Honda NC700 2012, Service Manual

Page: 195 / 773

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PGM-FI SYSTEM
DTC 21-1 (O
2
SENSOR)
• NC700X/XA/S/SA:
Before starting the inspection, check for loose or
poor contact on the O
2
sensor 1P (Black) connector
or O
2
sensor cap and ECM 33P (Black) connector,
then recheck the DTC.
• NC700XD/SD:
Before starting the inspection, check for loose or
poor contact on the O
2
sensor 1P (Black) connector
or O
2
sensor cap and PCM 33P (Gray) connector,
then recheck the DTC.
• If the ECM/PCM is replaced, perform the following:
– Key Registration Procedure (page 23-6)
– Clutch Initialize Learning Procedure (NC700XD/
SD) (page 12-120)
1. O
2
Sensor System Inspection
Turn the ignition switch ON and engine stop switch
" ".
Start the engine and warm up the engine up to
coolant temperature is 80°C (176°F).
Test-ride the motorcycle and check the O
2
sensor
with the HDS pocket tester.
Is the DTC 21-1 indicated?
YES – GO TO STEP 2.
NO – Intermittent failure
2. O
2
Sensor Short Circuit Inspection
Turn the ignition switch OFF.
Disconnect the O
2
sensor 1P (Black) connector [1].
Check for continuity between the O
2
sensor 1P
(Black) connector of the wire harness side and
ground.
Is there continuity?
YES – Short circuit in the White/green wire
NO – GO TO STEP 3.
3. O
2
Sensor Line Open Circuit Inspection 1
Disconnect the following:
– ECM 33P (Black) connector (NC700X/XA/S/SA)
[1]
– PCM 33P (Gray) connector (NC700XD/SD) [1]
Check for continuity between the ECM/PCM 33P
connector and O
2
sensor 1P (Black) connector [2] of
the wire harness side.
Is there continuity?
YES – GO TO STEP 4.
NO – Open circuit in the White/green wire
Connection: White/green – Ground
W/G
[1]
Connection: White/green – White/green
TOOL:
Test probe
07ZAJ-RDJA110
W/G
[1] [2]
W/G