Honda CBR650RA Shop Manual page 128

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PGM-FI SYSTEM
4. TP Sensor Inspection
Replace the throttle body (TP sensor) with a known
good one (page 7-13).
Connect the disconnected connector(s).
Erase the DTC (page 4-9).
Turn the ignition switch ON and wait for 10 seconds.
Check the DTC with GST or MCS.
Is same DTC indicated?
YES
NO
DTC P0125
Probable cause:
• Faulty ECT sensor or its related circuit
• Insufficient coolant
• Faulty thermostat
• Faulty water pump
• Clogged coolant passage
• Faulty ECM
Symptom/Fail-safe function:
• Hard to start at a low temperature
• Exhaust gas too lean or too rich
• Fuel consumption deterioration
• Driveability deterioration
1. ECT Sensor Inspection
Replace the ECT sensor with a new one.
Erase the DTC (page 4-9).
Warm up the engine until the coolant temperature is
above 25°C (77°F) and wait for 10 minutes.
Check the DTC with GST or MCS.
Is same DTC indicated?
YES
NO
4-24
– Replace the ECM with a new one, and
recheck.
– Faulty original senor unit (TP sensor)
– Replace the ECM with a new one, and
recheck.
– Faulty original ECT sensor