Operation and Maintenance
Gage Driver Outputs
Gage outputs operate when CANdrive module reads valid J1939 data for engine speed, oil pressure and coolant temperature. If CANdrive module stops receiving valid data, the gage outputs are maintained at the last known value for approximately five seconds, after which time the outputs are turned off.
Indicating LEDs
All standard models have a green CAN status LED. A flashing CAN status LED indicates that CANdrive module is powered, but is not receiving any J1939 data. A constantly lit CAN status LED indicates a good CANbus connection and J1939 activity. (Note: J1939 activity can originate from ANY device on the CANbus network, and may not be valid data from the engine ECU.)
Model CDV300R has additional LEDs for indication of engine faults, as transmitted from the ECU. CANdrive modules respond to single DM1 (active fault code) messages that contain a Suspect Parameter Number (SPN), Fault Mode Indicator (FMI) and warning/stop lamp data.
CANdrive modules also read
LEDs typically light continuously to indicate a shutdown fault, and flash to indicate a (non- shutdown) warning fault.
CANdrive modules can handle up to 8 simultaneous faults at one time; additional fault messages are not registered. When a fault becomes inactive and is no longer broadcast, the appropriate LED goes out after approximately two seconds.
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