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EC-110
[QR (WITH EURO-OBD)]
TROUBLE DIAGNOSIS
DATA MONITOR MODE
Monitored Item
×: Applicable
Monitored item
[Unit]
ECM
INPUT
SIGNALS
MAIN
SIG-
NALS
Description Remarks
ENG SPEED [rpm] ××
● Indicates the engine speed computed from the
signals 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 engine is running, an abnor-
mal 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.
B/FUEL SCHDL
[msec]
×
● “Base fuel schedule” indicates the fuel injec-
tion pulse width programmed into ECM, prior
to any learned on board correction.
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.
COOLAN TEMP/S
[°C] or [°F]
××
● The engine coolant temperature (determined
by the signal voltage of the engine coolant
temperature sensor) is displayed.
● When the engine coolant temper-
ature sensor is open or short-cir-
cuited, ECM enters fail-safe
mode. The engine coolant tem-
perature determined by the ECM
is displayed.
HO2S1 (B1) [V] ××
● The signal voltage of the heated oxygen sen-
sor 1 is displayed.
HO2S2 (B1) [V] ×
● The signal voltage of the heated oxygen sen-
sor 2 is displayed.
HO2S1 MNTR (B1)
[RICH/LEAN]
××
● Display of heated oxygen sensor 1 signal dur-
ing air-fuel ratio feedback control:
RICH: means the mixture became “rich”, and
control is being affected toward a leaner mix-
ture.
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 contin-
uously.
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.
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 con-
verted by ECM internally. Thus, it
differs from ECM terminal voltage
signal.
ACCEL SEN 2 [V] ×
THRTL SEN 1 [V] ××
● The throttle position sensor signal voltage is
displayed.
● THRTL SEN 2 signal is con-
verted by ECM internally. Thus, it
differs from ECM terminal voltage
signal.
THRTL SEN 2 [V] ×
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