Faulty Coolant Heater Control Module
Coolant Heater Control Module harness is open or shorted
Coolant Heater Control Module circuit poor electrical connection
Faulty Heating, Ventilation, and Air Conditioning (HVAC) Control Module
Engine Light ON (or Service Engine Soon Warning Light)
The Local Interconnect Network (LIN) Bus consists of a single wire with a transmission rate of 10.417 Kbit/s. The serial data is transmitted over a LIN circuit between a master control module and other LIN devices within a particular subsystem. If serial data communication is lost between any of the LIN devices on the LIN bus network, the master control module will set a no communication code against the non-communicating LIN device. The Diagnostic Trouble Code (DTC) will set when a supervised periodic message to the Heating, Ventilation, and Air Conditioning (HVAC) Control Module from the Coolant Heater Control Module has not been received.