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Repairs ACU / Repairs
MID185 APM Volvo Air Dryer Dry er Control Co ntrol Units
Interpretation of diagnostic codes of malfunctions of control units of air dryers MID185 APM Volvo. Possible fault conditions - FMI field
- FMI 0: Data is reliable, but is above the norm; - FMI 1: Data is reliable, but is below normal; - FMI 2: Incorrect data; - FMI 3: A short to high or short circuit; - FMI 4: Short to low voltage or low voltage circuit; - FMI 5: Open circuit or low current; - FMI 6: Current is above normal or the circuit is shorted to ground; - FMI 7: Incorrect mechanical response;
- FMI 8: Invalid pulse frequency; - FMI 9: Incorrect update frequency; - FMI 10: Large fluctuations; - FMI 11: Unknown fault; - FMI 12: Component defective; - FMI 13: Incorrect calibration value; - FMI 14: Special instructions; - FMI 15: Reserve for future use. Restarting the control unit air dryer MID185
The car is standing still. 1. 2. 3. 4. 5. 6. 7.
Switch off the ignition, wait at least 10 seconds f or the control unit to reset data; Disconnect the power from the batteries to the main switch or remove the terminals; Power on; Ignition ON; Delete fault codes; Start the engine; If the DTC remains active, turn off the i gnition, turn off the power from the batteries for at least 30 seconds before taking further action.
MID 185 PID 70 Parameter: Parking brake status Fault: FMI 0 The pressure in the power accumulator is above 10 Bar. Defective air dryer control unit (installed inside the air dryer) is faulty. Replace air dryer. FMI 2 The signal value of the air pressure sensor in the accumulator is outside the allowable limits (the pressure sensor is installed inside the air dryer). Defective air dryer control unit. Replace air dryer.
MID 185 PID 84 Parameter: Car speed Fault: FMI 2 The driving speed signal received from the MID144 vehicle control unit is incorrect or missing. Breakage or partial damage to the SAE J1587 / J1708 data channel wiring. Damaged or oxidized pins in connectors. Perhaps faulty vehicle control unit.
MID 185 PID 93 Parameter: Torque Fault: FMI 2 The signal received from the engine control unit MID128 is incorrect or missing. Breakage or partial damage to the SAE J1587 / J1708 data channel wiring. Damaged or oxidized pins in connectors. The engine control unit may be faulty.
MID 185 PID 190 Parameter: Engine speed Fault: FMI 2 The signal received from the engine control unit MID128 is incorrect or missing. Breakage or partial damage to the SAE J1587 / J1708 data channel wiring. Damaged or oxidized pins in connectors. The engine control unit may be faulty.
MID 185 PID 245 Parameter: Mileage information Fault: FMI 2 The signal received from the dashboard control unit MID140 is incorrect or missing. Breakage or partial damage to the SAE J1587 / J1708 data channel wiring. Damaged or oxidized pins in connectors. Perhaps faulty control unit dashboard. Check for the presence of fault codes for dashboard control units.
MID 185 PID 252 Parameter: date Fault: FMI 2 The signal received from the dashboard control unit MID140 is incorrect or missing. Breakage or partial damage to the SAE J1587 / J1708 data channel wiring. Damaged or oxidized pins in connectors. Perhaps faulty control unit dashboard. Check for the presence of fault codes for dashboard control units.
MID 185 SID 229 Parameter: Downshift switch Fault: FMI 2 The signal coming from the car control unit MID144, incorrect or absent. Breakage or partial damage to the SAE J1587 / J1708 data channel wiring. Damaged or oxidized pins in connectors. Perhaps faulty vehicle control unit.
MID 185 SID 230 Parameter: Idle switch № 1 accelerator pedal
Fault: FMI 2 The signal coming from the car control unit MID144, incorrect or absent. Breakage or partial damage to the SAE J1587 / J1708 data channel wiring. Damaged or oxidized pins in connectors. Perhaps faulty vehicle control unit.
MID 185 SID 231 Parameter: SAE J1939 data feed Fault: FMI 2 Signals by which the air dryer unit and other control units c ommunicate with each other over an SAE J1939 data channel are out of range or absent. Breakage of wiring, damage to the contacts in the data channel connectors SAE J1939
MID 185 SID 233 Parameter: Control unit 2 Fault: FMI 2 Incorrect internal calculations. Defective air dryer control unit. FMI 8 Incorrect self test results. Defective air dryer control unit. FMI 12 Internal control unit malfunction.
