Central Timer Module Diagnostic Trouble Codes

The Central Timer Module (CTM)'s Diagnostic Trouble Codes (DTCs) are 2 digits in length and are output to the operator by the sounding of the chime.







The first digit is output, followed by a one second pause, followed by the next digit. Each digit is made up of 1 to 9 one-second individual chime tones. The illustration represents the output of the DTC 21.