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

4.6.4. Check of candles of an incandescence


Use of a LED sampler for check of operability of candles of an incandescence

If the light-emitting diode lights up, so the glow plug is serviceable. If the light-emitting diode does not light up, the candle is faulty, and it needs to be replaced.

Check conditions

Tension of onboard network of the car has to be not lower than 11,5 Century.

The control unit the engine has to be in the normal state.

Safety locks in a chain of giving of tension to glow plugs have to be serviceable.


1. Switch off ignition.
2. Disconnect electric sockets from incandescence candles.
3. Connect a control light-emitting diode to the positive plug of the accumulator and in turn connect the second plug of a light-emitting diode to glow plugs, see rice. Use of a LED sampler for check of operability of candles of an incandescence.
4. In the presence of the ampermeter measuring big currents connect it between the positive plug of the accumulator and contact of a glow plug. Measure the current consumed by a glow plug. If the current consumed by a candle exceeds 15 A, the glow plug means it is faulty.
5. Unscrew glow plugs.
6. Check each glow plug for existence of mechanical damages. The burned or destroyed tips of a glow plug can be from a bad stream of dispersion of fuel a nozzle. If there is such damage, it is necessary to check and, if necessary, to replace fuel nozzles.

Operability of candles of an incandescence can be checked, giving on them 12 Century. At the same time they have to heat up evenly and for the required time interval. At the same time it is necessary to observe precautions:

  – to hold a glow plug a special clip or flat-nose pliers;
  – the electric power-supply circuit of a glow plug has to have the fuse;
  – after check the glow plug has to be cooled within several minutes.

The glow plug in good shape heats up to reddening of a working tip within 5 seconds. At longer heating or heating in a middle part, but not on the end of a candle, the candle is faulty and is subject to replacement.