Whirlpool MVWC400XW Technical Education page 76

2. Unplug washer or disconnect power.
3. Check to see if basket will turn freely.
TROUBLESHOOTING GUIDE (continued)
If basket turns freely, go to step 4.

FOR SERVICE TECHNICIANS ONLY
If basket does not turn freely, determine what

WARNING
is causing the mechanical friction or lockup.
4. Remove console to access main control.
5. Visually check that the J2 and J16 connectors
are inserted all the way into the main control.
If visual checks pass, go to step 6.

If connectors are not inserted properly,

Electrical Shock Hazard
reconnect J2 and J16 and repeat step 1.
Disconnect power before servicing.
6. Plug in washer or reconnect power. Run the
Gentle Agitation test under Manual Test Mode.
Replace all parts and panels before
operating.
7. With a voltmeter set to AC; connect black
probe to J16-5 (N) and red probe to J16-6
Failure to do so can result in death or
(CW Winding).
electrical shock.
If 120VAC is cycling ON during CW rotation,

16. Replace the shifter assembly.
go to step 8.
a. Unplug washer or disconnect power.
If 120VAC is not present, go to Test #1:

b. Replace shifter assembly.
Main Control, page 12.
c. Reassemble all parts and panels.
8. With a voltmeter set to AC, connect black probe
d. Plug in washer or reconnect power. Calibrate
to J16-5 (N), red probe to J16-7 (CCW Winding).
washer and perform Automatic Test to
verify repair.
If 120VAC is cycling ON during CCW

rotation, go to step 9.
17. Replace main control.
a. Unplug washer or disconnect power. If 120VAC is not present, go to Test #1:

Main Control, page 12.
b. Replace the main control.
9. Unplug washer or disconnect power.
c. Reassemble all parts and panels.
10. Remove connector J16 from main
d. Plug in washer or reconnect power. Calibrate
washer and perform Automatic Test to
control. With an ohmmeter, verify resistance
verify repair.
values shown below across the following J16
TEST #3b: Drive System – Motor
connector pinouts:
This test checks the motor, motor windings,
Motor Winding
wiring, and start capacitor.
CW Winding
NOTE: Refer to Figure 5, "PSC Motor
CCW Winding
Strip Circuit" on page 15 for tests and
Resistance should be between 3.5 and 6 Ω .
measurements.
IMPORTANT: Drain water from tub before
Main Control
L1
CW TRIAC
J7-1
CCW TRIAC
.
.
J16 Connector Pinout
J16, 5 & 6
J16, 5 & 7
PSC Motor
J16-6
Pin 6
1
CW Winding
Run
Cap
CCW Winding
3
Pin 3
J16-7
Each Winding 3.5 to 6 ohms
Figure 5 - PSC Motor Strip Curcuit (shown in ON position)
Figure 5 - PSC Motor Strip Circuit (shown in ON position)
If values are open or out of range, go to step 11.

If values are correct, go to step 15.

11. Tilt washer back to access the bottom
of the washer and the drive motor area.
accessing bottom of washer.
12. Visually check the mounting bracket and
electrical connections to the motor and shifter.
1. Check the motor and electrical connections
by performing the Gentle or Heavy
If visual check passes, go to step 13.

Agitation test under Manual Test Mode.
If connections are loose, reconnect the
The following steps assume that this step

was unsuccessful.
electrical connections, reassemble motor
cover, and repeat step 1.
2. Unplug washer or disconnect power.
13. With an ohmmeter, check the harness
3. Check to see if basket will turn freely.
for continuity between the main control, motor,
If basket turns freely, go to step 4.
and run capacitor using the following test
If basket does not turn freely, determine
points. See chart.
what is causing the mechanical friction or
Motor Harness Check
lockup.
Motor Connector Pin-1 to Chassis Ground
4. Remove console to access main control.
Motor Connector Pin-3 to Main Control J16-7
Motor Connector Pin-3 to Run Capacitor Pin-3
5. Visually check that the J2 and J16
Motor Connector Pin-6 to Main Control J16-6
connectors are inserted all the way into the
Motor Connector Pin-6 to Run Capacitor Pin-1
main control.
Motor Connector Pin-9 to Main Control J16-5
If there is continuity, go to step 14.
If visual checks pass, go to step 6.

If connectors are not inserted properly, If there is no continuity, replace the lower

reconnect J2 and J16 and repeat step 1.
machine harness and repeat step 1.
6. Plug in washer or reconnect power. Run the
14. With an ohmmeter, check the motor
Gentle Agitation test under Manual Test
windings at the following motor connections.
Mode.
Motor Winding
7. With a voltmeter set to AC; connect black
CW Winding
probe to J16-5 (N) and red probe to J16-6
CCW Winding
(CW Winding).
Resistance should be between 3.5 and 6 Ω .
If 120VAC is cycling ON during CW rotation,
If values are open or out of range, replace
go to step 8.

motor.
If 120VAC is not present, go to Test #1: Main
Control, page 12.
If values are correct, go to step 15.

8. With a voltmeter set to AC, connect black
probe to J16-5 (N), red probe to J16-7
(CCW Winding).
If 120VAC is cycling ON during CCW
rotation, go to step 9.
If 120VAC is not present, go to Test #1: Main
Control.
Main Control
J15-4
Pin 9 J16-5
Lock Switch
Pin 1
6-9
Motor Pinout
Pins 4 & 6
Pins 3 & 6
N
Main Control
J15-3 J7-3