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Door Lock
The door lock assembly consists of the door
switch and locking mechanism. The lock
mechanism functions are as follows:
• To transition the lid lock solenoid, the control
shall drive the lock coil for exactly 5 AC half-
cycles (40 milli-s/- 10 ms.).
• The control shall wait 1-second before
reading the lock feedback to see if the
transition is successful.
• The control shall wait at least 1.5-seconds
between retries if a lock transition fails.
• The control shall try up to three times if the
lock transition fails (a minimum 1.5-seconds
delay between each try is required).
• If the lock is not successful after three tries, it
shall provide a 30-second cool down period
before trying again.
• After cool down the control will try an
additional four times (with delay). If the four
tries are unsuccessful, a 180-second cool
down will be applied and a "Critical Lid Lock
Fault" will be set.
Retry logic should reset on successful lock
attempt or on critical lid lock fault.
Door Lock Assembly Diagnosing
Checking from the
Main Board
1. To check the door switch, with the door
closed, pins 2 to 3 will read approximately
127 ohms. Pin 1 to 2 will read open. If no
reading from pins 2 to 3, replace the door lock
assembly.
2. To check the door lock, with the door closed,
pins 1 to 2 and 2 to 3 will read approximately
127 ohms. If no reading from either pin sets,
replace the door lock assembly.
3. With the door unlocked and open, pins 1
to 2 and 2 to 3 will read open. If there is a
reading, replace the door lock assembly.
Main Board
J513
Main Board
Door Lock
Assembly
Door Switch
Lock
When locked J513 (2) is line
Shown in unlocked position
door open.
Main Board
Pin 2
Pin 1
Pin 3
Door Switch
Contact
Door Lock
Contact
Latch/Lock
Mechanism
Door
Switch
Plunger
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