Truck's MID 146 Fault Codes DTC
Decryption of codes of malfunctions (DTC). Volvo, Renault, Mack Trucks - MID 146
Truck Fault Code, Parameter of DTC, DTC Description
Truck Climate Control Unit
MID146 - PID170 - FMI 3
Cabin air temperature sensor.
The climate control unit registers the voltage in the temperature sensor circuit above 4.86 V. The sensor is not connected to the control unit. It is possible that the signal or ground wire is shorted to a higher voltage.
MID146 - PID170 - FMI 4
Cabin air temperature sensor.
The climate control unit registers the voltage in the temperature sensor circuit below 0.7 V. The signal wire is shorted to ground or the sensor is faulty.
MID146 - PID171 - FMI 3
Outside temperature sensor.
The climate control unit registers the voltage in the temperature sensor circuit above 4.9 V. Shorting the signal or ground wire to a higher voltage. Probably defective sensor.
MID146- PID171 - FMI 4
Outside temperature sensor.
The climate control unit registers the voltage in the temperature sensor circuit below 0.55 V. The signal wire is shorted to ground or the sensor is faulty.
MID146 - SID 2 - FMI 3
Air temperature sensor (located between the evaporator and fan).
The climate control unit registers the voltage in the temperature sensor circuit above 4.86 V. The sensor is not connected to the control unit. It is possible to short circuit a signal or ground wire to a higher voltage.
MID146 - SID 2 - FMI 4
Air temperature sensor (located between the evaporator and fan).
The climate control unit registers the voltage in the temperature sensor circuit below 0.24 V. The signal wire is shorted to ground or the sensor is faulty.
MID146 - SID 5 - FMI 4
Stepper motor controls the external air intake and recirculation flap.
The climate control unit registers a short to ground. Shorting the signal wire of the motor to a lower voltage or to ground.
MID146 - SID 6 - FMI 4
Stepper motor control air distribution flaps.
The climate control unit registers a short to ground. Shorting the signal wire of the motor to a lower voltage or to ground.
MID146 - SID 9 - FMI 4
Stepper motor controlling air supply bypassing the heat exchanger.
The climate control unit registers a short to ground. Shorting the signal wire of the motor to a lower voltage or to ground.
MID146 - SID 11 - FMI 4
Clutch for turning on the air conditioning compressor.
Shorting the signal wire to a circuit with a lower voltage or to ground.
MID146 - SID 11 - FMI 5
Clutch for turning on the air conditioning compressor.
Open the ground wire of the compressor clutch or the clutch is faulty.
MID146 SID 12 FMI 3
Coolant flow control valve through the heat exchanger.
Shorting the signal or ground wire to a higher voltage.
MID146 - SID 12 FMI 4
Coolant flow control valve through the heat exchanger.
Shorting the signal wire to ground.
MID146 SID 12 - FMI 5
Coolant flow control valve through the heat exchanger.
Open power, ground wire, fuse F32 is faulty or valve is faulty.
MID 146 SID 13 FMI 3
Air temperature sensor after heat exchanger.
The climate control unit registers the voltage in the temperature sensor circuit above 4.9 V. The sensor is not connected to the control unit. It is possible to short circuit a signal or ground wire to a higher voltage.
MID 146 SID 13 FMI 4
Air temperature sensor after heat exchanger.
The climate control unit registers the voltage in the temperature sensor circuit below 0.24 V. The signal wire is shorted to ground or the sensor is faulty.
MID 146 SID 14 FMI 4
The micro-fan of the cab air temperature sensor (combined with the temperature sensor).
Shorting the signal wire to a lower voltage or to ground.
MID 146 SID 16 FMI 3
Stepper motors, first phase.
Shorting the signal wire of the corresponding phase of the electric motors to a higher voltage.
MID 146 SID 17 FMI 3
Stepper motors, second phase.
Shorting the signal wire of the corresponding phase of the electric motors to a higher voltage.
MID 146 SID 18 FMI 3
Stepper motors, third phase.
Shorting the signal wire of the corresponding phase of the electric motors to a higher voltage.
MID 146 SID 19 FMI 3
Stepper motors, fourth phase.
Shorting the signal wire of the corresponding phase of the electric motors to a higher voltage.
