Yamaha XP500, Руководство по обслуживанию

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7 - 10
FI
FUEL INJECTION SYSTEM
EAS00907
Diagnostic mode table
Switch the meter display from the regular mode to the diagnostic mode. To switch the display, refer
to “DIAGNOSTIC MODE”.
NOTE:
• Check the intake temperature and coolant temperature as close as possible to the intake temper-
ature sensor and the coolant temperature sensor respectively.
• If it is not possible to check the atmospheric pressure with an atmospheric pressure gauge, deter-
mine the atmospheric pressure by using 101.12 kPa (1.01 kgf/cm
2
, 14.4 psi) as the standard.
• If it is not possible to check the intake temperature, use the ambient temperature as reference.
46
Power supply to the fuel injection sys-
tem relay is not normal. • Open circuit in wiring harness. (blue/yellow – red/black
line)
• Malfunction in “CHARGING SYSTEM” in chapter 8.
—
50
Faulty ECU (engine) memory. When
this malfunction is detected, the code
number might not appear on the
meter. • Malfunction in ECU (engine). (The program and data are
not properly written on or read from the internal mem-
ory.)
—
Er-1
No signals are received from the ECU
(engine). • Open or short circuit in wiring sub lead.
• Malfunction in meter.
• Malfunction in ECU (engine).
—
Er-2
No signals are received from the ECU
(engine) within the specified duration. • Improper connection in wiring sub lead.
• Malfunction in meter.
• Malfunction in ECU (engine).
—
Er-3
Data from the ECU (engine) cannot
be received correctly. • Improper connection in wiring sub lead.
• Malfunction in meter.
• Malfunction in ECU (engine).
—
Er-4
Non-registered data has been
received from the meter. • Improper connection in wiring sub lead.
• Malfunction in meter.
• Malfunction in ECU (engine).
—
Diagnostic
code
Item Description of action
Data displayed on meter
(reference value)
01
Throttle angle Displays the throttle angle.
• Check with throttle fully closed.
• Check with throttle fully open. 0 ~ 125 degrees
Fully closed position (15 ~ 16)
Fully open position (97 ~ 102)
03
Pressure difference
(atmospheric pressure-
intake air pressure) Displays the pressure difference (atmospheric pres-
sure-intake air pressure).
Engine stop switch is “
”.
• Generate the pressure difference by cranking the
engine with the starter, without actually starting the
engine.
0 ~ 126 kPa (1.26 kgf/cm
2
, 17.9 psi)
05
Intake air temperature Displays the intake air temperature.
• Check the temperature in the air cleaner case. Compare it to the value displayed on
the meter.
06
Coolant temperature Displays the coolant temperature.
• Check the temperature of the coolant. Compare it to the value displayed on
the meter.
07
Vehicle speed pulse Displays the accumulation of the vehicle pulses that
are generated when the front tire is spun. (0 ~ 999; resets to 0 after 999) OK if
the numbers appear on the meter.
08
Lean angle cut-off switch Displays the lean angle cut-off switch values. Upright: 0.4 ~ 1.4 V
Overturned: 3.8 ~ 4.2 V
Fault
code No.
Symptom Probable cause of malfunction Diagnostic code