Yamaha Vmax VMX17C 2009 Service Manual page 494

Fault code No.
Item
Probable cause of malfunction
1 Connections
• Relay unit coupler
• Wire harness ECU coupler
• Right handlebar switch coupler
• Battery terminal
2 Open or short circuit in the wire harness. • Repair or replace if there is an open or short
3 Malfunction or open circuit in fuel pump
relay.
Reinstatement method
Fault code No.
Item
Fail-safe system
Diagnostic code No.
Meter display
Checking method
Probable cause of malfunction
1 Malfunction in ECU.
Reinstatement method
43
Fuel system voltage: the ECU is unable to monitor the battery
voltage (an open or short circuit in the line to the ECU).
• Check the coupler for any pins that may be
pulled out.
• Check the locking condition of the coupler.
• If there is a malfunction, repair it and connect
the coupler securely.
circuit.
• Between relay unit coupler and ECU coupler.
(blue/red–blue/red)
(red/blue–red/blue)
• Between relay unit coupler and right handlebar
switch coupler.
(red/blue–red/blue)
• Between relay unit coupler and battery termi-
nal.
(brown/white–red)
• Execute the diagnostic mode. (Code No. D:09)
• Replace if defective.
• If there is no malfunction with the fuel pump re-
lay, replace the ECU.
Starting the engine and operating it at idle.
44
EEPROM fault cylinder No.: an error is detected while reading
or writing on EEPROM (CO adjustment value).
Able/Unable to start engine
Able/Unable to drive vehicle
D:60
EEPROM fault code display
• 00 (no history)
• 01–04 (Cylinder fault code) (history exists)
(If more than one cylinder is defective, the display alternates ev-
ery two seconds to show all the detected cylinder numbers.
When all cylinder numbers are shown, the display repeats the
same process.)
—
• Execute the diagnostic mode (Code No. D:60).
1. Check the faulty cylinder number. (If multi-
• Replace ECU if defective.
Turning the main switch to "ON".
8-61
FUEL INJECTION SYSTEM
Check or maintenance job
Check or maintenance job
ple cylinders are defective, the numbers of
the faulty cylinders are displayed alternately
at 2-second intervals.)