MID 185 SID 240 Parameter: Program memory Fault: FMI 2 Invalid checksum value. Error in the program or incorrectl y programmed parameters. Perform reprogramming. If the fault persists, replace the air dryer. FMI 8 Invalid checksum value. Error in the program. Try restar ting MID185. FMI 9 Malfunction of the internal memory of the air dryer control unit or incorrectly programmed parameters. Try restarting MID185. perform reprogramming. If the fault persists, replace the air dryer. FMI 10 Incorrectly programmed parameters in the air dryer control unit. Try restarting MID185. perform reprogramming. If the fault persists, replace t he air dryer. FMI 11 Incorrectly programmed parameters in the air dryer control unit. Try restarting MID185. Perform reprogramming. If the fault persists, replace the air dryer. FMI 12 Air dryer control unit faulty. Replace air dryer. FMI 14 Air dryer control unit faulty. Replace air dryer.
MID 185 SID 246 Parameter: Brake pedal switch Fault: FMI 2 The signal from the MID136 braking system control unit is incorrect or missing. Breakage or partial damage to the SAE J1587 / J1708 data channel wiring. Damaged or oxidized pins in connectors. The brake control unit MID136 or the car control unit MID144 may be faulty.
MID 185 SID 251 Parameter: Power supply control unit air dryer Fault: FMI 0 High voltage between power contact 3 and ground 4 at the air dr yer connector. Possible generator malfunction. Try restarting MID185. FMI 1 Low voltage between power contacts 3 or 1 and ground 4 at the dehumidifier connector. A short to earth on the power supply wires is possible. Try restarting MID185. FMI 5 Break of power wires to the contacts of the air dryer 3 or 1, break of the ground wire to the contact of the air dryer 4. One of the fuses F8 or F47 has blown out. Try restarting MID185.
MID 185 SID 252 Parameter: Calibration control unit Fault: FMI 14 The control unit is in self-test mode. Try restarting MID185.
MID 185 SID 253 Parameter: Gauge EEPROM Memory Fault: FMI 2 Invalid checksum value at the start of operation. Parameters in the air dryer control unit are incorrectly programmed. Try restarting MID185. Perform reprogramming. FMI 6 Internal fault in the air dryer control unit. Try restarting MID185. Perform reprogramming. If the fault persists, replace the air dryer. FMI 7 Invalid checksum value at the beginning of work. Parameters in the air dryer control unit are incorrectly programmed. Try restarting MID185. Perform reprogramming.
FMI 12 Internal fault in the air dryer control unit. Try restarting MID185. Perform reprogramming. If the fault persists, replace the air dryer. FMI 13 Internal fault in the air dryer control unit. Try restarting MID185. Perform reprogramming. If the fault persists, replace the air dryer. FMI 14 Internal fault in the air dryer control unit. Try restarting MID185. Perform reprogramming. If the fault persists, replace the air dryer.
MID 185 SID 254 Parameter: Control unit 1 Fault: FMI 2, 10, 11, 12 Internal malfunction in the air dryer control unit. Try restarting MID185. Perform reprogramming. If the fault persists, replace the air dryer.
MID 185 PPID 55 Parameter: Control unit temperature Fault: FMI 2 The sensor signal of the internal temperature of the air dryer control unit is out of tolerance. Defective air dryer control unit. Replace air dryer. FMI 10 Block temperature below -48 degrees or above +93 degrees. Extreme weather conditions or defective temperature sensor. Restart MID185 at an ambient temperature of 20 degrees. If the code remains active, replace the air cleaner.
MID 185 PPID 258 Parameter: Engine speed control Fault: FMI 2 The signal received from the engine control unit MID128 is incorrect or missing. Breakage or partial damage to the data channel wiring. Damaged or oxidized pins in connectors. The engine control unit may be faulty.
MID 185 PPID 294 Parameter: Air pressure in the parking brake circuit Fault: FMI 8 The pressure in the parking brake circuit increases, even with the solenoid valve activated. Air ingress from trailer circuit or defective air dryer. Try to completely empty and fill the pneumatic system. Try restarting MID185. FMI 9 The circuit of the parking brake is not completely filled for a certain period of time. Leaks in the parking brake or trailer cir cuit are blocked or partially blocked. Try to completely empty and fill the pneumatic system. Try restartin g MID185.
