DESCRIPTION AND OPERATION
RANGE ROVER 4.53
AUTOMATIC TEMPERATURE CONTROL (ATC)
DESCRIPTION
General
The Automatic Temperature Control (ATC) system is controlled by the ATC ECU, which is
located behind the centre console. ATC features automatic control of a common
temperature setting for both sides of the passenger compartment, with manual control of the
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 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 then U
wire. Maxi fuse 64 (C0580) provides a constant battery feed to the 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.
Fuse 53 (C0583) provides a constant battery feed to the ignition switch (C0099 on Td6
vehicles, C0028 on V8 vehicles) on an R wire. When the ignition switch is turned to the
'ignition' position, current flows across the switch (C0099 on Td6 vehicles, C0028 on V8
vehicles) to fuse 34 of the passenger compartment fuse box (C0585) on a G wire. Fuse 34
(C0587) provides an ignition feed to the ATC ECU (C1629) on a GY wire.
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