8.12.4. Possible malfunctions of control devices, their reasons and methods of elimination
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Cause of defect
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Elimination method
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Constantly the safety lock of devices fuses
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The diode of protection of devices is punched
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Replace the damaged diode
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The arrow of the index of temperature of cooling liquid constantly is in the beginning of a scale
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1. The device is damaged
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1. Replace the device or a combination
devices
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2. The device sensor is faulty
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2. Replace the sensor
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3. Wires are damaged or oxidized
their tips
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3. Check wires, restore
connections
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The arrow of the index of temperature of cooling liquid constantly is in a red zone
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1. The device is damaged
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1. Replace the device or a combination
devices
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2. The device sensor is faulty
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2. Replace the sensor
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3. The wire going to the sensor will be closed
on weight
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3. Check, eliminate short circuit
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The arrow of the index of level of fuel constantly is in the beginning of a scale
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1. The device is damaged
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1. Replace the device or a combination
devices
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2. Wires are damaged or oxidized
their tips
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2. Check wires, restore
connections
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3. The sensor is damaged:
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3. Do the following:
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a) break of the flexible tire of the sensor
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a) solder the tire or replace the sensor
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b) break of a winding of the resistor
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b) replace the sensor
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c) weak contact of a slip ring
resistor
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c) turn in contact
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d) the float is untight
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d) replace a float
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The arrow of the index of level of fuel constantly is in the end of a scale
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1. The device is damaged
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1. Replace the device
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2. The flexible tire of the sensor is closed with
fuel intake tube
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2. Unbend the tire
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3. Wire of connection with the sensor
it is closed on weight
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3. Check, eliminate short circuit
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The arrow of the index of level of fuel comes back by the beginning of a scale at a full tank
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The limiter is incorrectly installed
the float course (the winding comes to an end
resistor)
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Turn in the limiter
on 1-2 mm down
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The arrow of the index of level of fuel moves jumps and often falls by the beginning of a scale
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1. Weak contact of the resistor of the sensor
slip ring
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1. Turn in a slip ring
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2. Break of a winding of the resistor of the sensor
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2. Replace the sensor
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Constantly the control lamp of a reserve of fuel burns
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1. Short circuit of a wire of the sensor with a weight
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1. Check, eliminate short circuit
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2. Short circuit of the flexible tire of the sensor with
fuel intake tube
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2. Unbend the tire
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Any control lamps do not work
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1. The lamp fused
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1. Replace a lamp
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2. Bad contact of a lamp in the boss
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2. Restore contact
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3. Contacts of the sensor were oxidized
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3. Smooth out contacts of the sensor
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4. The lamp sensor is faulty
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4. Replace the sensor
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5. Break in wires, oxidation of tips of wires
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5. Replace the damaged wires, smooth out tips
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The control lamp of pressure of oil burns constantly or dies away only at big turns of the engine
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1. Low pressure of oil
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1. Check the engine
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2. Short circuit of a wire of the sensor on weight
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2. Check, eliminate short circuit
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3. The sensor is faulty
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3. Replace the sensor
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The speedometer does not work
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1. Nuts of fastening of tips of a flexible shaft of the drive are not tightened
speedometer
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1. Check, tighten nuts
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2. Break of a flexible shaft of the drive
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2. Replace a flexible shaft
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3. The speedometer mechanism is damaged
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3. Replace a speedometer or
combination of devices
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Noise of a flexible shaft of the drive of a speedometer
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1. The cover of a flexible shaft of the drive (dents, excesses, etc.) is deformed
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1. Replace a flexible shaft
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2. Installation of a flexible shaft is executed with
bend radiuses less than 100 mm
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2. Correct installation of a flexible shaft
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