Yamaha Vmax VMX17C 2009 Service Manual page 489

Fault code No.
Item
2 Open or short circuit in wire harness
and/or ignition coil sub-wire harness 2.
3 Defective cylinder-#4 ignition coil.
Reinstatement method
Fault code No.
Item
Fail-safe system
Diagnostic code No.
Actuator operation
D:36
Checking method
Actuator operation
D:37
Checking method
Actuator operation
D:38
Checking method
Actuator operation
D:39
Checking method
Probable cause of malfunction
1 Connections
• Injector coupler
• Wire harness ECU coupler
• Sub-wire harness coupler
36
Cylinder-#4 ignition coil: open or short circuit detected in the
primary lead of the cylinder-#4 ignition coil.
• Repair or replace if there is an open or short
circuit.
• Between cylinder-#4 ignition coil coupler and
ignition coil sub-wire harness 2 coupler.
(black/orange–black/orange)
(black–black)
• Between ignition coil sub-wire harness 2 cou-
pler and ECU coupler.
(gray/green–gray/green)
• Between ignition coil sub-wire harness 2 cou-
pler and right handlebar switch coupler.
(red/blue–red/blue)
• Execute the diagnostic mode. (Code No. D:33)
• Test the primary and secondary coils for conti-
nuity.
• Replace if defective.
Refer to "CHECKING THE IGNITION COILS"
on page 8-131.
Starting the engine and operating it at idle.
39
Injector: open or short circuit detected.
Able to start engine (depending on the number of faulty cylinders)
Able to drive vehicle (depending on the number of faulty cylinders)
D:36, D:37, D:38, D:39
Actuates the injector #1 five times at one-second intervals.
Illuminates the engine trouble warning light.
Check the operating sound of the injector #1 five times.
Actuates the injector #2 five times at one-second intervals.
Illuminates the engine trouble warning light.
Check the operating sound of the injector #2 five times.
Actuates the injector #3 five times at one-second intervals.
Illuminates the engine trouble warning light.
Check the operating sound of the injector #3 five times.
Actuates the injector #4 five times at one-second intervals.
Illuminates the engine trouble warning light.
Check the operating sound of the injector #4 five times.
• Check the couplers for any pins that may be
pulled out.
• Check the locking condition of the couplers.
• If there is a malfunction, repair it and connect
the coupler securely.
8-56
FUEL INJECTION SYSTEM
Check or maintenance job