Yamaha XV1700PCR Road Star Warrior, Service Manual

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6 - 36
FI
FUEL INJECTION SYSTEM
Symptom Engine trouble warning light blinks while the start switch is being pressed (to warn that the engine
is unable to start).
Probable mal-
function area • Malfunction in Fuel injection system relay
• Open circuit in wiring harness
• Disconnected battery
• Defective crankshaft position sensor (See page 5-59.)
• Defective sidestand switch (See page 6-24.)
• Tripped lean angle cut-off switch (See page 6-28, 6-30.)
• ECU memory check error
Inspection method 1
Inspection by diagnosis mode
Inspection method 2
Inspection of a malfunction that cannot be identified in the
diagnosis mode, and in case the area of the malfunction has
been narrowed down in the inspection method 1.
• Execute diagnostic code 50
To trip the relay unit.
• Execute diagnostic code 09
To check the monitor voltage.
* To distinguish whether the problem is in the
relay or in other areas.
• Relay unit does not trip.
Inspect the coil side of the relay unit.
Refer to “FUEL INJECTION SYSTEM” in chapter 7.
Defective: replace
Inspect the wiring harness and couplers for continuity.
Defective: repair or replace
• Normal voltage is not displayed.
Inspect the contact side of the fuel relay unit.
Refer to “FUEL INJECTION SYSTEM” in chapter 7.
Defective: replace
Inspect the wiring harness and couplers for continuity.
Defective: repair or replace
• If a self-diagnostic code is displayed:
Inspect the battery.
Defective: replace or recharge
Inspect and repair the applicable area of the malfunction.