Source: https://truckmanualshub.com/mid184-volvo-fault-codes-for-rear-axle-control-unit-with-an-electronic-hydraulic-control/
Timestamp: 2019-04-25 08:24:33+00:00

Document:
FMI 2 The speed signals received from the car control unit and from the braking system control unit differ from each other by more than 20 km / h. The SAE J1939 data channel is faulty, the wrong speed signals from the car’s control unit MID144 or the braking system control unit MID136. The rear axle control unit may be faulty. First, read the fault codes from MID144 and MID136 blocks and eliminate the causes of their occurrence.
FMI 0 Voltage above 32 V. The generator is faulty or an additional power source is connected to the car.
FMI 3 Power is supplied from an additional power source to an unused connector or the rear axle control unit is faulty.
FMI 4 Voltage below 18 V. Defective batteries or their wiring, faulty generator, faulty fuses.
FMI 10 The supply voltage of the rear axle control unit is too low when starting the engine. Batteries or their wiring are faulty, fuses are faulty, control unit power supply wires are damaged. The control unitmay be faulty.
FMI 14 Loss of power while driving. Faulty wiring.
FMI 2 No data is transmitted between control units via the data channel. Breakage or partial damage to the data channel wiring, oxidation or damage to the contacts in the data channel connectors.
FMI 2 There is no program in the control unit or an error during the programming process.
FMI 13 The control unit has not been calibrated or the calibration has been completed with errors.
FMI 14 Invalid parameters in the control unit or an error during data transfer.
FMI 2 The rotation angle sensor or the distance sensor is faulty, the wiring between the sensors and the control unit is faulty, the control unit is faulty.
FMI 7 Faulty control unit.
FMI 12 Faulty control unit.
FMI 14 Faulty control unit.
FMI 2 The sum of the voltage values ​​between pins 38-24 and 61-24 of the rear axle control unit is less than 4.7 V. or more than 5.2 V. There is no power to the sensor, an interruption of one of the signal wires of the sensor, short circuit of the signal wires to a higher voltage or ground , short circuit of the signal wires between them or the sensor is faulty.
FMI 3 The voltage between contacts 38-24 of the rear axle control unit from the sensor is higher than 4.8 V and / or between contacts 61-24 more than 4.8 V. Short circuit of one of the voltage wires to a higher voltage or to ground, short circuit of both signal wires is faulty sensor, mechanical damage to the sensor drive.
FMI 4 The voltage between contacts 38-24 of the rear axle control unit from the sensor is less than 0.2 V and / or between contacts 61-24 is less than 0.2 V. Breakage of the signal wires, short circuit of the signal wires to a higher voltage or to ground, the sensor is faulty, mechanical damage to the drive sensor, there is no power to the sensor.
FMI 2 The sum of the voltages between pins 39-24 and 49-24 of the rear axle control unit from the sensor is less than 4.7 V. or more than 5.2 V. There is no power to the sensor, a break in the signal wire of the sensor, short circuit of the signal wires to a higher voltage or to ground, defective sensor, sensor.
FMI 3 The voltage between contacts 39-24 of the rear axle control unit from the sensor is higher than 4.8 V. and / or the voltage between contacts 49-24 is higher than 4.8 V. There is a fault between the signal wires, the sensor is faulty, the sensor is not powered, the signal wires are not closed higher voltage.
FMI 4 The voltage between contacts 39-24 of the rear axle control unit from the sensor is less than 0.2 V and / or between contacts 49-24 is less than 0.2 V. Breakage of the signal wires, short circuit of the signal wires to ground, a sensor is faulty, the sensor is not powered.
FMI 1 The voltage between pin 19 of the rear axle control unit and pin 1 of the level sensor is greater than 1.8 V. Low fluid level or damaged wiring.
FMI 3 The valve solenoid is supplied with a voltage exceeding the allowable values. Short circuit to higher voltage.
FMI 4 The valve solenoid is energized below acceptable values. Short circuit to ground.
FMI 5 Open circuit of the electromagnet of the valve.
FMI 7 The rear axle has turned very far. Faulty shut-off valve.
FMI 14 Invalid data set. Turn on the engine for more than 30 seconds, then turn off the ignition, wait at least 10 seconds, start the engine. If the DTC remains active, replace the control unit.
FMI 5 The valve is energized below the allowable values. Short circuit to ground.
FMI 0 The value from the sensor is near the limit value. Faulty or incorrectly installed sensor. The rear axle may be installed incorrectly.
FMI 7 The rotation angle of the rear axle does not match the reference values. Mechanical or hydraulic failure of the rear axle.
FMI 10 The rotation angle of the rear axle does not match the reference values. Mechanical or hydraulic failure of the rear axle.
FMI 0 The engine speed signal is higher than the allowed value. Invalid signal from the engine control unit MID128.
FMI 1 The engine speed signal is below the allowed value. Invalid signal from the engine control unit MID128.
FMI 2 The data in the messages from the engine control unit is incorrect or missing. Broken or shorted data wire. Incorrect speed signal from engine control unit.
FMI 9 The rear axle control unit does not receive messages over the data channel from the engine control unit. Open or short circuit of the data channel wires, engine control unit is disconnected from the data channel or is faulty.
FMI 0 The signal about the speed of the vehicle is above the allowed value. Invalid signal from car control unit MID144. Check the trouble codes of the vehicle control unit MID144.
FMI 1 The signal of the vehicle speed is below the allowable value. Invalid signal from car control unit MID144. Check the trouble codes of the vehicle control unit MID144.
FMI 2 The data in the messages from the car control unit is incorrect or missing. Broken or shorted data wire. Incorrect vehicle speed signal from MID144 car control unit.
FMI 9 The rear axle control unit does not receive messages over the data channel from the vehicle control unit. Open or short circuit of the data channel wires, vehicle control unit is disconnected from the data channel or faulty.
FMI 0 The signal about the speed of rotation of the wheels above the permissible value. Invalid signal from the control unit braking system MID136. Check the malfunction codes of the brake control system MID136.
FMI 1 The signal on the speed of rotation of the wheels below the permissible value. Invalid signal from the control unit braking system MID136. Check the malfunction codes of the brake control system MID136.
FMI 2 The data in the messages from the braking system control unit is incorrect or missing. Broken or shorted data wire. Wrong signal about the speed of rotation of the wheels from the control unit braking system MID136.
FMI 9 The rear axle control unit does not receive messages over the data channel from the braking system control unit. Open or short circuit of the data channel wires, the braking system control unit is disconnected from the data channel or is faulty.
FMI 0 The load signal from the pressure regulator in the air suspension is higher than the allowable value. Invalid signal from the air suspension control unit MID150. Check the trouble code of the air suspension control unit.
FMI 1 The load signal from the pneumatic suspension pressure regulator is below the allowable value. Invalid signal from the air suspension control unit MID150. Check the trouble code of the air suspension control unit.
FMI 2 The data in the messages from the air suspension control unit is incorrect or missing. Broken or shorted data wire. Incorrect load signal from MID150 air suspension control unit.
FMI 9 The rear axle control unit does not receive messages over the data channel from the air suspension control unit. Open or short circuit of the data channel wires, air suspension control unit is disconnected from the data channel or is faulty.

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