Yamaha VMAX 2009 Service Manual page 481

Fault code No.
Item
Fail-safe system
Diagnostic code No.
Meter display
Checking method
Probable cause of malfunction
1 Connections
• Wire harness ECU coupler
2 Open or short circuit in wire harness.
3 Defective sidestand switch.
Reinstatement method
Fault code No.
Item
Fail-safe system
Diagnostic code No.
Meter display
D:03
Checking method
Meter display
D:02
Checking method
Probable cause of malfunction
19
Sidestand switch: a break or disconnection of the blue/yellow
lead of the ECU is detected.
Unable to start engine
Unable to drive vehicle
D:20
Sidestand switch
• ON (stand retracted)
• OFF (stand extended)
Set on/off the sidestand switch. (with the transmission in gear.)
• 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.
• Repair or replace if there is an open or short
circuit.
• Between ECU and blue/yellow lead.
• Execute the diagnostic mode. (Code No. D:20)
• Replace if defective.
Refer to "CHECKING THE SWITCHES" on
page 8-129.
If the transmission is in gear, retracting the sidestand.
If the transmission is in neutral, reconnecting the wiring.
20
Intake air pressure sensor or atmospheric pressure sensor:
when the main switch is turned to "ON", the atmospheric pres-
sure sensor voltage and intake air pressure sensor voltage dif-
fer greatly.
Able to start engine
Able to drive vehicle
D:03, D:02
Displays the intake air pressure.
Set the engine stop switch to "
" ". (If the display value changes, the performance is OK.)
Displays the atmospheric pressure.
Compare the actually measured atmospheric pressure with the
meter display value.
8-48
FUEL INJECTION SYSTEM
Check or maintenance job
", and then push the start switch
Check or maintenance job