VW Passat B5

since 1996 release

Repair and operation of the car



Foltsvagen Passat B5
+ Maintenance instruction
+ 1. Maintenance
+ 2. Engines
+ 3. Cooling system
- 4. Fuel system
   4.2. Fuel pump / fuel level sensor
   4.3. The fuel filter on models with petrol engines
   4.4. Adjustment of a cable of an accelerator (petrol engine)
   4.5. Additional adjustment (automatic transmission)
   - 4.6. Fuel system of the diesel engine
      4.6.2. General information
      4.6.3. Check of system of preliminary heating of the diesel engine
      4.6.4. Check of candles of an incandescence
      4.6.5. Glow plugs
      4.6.6. System of heating of fuel
      4.6.7. Fuel nozzles
      4.6.8. Main malfunctions of a control system of the engine
+ 5. Engine management
+ 6. Exhaust system
+ 7. Transmission
+ 8. Running gear
+ 9. Steering
+ 10. Brake system
+ 11. Body
+ 12. Heating, ventilation
+ 13. Electric equipment







4.6.8. Main malfunctions of a control system of the engine

GENERAL INFORMATION

Before definition of malfunctions be convinced that fuel is available in the fuel tank in enough, the engine has no mechanical defects, the accumulator is charged and the starter turns a bent shaft of the engine with a sufficient speed, the system of preliminary heating of the engine is serviceable, the fuel system is tight and in it there are no pollution, a hose of ventilation of a case pure and the tire of grounding of the power unit is reliably connected.

Previously check the malfunctions which are written down in memory of a control system of the engine.
REASON
ELIMINATION METHOD
The complicated start of the engine or the engine is not started absolutely
The system of preliminary warming up of the diesel engine does not work Check and, if necessary, restore operability of system of preliminary heating of the diesel engine.
The fuel cut-off valve does not open Check the control unit fuel cut-off valve the engine, and also anticreeping system.
Defect in a fuel supply system Check a fuel supply system to the engine.
Pipelines of supply of fuel are untight, blocked inside or deformed Clean, and if necessary, replace fuel supply pipelines.
The fuel filter is polluted Replace the fuel filter.
In winter time at the fuel filter there is water or ice Warm up the car in the heated garage.
Ventilation of the fuel tank is hammered or the fuel filter located in the fuel tank is polluted Clean system of ventilation of the fuel tank or the fuel filter.
The fuel injection moment is incorrectly adjusted Check and if necessary adjust the fuel injection moment.
Fuel nozzles are faulty Check operability of fuel nozzles.
The fuel pump of high pressure is faulty Replace the fuel pump of high pressure.
The engine works only at idling turns
Fastening of fuel hoses on the fuel pump of high pressure or on the fuel filter is weakened Fix fuel hoses as appropriate.
The giving and returnable fuel hoses on the fuel pump of high pressure are incorrectly connected Check correctness of connection of fuel hoses.
The increased fuel consumption
The fuel filter is polluted Replace the fuel filter.
The fuel system is untight Check tightness of fuel system.
The fuel return pipeline is polluted Clean the fuel return pipeline.

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