Nissan Note [105/1872] Ec 105

Nissan Note [105/1872] Ec 105
TROUBLE DIAGNOSIS
EC-105
[CR (WITH EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
M
A
EC
DATA MONITOR MODE
Monitored Item
×: Applicable
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 position sen-
sor (POS) and camshaft position 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.
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-circuited,
ECM enters fail-safe mode. The
engine coolant temperature deter-
mined by the ECM is displayed.
HO2S1 (B1) [V] ××
The signal voltage of the heated oxygen
sensor 1 is displayed.
HO2S2 (B1) [V] ×
The signal voltage of the heated oxygen
sensor 2 is displayed.
HO2S1 MNTR (B1)
[RICH/LEAN]
××
Display of heated oxygen sensor 1 signal
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 mix-
ture ratio feedback control begins.
When the air-fuel ratio feedback is
clamped, the value just before the
clamping is displayed continuously.
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 cer-
tain value is indicated.
A/F ALPHA-B1 [%] ×
The mean value of the air-fuel ratio feed-
back correction factor per cycle is indicated.
When the engine is stopped, a cer-
tain value is indicated.
This data also includes the data for
the air-fuel ratio learning control.
VHCL SPEED SE
[km/h] or [mph]
××
The vehicle speed computed from the vehi-
cle speed signal is displayed.
BATTERY VOLT [V] ××
The power supply voltage of ECM is dis-
played.
B/FUEL SCHDL
[msec]
×
“Base fuel schedule” indicates the fuel
injection pulse width programmed into
ECM, prior to any learned on board correc-
tion.
ACCEL SEN 1 [V] ××
The accelerator pedal position sensor sig-
nal voltage is displayed.
ACCEL SEN 2 signal is converted by
ECM internally. Thus, it differs from
ECM terminal voltage signal.
ACCEL SEN 2 [V] ×
THRTL SEN 1 [V] ××
Thethrottlepositionsensorsignalvoltage
is displayed.
THRTL SEN 2 signal is converted by
ECM internally. Thus, it differs from
ECM terminal voltage signal.
THRTL SEN 2 [V] ×
INT/ATEMPSE[°C]
or [°F]
××
The intake air temperature (determined by
the signal voltage of the intake air tempera-
ture sensor) is indicated.
TURBO BST SEN
[V]
×
The signal voltage of the manifold absolute
pressure sensor is displayed.

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