Generators & Regulators - Evolution: Other Mitsubishi Lancer IX

BELT TENSION

For belt tension, see ADJUSTMENTS .

Abnormal Waveforms

The size of the waveform patterns can differ greatly, depending on the adjustment of the variable knob on the oscilloscope. (Scheme 31)

Identification of abnormal waveforms is easier when there is a large output current (regulator is not operating). Waveforms can be observed when the headlights are illuminated.

Check the conditions of the generator malfunction light (illuminated/not illuminated) also, and carry out a total check.

Scheme 31

Measurement Method

Connect the oscilloscope special patterns pick-up to the generator B terminal. (Scheme 32)

Scheme 32

Standard Waveform

Note. The voltage waveform of the generator B terminal can undulate. This waveform is produced when the regulator operates according to fluctuations in the generator load (current), and is normal for the generator. If the ripple height is abnormally high (approximately 2V or more during idling), the wires between the generator B terminal and the battery have broken due to fuse blowing, etc. The generator is usually operating properly.

For standard waveform observation conditions (Scheme 33)

Scheme 33

BRUSH

1. Measure the length of the protrusion of the brush. Replace the brush if the protrusion length is shorter than the limit of 2 mm. (Scheme 34)
2. Unsolder the lead of the brush. The brush will come out, ready for removal.
3. Install a new brush by pushing it into the holder. (Scheme 35)

Scheme 34

Scheme 35

ROTOR

1. Measure the resistance between the 2 slip rings of the rotor coil to check the continuity between them. Replace the rotor if the resistance is not within the standard value range of 3-5ohm. (Scheme 36)
2. Check the continuity between the slip ring and the core. If there is continuity, replace the rotor. (Scheme 37)

Scheme 36

Scheme 37

RECTIFIER

1. Check the condition of the positive heat sink by checking continuity between the positive heat sink and each of the stator coil lead connecting terminals. If continuity is present for both terminals, the diode is shorted. Replace the rectifier assembly. (Scheme 38)
2. Check the condition of the negative heat sink by checking continuity between the negative heat sink and each of the stator coil lead connecting terminals. If continuity is present in both directions, the diode is shorted. Replace the rectifier assembly. (Scheme 39)
3. Check the condition of the diode trio by testing continuity of each of the 3 diodes using a circuit tester connected to both sides of the diode. If the same reading results for both polarities, the diode is defective. Replace the rectifier assembly if any of the diodes are defective. (Scheme 40)

Scheme 38

Scheme 39

Scheme 40

STATOR

1. Check the continuity between the coil lead. If there is no continuity, replace the stator. (Scheme 41)
2. Check the continuity between the coil and the core. If there is continuity replace the stator. (Scheme 41)

Scheme 41

For generator removal and installation procedures (Scheme 42)

Scheme 42