Is battery
voltage measured at LW
line of fan motor
conector?
Check and repair motor and
brush.
NO
YES
Is battery
voltage measured at
GW line of fan motor
conector?
LW line between FM1
connector and relay box F1 is
broken or contact of connector
is defective.
BR line between controller and
relay box (AR
3) is broken or
contact of connector is
defective.
• AR3 relay is defective.
• GW and G lines between fan
motor and relay box (AR3) is
broken or contact of connector
is defective.
YES
YES
Is battery
voltage measured at
BR line of AR3 coil?
NO
Controller is defective.
Is under
0.5V measured at W
terminal of controller?
NO
YES
YES
Evaporator fan motor will not
operate.
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