Alternator Relay Continuity Check - Mitsubishi Pajero Pinin 1999 Workshop Manual

16-10
EXAMPLES OF ABNORMAL WAVEFORMS
NOTE
1. The size of the waveform patterns differs largely, depending on the adjustment of the variable knob
on the analyzer.
2. Identification of abnormal waveforms is easier when there is a large output current (regulator is not
operating). (Waveforms can be observed when the headlamps are illuminated.)
3. Check the conditions of the charging warning lamp (illuminated/not illuminated). Also, check the charging
system totally.
Abnormal waveforms
Example 1
Example 2
Example 3
1
3
ENGINE ELECTRICAL ±
Problem
cause
Open diode
Short in diode
Broken wire
in stator coil

ALTERNATOR RELAY CONTINUITY CHECK

1. Remove the alternator relay from the relay box inside
2. Set the analogue-type circuit tester to the Ω range and
3. Next, check that there is no continuity when the (+) terminal
Alternator
relay
4. If the continuity checks in steps 2 and 3 show a defect,
2
4
Charging System
Abnormal waveforms
Example 4
Example 5
At this time, the charging warning lamp
is illuminated.
the instrument panel.
check that there is continuity when the (+) terminal of
the tester is connected to terminal 2 of the alternator relay
and the (±) terminal is connected to terminal 4.
is connected to terminal 4 and the (±) terminal is connected
to terminal 2.
replace the alternator relay.
Problem cause
Short in stator
coil
Open
supplementary
diode