Cooling Fam Motor Inspection - Honda TRX450R Service Manual

LIGHTS/SWITCHES (After '05)
Ground the ECT sensor connector with a jumper
wire.
Start the engine and check the indicator.
• If the indicator lights, the system is OK.
• If the indicator does not light or lights for 3 sec-
onds then goes off, check for an open circuit in
the following wire:
- Yellow/blue wire between the ECT sensor and
fan/ICM connectors
- Gray wire between the fan/ICM and indicator
connectors
If the wire is OK, disconnect the indicator 4P natural
(TRX450ER) or 2P red (TRX450R) connector.
Start the engine and measure the voltage between
the Black wire terminal (+) and Gray wire terminal
(-) of the wire harness side connector.
• If there is generating voltage, check for blown
indicator bulb.
• If there is no voltage, check for an open circuit in
the black wire between the indicator and ignition
switch connectors. If the black wire is OK, replace
the fan/ICM.
INDICATOR 4P(TRX450ER) or 2P
(TRX450R) CONNECTOR
COOLING FAN MOTOR
INSPECTION
NOTE:
• Make sure that the coolant temperature indicator
system functions properly before checking the
fan motor system.
Fan motor does not stop when the engine is
running
Disconnect the engine coolant temperature (ECT)
sensor connector.
Start the engine and check the fan motor.
• If the fan motor does not start, check the ECT
sensor (page 24-13).
• If the fan motor starts, check for a short circuit in
the following wire:
- Green wire between the fan/ICM and fan motor
connectors
- Green wire of the fan motor
If the wires are OK, replace the fan/ICM.
ECT SENSOR CONNECTOR
24-12