Yamaha MX775 Service Manual page 124

FUEL INJECTION SYSTEM
Error Code No. P0112, P0113
1
Error Code
System or Component
2
Detail of Error
3
Engine Symptoms
4
Engine Running availability
5
DIAG Tool Code
6
Diagnosing
7
Probable Cause
8
9
Error Code
System or Component
10
Detail of Error
Engine Symptoms
Engine Running availability
DIAG Tool Code
Diagnosing
Probable Cause
P0112
Intake Air Temperature Sensor (IAT)
IAT Circuit Low Voltage
• Poor engine start
• Poor driveability
• Deteriorated exhaust
• Unstable engine idling
Able to run engine
Mode "DIAG", Code "IAT"
• 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.
• 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
P0113
Intake Air Temperature Sensor (IAT)
IAT Circuit High Voltage or Open
• Poor engine start
• Poor driveability
• Deteriorated exhaust
• Unstable engine idling
Able to run engine
Mode "DIAG", Code "IAT"
• 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.
• 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
5-13