Fuel Pump; Ect Sensor Inspection - Honda Metropolitan CHF50 Service Manual

LIGHTS/M ETERS/SWITCH ES
ECT SENSOR INSPECTION
Remove the luggage box (page 2-6).
Drain the coolant (page 6-7).
Disconnect the ECT sensor connector and remove
the ECT sensor.
Keep all flammable
materials away
from the electric
heating
element. Wear
protective clothing,
insulated gloves
and eye protection.
Suspend the ECT sensor in a pan of coolant (1:1
mixture) on an electric heating element and mea-
sure the resistance between the ECT sensor termi-
nal and body as the coolant heats up.
NOTE:
• Soak the ECT sensor in coolant up to its threads
with at least 40 mm (1.57 in) from the bottom of
the pan to the bottom of the sensor.
• Keep the temperature constant for 3 minutes
before testing. A sudden change of temperature
will result in incorrect reading. Do not let the
thermometer or ECT sensor touch the pan.
Measure the resistance between the ECT sensor
terminal and its threads.
Temperature
Resistance
50°C (122°F)
690 - 860 il
130°C (266°F)
68 - 83 0.
If the resistance is out of above range, replace the
ECT sensor.
Apply sealant to the ECT sensor threads. Do not
apply sealant to the sensor head.
Install and tighten the ECT sensor.
TORQUE: 10 N-m (1.0 kgf-m, 7 Ibf-ft)
Connect the ECT sensor connector.
Fill and bleed the cooling system (page 6-7).
Install the luggage box (page 2-6).
FUEL PUMP
NOTE:
• When the ECM detects a problem in the fuel
pump circuit while the engine is running, the
engine speed will gradually lower via the ignition
circuit until finally the ignition and engine will be
stopped. After about 1 minute, power to the main
relay is also stopped.
nzzTi
o o Aft
ECT SENSOR
18-16