Input/Output Status

Compressor Clutch 

The ATC Module transmits this data. A status of "ON" indicates that the compressor is operational. A status of "OFF" indicates the compressor is not operational.

Compres SO Accel (Compressor Shut Off - Due To Acceleration) 

The Engine Control Module transmits this data. A status of "YES" indicates that the compressor shut off because of an acceleration request. A status of "NO" indicates that there is no acceleration request. If shut off due to an acceleration request, the compress will switch on again after 20 seconds. In addition, the original acceleration request can no longer exist for the ECM to acknowledge a subsequent request. In the event of a CAN Bus communication failure, "NO" is displayed as a substitute value.

Compres SO W/E-Off (Compressor Shut Off - Due to Emergency Off) 

The Engine Control Module transmits this data. A status of "YES" indicates that the compressor shut off because of an emergency off request. A status of "NO" indicates that there is no emergency off request. In the event of a CAN Bus communication failure, the last stored value is displayed as a substitute value.

Auxiliary Fan 

The ATC Module transmits this data. A status of "ON" indicates that the auxiliary fan is operational. A status of "OFF" indicates that the auxiliary fan is not operational. The Auxiliary Fan normally operates when refrigerant head pressure exceeds 290 PSI and coolant temperature exceeds 221°F. In the event of a CAN Bus communication failure, 257°F is displayed for coolant temperature (in Sensors) and the Auxiliary Fan will run continuously.

Light PB CTRL Module 

This input displays a status of "Bright" for positive dimmer switch operation and "Dimmed" for negative dimmer switch operation. In the event of a CAN Bus communication failure, "Bright" is displayed.