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TROUBLE DIAGNOSIS
EC-557
[QR (WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
M
A
EC
NOTE:
Any monitored item that does not match the vehicle being diagnosed is deleted from the display automatically.
DATA MONITOR (SPEC) MODE
Monitored Item
FUEL PUMP RLY
[ON/OFF]
×
● Indicates the fuel pump relay control condition
determined by ECM according to the input sig-
nals.
THRTL RELAY
[ON/OFF]
×
● Indicates the throttle control motor relay control
condition determined by the ECM according to
the input signals.
COOLING FAN
[HI/LOW/OFF]
● Indicates the condition of the cooling fan (deter-
mined by ECM according to the input signals).
HI ... High speed operation
LOW: Low speed operation
OFF: Stop
HO2S1 HTR (B1)
[ON/OFF]
● Indicates [ON/OFF] condition of heated oxygen
sensor 1 heater determined by ECM according
to the input signals.
HO2S2 HTR (B1)
[ON/OFF]
● Indicates [ON/OFF] condition of heated oxygen
sensor 2 heater determined by ECM according
to the input signals.
IDL A/V LEARN
[YET/CMPLT]
● Display the condition of idle air volume learning
YET: Idle air volume learning has not been per-
formed yet.
CMPLT: Idle air volume learning has already
been performed successfully.
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
SIGNALS
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 signals of the crankshaft posi-
tion 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 [%] ×
● 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.
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