Yamaha MX775 - Page 125

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ELECTRICAL
FUEL INJECTION SYSTEM
Error Code No. P0117, P0118
Error Code P0117
System or Component Engine Temperature Sensor (ET)
Detail of Error Engine Temperature Sensor Circuit Low Voltage
Engine Symptoms
• Poor engine start
• Poor driveability
• Deteriorated exhaust
• Unstable engine idling
Engine Running availability Able to run engine
DIAG Tool Code Mode “DIAG”, Code “ET”
Diagnosing
• Compare the sensor output value with ambient air temperature.
(with engine cold)
• Confirm the sensor output value on display changes with heating or
cooling sensor alone.
• Sensor resistance: 9.0–11.0 k at 25 C (77 F)
Probable Cause
• Malfunction in wire harness and coupler between sensor and ECU
• Low voltage in wire harness between sensor and ECU
• Malfunction in sensor unit
• Malfunction in ECU
Error Code P0118
System or Component Engine Temperature Sensor (ET)
Detail of Error Engine Temperature Sensor Circuit High Voltage or Open
Engine Symptoms
• Poor engine start
• Poor driveability
• Deteriorated exhaust
• Unstable engine idling
Engine Running availability Able to run engine
DIAG Tool Code Mode “DIAG”, Code “ET”
Diagnosing
• Compare the sensor output value with ambient air temperature.
(with engine cold)
• Confirm the sensor output value on display changes with heating or
cooling sensor alone.
• Sensor resistance: 9.0–11.0 k at 25 C (77 F)
Probable Cause
• Malfunction in wire harness and coupler between sensor and ECU
• High voltage or open in wire harness between sensor and ECU
• Malfunction in sensor unit
• Malfunction in ECU