Measuring instruments must have the following measurement limits:
- Ammeter: 0-400A
- Voltmeter: 0-20V, error not more than 0.1V
- Tachometer: 0-1200 rpm
1. Connect ammeter and voltmeter as shown.
2. To prevent the engine from starting, reduce fuse #46 to 15A from the relay box.
3. Check how the crankshaft turns.
Turn the ignition key to the START position (III) and make sure the crankshaft turns.
If the crankshaft does not turn, check the battery for damage, check the state of charge of the battery, the condition of the cable connections and repeat the starter test.
If the crankshaft does not turn again when rechecking, disconnect the black and white wire from the starter solenoid switch and apply (+) battery directly to contact S e / magnetic switch.
If the crankshaft does not turn even when the battery is connected directly, disassemble the starter and check it.
If the crankshaft rotates when the battery is connected directly:
- Check the black and white wire between the starter and the ignition switch for an open and a loose connection.
- Check the position of the automatic transmission selector lever.
- Check the starter disable relay.
4. Check the sound of the starter gears.
Turn the ignition key to the START position (III) and check that the crankshaft rotates smoothly without abnormal sound.
If an abnormal sound is heard, check the drive gear (gear/clutch) and starter ring gear for wear and damage.
5. Check if the starter drive gear returns to its original position.
Make sure that after returning the ignition key from the START position (III) to the ON position (II) the starter drive gear disengages from the ring gear and returns to its original position. 1
If the drive gear does not return to its place and an abnormal sound is heard, check the drive gear for dirt and damage, and check the magnetic switch.
6. Check starter operation under load.
Turn the ignition key to the START position (III) and while cranking the crankshaft, measure the voltage and current.
Do not operate the starter for a long time.
Read the voltmeter and ammeter readings after they stabilize.
- Standard voltage: more than 8.5V
- Standard current: 350A and below
If the voltage or current values are not correct, do the following:
- Check battery charging status.
- Check for open circuits on the rotor commutator segments.
- Check the resistance to rotation of the rotor.
- Check short circuit rotor windings.
- Crankshaft force.
7. Check starter speed.
Turn the ignition key to the START position (III) and measure the starter speed.
Standard Frequency: Approx. 100/min
If the frequency is below normal, check the following:
- Battery charging status.
- Battery and starter contacts.
- Condition of the starter brushes.
- Breakage of rotor commutator segments.
- Contamination and damage to the starter drive gear and ring gear.
- Voltage drop on the e / magnetic switch.