FMI 12 Air pressure in the parking brake circuit or trailer circuit is lower than 4.5 bar at speeds above 10 km / h. Leaks in the parking brake or trailer circuit are blocked or partially blocked. Try to completely empty and fill the pneumatic system. Try restarting MID185.
MID 185 PPID 295 Parameter: Fixed neutral position Fault: FMI 2 The signal from MID144 vehicle control unit is incorrect or missing. Breakage or partial damage to the SAE J1587 / J1708 data channel wiring. Damaged or oxidized pins in connectors. Perhaps faulty vehicle control unit.
MID 185 PPID 305 Parameter: Front circuit of the main brake system Fault: FMI 0 The pressure in the front loop is above 14 Bar, at a speed of more than 10 km / h. Defective air dryer. Try to completely empty and fill the pneumatic system. Try restarting MID185. FMI 12 The pressure in the front loop is below 4.5 Bar, at a speed exceeding 10 km / h. The elements of the front contour are leaking or partially clogged. Try restarting MID185.
MID 185 PPID 306 Parameter: Rear side of the main brake system Fault: FMI 0 The air pressure in the rear loop is 1.5 bar higher. automatic shutdown pressure. Defective air dryer. Try to completely empty and fill the pneumatic system. Try restarting MID185. FMI 12 The pressure in the rear loop is below 4.5 Bar, at a speed of more than 10 km / h. The elements of the rear contour are leaking or partially clogged. Try restarting MID185.
MID 185 PSID 1 Parameter: Main solenoid valve Fault: FMI 3, 5 Internal malfunction in the air dryer control unit. Replace air dryer.
MID 185 PSID 2 Parameter: Safety valve
Fault: FMI 3, 5 Internal malfunction in the air dryer control unit. Replace air dryer.
MID 185 PSID 3 Parameter: Valve restoring Fault: FMI 3, 5, 6, 7, 8, 9 For FMI 8, first check the integrity of the wiring of the data channels SAE J1939 and SAE J1587. Internal malfunction in the air dryer control unit. Replace air dryer.
MID 185 PSID 4 Parameter: Blocking valve Fault: FMI 3, 5, 6, 7, 8, 9 For FMI 8, first check the integrity of the wiring of the data channels SAE J1939 and SAE J1587. Internal malfunction in the air dryer control unit. Replace air dryer.
MID 185 PSID 5 Parameter: Drive, heating Fault: FMI 3 Short circuit of the power supply of the air dryer to battery positive or defective air dryer. FMI 5 Internal fault in the air dryer control unit. Replace air dryer. FMI 6 Internal fault in the air dryer control unit. Replace air dryer. FMI 7 Internal fault in the air dryer control unit. Replace air dryer. FMI 9 Internal fault in the air dryer control unit. Replace air dryer. FMI 13 The parameters in the air dryer control unit are incorrectly programmed. Try restarting MID185. Perform reprogramming. If the fault persists, replace the air dryer.
MID 185 PSID 6 Parameter: Air pressure sensor in the front brake circuit Fault: FMI 2 Signals from the air pressure sensor in the front loop have values that go beyond normal limits. Defective air dryer control unit.
FMI 10 High differential pressure in the front and rear circuits. Air leakage in one of the circuits. Try restarting MID185.
MID 185 PSID 7 Parameter: Air pressure sensor in the rear brake circuit Fault: FMI 2 Signals from the air pressure sensor in the rear loop have values that go beyond normal limits. Internal malfunction in the air dryer control unit. Replace air dryer.
MID 185 PSID 8 Parameter: Air pressure sensor in the parking brake circuit Fault: FMI 2 The signals from the air pressure sensor in the parking brake circuit have values that go beyond normal limits. Internal malfunction in the air dr yer control unit. Replace air dryer.
MID 185 PSID 10 Parameter: Solenoid valve setting Fault: FMI 13 Internal fault in the air dryer control unit. Replace air dryer.
MID 185 PSID 11 Parameter: Setting pressure sensors Fault: FMI 13 Internal fault in the air dryer control unit. Replace air dryer.
MID 185 PSID 13 Parameter: Pressure limiter Fault: FMI 2 High air pressure in the parking brake circuit and trailer brake circuit. Pressure above 10 bar. The air dryer control unit is faulty. Try restartin g MID185.
