DESCRIPTION AND OPERATION
4.56 RANGE ROVER
AUTOMATIC TEMPERATURE CONTROL (ATC) – COMFORT
DESCRIPTION
General
The 'Comfort' Automatic Temperature Control (ATC) system is controlled by the ATC ECU,
which is located behind the centre console. In addition to the features included on the low
line system, the 'Comfort' ATC system also features a second coolant valve, a pollution
sensor, and a rear blower unit.
The 'Comfort' ATC system is fully automatic, with separate temperature settings for the LH
and RH sides of the passenger compartment. Manual override is available for blower speed,
air recirculation, and air distribution.
A Fuel Burning Heater (FBH) is fitted as standard on Td6 vehicles, and as an option on V8
vehicles. For more information on FBH operation, refer to the relevant Fuel Burning Heater
(FBH) section of this manual.
+ FUEL BURNING HEATER – Td6.
+ FUEL BURNING HEATER – V8.
For more details on ATC operation, refer to the Air Conditioning section of the System
Description and Operation Workshop manual.
OPERATION
Power Distribution
Feed from the positive battery terminal (C0192) is supplied to the following on an R wire:
l Fusible link 5.
l Maxi fuse 61.
l Maxi fuse 64.
l Fuse 12.
l Fuse 53.
All are located in the passenger compartment fuse box (C0632). Maxi fuse 61 (C0581)
provides a constant battery feed to the cooling fan control unit (C0005) on an RU wire. Maxi
fuse 64 (C0580) provides a constant battery feed to the front blower motor control unit
(C2281) on an RU then YG wire.
Fuse 12 (C0586) provides a constant battery feed to the ATC ECU (C1630) on an RP wire.
The ATC ECU (C1630) is earthed on an N wire.
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