Range Rover. Manual — part 279
HEATING AND VENTILATION
3
DESCRIPTION AND OPERATION
Heater ECU control panel
1. Windscreen heater switch
2. LH temperature switch
3. Blower switch
4. RH temperature switch
5. Fresh/ Recirculated air switch
6. RH front seat heater switch
7. Demist mode switch
8. Windscreen/ Side window distribution switch
9. Windscreen/ Side window and footwells
distribution switch
10. Footwells distribution switch
11. Face and footwells distribution switch
12. Face distribution switch
13. Rear screen heater switch
14. LH front seat heater switch
Windscreen heater switch
Push switch that operates the windscreen heaters. A
timed function that automatically goes off after
approximately 4 minutes, or immediately if the switch
is pressed again. The switch LED is illuminated while
the heater is active.
LH temperature switch
Rotary switch that controls the temperature of the air
to the LH side of the vehicle interior:
•
Driver’s side temperature control is
dominant over passenger’s. The
temperature set by the passenger is
restricted to a tolerance band of 6
°
C (11
°
F) above or below that set by the driver.
•
The control is overridden when demist
programme switch is selected.
Blower switch
Rotary switch that simultaneously controls the speed
of both blowers:
•
Clockwise rotation progressively increases
blower speed. Anti-clockwise rotation
progressively decreases blower speed.
•
The control is overridden when demist
programme is selected.
RH temperature switch
Rotary switch that controls the temperature of the air
to the RH side of the vehicle interior. Operates the
same as the LH temperature switch.
Fresh/ Recirculated air switch
Push switch that simultaneously controls selection of
fresh or recirculated air in both air inlet housings:
•
Demist programme overrides recirculated
air selection.
•
First press of switch selects recirculated
air. Switch LED illuminated while
recirculated air selected.
•
A second press of the switch restores fresh
air selection. Switch LED extinguished
while fresh air selected.
80
HEATING AND VENTILATION
NEW RANGE ROVER
4
DESCRIPTION AND OPERATION
RH front seat heater switch
Push switch that controls the RH front seat heaters.
Operation is independent of the heating and
ventilation system. The heaters remain active until the
switch is pressed again. The switch LED is illuminated
while the heaters are on.
Demist mode (PROG) switch
Push switch for initiating automatic demist mode:
•
Air inlets set to fresh air.
•
Blower speeds set to optimum.
•
LH and RH temperatures set to maximum.
•
Distribution set to windscreen and side
windows only.
•
Rear screen heater selected on and rear
screen heater switch LED illuminated.
•
Windscreen heaters selected on and
windscreen heater switch LED illuminated.
Windscreen/ Side window distribution switch
Push switch that sets air distribution to windscreen
and front side window vents.
Windscreen/ Side window and footwells
distribution switch
Push switch that sets air distribution to windscreen,
front side windows and footwell vents.
Footwell distribution switch
Push switch that sets air distribution to the footwell
vents.
Face and footwell distribution switch
Push switch that sets air distribution to the face level,
driver’s lap and footwell vents.
Face distribution switch
Push switch that sets air distribution to the face level
and driver’s lap vents.
LH front seat heater switch
Push switch that controls the LH front seat heaters.
Operation is independent of the heating and
ventilation system. The heaters remain active until the
switch is pressed again. The switch LED is illuminated
while the heaters are on.
Rear screen heater switch
Push switch that operates the rear screen heater. A
timed function that automatically goes off after
approximately 15 minutes, or immediately if the switch
is pressed again. The switch LED is illuminated while
the heater is active.
The exterior mirror heaters are activated for
approximately 10 minutes when either the windscreen
or rear screen heaters are activated. There is no
active indicator or independent control for the exterior
mirror heaters.
HEATING AND VENTILATION
5
DESCRIPTION AND OPERATION
Heater ECU connectors
Heater ECU connector pin details
Connector/
Pin No.
Description
Input/Output
C244 (up to
99MY)
C0792 (from
99MY)
1
Auxiliary power supply
Input
2
Battery power supply
Input
3
Ignition power supply
Input
4
Earth
-
5
Windscreen heaters
Output
6
Instrument/ Switch illumination
Input
7 and 8
Not used
-
80
HEATING AND VENTILATION
NEW RANGE ROVER
6
DESCRIPTION AND OPERATION
Connector/
Pin No.
Description
Input/Output
C245 (up to
99MY)
C0766 (from
99MY)
1
RH blower control
Output
2
RH blower safety
Output
3
RH blower voltage feedback
Input
4
LH blower control
Output
5
LH blower safety
Output
6
LH blower voltage feedback
Input
7 and 8
Not used
-
9
RH fresh/ recirculated air servo (+/-)
Input/Output
10
RH fresh/ recirculated air servo (+/-)
Input/Output
11
LH fresh/ recirculated air servo (+/-)
Input/Output
12
LH fresh/ recirculated air servo (+/-)
Input/Output
C246A (up to
99MY)
C1596 (from
99MY)
1
Not used
Input
2
Diagnostics K line
Input/Output
3
Diagnostics L line
Input/Output
4
Engine running (alternator charging)
Input
5 to 8
Not used
-
9
Rear screen heater request
Output
10
Not used
-
11
LH seat heater request
Output
12
RH seat heater request
Output
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