Coolant Temperature Indicator/Ect Sensor - Honda 2003 NPS50 Ruckus Service Manual

NOTE:
COOLANT TEMPERATURE INDICATOR/
•
ECT S ENSOR
When the coolant temperature exceeds 1 20 oc
(248 "F), the coolant temperature i ndicator will
blink. The ECM will then control the ignition and
•
reduce engine speed to 9 mph ( 1 5 km/h). At this
time, check the cooling system and engine far
leaks or damage. If everything is OK, check the
following.
Make sure the battery and ground line of the LED
drive unit is normal (page 19-15), before per­
forming this inspection.
SYSTEM INSPECTION
When the coolant temperature indicator does not
light.
1 . Coolant
Inspection ( 1 )
Remov � t h e inner cover (page 3-5).
Ground the Light green/red wire terminal of the
LED drive unit 6P connector with a jumper wire.
Turn the ignition switch to ON, check that the
indicator lights.
Does the indicator light?
NO
YES
2. Coolant
Inspection (2)
Remove the front cover (page 3-6).
Ground the Light green/red wire terminal of the
LED drive unit 6P connector with a jumper wire.
Measure the voltage between the Pink (+) and
Green/blue H wire terminals of the water tem­
perature indicator connectors.
Is there approx. 3V7
NO
YES
Temperature Indicator
GO TO STEP 2.
-
GO TO STEP 3.
-
Temperature Indicator
GO TO STEP 3.
-
Faulty LED
-
LIGHTS/METERS/SWITCHES
COOLANT TEMPERATURE INDICATOR
Circuit
6P CON
Circuit
1 9- 1 5