Honda CBR650F Service Manual page 116

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DTC 23 (O
Probable cause
• Open circuit in Black/white wire between the main
relay and O
• Open or short circuit in White or Black/blue wire
between the O
• Faulty O
• Faulty ECM
DTC 23-1 (O
• Before starting the inspection, check for loose or
poor contact on the O
33P (Gray) connectors, and recheck the DTC.
1. Recheck DTC
Erase the DTC (page 4-7).
Start the engine and check the O
with the MCS.
Is DTC 23-1 indicated?
YES
NO
2. O
2
Turn the ignition switch OFF.
Disconnect the O
(page 2-18).
Measure the resistance between the sensor side O
sensor 4P (Black) connector [1] terminals.
CONNECTION: White – White
STANDARD: 10 – 40 Ω (20°C/68°F)
Is the resistance within standard value?
YES
NO
SENSOR HEATER)
2
O SENSOR
2
sensor
2
sensor and ECM
2
sensor
2
SENSOR HEATER)
2
sensor 4P (Black) and ECM
2
– GO TO STEP 2.
– Intermittent failure
Sensor Heater Resistance Inspection
sensor 4P (Black) connector
2
– GO TO STEP 3.
– Faulty O sensor
2
From main relay
Bl/W
W
Bl/Bu
W
sensor heater
2
2
PGM-FI SYSTEM
ECM
[1]
W W
4-27