Maytag MTW6500TB Service Manual page 72

TEST #2 Log Valve
This test checks the electrical connections to
the valves, and the valves themselves.
1. Check the relays and electrical connec-
tions to the valves by performing the steps
under Diagnostic: Manual, then Manual:
Water Valves. Each step in the test ac-
tivates a group of valves. The following
steps assumes one (or more) valve(s)
failed to turn on.
2. For the valve(s) in question check the in-
dividual solenoid valves:
• Unplug washer or disconnect power.
• Disconnect connector P1 and P2 from
the machine/motor control.See Figure
4, page 6-16.
• Check harness connection to solenoid
valves.
3. Check resistance of valve coils at con-
tacts P1 and P2 shown in the Wiring Dia-
gram on page 7-1. Resistance values
should match those shown.
• If resistance readings are tens of ohms
outside of range, replace the entire log
valve assembly.
• If resistance readings are within range,
replace the machine/motor control as-
sembly.
4. Reconnect connectors P1 and P2 to the
machine/motor control.
TEST #3 Motor Circuit
This test checks the wiring to the motor and
rotor position sensor; and the motor and rotor
position sensor themselves.
NOTE: Drain water from tub.
1. See Activation of Manual Diagnostic Test
Mode, and check the motor and electrical
connections by performing the Spin test
under Manual: Motor. The following steps
assumes that this step failed.
2. Unplug washer or disconnect power.
3. Check to see if basket will turn freely.
• If basket turns freely, go to step 4.
• If basket does not turn freely, deter-
mine what is causing the mechanical
friction or lock up.
4. Remove the console to access the ma-
chine/motor control assembly. See Ac-
cessing & Removing the Electronic As-
semblies.
5. Visually check that the P5 and P10 con-
nectors are inserted all the way into the
machine/motor control.
• If visual checks pass, go to step 6.
• If visual checks fail, reconnect P5 and
P10 and repeat step 1.
6. Visually check that the P5 and P10 con-
nectors are inserted all the way into the
machine/motor control.
• With an ohmmeter, verify resistance
values as shown below:
Check
between Resistance values
connector should be:
pins
1-5
P5 31 Ω ± 5 Ω
1-3
6-5
6-4 15 k Ω ± 100 Ω
P10
6-3
1-7
7. Tilt machine forward to access the bottom
of the machine and the drive motor area.
See Figure 1 on page 6-13. Remove the
motor bolt, then the motor cover to ac-
cess the motor connections. See Figure
2 on page 6-13.
8. Visually check the mounting bracket and
electrical connections to the motor and
rotor position sensor board.
• If visual check passes, go to step 9.
• If visual check fails, reconnect the elec-
trical connections, reassemble stator
and motor cover and repeat step 1.
6-10
Go to
Go to
step 7 if
step 12 if:
values are:
Much higher
than 31 Ω
Resistances
Much higher
at all
or much
connectors
lower than
are correct
15 k Ω
600 Ω to
Out of range
21.2 k Ω