Honda Transalp XL700V Manual page 181

FUEL SYSTEM (PGM-FI)
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).
Check the MIL blinking.
Is the MIL 21 blinks?
NO
YES
2. O Sensor Open Circuit Inspection
2
Connect the ECM test harness to the ECM con-
nectors (page 5-16).
Disconnect the O
Check for continuity between the test harness
terminals and the O
tor.
Connection: B20 – White/orange
Is there continuity?
NO
YES
Sensor Short Circuit Inspection
3. O
2
Check for continuity between the O
(Black) connector and ground.
Connection: White/orange – Ground
Is there continuity?
YES
NO
4. O Sensor Inspection
2
Replace the O
Start the engine and warm it up to coolant tem-
perature is 80°C (176°F).
Check the MIL blinking.
Is the MIL 21 blinks?
NO
YES
5-50
SENSOR)
2
sensor 4P (Black) connec-
2
– Check the fuel pressure (page 5-56).
– GO TO STEP 2.
sensor 4P (Black) connector.
2
sensor 4P (Black) connec-
2
A18 – Green/orange
– • Open circuit in White/orange wire
• Open circuit in Green/orange wire
– GO TO STEP 3.
– Short circuit in White/orange wire
– GO TO STEP 4.
sensor with a known good one.
2
– Faulty original O sensor
2
– Replace the ECM with a new one, and
recheck; for Key Registration Proce-
dures (page 21-4).
A18
O
2
(Wire side/male terminal)
sensor 4P
2
O SENSOR 4P (BLACK) CONNECTOR
2
(Wire side/male terminal)
B20
G/O
SENSOR 4P (BLACK) CONNECTOR
W/O
W/O