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18:25. Diagnostics of malfunctions of system of start-up and methods of their elimination

Symptoms of malfunctions

1
The starter does not turn a bent shaft of the engine
2
The starter engine quickly rotates
3
The bent shaft of the engine rotates slowly
4
The control lamp of charging burns at the working engine
5
The discharged rechargeable battery
6
Admissions of ignition

The starter does not turn a bent shaft of the engine
STEP
CHECK
 
ELIMINATION METHOD
1
Check whether the bent shaft of the engine at completely charged rechargeable battery is turned
Yes
Check system of charging
No
You watch the following step
2
Check whether tension on the plug B of the traction relay moves
Yes
You watch the following step
No
Check a condition of wires
3
Check whether tension of the rechargeable battery to contact S traction relays moves at the pressed coupling pedal (on cars with the mechanical transmission) or at installation of the lever of the selector in a Park position (on cars with the automatic transmission) and turn of a key in the ignition lock in situation START
Yes
Replace a starter
No
Check the switch of blocking of a starter of provision of a pedal of coupling (on cars with the mechanical transmission)
Check the switch of range of transfers (on cars with the automatic transmission)
Check the ignition lock
Check a condition of wires

The starter engine quickly rotates
STEP
CHECK
 
ELIMINATION METHOD
1
Check whether the gear wheel of the obgonny coupling at inclusion of a starter will mix up
Yes
Remove a starter and check a condition of teeths on the obgonny coupling and a gear wreath of a flywheel
No
Replace a starter

The bent shaft of the engine rotates slowly
STEP
CHECK
 
ELIMINATION METHOD
1
Check the speed of rotation of a bent shaft at completely charged rechargeable battery
Yes
Believe system of charging
No
You watch the following step
2
Check reliability of fastening of wires of a starter and lack of corrosion for them
Yes
Repair or replace wires
No
Check lack of jamming of the engine of a starter. Repair or replace a starter

The control lamp of charging burns at the working engine
STEP
CHECK
 
ELIMINATION METHOD
1
Check tension of the rechargeable battery at an idling rotation frequency

Voltage is 14,1 – 14,7 V
Yes
Check a condition of the wires connecting the rechargeable battery and contact of the L generator, the generator and a control lamp
No
Believe system of charging

The discharged rechargeable battery
STEP
CHECK
 
ELIMINATION METHOD
1
Believe system of charging
Yes
Include ignition and check current size, as shown in the drawing

Current: less than 20 мА
No
If necessary, replace or repair details

Admissions of ignition
STEP
CHECK
 
ELIMINATION METHOD
1
In turn disconnect wires from each spark plug and check presence of a spark at an engine provorachivaniye a starter
Yes
Check spark plugs
If spark plugs as it should be, a condition of electric system are normal
If spark plugs not as it should be, clear or replace them
No
Check system of ignition

Diagnostics of malfunctions of system of charging and methods of their elimination

STEP
CHECK
 
ELIMINATION METHOD
1
Check the rechargeable battery

Tension: about 12,4 In
Yes
You watch the following step
No
Check the rechargeable battery
2
Launch the engine and check whether the control lamp of charging of the rechargeable battery burns
Yes
You watch a step 4
No
You watch the following step
3
Check, whether the correct tension on generator plugs

Specification
Contact
Ignition is included by ON, V
Tension, In
B
About 12
14,1 – 14,7
L
About 1
14,1 – 14,7
S
About 12
14,1 – 14,7

Yes
Check a condition of the wire connecting the rechargeable battery and contact In the generator
No
Check a condition of wires
Replace the generator
4 1. Turn on the ampermeter (with a limit of measurement at least 80 And) between the plug B and the plug In wires
2. Launch the engine
3. Switch off everything electric consumers and press a brake pedal
4. Check that the device shows current 65 A or more with a frequency of rotation of 2500-3000 min.-1
Prevention

Do not connect to "weight" contact In



Yes
 
No
You watch the following step
5 Make sure that a generator drive belt tension as it should be
Yes
Replace the generator
No
Adjust a generator drive belt tension