Honda Transalp XL700V Manual page 165

FUEL SYSTEM (PGM-FI)
DTC 21-1 (O
• Before starting the inspection, check for loose or
poor contact on the O
tor and ECM 33P connectors, then recheck the
DTC.
1. O Sensor System Inspection
2
Clear the DTC's (page 5-15).
Start the engine and warm it up to coolant tem-
perature is 80°C (176°F).
Check the O
Is the DTC 21-1 indicated?
NO
YES
2. O Sensor Open Circuit Inspection
2
Turn the ignition switch OFF.
Disconnect the ECM 33P connectors and O
sor 4P (Black) connector.
Check for continuity between the ECM 33P con-
nectors and O
Connection: A18 – Green/orange
TOOL:
Test probe
Is there continuity?
YES
NO
3. O Sensor Short Circuit Inspection
2
Connect the ECM 33P connectors.
Check the continuity between the O
(Black) connector and ground.
Connection: White/orange – Ground
Is there continuity?
YES
NO
5-34
SENSOR)
2
sensor 4P (Black) connec-
2
sensor with the HDS.
2
– Check the fuel pressure (page 5-56).
– GO TO STEP 2.
sensor 4P (Black) connector.
2
B20 – White/orange
07ZAJ-RDJA110
– GO TO STEP 3.
– • Open circuit in Green/orange wire
• Open circuit in White/orange wire
– Short circuit in White/orange wire
– GO TO STEP 4.
sen-
2
G/O
W/O
O SENSOR 4P (BLACK) CONNECTOR
2
(Wire side/male terminal)
O SENSOR 4P (BLACK) CONNECTOR
2
sensor 4P
(Wire side/male terminal)
2
ECM 33P (BLACK) CONNECTOR
(Wire side/female terminal)
B20
ECM 33P (GRAY) CONNECTOR
(Wire side/female terminal)
W/O
A18