See next page
for measuring
value using
multimeter
IPM (Intelligent Power Module) DIAGNOSIS
PS21564-C
Circuit of 1 device
Gate
Collector
Emitter
Internal circuit
diagram of
module
Terminal
symbols of
power module
6
：
PGU
12
：
PGV
18
：
PGW
21
：
NGU
22
：
NGV
23
：
NGW
24
：
Fail signal
31
：
P
32
：
U
33
：
V
34
：
W
35
：
N
NGW
NGV
NGU
PGW
PGV
PGU
P
U
V
W
ＬＩＮ２
ＦＯ
ＬＩＮ３
ＨＳ
ＨＩＮ
ＬＯ３
３４
ＬＯ１
ＬＩＮ１
ＨＳ
ＨＯ
ＨＯ
ＨＩＮ
ＨＩＮ
ＨＯ
３３
ＬＯ２
ＨＳ
３２
N
28 26 24 22 20 18 16
12 10
6 4
1
27 25
35
34
33
32
31
N
W
V
U
P
23 21
15 13
9 7
3
２４
３５
２３
２２
２
１
１８
１２
６
３
１
Model
P
U
V
W
U
P
N
V
W
N
Diagnosis procedure for power module using multimeter
[Inverter section]
Set the multimeter to resistance range of
×
100. If
×
100 is not provided, measure with the range of
×
1 to
×
100.
If the pointer does not swing when the following continuity check is performed, it is normal.
(When a digital multimeter is used, + and - terminals will be reversed, since the orientation of built-in
battery is inverted.)
Note:
If internal circuit of power module is disconnected (open) and pointer of the mutimeter does not swing,
it may be assumed to be normal. If the pointer swings when + and - terminals are connected in
reverse, it is normal. Compare swing statuses for U, V and W phases: If the statuses at all 3 points are
the same, it is normal.
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