Honda VFR800F 2014 Service Manual page 382

BATTERY/CHARGI NG SYSTEM
DTC 2-1 (MP SENSOR)
1.
Sensor lnput Voltage lnspection
Disconnect
the MP
sensor
3P
(Black)
connector
(page
12-20).
Turn
the
ignition switch ON and
measure
the
voltage between the wire harness side 3P
(Black)
connector [1] terminal and ground.
CONNECTION:
Yellodred
(+) -
Ground
(-)
ls
there
approximately
5
V?
YES
-
GOTOSTEP2.
NO -
Open
or
short
circuit
in the Yellow/red wire
between the MP sensor and ECM.
2.
Sensor
Signa!/Ground
Line Short
Circuit
lnspection
Turn the ignition switch OFF.
Disconnect
the
regulator/rectifier
4P
(Gray)
connector
(page
19-8).
Check the for
continuity between each terminal of
the wire
harness side MP
sensor
3P
(Black)
conneclor [1] and ground.
CONNEGTION: Gray/blue - Ground
Green/white - Ground
ls
there
continuity?
YES
- .
Short circuit in the Gray/blue wire
.
Short circuit in
the
Green/white wire
NO -
GOTO
STEP
3.
3. Sensor
Signal/Ground
Line
Open
Gircuit
lnspection
Short the wire
harness
side
regulator/rectifier
4P
(Gray) connector
[1]
terminals
with a jumper
wire
t2t.
CONNECTION
:
Gray/blue - Green/white
Check for continuity
between the wire harness side
MP sensor 3P (Black) connector
[3]
terminals.
CONNECTION
:
Gray/blue
-
Green/white
ls
there
continuity?
YES
-
Faulty MP
sensor
NO - .
Open circuit
in
the Gray/blue wire
.
Open circuit
in
the Green/white wire
DTC
3-1
,3-2 or
3-3 (ALTERNATOR
STATOR)
1.
Alternator Charging
Coi!
lnspection
lnspect the charging coil
(page
19-1 1).
Are
the
charging coils normal?
YES
- .
lntermittentfailure
.
Loose
or
poorly
connected alternator
3P (Gray) connector
NO -
Faulty alternator stator
19-10