Whirlpool W10254428A Manual page 22

FOR SERVICE TECHNICIAN'S USE ONLY
4. Unplug washer or disconnect power.
5. Remove top panel to access machine
electronics.
6. Visually check that the DLS3 and DPS3
connectors are inserted all the way into the EB.
Refer to EB diagram on page 20.
7. Open the cover on the sensor module and
visually check that the J1 connector is inserted
all the way into the Mini-bulk Sensor board.
If both visual checks pass, go to step 8.
If connector(s) are not inserted properly,
reconnect and perform step 2 to verify
repair.
8. With an ohmmeter, check the harness
for continuity between the sensor and the EB.
If there is continuity, go to step 9.
If there is no continuity, repair or replace as
necessary. Perform step 2 to verify repair.
9. Plug in washer or reconnect power.
10. With a voltmeter set to DC, connect black
probe to the sensor module connector J1-3
(GND) and red probe to J1-1 (+5V [Vcc]).
If +5VDC is present, go to step 11.
If +5VDC is not present, perform TEST
#13: "Expansion Board Power Check" on
page 20. If test passes and +5 volts is still
not present at connector J1, replace the
expansion board.
EXPANSION
BOARD
DLS3
DPS3
Figure 15 - Sensor Module Block Diagram
PAGE 22
1
2
3
1
3
11. With a voltmeter set to DC, connect black
probe to the sensor module connector J1-3
(GND) and red probe to J1-5 (Presence Sensor
Output). Press the "Auto Dispense" button and
then measure the output voltage.
If the voltage range is greater than 0.25
volts and less than 4.75 volts, the sensor is
connected and functioning. Go to step 12.
If the voltage is less than 0.25 volts (short
to ground) or greater than 4.75 volts (short
to +5VDC), replace the sensor module.
12. With a voltmeter set to DC, connect black
probe to the sensor module connector J1-3
(GND) and red probe to J1-2 (Level Sensor
Output). Press the "Auto Dispense" button
and then measure the output voltage.
If the voltage range is greater than 0.25
volts and less than 4.75 volts, the sensor is
connected and functioning. Go to step 13.
If the voltage is less than 0.25 volts (short
to ground) or greater than 4.75 volts (short
to +5VDC), replace the sensor module.
13. Replace the Expansion Board.
Unplug washer or disconnect power.
Replace the EB.
Reassemble all parts and panels.
Perform step 2 to verify repair.
SENSOR MODULE
J1
2 Level Sensor Output
3 Ground
1 Vcc (+5)
5 Presence Sensor Output
4 Vcc (+5V)
DO NOT REMOVE OR DESTROY