Yamaha MX775 - Page 129

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ELECTRICAL
FUEL INJECTION SYSTEM
Error Code No. P0201, P0202
Error Code P0201
System or Component Fuel Injector
Detail of Error Injector #1 Circuit Malfunction
Engine Symptoms Cylinder #1 stops
Engine Running availability Able to run with Cylinder #2 alone
DIAG Tool Code —
Diagnosing
Fuel injector resistance
11.4–12.6 
Probable Cause
• Malfunction in wire harness and coupler between injector and ECU
• Shorted or open in wire harness between sensor and ECU
• Malfunction in injector
• Malfunction in ECU
Error Code P0202
System or Component Fuel Injector
Detail of Error Injector #2 Circuit Malfunction
Engine Symptoms Cylinder #2 stops
Engine Running availability Able to run with Cylinder #1 alone
DIAG Tool Code —
Diagnosing
Fuel injector resistance
11.4–12.6 
Probable Cause
• Malfunction in wire harness and coupler between injector and ECU
• Shorted or open in wire harness between sensor and ECU
• Malfunction in injector
• Malfunction in ECU