Mercedes S-class W202

1993-2000 of release

Repair and car operation

14.1.9.1. Diagnostics of malfunctions of a starter

THE GENERAL DATA

If the starter is not turned, first of all, check up, whether there are on the plug 50 traction relays pressure necessary for retraction – not less 8В. If the specified pressure arrives, it is necessary to check up under the electroscheme of a line which concern an electric chain of a starter. Whether the starter in the presence of full pressure of the storage battery is involved, it is possible to check up as follows:

 – Do not include any transfer, include ignition;
 – зашунтируйте a wire (cross-section section not less than 4 мм²) plugs 30 and 50 on a starter, see also the electroscheme the Electric equipment – a starter, the generator, the accumulator (a DB 111 HFM/PMS).

If thus the starter is normally started, malfunction consists in the wires going to a starter. In this case check up a starter in the removed condition.

Check condition: it is necessary to screw down connections, and they should not be oxidised.

THE REASON	WAY OF ELIMINATION
The starter does not rotate at actuating of the switch of ignition and a starter
The storage battery is discharged	Charge the storage battery.
The line 50 going to the switch of ignition and a starter is broken off, the starter switch is faulty	Eliminate rupture, replace faulty details.
The wire or connection on the case is broken off; the storage battery is discharged	Check up wires of the storage battery and connection, measure pressure of the storage battery, if necessary charge it.
Insufficient passage of a current owing to the loosened or oxidised connections	Clear poles and plugs of the storage battery.
There is no pressure on the plug 50 (the traction relay)	Restore the connections protected by safety locks between the storage battery, a starter and the car case.
The starter rotates too slowly and does not start the engine
The storage battery is discharged	Charge the storage battery.
In the engine there is no winter motor or all-weather oil	Fill in all-weather oil.
Insufficient passage of a current owing to the weakened or oxidised connections	Clear poles and plugs of the storage battery and clear connections on a starter, hardly tighten connections.
Coal brushes do not adjoin to a collector, plugs in the contact surfaces are worn out, broken off, made oily or polluted	Check up, clear or replace coal brushes, check up contact surfaces.
Insufficient interval between coal brushes and a collector	Replace coal brushes and clear contact surfaces of coal brushes.
The collector is scratched or has scorched and is polluted	Grind a collector or replace an anchor.
On the plug 50 there is no pressure (a minimum 8)	Check up the ignition and starter switch or the traction relay.
The traction relay is faulty	Replace the traction relay.
The starter is started and involved, the engine shaft does not rotate or rotates only pushes
Transfer is faulty шестеренчатая	Replace шестеренчатую transfer.
The gear wheel is polluted	Clear a gear wheel.
The gear rim on a flywheel is faulty	Finish a gear rim if it is required, replace a flywheel.
Transfer does not work шестеренчатая
Transfer or abrupt carving are polluted or faulty шестеренчатая	Clear шестеренчатую transfer, if necessary replace it.
The traction relay is faulty	Replace the traction relay.
The returnable spring is weakened or broken off	Restore a returnable spring.
The starter continues to work after the ignition key has been switched off
The traction relay hangs, is not disconnected	Immediately switch off ignition, replace the traction relay.
The lock-switch of ignition and devices is not disconnected	Immediately disconnect wires from plugs of the storage battery, replace the lock-switch of ignition and devices