Workshop Manuals Factory service & repair Land Rover
01 Range Rover 2002MY ON Workshop Manual - System Description and Operation - LM - 6th Edition - NAS02 03 04 05 06 07 08 09 ENGINE - V810 11 12 ENGINE MANAGEMENT SYSTEM – V813 14 FUEL DELIVERY SYSTEM – V815 16 17 18 19 20 COOLING SYSTEM – V821 22 MANIFOLDS AND EXHAUST SYSTEM – V823 TRANSFER BOX24 AUTOMATIC TRANSMISSION – ZF 5HP2425 26 DRIVE AND PROPELLER SHAFTS27 28 FINAL DRIVE29 STEERING30 31 SUSPENSION32 33 34 35 BRAKES36 37 38 RESTRAINT SYSTEMS39 40 41 DOORS42 INTERIOR TRIM COMPONENTS43 44 45 SCREENS46 SEATS47 48 SUNROOF49 50 AIR CONDITIONING51 52 53 54 55 56 57 WIPERS AND WASHERS58 59 CHARGING AND STARTING60 61 62 63 64 LIGHTING65 66 BODY CONTROL UNIT67 68 COMMUNICATION DATA BUSES69 70 71 SECURITY72 WINDOWS73 74 75 ENTERTAINMENT AND INFORMATION SYSTEMS76 DRIVING AIDS77 78 INSTRUMENTS
Land Rover L322 Range Rover System Description and Operation50 · AIR CONDITIONING
50 · Heating & A/C

ATC ECU

Make
Land Rover
Model
Range Rover L322 Range Rover System Description and Operation
Section
Description › ATC ECU
AIR CONDITIONINGATC ECU · page 1 of 5
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AIR CONDITIONING

82-20

DESCRIPTION AND OPERATION

Rear Blower Output Stage

ATC ECU
The ATC ECU is installed in the centre of the fascia. An integral control panel contains push switches and rotary 
switches/knobs for system control inputs. Orange tell-tale LED's in the switches and switch surrounds illuminate to 
indicate the current settings of the system. The rotary temperature switch is graduated in degrees Celsius, except on 
USA vehicles, where it is graduated in degrees Fahrenheit.

An in-car temperature sensor and associated electric fan are installed behind a grille in the control panel.

The ATC ECU processes inputs from the control panel switches and system sensors, then outputs the appropriate 
signals to control the A/C system. In addition to controlling the A/C system, the ATC ECU also controls the following:

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The windscreen heater and windscreen wiper parking area heater (optional fit, not available on vehicles with infra 
red protection glass)

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The windscreen washer jet heaters

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The rear window heater

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The front seat heaters.

Low Line Control Panel

1 Windscreen heater switch
2 LH front seat heater switch
3 Temperature switch
4 Blower switch
5 RH front seat heater switch

6 Distribution control knob
7 A/C switch
8 Recirculation switch
9 In-car temperature sensor

10 Rear window heater switch

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