Yamaha ROADLINER XV19SW, Service Manual

Page: 381 / 444

FUEL INJECTION SYSTEM
7-37
Sensor operation table
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.
—
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
cylinder-#1 intake air pres-
sure) Displays the cylinder-#1 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
cylinder-#2 intake air pres-
sure) Displays the cylinder-#2 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 air temperature with
the meter display value.
07 Vehicle speed pulse 0–999 Check that the number in-
creases when the rear
wheel is rotated. The num-
ber is cumulative and does
not reset each time the
wheel is stopped.
08 Lean angle sensor Remove the lean angle
sensor and incline it more
than 65 degrees.
• Upright 0.4–1.4
• Overturned 3.7–4.4
Fault
code
No.
Symptom Probable cause of malfunction
Diagnostic
code No.