Opel Omega

since 1993-1999 release

Repair and operation of the car

Opel Omega
+ 1. Maintenance instruction
+ 2. Maintenance
+ 3. Repair of engines
+ 4. Heating system and ventilation
- 5. Fuel, exhaust systems
   + 5.1. Petrol engines
   + 5.2. 2,0 liters diesel engine
   - 5.3. Diesel V6 engine of 2,5 liters
      5.3.1. Principle of operation of the diesel engine
      5.3.2. Turbocompressor
      5.3.3. System of recirculation of the fulfilled gases (EGR system)
      5.3.4. Device of preheat of diesel engines
      5.3.5. System prednakala/glow plugs
      5.3.6. Relay of system of preheat
      5.3.7. Removal of air from a power supply system
      5.3.8. Fuel Pump of High Pressure (FPHP)
      5.3.9. Nozzles
      5.3.10. Check / adjustment began giving of TNVD
      5.3.11. Inlet collector
      5.3.12. Main malfunctions of diesel system of injection
      5.3.13. System of production of the fulfilled gases of diesel engines
+ 6. System of start of the engine
+ 7. System of ignition
+ 8. Coupling
+ 9. Transmissions
+ 10. Main transfer, half shafts
+ 11. Brake system
+ 12. Suspension bracket and steering
+ 13. Body
+ 14. Body electric equipment

5.3.6. Relay of system of preheat



1. Relay of system of preheat

2. DDE monitor

Scheme of the relay of preheat

Cover of plugs

The corresponding arrangement of plugs is on a relay cover for system of preheat.


1. Remove a casing from electronics module about the battery.
2. Press the holder's latches by means of the screw-driver and take out the relay of system of preheat.
3. Check a strip safety lock 80 A about the connecting plug, in case of malfunction replace.
4. In advance find the reasons of an overload and eliminate.
5. Unscrew a thick positive cable from the relay case.
6. Connect the battery and check tension between the plug 15 and weight.
7. Include ignition. The light-emitting diode in the device of control of tension has to light up, otherwise check transfer of tension in the ignition lock.
8. If the light-emitting diode lit up, check whether conducting to glow plugs fused, if necessary replace.
9. Otherwise replace the relay.
10. Establish a monitor casing.