Whirlpool Cabrio WTW8500DC Service Manual page 15

FOR SERVICE TECHNICIAN'S USE ONLY
a. With a voltmeter set to DC, connect black
probe to J18-3 (Circuit Gnd) and red probe to
J18-1 (+5VDC).
 If DC voltage is not present, go to step 9.
 If the DC voltage is present, but the
diagnostic LED is not flashing, continue to
step 9.
9. Main Control has malfunctioned.
a. Unplug washer or disconnect power.
b. Replace the main control.
c. Reassemble all parts and panels.
d. Plug in washer or reconnect power.
Perform Service Diagnostics to verify repair.
TEST #2: Valves
This test checks the electrical connections
to the valves, and the valves themselves.
1. Check the relays and electrical connections
to the valves by performing the Cold, Hot,
Oxi (not on all models), and Fabric Softener
Service Test Load Control on page 4. Each test
activates and deactivates the selected valve.
The following steps assume one (or more)
valve(s) did not turn on.
2. For the valve(s) in question check the
individual solenoid valves:
a. Unplug washer or disconnect power.
b. Remove console to access main control.
c. Remove connector J2 from main control.
Refer to main control diagram on page 14.
d. Check harness connection to solenoid valves.
3. Check resistance of the valve coils across
the following J2 connector pinouts:
V l a e v
Fabric Softener
OXI (not on all models)
Hot
Cold
Resistance should be 790–840 Ω.
 If resistance readings are tens of ohms
outside of range, replace the valve assembly.
 If resistance readings are within range,
replace main control and perform Service
Diagnostics to verify repair.
TEST #3: Drive System
1. Activate Service Diagnostic Test Mode,
retrieve any fault/error codes, and clear them. If
the displayed error codes are F7E3, F7E4, F7E5,
F7E6, F7E7, there is likely a motor or shifter
related issue.
DO NOT REMOVE OR
i P o n t u
J2, 4 & 7
J2, 4 & 8
J2, 4 & 9
J2, 4 & 10
DESTROY
2. Once the error codes are cleared, enter
Service Load Control Mode and run the Heavy
Agitation test; if the motor runs after 15–20
seconds, there is not a problem with the motor,
control, or motor wiring harness connections.
3. While in Service Load Control Mode, try to
get the washer to spin; if the motor hums briefly
and then shuts down, go to Fault Code Display
Mode and check for fault codes.
TEST #3a: Drive System – Shifter
This test checks connections, shifter coil, and
harness.
NOTE: Lid must be closed and locked for the
motor to agitate or spin.
IMPORTANT: Drain water from tub before
accessing bottom of washer.
Functional Check:
1. Check the shifter and electrical connections
by performing both the Spin and Agitate tests
under Service Load Control Mode on page 4.
The following steps assume that this step was
unsuccessful.
2. Unplug washer or disconnect power.
3. The motor and shifter should be able to
be turned independently of each other. If they
are locked together, there is a shifter slider
issue. Proceed to step 12. NOTE: Rotating the
impeller quickly can cause the UI to attempt
to power up, and may cause audible feedback
and the main control to power up and apply
braking torque to the impeller.
 If basket and impeller turn freely, go to step 4.
 If basket and/or impeller do not turn freely,
determine what is causing the mechanical
friction or lockup.
4. Remove console to access main control.
5. Visually check that the J4 connector is
inserted all the way into the main control.
 If visual checks pass, go to step 6.
 If connector is not inserted properly,
reconnect J4 and repeat step 1.
6. Plug in washer or reconnect power.
7. With a voltmeter set to AC, connect the
black probe to J4-1 (N) and red probe to J4-7
(L1). Activate shifter motor by switching the
shifter output ON and OFF. Energize outputs
using Service Load Control Mode on page 4.
NOTE: Motor must be stopped to toggle the
shifter. Alternately, Spin and Agitate can be
commanded to switch shifter in Service Load
Control Mode.
IMPORTANT: Lid must be closed with Lid Lock
enabled to run the Spin and Agitate tests.
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