DTC 81, Invalid Vehicle Configuration Detected: Notes

Serial data circuit is a communication link between CCM, PCM, DERM, EBTCM, RTD module and heater/air conditioning programmer (if equipped with electronic heating/air conditioning). CCM requests and receives information from PCM during start-up. Information is compared to configuration information stored in CCM. This determines if CCM has been programmed for vehicle's current engine configuration.

DTC 81 will set when start-up has occurred and CCM stored engine configuration does not match information received from PCM.

When DTC 81 is set, SYS will flash.

DTC 81 will clear when after start-up, CCM receives configuration information from PCM that matches engine configuration stored in CCM.