Peugeot 406

since 1996 release

Repair and operation of the car

Peugeot 406
+ 1. Maintenance instruction
+ 2. Maintenance
+ 3. Engine
+ 4. Cooling systems, heating and ventilation
+ 5. Fuel system
- 6. System of ignition
   - 6.1. Systems of start and charging
      6.1.1. Accumulator
      6.1.2. System of charging
      6.1.3. Generator of alternating current
      6.1.4. System of start of the engine
      6.1.5. Starter
      6.1.6. Oil pressure sensor
      6.1.7. Oil level sensor
   + 6.2. System of ignition (petrol engines)
   + 6.3. System of prestarting heating (diesel engines)
+ 7. Coupling
+ 8. Transmissions
+ 9. Power shafts
+ 10. Brake system
+ 11. Suspension bracket and steering
+ 12. Body
+ 13. Electric equipment
+ 14. Main malfunctions

6.1.1. Accumulator


It is necessary to make check of density of electrolyte in the accumulator each 3 months to define load ability of the accumulator.

Check is made by the densitometer. When determining density of electrolyte it is necessary to consider accumulator temperature. At a temperature of electrolyte below 15 °C on everyone 10 ° less than this temperature subtract value 0,007 from the measured density. For everyone 10 ° over 15 ° add 0,007.

Electrolyte density in the accumulator

It is above 25 °C
It is below 25 °C
Full charge
1,210 – 1,230
1,270 – 1,290
Charging for 70%
1,170 – 1,190
1,23 – 1,250
1,050 – 1,070
1,110 – 1,130

Measure density of electrolyte in each can. The difference in density 0,04 or more between two any banks indicates loss of electrolyte or sulphation of plates.

If electrolyte density between two any banks differs more, than on 0,04, the accumulator is subject to replacement. If density of electrolyte is lower demanded, but identical in all banks, the accumulator needs to be charged.

In case of use of the unattended accumulator the condition of the accumulator can be checked only the voltmeter.

In accumulators with the built-in indicator of degree of state of charge the condition of the accumulator is determined by color of the indicator. Green color of the indicator corresponds to a full charge of the accumulator. Black color of the indicator indicates the need of accumulator charging. Blue color of the indicator testifies to the low level of electrolyte in the accumulator.


Accumulator charging has to be made when the accumulator is removed from the car.

1. You make accumulator charging charging current from 3,5 to 4 amperes until electrolyte density in the accumulator does not increase within 4 hours.
2. Use of big currents for bystry accumulator charging is not recommended since in this case there can be a buckling of plates because of an overheat.
3. During accumulator charging temperature of electrolyte should not exceed 37,8 °C.


1. The accumulator is located on the forward left side of a compartment of the engine. Uncover the rechargeable battery, weaken the negative plug of the accumulator and remove it.
2. Disconnect the positive plug and remove it.
3. Unscrew two bolts and remove a clip of fastening of the accumulator.
4. Take the accumulator from a motor compartment.
5. To remove a box for the accumulator, remove the case of the air filter.
6. On models with the conditioner unscrew the screw of fastening of a belt of a moisture separator to a forward part of a box of the accumulator (it is specified by an arrow).
7. Unscrew internal bolts (are specified by shooters) fastenings of a box for the accumulator to the metal basis.
8. Unscrew also one external bolt (it is specified by an arrow) fastenings to a suspension bracket of installation of the air filter.
9. Move all wires and hoses aside and take a box for the accumulator from a motor compartment.


1. Installation is made in the sequence, the return to removal.
2. After connection of plugs to the accumulator grease them with technical vaseline.
3. After connection of the accumulator include ignition for 10 seconds before start of the engine. It will allow electronic systems and to control units to enter an operating mode.