Vehicle fault diagnosis VAZ-21051

Possible engine malfunctions, their causes and methods of elimination
Cause Elimination Method Engine won't start No fuel in carburetor: - clogged fuel lines – wash and blow out the fuel tank, fuel lines – the fuel pump is faulty – check pump...

Possible clutch malfunctions, their causes and methods of elimination
Cause Elimination Method Incomplete clutch disengagement (clutch "leads") Increased gaps in the clutch release drive Adjust clutch release actuator Warping of the driven disk (end...

Possible malfunctions of the gearbox, their causes and methods of elimination
Cause Elimination Method Noise in gearbox Bearing noise Replace defective bearings Wear of gear teeth and synchronizers Replace worn parts Insufficient oil level in the gearbox...

Possible malfunctions of the driveline, their causes and methods of elimination
Cause Elimination Method Knocking in the driveline when starting off, during sudden acceleration or gear shifting Loosening the bolts and nuts securing the flexible coupling and...

Possible malfunctions of the rear axle, their causes and methods of elimination
Cause Elimination Method Increased noise from the rear wheels Loose wheel mount Tighten the wheel bolts Wear or destruction of the ball bearing of the axle shaft Inspect axle...

Possible suspension malfunctions, their causes and methods of elimination
Cause Elimination Method Noise and knocking in the suspension when the car is moving Defective shock absorbers Replace or repair shock absorbers Loose bolts securing the anti-roll...

Possible malfunctions of a steering, their reasons and methods of elimination
Cause Elimination Method Increased steering wheel play Loosening of bolts of fastening of a case of the steering mechanism Tighten nuts Loosening the nuts of the ball pins of the...

Possible malfunctions of the brake system, their causes and methods of elimination
Cause Elimination Method Insufficient braking performance Leakage of brake fluid from the wheel cylinders of the front or rear brakes Replace bad parts of wheel cylinders, wash...

Possible malfunctions of the body, their causes and methods of elimination
Cause Elimination Method The door opens with great effort The axis of the cracker of the door lock is bent Straighten or replace axle Door position misaligned Adjust door position...

Possible malfunctions of electrical equipment, their causes and methods of elimination
Cause Elimination Method Battery discharge while driving Alternator drive belt slip Adjust belt tension Excessive contamination of the battery surface Clean the surface of the...

Possible malfunctions of the generator, their causes and methods of elimination
Cause Elimination Method The voltmeter needle is in the red zone at the beginning of the scale Alternator drive belt slip Adjust belt tension Break in the power supply circuit of...

Possible malfunctions of the starter, their causes and methods of elimination
Cause Elimination Method When the starter is turned on, the armature does not rotate, the traction relay does not work Faulty or completely discharged battery Charge battery or...

Possible ignition malfunctions, their causes and methods of elimination
Cause Elimination Method Engine won't start Current does not pass through the breaker contacts: - dirty, oxidized or burnt contacts of the breaker; increased gap between contacts...

Possible lighting malfunctions, their causes and methods of elimination
Cause Elimination Method Individual headlights and taillights do not light up Fuses blown Check, replace fuses Burnt out lamp filaments Replace lamps Damaged wires, oxidation of...

Possible malfunctions of the windshield wiper
Cause Elimination Method The cleaner motor does not work, the bimetal fuse does not work and the fuse 2 in the mounting block does not blow The power wires of the gearmotor are...

Possible malfunctions of the heater fan motor
Cause Elimination Method Electric motor not working Damaged wires or oxidized wire connections Check and repair connections. Replace damaged wires Blown fuse 1 in the mounting...

Possible malfunctions of control devices, their causes and methods of elimination
Cause Elimination Method Instrument fuse keeps blowing Broken device protection diode Replace damaged diode The pointer of the coolant temperature gauge is constantly at the...