Honda CBR125R Owner's Manual page 132

FUEL SYSTEM (PGM-FI)
MIL 21 BLINKS (O
• Do not get grease, oil or other materials in the O
sensor air hole.
• Do not reuse O
is disconnected, replace the O
a new one.
• Before starting the inspection, check for loose or
poor contact on the O
sensor cap and recheck the MIL blinking.
1. O Sensor System Inspection
2
Turn the ignition switch ON (and engine stop
switch " ": CM and U type).
Start the engine and warm up the engine up to
coolant temperature is 80°C (176°F).
Test-ride the motorcycle and recheck the MIL
blinking.
Does the MIL blink 21 times?
YES
NO
2. O Sensor Short Circuit Inspection
2
Turn the ignition switch OFF.
Disconnect the O
5).
Check for continuity between the O
connector of the wire side and ground.
Connection: Black/orange – Ground
Is there continuity?
YES
NO
3. O Sensor Open Circuit Inspection
2
Connect the ECM test harness to the ECM 33P
connector.
Check the continuity between the ECM test har-
ness and O
side.
Connection: 3 – Black/orange
Is there continuity?
YES
NO
5-40
SENSOR)
2
sensor cord, if the O
2
sensor cord with
2
sensor 2P connector or O
2
– GO TO STEP 2.
– Intermittent failure
sensor 2P connector (page 7-
2
– Short circuit in Black/orange wire
– GO TO STEP 3.
sensor 2P connector of the wire
2
– GO TO STEP 4.
– Open circuit in Black/orange wire
2
sensor cap
2
2
O SENSOR 2P CONNECTOR
2
(Wire side/male terminal)
sensor 2P
2
(3)
O SENSOR 2P CONNECTOR
2
(Wire side/male terminal)