33
B. The Phase-to-Phase Test
(see Figure 13 below)
Set ohm meter to lowest possible setting and
measure the motor phase to phase resistance by
checking these combinations of the 3-pin motor
connector with an
ohm meter:
Lead 1 to lead 2
Lead 1 to lead 3
Lead 2 to lead 3
For the purpose of this test, either end of the 3-pin
plug is lead 1. Resistance values should be less
than 20 ohms and each of the three values should
be the same (plus or minus 10%). If the measured
resistance is outside of these parameters, the
motor fails the test.
PHASE -
- PHASE TEST
MOTOR CONNECTOR
(3-PIN)
MOTOR OK WHEN
R
<
20 ohm
(lead to lead)
Figure 13
C. If the motor passes both of these tests and the
shaft spins freely when rotated by hand,
then the
motor is ok and only the control must be replaced.
Continue with replacing the ECM control module
in step 5.
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