Inputs And Outputs
WARNING: This page is about a different car, the 2006 Land Rover Range Rover. However, it is still accessible from the selected car via links, so may be relevant.
Five electrical connectors provide the interface between the ATC module and the vehicle/heater assembly wiring.
Both the manual and automatic systems receive ambient temperature, engine coolant temperature, engine speed and vehicle speed inputs in K bus messages from the instrument cluster. If the K bus messages are missing or faulty, the ATC module adopts the following default values:
- Ambient temperature = 0°C (32°F).
- Engine coolant temperature = 80°C (176°F).
- Engine speed = 800 rev/min.
- Vehicle speed = zero.
If a fault develops in the input from the temperature selector switch on the control panel, the ATC module adopts a default value of 24°C (75°F).
ATC MODULE HARNESS CONNECTOR C0249 PIN DETAILS
| Pin No. | Description | System | Input/Output | |
|---|---|---|---|---|
| Manual | Automatic | |||
| 1 | Front seat heating battery power supply | Yes | Yes | Input |
| 2 | (LH) front seat heater power supply | Yes | Yes | Output |
| 3 | (RH) front seat heater power supply | Yes | Yes | Output |
ATC MODULE HARNESS CONNECTOR C0923 PIN DETAILS
| Pin No. | Description | System | Input/Output | |
|---|---|---|---|---|
| Manual | Automatic | |||
| 1 | Rear blower control voltage | No | Yes | Output |
| 2 | Rear blower switch signal | No | Yes | Input |
| 3 | Not used | - | - | - |
| 4 | (LH) heater temperature sensor | No | Yes | Input |
| 5 | (RH) heater temperature sensor | Yes | Yes | Input |
| 6 | Evaporator temperature sensor | Yes | Yes | Input |
| 7 | Blower control voltage | Yes | Yes | Output |
| 8 | Rear temperature switch | No | Yes | Input |
| 9 | Sensor ground (evaporator, heater temperature sensors, rear passenger face register, as applicable) | Yes | Yes | - |
| 10 to 12 | Not used | - | - | - |
| 13 | Recirculation door motor signal 2 | Yes | Yes | Input |
| 14 | Recirculation door motor signal 2 | Yes | Yes | Output |
| 15 | Recirculation door motor signal 1 | Yes | Yes | Output |
| 16 | Recirculation door motor signal 1 | Yes | Yes | Input |
| 17 | Rear blower switch and rear temperature switch power supply | No | Yes | Output |
| 18 | Not used | - | - | - |
ATC MODULE HARNESS CONNECTOR C1629 PIN DETAILS
| Pin No. | Description | System | Input/Output | |
|---|---|---|---|---|
| Manual | Automatic | |||
| 1 | Ignition power supply | Yes | Yes | Input |
| 2 | Sunlight sensor ground | No | Yes | - |
| 3 | K bus | Yes | Yes | Input/Output |
| 4 | Delayed accessory power | Yes | Yes | Input |
| 5 | (LH) coolant valve | Yes | Yes | Output |
| 6 | (RH) coolant valve | No | Yes | Output |
| 7 | HRW relay | Yes | Yes | Output |
| 8 | Windshield washer jets heater relay | Yes | Yes | Output |
| 9 | Auxiliary coolant pump | Yes | Yes | Output |
| 10 | Refrigerant pressure sensor signal | Yes | Yes | Input |
| 11 | Not used | - | - | - |
| 12 | Pollution sensor signal | No | Yes | Input |
| 13 | Pollution sensor power supply | No | Yes | Output |
| 14 | Heated windshield relay | Yes | Yes | Output |
| 15 | (LH) seat heating temperature sensor | Yes | Yes | Output |
| 16 | (RH) seat heating temperature sensor | Yes | Yes | Output |
| 17 | Engine full load signal | Yes | Yes | Input |
| 18 | (LH) sunlight sensor signal | No | Yes | Input |
| 19 | (RH) sunlight sensor signal | No | Yes | Input |
| 20 | Refrigerant pressure sensor ground | Yes | Yes | - |
| 21 | Refrigerant pressure sensor power supply | Yes | Yes | Output |
| 22 | Coolant changeover valve | Yes | Yes | Output |
| 23 | Instrument illumination | Yes | Yes | Input |
| 24 | Sunlight sensor power supply | No | Yes | Output |
| 25 | Pollution sensor heater ground | No | Yes | - |
| 26 | Pollution sensor heater power supply | No | Yes | Output |
ATC MODULE HARNESS CONNECTOR C1630 PIN DETAILS
| Pin No. | Description | System | Input/Output | |
|---|---|---|---|---|
| Manual | Automatic | |||
| 1 | Battery power supply | Yes | Yes | Input |
| 2 | air conditioning (A/C) compressor clutch | Yes | Yes | Output |
| 3 | System ground | Yes | Yes | - |
ATC Module Harness Connector C2295 Pin Details
| Pin No. | Description | System | Input/Output | |
|---|---|---|---|---|
| Manual | Automatic | |||
| 1 | M bus power supply | No | Yes | Output |
| 2 | M bus ground | No | Yes | - |
| 3 | M bus interface line | No | Yes | Input/Output |