YH4
GRAND
VITARA
HEATER AND VENTILATION 1A-3
BODY VENTILATION
The body ventilation system of this vehicle has a fresh air intake located at the cowl top panel. When fresh air intake
control lever is at FRESH AIR position, ventilating air is drawn into the interior from the cowl center garnish and
drawn out from the ventilator outlet provided at each side body outer panel (both right and left side).
DIAGNOSIS
DIAGNOSIS TABLE
Trouble Possible cause Remedy
Heater blower won’t
work even when its
switch is ON.
Blower fuse blown
Blower resistor faulty
Blower motor faulty
Wiring or grounding faulty
Replace fuse to check for short.
Check resistor.
Replace motor.
Repair as necessary.
Incorrect temperature
output.
Control cables broken or binding
Air damper broken
Air ducts clogged
Heater radiator leaking or clogged
Heater hoses leaking or clogged
Check cables.
Repair damper.
Repair air ducts.
Replace radiator.
Replace hoses.
When mode control
switch is changed,
air outlet port is not
changed.
Mode control switch faulty
Mode actuator faulty
Fuse blown
Wiring or grounding faulty
Air damper broken
Air ducts clogged
Check and replace as necessary.
Check and replace as necessary.
Replace fuse to check for short.
Repair as necessary.
Repair damper.
Repair air ducts.
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