Test #3 Drive System; Test #3A: Drive System-Shifter - Whirlpool WETLV27HW0 Service Manual

TESTING – WASHER
DANGER
Electrical Shock Hazard
Only authorized technicians should perform
diagnostic voltage measurements.
After performing voltage measurements,
disconnect power before servicing.
Failure to follow these instructions can result in
death or electrical shock.

TEST #3 Drive System

Pre-Test Procedure
1. Activate Service Diagnostic Test Mode, retrieve any fault/
error codes, and clear them. If the displayed error codes
are F7-E1, F7-E5, or motor speed codes, there is likely a
motor, capacitor, or shifter related issue.
2. Once the error codes are cleared, enter Manual Test
Mode and run the Heavy Agitation test; if the motor runs
after 15–20 seconds, there is not a problem with the
motor, capacitor, control, or wiring harness connections
(although the black wire from the shifter to the control
should still be checked).
NOTE: The speed wheel in the transmission only turns
during the spin cycle.
3. While in Manual Test Mode, try to get the washer to spin;
if the motor hums briefly and then shuts down (with the
lid lock indicator blinking), go to Fault Code Display Mode
and look for shifter or basket speed errors, which verify an
issue with the shifter/sensor assembly (optical sensor is
not reading the motor speed).
TEST #3a: Drive System – Shifter
This test checks connections, shifter motor, switch, and optical
sensor.
NOTE: Refer to Figure 2, "Shifter Assembly Strip Circuit" on
page 3-9 for tests and measurements.
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 test under Manual Test Mode
on page 2-11. The following steps assume that this step
was unsuccessful.
2. Unplug washer/dryer or disconnect power.
3-8 27" Stacked Laundry Center
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For Service Technician Use Only
3. Check to see if basket will turn freely.
¾ If basket turns freely, go to step 4.
¾ If basket does not turn freely, determine what is
causing the mechanical friction or lockup.
4. Remove console to access main control.
5. Visually check that the J12 and J2 connectors are inserted
all the way into the main control.
¾ If visual checks pass, go to step 6.
¾ If connectors are not inserted properly, reconnect J12
and J2 and repeat step 1.
Shifter Motor:
NOTE: Before starting the electrical check, verify that the cam
on the splutch is moving freely and not binding.
6. Remove connector J2 from main control. With an
ohmmeter, verify resistance of the shifter motor across
the following J2 connector pinouts:
Component
Shifter Motor
Resistance should be 2k to 3.5k Ω.
¾ If values are correct, reconnect J2 and proceed to step 7.
¾ If values are open or out of range, check lower washer
harness connector according to diagram. If the values
are still open or out of range, go to step 13.
7. Plug in washer/dryer or reconnect power.
8. With a voltmeter set to AC, connect the black probe to
J2-2 (L1) and red probe to J2-1 (N). Activate shifter motor
by switching between Spin and Agitate modes. Energize
outputs using Manual Test Mode on page 2-11.
IMPORTANT: Lid must be closed with Lid Lock enabled to
run the SPIN and AGITATE tests.
NOTE: It will take 4–15 seconds for the shifter to change
states.
¾ If 120 VAC is present, go to step 9.
¾ If 120 VAC is not present, go to step 17.
Shifter Switch:
9. With a voltmeter set to DC, connect the black probe to
J12-4 (Circuit Gnd) and red probe to J12-3 (Shifter Switch).
In manual test mode, switch between Spin and Agitate
modes. Voltage should toggle between 0 and +5 VDC.
SPIN = +5 VDC
AGITATE = 0 VDC
¾ If voltage corresponds to setting, go to step 10.
¾ If voltage does not switch, check lower harness
connector according to diagram. If voltage still does not
switch, go to step 12.
Optical Sensor:
10. With a voltmeter set to DC, connect the black probe to
J12-4 (Circuit Gnd) and red probe to J12-1 (+12 VDC).
¾ If +12 VDC is present, go to step 11.
¾ If +12 VDC is not present, check lower harness
connector according to diagram. If +12 VDC is still not
present, go to step 17.
J2 Connector Pinout
J2, 1 & 2