Honda CBF600SA Service Manual page 161

Manuals by Motomatrix / www.motomatrix.co.uk / The Solution For Lost Motorcycle Coded Keys.
MIL 21 BLINKS (O
• Before starting the inspection, check for loose or
poor contact on the O
tor and ECM 33P connectors, then recheck the
MIL blinking.
1. O Sensor System Inspection
2
Start the engine and warm it up to coolant tem-
perature is 80 °C (176 °F).
Test-ride the motorcycle and recheck the MIL
blinking.
Is the MIL 21 blinks?
YES
NO
2. O Sensor Open Circuit Inspection
2
Turn the ignition switch OFF.
Connect the ECM test harness to the ECM con-
nectors (page 5-14).
Disconnect the O
Check the continuity between the test harness
terminals and the O
of the wire harness side.
CONNECTION: B20 – Orange/white
Are there continuities?
YES
NO
3. O Sensor Short Circuit Inspection
2
Connect the O
Check for continuity between the test harness
terminal and ground.
CONNECTION: B20 – Ground
Is there continuity?
YES
NO
4. O Sensor Inspection
2
Replace the O
(page 5-101).
Start the engine and warm it up until the coolant
temperature is 80 °C (176 °F).
Test-ride the motorcycle and recheck the MIL
blinking.
Is the MIL 21 blinks?
YES
NO
email: info@motomatrix.co.uk
SENSOR)
2
sensor 4P (Black) connec-
2
– GO TO STEP 2.
– Intermittent failure
sensor 4P (Black) connector.
2
sensor connector terminals
2
A18 – Green/orange
– GO TO STEP 3.
– • Open circuit in Orange/white wire
• Open circuit in Green/orange wire
Sensor 4P (Black) connector.
2
– Short circuit in the Orange/white wire
– GO TO STEP 4.
sensor with a known good one
2
– Replace the ECM with a known good
one, and recheck; refer to Key Registra-
tion Procedures (page 21-6)
– Faulty original O sensor
2
FUEL SYSTEM (PGM-FI)
TEST HARNESS
4P (Black) CONNECTOR
PIN BOX
(Wire side/male terminals)
(A TERMINALS)
(A18) (B20)
TEST HARNESS
PIN BOX
(B TERMINALS)
TEST HARNESS PIN BOX
(B TERMINALS)
Green/ Orange/
white
orange
(B20)
5-47