MID 185 PSID 19 Parameter: Air dryer filter element Fault: FMI 0 Pressure not supported 12.5 Bar. Air leaks in t he vehicle or trailer system, the compressor is faulty, the air line between the compressor and the air dryer is blocked.
The air dryer element is completely filled with moisture. Possible defective air dryer. First replace the filter element. Try restarting MID185. MID 185 PSID 20 Parameter: Air dryer filter element. Fault: Compressor shutdown pressure 12.5 bar. not achieved for a long time. Air leaks in the vehicle or trailer system, the compressor is faulty, the air line between the compressor and the air dryer is blocked. The air dryer element is completely filled with moisture. Possible defective air dryer. First replace the filter element. Try restarting MID185. MID 185 PSID 21 Parameter: Large amounts of condensate in the brake system Fault: FMI 0 Compressor shutdown pressure 12.5 bar. not achieved for a long time. Air leaks in the vehicle or trailer system, the compressor is faulty, the air line between the compressor and the air dryer is blocked. The air dryer ele ment is completely filled with moisture. Possible defective air dryer. First r eplace the filter element. Try restarting MID185.
MID 185 PSID 22 Parameter: Compressor activation Fault: FMI 0 Pressure not supported 12.5 Bar. Air leaks in the vehicle or trailer system, the compressor is faulty, the air line between the compressor and the air dryer is blocked. The air dryer element is completely filled with moisture. Possible defective air dryer. First replace the filter element. Try restarting MID185.
MID 185 PSID 30 Parameter: Air pressure in the brake system Fault: FMI 0 The pressure in the discharge phase is higher by more than 0.5 Bar. The air dryer control unit may be faulty. Try restarting MID185. FMI 1 The air pressure in the brake system is below normal. Air leaks f rom the brake system. The actual air pressure in the brake system is different from the pressure measured by the air dryer control unit. Try restarting MID185. FMI 2 Internal fault in the air dryer control unit. Replace air dryer.
MID 185 PSID 200 Parameter: Communication failure by SAE J1939 data link wit h MID128 engine control unit Fault:
FMI 9 The MID185 air dryer control unit does not receive signals from the engine control unit MID128 via data channel SAE J1939. Broken or partial damage to the wires of the data channel. Between the blocks. The engine control unit may be faulty.
MID 185 PSID 201 Parameter: Communication failure by SAE J1939 data link wit h MID144 vehicle control unit Fault: FMI 9 The MID185 air dryer control unit does not receive si gnals from the car control unit MID144 via data channel SAE J1939. Broken or partial damage to the wires of the data channel. Between the blocks. Perhaps faulty vehicle control unit.
MID 185 PSID 202 Parameter: Communication failure by SAE J1939 data link wit h dashboard control unit MID140 Fault: FMI 9 The MID185 air dryer control unit does not receive signals over the SAE J1939 data channel from the MID140 dashboard control unit for 5 seconds. Broken or partial damage to the wires of the data channel. Between the blocks. Perhaps faulty control unit dashboard.
MID 185 PSID 203 Parameter: Communication failure by SAE J1939 data link with dashboard control unit MID140 Fault: FMI 9 The MID185 air dryer control unit does not receive si gnals via the SAE J1939 data channel from the MID140 dashboard control unit for 50 seconds. Broken or partial damage to the wires of the data channel. Between the blocks. Perhaps faulty control unit dashboard.
MID 185 PSID 204 Parameter: Communication violation by data channel SAE J1939 with braking s ystem control unit MID136 Fault: FMI 8 Conflict signals from the control unit of the air dryer MID185 and the control unit of the braking system MID136. Broken or partial damage to the wires of t he data channel. Between the blocks. Perhaps defective control unit braking system. FMI 9 Broken or partial damage to the data channel wires. Between blocks. Perhaps defective control unit braking system.
MID 185 PSID 205 Parameter: Communication failure by SAE J1939 data link wit h MID130 transaxle control unit Fault:
FMI 9 The MID185 air dryer control unit does not receive signals from the MID136 gearbox control unit via data channel SAE J1939. Broken or partial damage to the wires of the data channel. Between the blocks. The gearbox control unit may be faulty.
MID 185 PSID 208 volvo , trouble codes
