Honda CBR125R, Owner'S Manual

Page: 404 / 430

LIGHTS/METERS/SWITCHES
19-12
COOLANT TEMPERATURE GAUGE/
ECT SENSOR
GAUGE INSPECTION
Lift and support the fuel tank (page 3-6).
The coolant temperature is too high, but the gauge
needle does not moves
Disconnect the ECT sensor 3P connector.
Ground the ECT sensor 3P connector Green/blue
terminal at the wire harness side.
Turn the ignition switch ON and check the coolant
temperature gauge needle.
If the gauge needle moves, check the ECT sensor
(page 19-13).
If the gauge needle does not moves, check for fol-
lowing:
– Open or short circuit in Yellow/green wire
– Open or short circuit in White/green line
– Blown main fuse
– Blown sub fuse
– Faulty main relay (page 19-22)
– Open circuit in Green wire
If the wires and ECT sensor are normal, replace the
coolant temperature gauge (page 19-10).
The coolant temperature is low, but the gauge
needle moves
Turn the ignition switch OFF.
Disconnect the ECT sensor 3P connector.
Turn the ignition switch ON.
If the gauge needle moves, inspect the ECT sensor
(page 19-13).
If the gauge needle does not move, check for a short
circuit in the Green/blue wire. If the wire is OK,
replace the coolant temperature gauge (page 19-10).
ECT SENSOR 3P CONNECTOR
G/Bu
COOLANT TEMPERATURE GAUGE
G
W/G
G/Bu