Yamaha Vmax VMX17C 2009 Service Manual page 482

Fault code No.
Item
1 Defective intake air pressure sensor or
atmospheric pressure sensor.
Reinstatement method
Fault code No.
Item
Fail-safe system
Diagnostic code No.
Meter display
Checking method
Probable cause of malfunction
1 Installed condition of coolant tempera-
ture sensor.
2 Connections
• Coolant temperature sensor coupler
• Wire harness ECU coupler
• Sub-wire harness coupler
3 Open or short circuit in wire harness
and/or sub-wire harness.
4 Defective coolant temperature sensor.
Reinstatement method
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.
• Execute the diagnostic mode. (Code No. D:03
and/or D:02)
• Replace if defective.
Refer to "CHECKING THE INTAKE AIR
PRESSURE SENSOR" on page 8-139 or
"CHECKING THE ATMOSPHERIC PRES-
SURE SENSOR" on page 8-138.
Turning the main switch to "ON".
21
Coolant temperature sensor: open or short circuit detected.
Able to start engine
Able to drive vehicle
D:06
Displays the coolant temperature.
Compare the actually measured coolant temperature with the
meter display value.
• Check for looseness or pinching.
• 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 coolant temperature sensor coupler
and sub-wire harness coupler.
(black/blue–black/blue)
(green/orange–green/orange)
• Between sub-wire harness coupler and ECU
coupler.
(black/blue–black/blue)
(green/white–green/white)
• Execute the diagnostic mode. (Code No. D:06)
• Replace if defective.
Refer to "CHECKING THE COOLANT TEM-
PERATURE SENSOR" on page 8-136.
Turning the main switch to "ON".
8-49
FUEL INJECTION SYSTEM
Check or maintenance job