Mercedes W124

since 1985-1995 of release

Repair and car operation



W124 Mercedes
+ Governing bodies and control devices
+ MAINTENANCE
+ 2. Maintenance (diesel engines)
+ ENGINE
+ 4. Repair of 6-cylinder petrol SOHC engines
+ 5. Repair of 6-cylinder petrol DOHC engines
+ 6. Repair of the diesel engine established in the car
+ 7. Major maintenance of engines
+ COOLING SYSTEM
+ FUEL SYSTEM
+ 10. System of injection of BOSCH CIS-E fuel (KE-JETRONIC)
- 11. System of injection of BOSCH HFM fuel
   11.2. General information
   11.3. Accelerator cable
   11.4. Air filter
   11.5. Casing of the air filter
   11.6. Fuel filter
   11.7. Fuel level sensor
   11.8. Fuel pump
   11.9. Fuel tank
   11.10. Throttle case
   11.11. Inlet collector
   - 11.12. Elements of system of injection of BOSCH HFM fuel
      11.12.2. The sensor of temperature of cooling liquid
      11.12.3. Lambda sensor
      11.12.4. Electronic control device (ECU)
      11.12.5. Fuel nozzles and fuel highway
      11.12.6. Regulator of pressure of fuel
   11.13. Pressure removal in fuel system
   11.14. Adjustment of turns of idling and the contents WITH in exhaust gases
+ 12. Fuel system of diesel engines
+ 13. Fuel system of diesel engines
+ SYSTEMS OF START, IGNITION
+ 15. System of ignition of 4-cylinder petrol engines
+ 16. System of ignition of four-cylinder petrol engines
+ PRESTARTING HEATING
+ TRANSMISSION
+ 19. Mechanical transmission
+ 20. Automatic transmission
+ POWER SHAFTS
+ BRAKE SYSTEM
+ SUSPENSION BRACKET
+ BODY
+ ELECTRIC EQUIPMENT
+ CHECK OF MALFUNCTIONS






11.12.4. Electronic control device (ECU)

GENERAL INFORMATION

Prevention

The electronic control device (ECU) has the details sensitive to a static electricity therefore at a detachment электричес ky sockets from the block (ECU) do not touch by hands or instruments of contacts of the socket as thus it is possible to damage ECU block elements. At work with the ECU block remove from a body a static electricity, having concerned the earthed metal subjects. Disconnect electric sockets from the ECU block only for a while, necessary for repair.


Removal

PERFORMANCE ORDER
1. The ECU block is located behind a partition of a motor compartment at the accumulator.
2. Remove a weight wire from the accumulator.
3. Press spring clamps and disconnect the multicontact electric socket from the electronic control device.
4. Take a fixing core, unscrew screws and remove the block of the electronic control device. On models with anti-blocking system previously it is necessary to remove the control unit anti-blocking system.

Installation

PERFORMANCE ORDER
1. Installation is made in sequence, return to removal.