Truck's MID 231 Fault Codes DTC
Volvo, Renault, Mack Trucks - MID 231 Codes Decryption of Malfunction DTC.
Truck Fault Code, DTC Parameter, Description of DTC
Integrated Cell Phone Control Unit
MID 231 SID 240 FMI 12
Program memory.
Software crash. Turn the phone off and on. Try disconnecting the car’s power from the batteries for a while.
MID 231 SID 251 FMI 2
Phone power.
Power supply voltage on the telephone control unit is higher than 48 V. There is a violation in the power supply system or the generator is faulty.
MID 231 SID 254 FMI 12
Mobile Phone Control Unit.
Processor in the telephone control unit is faulty. Try disconnecting the car’s power from the batteries for a while. If the problem persists, replace the mobile phone control unit.
MID 231 PSID 2 FMI 3
Hands-free speaker (located in the back of the driver's seat).
Voltage at the contacts of the telephone control unit from the speaker is higher than 3.6 V. Short circuit of the wires between the telephone control unit and the speaker to ground. Broken wires in the speaker circuit. The speaker may be malfunctioning.
MID 231 PSID 2 FMI 4
Hands-free speaker (located in the back of the driver's seat).
Voltage at the contacts of the telephone control unit from the speaker is lower than 1.4 V. Shorting the wires between the telephone control unit and the speaker to a higher voltage. Short circuit inside the speaker is possible.
MID 231 PSID 3 FMI 4
Hands-free microphone (located in the back of the driver's seat).
Voltage at the contacts of the telephone control unit from the microphone is below 4 V. Short circuit of wires between the telephone control unit and the microphone to ground. Broken wires in the microphone circuit. Microphone may be malfunctioning.
MID 231 PSID 3 FMI 5
Hands-free microphone (located in the back of the driver's seat).
Voltage at the contacts of the telephone control unit from the microphone is higher than 4.8 V. Shorting the wires between the telephone control unit and the microphone to a higher voltage. Broken wires in the microphone circuit. May be a break inside the microphone.
MID 231 PSID 4 FMI 5
Button in the handset holder.
Voltage at the contacts of the telephone control unit from the switch is lower than 3.3-4.1 V. An open circuit between the switch and the telephone control unit.
MID 231 PSID 5 FMI 3
Microphone in the handset.
Voltage at the contacts of the telephone control unit from the microphone in the handset is higher than 4.5 V. Short circuit of the wires between the telephone control unit and the microphone in the handset to a higher voltage.
MID 231 PSID 5 FMI 4
Microphone in the handset.
Voltage at the contacts of the telephone control unit from the microphone is below 2 V. The short circuit of the wires between the telephone control unit and the microphone to ground. Broken wires in the microphone circuit. Microphone may be malfunctioning.
MID 231 PSID 6 FMI 3
Speaker in the handset.
Voltage at the contacts of the telephone control unit from the speaker in the handset is higher than 4.5 V. Short circuit of the wires between the telephone control unit and the speaker in the handset to a higher voltage.
MID 231 PSID 6 FMI 4
Speaker in the handset.
Voltage at the contacts of the telephone control unit from the speaker is lower than 0.5 V. Short circuit of the wires between the telephone control unit and the speaker to ground. Broken wires in the speaker circuit. Speaker may be malfunctioning.
MID 231 PSID 7 FMI 3
Power the handset.
Power supply voltage of the handset is higher than 13.2 V. Wiring between the handset and the telephone control unit is shorted to ground. Open or partial damage to the wires between the handset and the telephone control unit.
MID 231 PSID 7 FMI 4
Power the handset.
Power supply voltage of the handset is lower than 10.8 V. Wiring between the handset and the telephone control unit is shorted to ground. Open or partial damage to the wires between the handset and the telephone control unit.