After starting the engine, [OFF] is
displayed regardless of the starter
signal.
CLSD THL POS
[ON/OFF]
×
×
●
Indicates idle position [ON/OFF] com-
puted by ECM according to the acceler-
ator pedal position sensor signal.
AIR COND SIG
[ON/OFF]
×
×
●
Indicates [ON/OFF] condition of the air
conditioner switch determined by the air
conditioner signal.
P/N POSI SW
[ON/OFF]
×
×
●
Indicates [ON/OFF] condition from the
park/neutral position (PNP) switch sig-
nal.
PW/ST SIGNAL
[ON/OFF]
×
×
●
[ON/OFF] condition of the power steer-
ing system (determined by the signal
voltage of the power steering pressure
sensor signal) is indicated.
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 igni-
tion switch.
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 indi-
cated.
INJ PULSE-B2
[msec]
B/FUEL SCHDL
[msec]
●
“Base fuel schedule” indicates the fuel
injection pulse width programmed into
ECM, prior to any learned on board cor-
rection.
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.
Monitored item
[Unit]
ECM
INPUT
SIG-
NALS
MAIN
SIG-
NALS
Description
Remarks
TROUBLE DIAGNOSIS
EC-115
C
D
E
F
G
H
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J
K
L
M
A
EC
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.
●
This data also includes the data
for the air-fuel ratio learning con-
trol.
A/F ALPHA-B2
[%]
×
CAL/LD VALUE
[%]
●
“Calculated load value” indicates the
value of the current airflow divided by
peak airflow.
MASS AIRFLOW
[g·m/s]
●
Indicates the mass airflow computed by
ECM according to the signal voltage of
the mass air flow sensor.
PURG VOL C/V
[%]
●
Indicates the EVAP canister purge vol-
ume control solenoid valve control value
computed by the ECM according to the
input signals.
●
The opening becomes larger as the
value increases.
INT/V TIM (B1)
[
°
CA]
●
Indicates [
°
CA] of intake camshaft
advanced angle.
INT/V TIM (B2)
[
°
CA]
INT/V SOL (B1) [%]
●
The control value of the intake valve tim-
ing control solenoid valve (determined
by ECM according to the input signal) is
indicated.
●
The advance angle becomes larger as
the value increases.
INT/V SOL (B2)
[%]
VIAS S/V
[ON/OFF]
●
The control condition of the VIAS control
solenoid valve (determined by ECM
according to the input signals) is indi-
cated.
●
OFF: VIAS control solenoid valve is not
operating.
ON: VIAS control solenoid valve is oper-
ating.
AIR COND RLY
[ON/OFF]
×
●
The air conditioner relay control condi-
tion (determined by ECM according to
the input signals) is indicated.
FUEL PUMP RLY
[ON/OFF]
×
●
Indicates the fuel pump relay control
condition determined by ECM according
to the input signals.
FPCM
[HI/LOW]
×
●
The control condition of the fuel pump
control module (FPCM) (determined by
the ECM according to the input signals)
is indicated.
VC/V BYPASS/V
[ON/OFF]
●
The control condition of the vacuum cut
valve bypass valve (determined by ECM
according to the input signals) is indi-
cated.
●
ON: Open
OFF: Closed
Monitored item
[Unit]
ECM
INPUT
SIG-
NALS
MAIN
SIG-
NALS
Description
Remarks
EC-116
TROUBLE DIAGNOSIS
NOTE:
Any monitored item that does not match the vehicle being diagnosed is deleted from the display automatically.
VENT CONT/V
[ON/OFF]
●
The control condition of the EVAP canis-
ter 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.
HO2S1 HTR (B1)
[ON/OFF]
●
Indicates [ON/OFF] condition of heated
oxygen sensor 1 heater determined by
ECM according to the input signals.
HO2S1 HTR (B2)
[ON/OFF]
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)
[ON/OFF]
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.
O2SEN HTR DTY
[%]
●
Indicates the heated oxygen sensor 1
heater control value computed by the
ECM according to the input signals.
TRGT FAN RPM
[rpm]
●
The target speed of cooling fan opera-
tion (determined by the ECM according
to the input signals) is displayed.
RADIATOR TEMP
[
°
C] or [
°
F]
●
The radiator coolant temperature (deter-
mined by the signal of the radiator cool-
ant temperature sensor) is displayed.
AC PRESS SEN
[V]
●
The signal voltage from the refrigerant
pressure sensor is displayed.
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
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