What problems are there in ECUs?
- Design related failures: to keep the cable runs short, many control units are housed together tightly in the engine compartment. There they are subject to fluctuating thermal and mechanical effects, as well as influences of the weather. Also material or design errors in development can lead to frequent defects in a series of units.
- Age-related problems can occur sooner or later and cause failures, depending on the quality of the used electronic components .
- Problems caused by external intervention: Bridging the vehicle, damage caused by improper measurement procedures for troubleshooting the vehicle and thus caused short circuits and power surges.
- Problems with communication (networking, data bus) and the software.
Which control units are affected very often ?
- ABS control units:
- ATE MK20 and MK60
- Bosch ABS/ESP 5.3, 5.7, 8.0
- Engine control units:
- Bosch EDC 7, EDC 14, EDC 15, EDC 16, EDC 17
- Bosch Jetronic and Motronic for Porsche, BMW, Volvo, Saab
- Bosch PLD for Mercedes
- Siemens SIMTEC 70 for Opel
- Siemens Fenix 5.1 and 5.2
- Siemens Sirius 32 / 32N
- Siemens HFS 2.0 and 2.1
- Transmission control units, TCUs:
- LUK Durashift for Ford and Mercedes
- LUK Easytronic MTA for Opel
- Temic Multitronic, Hytronic, S-Tronic for Audi
- Ignition control units:
- Bosch HKZ for Opel, Porsche, Alfa, NSU
- Convertible top control units:
- Becker for Mercedes R129
- Power Packer for Opel Astra G
- Control units for diesel pumps:
- Bosch VP44 PSG5 for many vehicle makes
- Isuzu for Opel 1,7 l diesel engines
- Instrument panels:
- Jäger for several vehicle makes
- Magneti-Marelli for several vehicle makes
- Visteon for Ford Focus
- VDO for several vehicle makes
- Yazaki Meter for Volvo V70, S60, XC70, XC90, S80
Are there vehicle types or models in which electronic problems occur frequently ?
- Passenger cars : EDC engine control units ( Bosch ) for Audi/VW, Mercedes and BMW
- Trucks : PLD engine control units for Mercedes Actros, Atego, Axor
- Motorbikes : ABS-Steuergeräte von Bosch bei BMW
- Buses : Engine control units for Mercedes engines
- Tractors : engine control units for MAN engines (Case)
What can you do if symptoms of the vehicle indicate a defective control unit?
1. A detailed error description of all symptoms or signs on the vehicle, from non-conventional driving or braking behavior over the lighting of indicator lights the way to sporadic or complete loss of certain functions. Everything which could contribute to the fault diagnosis is helpful.
2. Let a free or authorized service station read the OBDII error codes and possibly brand-specific code or read them yourself with a suitable test device. During the warranty period of your vehicle you should first contact your dealer.
3. If you suspect an electronic origin, you can dismantle your control unit or let the service station dismantle it. Send it along with the error description and error codes to EPS Elektronik to have your ECU tested or repaired if necessary. Or call us in advance to clarify whether testing and repair, a replacement unit or a new control unit is recommended.
Pictures of some control devices with frequent defects :
Engine ECU Jetronic ( Bosch ) for Volvo, BMW
Transmission control unit Automatic Mechatronic DSG DQ250 ( Temic )
ABS module MK 60 ( ATE ) for BMW, Opel,VW other vehicle makes
Instrument panel for Ford Focus and C-Max ( Visteon )
Diesel pump control unit VP44 PSG5 ( Bosch ) for Audi A4 and A6 and many other makes and models
Roof controller for Opel Astra G Cabriolet (Power Packer)
Ignition control module HKZ ( Bosch ) for Porsche 911