Door Switch Circuit - KitchenAid KMTM704E Series Technical Education

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.

Door Switch Circuit

Perform the following checks if the dishwasher does not
detect the door open or closed. This test will check the wiring
to the door switch and the door switch itself. The following
items are part of the door switch circuit.
n Harness/Connection
n Door Switch/Latch Assembly
n Control Board
Test Procedure
1. Check for improper installation of the dishwasher or
leveling. Check door latch mechanism for obstructions
-2 -1
or binding. Verify door seal is seated properly. Check -4 -3 -2 -1
for interference between dish racks and door. Repair as
necessary.
P4
2. Unplug dishwasher or disconnect power.
3. Remove outer door panel to access door latch and remove
toe and access panels to access control board.
Strip Circuit – Door Switch
13V
N.O.
V V
P9-6 P9-5
Door
Switch
P10-4
Electronic Control
Motor Power
L1
For Service Technician Use Only
Control Pinout
(Top)
W2
P5
P6
-6 -9 -1
-1
P5
P6
BR
Dishwasher Strip Circuits
(To Heater)
N.O.
Door
K1
Switch
Heater (N) Relay
Sensing
Input
Ref
4. Check door switch contacts and all connections in the
door switch circuit. Visually check that the P9 connector
on the control and the door latch connector are securely
installed.
¾ If visual check passes, go to step 5.
¾ If any of the connectors are not inserted properly,
reconnect and retest door latch/switch.
5. Disconnect connector P9 from the control board.
6. Using an ohmmeter, measure across P9, pins 5 and 6 with
the door closed, strike completely in latch mechanism
(switch closed).
¾ If 3 ohms or less is measured, proceed to step 7.
¾ If high resistance is measured when door is closed,
check for loose connections and repair as needed.
7. Using an ohmmeter, measure across P9, pins 5 and 6 with
the door open, strike removed from latch mechanism
(switch open).
¾ If reading is infinite, go to step 8.
¾ If reading shows continuity, or door switch is damaged,
Ω of F9 Triac Fuse
replace door switch and retest.
8. Set voltmeter to DC and connect red lead to test-pad P9-6
(13V) and black lead to P13-4 (DC GND) on the control
board.
9. Plug in dishwasher or reconnect power and with door
open, verify that 13 VDC is present across P9-6 and P13-4.
P7
P8 P9
¾ If 13 VDC is not present, replace the control and retest.
¾ If 13 VDC is present, proceed to step 10.
10. Reconnect P9 to control board and perform Diagnostic
Cycle to verify operation.
11. Unplug dishwasher or disconnect power.
12. Reassemble all parts and panels.
13. Plug in dishwasher or reconnect power.
-1 -6 -1 -5 -6
-6
P7 P8 P9
BU RD V
Unplug dishwasher or disconnect power.
I
Perform resistance checks. To check resistance of a com
I
disconnect harness leads first.
(To Wash Motor,
Vent, and Triac Loads)
N.O.
K2
Pilot (L1) Relay
Micro Pin Micro Pin
Electronic Control
KitchenAid 2015 Microfiltration Dishwashers
Run
Winding
P10 P11
-1 -3 -5 -1 -2 -4 -6 -1 -3
P10 P11 P12
BR RD YL
(To Wash Motor)
(To Heater)
N.O.
K3
Heater (L1) Relay Motor (N) Relay
Micro Pin
Sense Resistor
or Jumper
TESTING
P12
P13
(OWI)
P12 (Wide Out)
P13
N.O.
K4
Micro Pin
n
6-7
N