Whirlpool M-17 Technical Manual page 54

COMPONENT TESTING (Cont.)
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.
Diverter Position Optical Sensor
This test will check the wiring to the diverter sensor/position
sensor and the diverter assembly itself. The following items are
part of the diverter sensor/switch circuit:
n Harness/Connection
n Diverter Motor (see test on previous page)
n Diverter Position Optical Sensor
n Control Board
n Test Procedure
1. Check the operation of the diverter motor in the Service
Diagnostics Cycle. You should be able to "hear" the water
spraying from different spray arms as the diverter rotates
through the various wash zones.
2. If the diverter is diverting the flow of water to the wash
zones, the diverter motor is working-continue to step 3.
If not, perform the diverter motor test procedure on the
preceding page.
Strip Circuit - Diverter Switch
3-16 Whirlpool and KitchenAid
n
®
For Service Technician Use Only
Sensor
P11-3
Drive
P10-2
Electronic Control
Switch closes momentarily and then
reopens as the diverter reaches
each potential diverter position.
Filtration and Maytag
®
3. Unplug dishwasher or disconnect power.
4. Remove toe and outer door panels to access control board.
5. Visually check that the diverter position switch connector and
P11 connector on the control are securely installed.
¾ If visual check passes, go to step 6.
¾ If any of the connectors are not inserted properly,
reconnect and retest diverter position switch.
6. Check continuity of harness between diverter position switch
and P11 on control.
¾ If continuity test is good, continue to step 7.
¾ If continuity test fails, repair or replace harness as
needed.
7. To test diverter switch, set up voltmeter for DC voltage and
connect red lead to P11-2 and black lead to P10-2.
8. Plug in dishwasher or reconnect power.
9. Run the Service Diagnostics Cycle as stated in Step 1, and
you should observe the diverter position switch closing
momentarily and then reopening as it reaches each potential
position. DC voltage should vary from approximately 0 V
to 8-10 V as the diverter rotates and the sensor detects
positions. Monitor for several intervals of the Service
Diagnostics Cycle to observe behavior.
¾ If the sensor is functioning normally (Voltage is varying as
diverter rotates), proceed to step 10.
¾ If sensor does not detect positions properly, or voltage is
consistently at 0 V or 8-10 V and does not change, then
replace diverter assembly and retest.
10. If the preceding steps did not correct the diverter/position
switch problem, replace the control board and retest.
11. Reassemble all parts and panels.
12. Plug in dishwasher or reconnect power and run Diagnostics
Cycle to verify repair.
P11-2
P10-2
Diverter Position
Optical Sensor
Electronic Control
Reference for
DC power supply
24" Microfiltration Dishwashers
®
Sensor
Input
Ref