Series 60 DDEC VI Troubleshooting – Section 107.1 SPN 3509/FMI 3

Section 107.1
SPN 3509/FMI 3

This diagnosis typically is Multiplexer 1, Channel 1 or 2 has a short or open circuit high.‪

Section 107.1.1
Channel 1

Multiplexer 1 Channel 1, shorted high will set if the input voltage from either the DOC Temp In, DOC Temp Out or DPF Temp Out exceeds 2.97 volts, which may be caused by a short circuit, or more likely an open circuit. This is an information code only indicating a default value will be used for the other sensor inputs.‪

Section 107.1.2
Channel 2

Multiplexer 1 Channel 2, shorted high will set if the input voltage from the Turbo Compressor Inlet Temperature Sensor exceeds 2.97 volts, which may be caused by a short circuit, or more likely an open circuit. This is an information code only indicating a default value will be used for the sensor input.‪