The starter does not rotate when the ignition key is turned to the appropriate position
Low battery
- Charge your battery
Jump starter terminals 30 and 50 between each other. If the starter starts, then the terminal 50 wire to the ignition switch is broken or the starter switch is faulty
- Repair the break. Replace defective parts
Broken or bad wire connection «masses» (-). Low battery
- Check wiring and contacts. Measure battery voltage. Charge it if necessary
Insufficient current conduction due to weak or oxidized contacts
- Clean the poles and battery terminals. Repair the connections between the battery, starter and «weight» (-)
No voltage at terminal 50 (traction relay)
- Wire break. Malfunction of the ignition switch and starter
The starter turns too slowly and does not crank the engine
Low battery
- Charge your battery
Insufficient current conduction due to weak or oxidized contacts
- Clean the poles and terminals of the battery, as well as the tips of the wires to the starter. Tighten the wire nuts on the starter terminals
Carbon brushes not seated on commutator, stuck in guides, worn, broken, oily or dirty
- Check carbon brushes and terminals, clean or replace. Check the carbon brush guides
Insufficient distance between carbon brushes and commutator
- Replace carbon brushes and clean carbon brush guides
The collector is worn out, burned or dirty
- Grind the collector or replace the anchor
No voltage at terminal 50 (less than 10 V)
- Check ignition switch or traction relay
Faulty traction relay
- Replace traction relay
The starter engages and turns, but the engine does not turn or turns jerkily
Faulty gear train
- Replace gear
Starter gear dirty
- Clean the gear
Damaged ring gear, flywheel
- Straighten the ring gear and, if necessary, replace the flywheel
Gear train does not disengage
Gear or screw splines dirty or damaged
- Clean the gear and replace if necessary
Faulty traction relay
- Replace traction relay
Weak or broken return spring
- Replace return spring
The starter continues to rotate even after the ignition key is released
Traction relay stuck, won't turn off
- Switch off the ignition immediately. Replace traction relay
Ignition switch won't turn off
- Disconnect the battery immediately. Replace ignition switch
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