Honda NSS250A Reflex 2001-2007, Manual

Page: 591 / 718

LIGHTS/METERS/SWITCHES
22-21
Coat a new O-ring with oil and install it to the VS
sensor.
Installation is in the reverse order of removal.
• Route the wire harness properly (page 1-21).
• Tighten new VS sensor protector socket bolts to
the specified torque.
TACHOMETER
SYSTEM INSPECTION (NSS250S)
When the ignition switch turns ON, check all gauge
needles move to full scale and then return to zero.
If the tachometer needle does not show initial func-
tion but other needles show initial functions, faulty
combination meter.
If all gauge needles do not move, perform the
power and ground line inspection of the combina-
tion meter (page 22-10).
If the tachometer needle shows initial function, but
tachometer does not move with the engine starts,
check as follows:
Remove the screen garnish (page 3-18).
Connect the peak voltage adaptor to the combina-
tion meter 28P (Gray) connector terminal and
ground with the connector connected.
Start the engine and measure the tachometer input
peak voltage.
If the value is normal, replace the combination
meter printed circuit board.
If the measured value is below 10.5 V, replace the
ECM.
If the value is 0 V, inspect the following:
– Inspect the tachometer signal line open circuit
with test probe (page 22-22)
– Inspect the tachometer signal line open circuit
with test harness (page 22-22)
TORQUE: 10 N·m (1.0 kgf·m, 7 lbf·ft)
O-RING
TOOLS:
Imrie diagnostic tester (model 625) or
Peak voltage adaptor
07HGJ-0020100
with commercially available digital multimeter
(impedance 10 M
Ω
/DCV minimum)
CONNECTION: Blue/yellow (+) – ground (–)
PEAK VOLTAGE: 10.5 V minimum
28P CONNECTOR
28P CONNECTOR
(Wire side/female terminal)
Blue/yellow
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