MID 146 SID 22 FMI 3
Refrigerant pressure sensor in the system.
The climate control unit registers a signal with a voltage above 4.5 V. from the pressure sensor. Shorting the signal or ground wire to a higher voltage.
MID 146 SID 22 FMI 4
Refrigerant pressure sensor in the system.
The climate control unit registers a signal with a voltage below 0.3 V from the pressure sensor. Short circuit of the signal wire to ground, wire breakage between the unit and the sensor, or the sensor is not connected to the connector.
MID 146 SID 232 FMI 3
5 V. power supply to the refrigerant pressure sensor in the system.
The climate control unit registers the sensor supply voltage above 5.5 V. Shorting the signal or ground wire to a higher voltage.
MID 146 SID 232 FMI 4
5 V. power supply to the refrigerant pressure sensor in the system.
The climate control unit registers a short to ground. Shorting the signal wire to a lower voltage or to ground.
MID 146 SID 240 FMI 2
Program memory.
Incorrect software, emergency interruption of the programming process or malfunctioning climate control unit.
MID 146 SID 250 FMI 2
Data Channel SAE J1708.
Incorrect information from other blocks. Check fault codes in other control units.
MID 146 SID 250 FMI 3
Data Channel SAE J1708.
The climate control unit registers a voltage above 4.86 V. Shorting the wires of the data channel to a higher voltage.
MID 146 SID 250 FMI 4
Data Channel SAE J1708.
The climate control unit registers a voltage below 0.24 V. Shorting the wires of the data channel to ground.
MID 146 SID 250 FMI 12
Data Channel SAE J1708.
Faulty data channel wires or faulty control unit.
MID 146 SID 253 FMI 2
EEPROM calibration memory.
The programming of the unit is incorrect or the memory chip in the control unit is faulty. Reprogram the cabin climate control unit. In extreme cases, replace the control unit.
MID 146 PSID 6 FMI 3
Main temperature sensor (located in the control unit and microclimate switches).
The climate control unit registers the voltage in the temperature sensor circuit above 4.95 V. Shorting the signal or ground wire to a higher voltage. Replace the climate control unit.
MID 146 PSID 6 FMI 4
Main temperature sensor (located in the control unit and microclimate switches).
The climate control unit registers the voltage in the temperature sensor circuit below 0.05 V. The signal wire is shorted to ground. Replace the climate control unit.
MID 146 PSID 7 FMI 3
Compensation temperature sensor (located in the control unit and microclimate switches).
The climate control unit registers the voltage in the temperature sensor circuit above 4.95 V. Shorting the signal or ground wire to a higher voltage. Replace the climate control unit.
MID 146 PSID 7 FMI 4
Compensation temperature sensor (located in the control unit and microclimate switches).
The climate control unit registers the voltage in the temperature sensor circuit below 0.05 V. The signal wire is shorted to ground. Replace the climate control unit.
MID 146 PSID 8 FMI 4
Solar radiation sensor (located in the control unit and microclimate switches).
The climate control unit registers the voltage in the temperature sensor circuit below 0.05 V. The signal wire is shorted to ground. Replace the climate control unit.
MID 146 PSID 200 FMI 12
Loss of communication on the SAE J1587 data channel with the engine control unit (MID128).
Communication with the engine control unit (MID128) was interrupted for more than 60 seconds. There is no information on coolant temperature and engine speed. Short or open of data channel SAE J1587. Check the integrity of the data channel, check the fault codes in the engine control unit.
MID 146 PSID 201 FMI 12
Loss of communication on the SAE J1587 data channel with the vehicle control unit (MID144).
Communication with the car control unit (MID144) was interrupted for more than 60 seconds. There is no information about the vehicle speed. Short or open data channel SAE J1587. Check the integrity of the data channel, check the fault codes in the vehicle control unit.
MID 146 PSID 202 FMI 12
Lost Communication With SAE J1587 Data Channel With Dashboard Control Unit (MID140)
Communication with the dashboard control unit (MID140) was interrupted for more than 60 seconds. There is no information about the outdoor temperature. Short or open of data channel SAE J1587. Check the integrity of the data channel, check trouble codes in the dashboard control unit.