Honda VFR800F 2014 Service Manual page 398

LIG HTS/M ETE RS/SWITC
H
ES
TACHOMETER
INSPECTION
NOTE:
.
Before starting
this
inspection,
check
the
combination meter initial operation
(page 20-9).
Tachometer does not
operate
1.
Tachometer Signal Voltage lnspection
Remove
the
combination meter
to
disconnect the
combination meter 20P (Gray) connector
(page 20-
11).
Connect
the peak voltage tester
or
adaptor
[1]
probes
to
the
meter 20P (Gray)
connector
[2]
terminal and ground.
TOOL:
lgnitionMatepeakvottage
MTp07-0286
tester
(U.S.A. only) or
Peak
voltage adaptor
with
07HGJ-0020100
commercially
available digital (not available
in
multimeter
(impedance
U.S.A.
10 MO/DCV
minimum)
CONNECTION; Yellow/green
(+) - Ground
(-)
Start the engine and measure the tachometer signal
peak voltage.
ls there
10.5 V
or more?
YES
-
Faulty combination meter
NO - .
Less than
'10.5
V:
Faulty ECM
.
No voltage: GO TO STEP
2.
2.
Signal
Line Open Gircuit lnspection
Disconnect the ECM 33P (Gray) connector (page 4-
42).
Check for continuity between the
meter 20P (Gray)
connector [1] and ECM 33P
(Gray) connector
[2]
terminals.
TOOL:
Test probe
(2
Pack)
07ZAJ-RDJA110
CONNECTION:
Yellodgreen
-
Yellow/green
ls
there
continuity?
YES
-
GOTOSTEP3.
NO -
Open circuit
in the Yellow/green wire
3.
Signal
Line Short Circuit lnspection
Check the
for
continuity between
the
meter
20P
(Gray) connector [1] and ground.
GONNECTION: Yellow/green - Ground
ls
there continuity?
YES
-
Short circuit
in Yellow/green wire
NO -
Replace the
ECM
with a known good one
and
recheck.
20-14