FUEL INJECTION SYSTEM
8-42
Sensor operation table
Er-1
No signals are received
from the ECU.
• Open or short circuit in wire harness.
• Malfunction in meter.
• Malfunction in ECU.
• Defective wire connection of the ECU cou-
pler.
—
Er-2
No signals are received
from the ECU within the
specified duration.
• Improper connection in wire harness.
• Malfunction in meter.
• Malfunction in ECU.
—
Er-3
Data from the ECU cannot
be received correctly.
• Improper connection in wire harness.
• Malfunction in meter.
• Malfunction in ECU.
—
Er-4
Non-registered data has
been received from the
meter.
• Improper connection in wire harness.
• Malfunction in meter.
• Malfunction in ECU.
—
Fault
code
No.
Symptom Probable cause of malfunction
Diagnostic
code No.
Diag-
nostic
code
No.
Item Meter display Checking method
01 Throttle angle
• Fully closed position 12–22 Check with throttle fully
closed.
• Fully opened position 87–107 Check with throttle fully
open.
03 Pressure difference
(atmospheric pressure and
front cylinder intake air
pressure)
Displays the front cylinder in-
take air pressure.
Set the engine stop switch
to “”, and then push the
start switch “”. (If the dis-
play value changes, the
performance is OK.)
04 Pressure difference
(atmospheric pressure and
rear cylinder intake air
pressure)
Displays the rear cylinder in-
take air pressure.
Set the engine stop switch
to “”, and then push the
start switch “”. (If the dis-
play value changes, the
performance is OK.)
05 Air temperature Displays the air temperature. Compare the actually mea-
sured intake air tempera-
ture with the meter display
value.
06 Coolant temperature Displays the coolant temper-
ature.
Compare the actually mea-
sured coolant temperature
with the meter display val-
ue.
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