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
+ 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
   22.2. General information
   22.3. Pumping of hydraulic brake system
   22.4. Brake pipelines and hoses
   + 22.5. Replacement of forward brake shoes
   22.6. Replacement of back brake shoes
   22.7. Forward brake disk
   22.8. Back brake disk
   22.9. Forward brake support
   + 22.10. Support repair
   22.11. Back brake support
   22.12. Main brake cylinder
   22.13. Vacuum amplifier of brakes
   22.14. Unilateral valve of the vacuum amplifier of brakes
   22.15. Adjustment of the parking brake
   22.16. Brake shoes of the parking brake
   22.17. Pedal of the parking brake
   22.18. Cables of the parking brake
   22.19. Stoplight switch
   22.20. Anti-blocking system (ABS)
   - 22.21. Elements of anti-blocking system
      22.21.1.2. Electronic control device (ECU)
      22.21.1.3. Sensor of a forward wheel
      22.21.1.4. Sensor of a back wheel
      22.21.1.5. Gear rotor of sensors of wheels
      22.21.1.6. Relay
      22.21.2. Models with a control system of speed of movement of the car (ASR)
      22.21.2.2 ASR system pump
      22.21.2.3 Pressure accumulator
      22.21.2.4 Electronic control device (ECU)
      22.21.2.5 Sensor of a forward wheel
      22.21.2.6 Sensor of a back wheel
      22.21.2.7 Gear rotor of sensors of wheels
      22.21.2.8 Relay
   22.22. The vacuum pump on models with diesel engines
+ SUSPENSION BRACKET
+ BODY
+ ELECTRIC EQUIPMENT
+ CHECK OF MALFUNCTIONS






22.21.1.6. Relay

PROTECTION RELAY

Removal

PERFORMANCE ORDER
1. The relay of protection is located near the electronic control device (ECU). Before removal of the relay check that ignition is switched off.
2. Unscrew the fastening screw, extend the relay from a nest and take it from a motor compartment.

Installation

PERFORMANCE ORDER
1. Check a condition of connecting contacts of the relay of protection on the relay and in a nest of installation of the relay.
2. Installation is made in sequence, return to removal.

RELAY OF ANTI-BLOCKING SYSTEM

Removal

Unscrewing of the screw, the relay fixing a cover on the hydraulic device

Removal of a cover of the relay from the hydraulic device

Arrangement of the relay of the electromagnetic valve (1) and relay of the returnable pump (2) of anti-blocking system of brakes

PERFORMANCE ORDER
1. Unscrew the screw and remove from the hydraulic device a relay cover (see fig. Unscrewing of the screw, the relay fixing a cover on the hydraulic device, Removal of a cover of the relay from the hydraulic device)
2. Check that ignition is switched off and take the demanded relay from the control unit. The relay of the electromagnetic valve is less on the size, than the relay of the returnable pump (see fig. Arrangement of the relay of the electromagnetic valve and relay of the returnable pump of anti-blocking system of brakes).