Component Readings/Testing - Maytag JDB4000AWB Technical Information

Component Readings/Testing

To avoid risk of electrical shock, personal injury, or death, disconnect power to dishwasher before servicing,
unless testing requires power.
Manual Function Test
A Manual Function Test may be started by pressing the
5 times followed by the Start key within 6 seconds.
The Normal Wash LED will Flash
active. Specific keypads will turn on or off a component as follows:
Heavy Wash
Normal Wash
Light Wash
Rinse Only
Sanitize
Heated Dry
When a component is activated by pressing a specific keypad, the LED above
the keypad will be On . The test will cancel 120 seconds after the last keypad is
pressed. The display (if available) will show '99' until the remaining timeout
period is less than 99 seconds. At this point it will countdown until the mode
times out, is cancelled, or another key is pressed. To cancel test, press the
Start / Cancel keypad.
Sales Floor Demo Mode
Press Extra Rinse keypad 5 times within 6 seconds. The LEDs will illuminate
in a progressive order until all are lit. All LED's will stay on for 1 second then all
go off simultaneously. The display (if available) will begin at '50' and sequence
down to '0' at a 1 second interval and repeat until this mode is terminated. This
mode will repeat.
To cancel, press the Start / Cancel
Diagnostic Tips
To check control LEDs, enter Sales Floor Demo Mode
perform as described, replace control. To check control and components, enter
Field Service Test . If control fails to perform sequence as described, and a
fault is detected, determine failure as described in the
load component failure has been diagnosed, proceed to the
Test . To check individual load components for proper operation, enter
Function Test . Follow test procedure as described. Repair or replace
component as needed.
Note : The High Current or Low Current Motor Error
a wash cycle selected by a consumer. If this happens, the control will go into a
30 second auto restart mode and shut down if the unit is not able to restart the
motor.
Membrane Readings
(Front Only Controls)
Heavy Wash
Normal Wash
Light Wash
Rinse Only
Auto Clean
Start / Cancel
Delay
Heated Dry
Sanitize
Tough Scrub
Tough Scrub Plus
Extra Rinse
Model ID Jumper *
An unpressed switch will read as an open circuit.
A pressed switch will read as 10 k ohms.
* On select models
16023063
!
Normal Wash
3 times indicating manual test mode is
Wash Motor
Drain Motor
Water Valve
Soap Dispenser (cycle once)
Rinse Aid (cycle twice)
Vent
Heating Element
keypad.
. If control fails to
Field Service Test
Manual Function
may be detected during
Connector Measure Between
J1 Pin 9 - Pin 5
J1 Pin 9 - Pin 6
J1 Pin 9 - Pin 7
J1 Pin 9 - Pin 8
J1 Pin 10 - Pin 5
J1 Pin 10 - Pin 6
J1 Pin 10 - Pin 7
J1 Pin 11 - Pin 5
J1 Pin 11 - Pin 6
J1 Pin 11 - Pin 7
J1 Pin 10 - Pin 8
J1 Pin 11 - Pin 8
J1 Pin 12 - Pin 7
Measure between:
Heater¹
ST1 (Heater) - ST11 (Dlb Neutral)
Wash Motor
ST5 (Motor Common) - ST8 (Motor Main)
Drain Motor
ST6 (Drain) - ST4 (Dlb Line)
Vent Wax Motor
J6 Pin 1 (Vent) - ST4 (Dlb Line)
Dispenser Wax Motor
J6 Pin 3 (Disp) - ST4 (Dlb Line)
Water Valve²
J6 Pin 4 (Inlt) - ST4 (Dlb Line)
Thermistor
J5 Pin 1 (Temp) - J5 Pin 4 (Neutral)
Notes:
1. This value assumes the high limit thermostat is closed.
2. This value assumes the float switch is closed.
3. Results are approximate values.
WARNING
key A Field Service Test may be started by pressing the
followed by the Start key within 6 seconds. This test must be performed with
clean water to insure proper sensor performance.
"88" will appear in the display (if available*) and the following sequence of
events will occur:
SECONDS
106
5
120
180
120
4
Time frame for Thermistor/Turbidity Sensor check & calibration may vary
slightly.
The Field Service Test will not repeat. The
the test mode. Indicator lights (except
illuminate per Sales Floor Demo Mode. If the dishwasher door is opened
during the test, the test sequence will pause, and resume when the door is
closed. To the cancel test, press the
The control has been designed to test the Sensor Memory and Motor. During
the Field Service Test, if a fault has been detected, the test will abort any time
after the motor current has been checked and 2 or more LED's will begin to
Flash . A Memory / Software Check
started. The (See Note )
Turbidity Sensor
Thermistor
. If a
Motor
Motor
Manual
Memory Failure Heated Dry
* On select models
** On units with Front Controls only, this will be the
Top & Front Controls, this will be the
Auto Clean
Heavy Wash
Normal Wash
Light Wash
Rinse Only
Quick Wash
Heated Dry
Sanitize
Extra Rinse
Tough Scrub Plus
160° Wash
Model ID Jumper *
Start / Cancel
Delay
An unpressed switch will read as an open circuit.
A pressed switch will read as 10 k ohms.
* On select models
Load Readings
3 to 4 ohms
1.2 k ohms
1.1 k ohms
See Component Info
4
Field Service Test
Heavy Wash
FUNCTIONS / ACTIVE LOADS
Vent Wax Motor/Water Valve
Thermistor check/Turbidity Sensor check &
calibration - no loads active.
Wash Motor/Vent Wax Motor/Dispenser Wax Motor
Wash Motor/Heater/Vent Wax Motor
Drain Pump
Water Valve
Heavy Wash LED will
Heavy Wash and the Display) will
Start / Cancel keypad.
will occur immediately after the test is
**
LED and one of the following:
- failure - Rinse Only
- failure - Heavy Wash LED
- high current - Normal Wash LED
- low current - Light Wash LED
- LED
Clean
Delay LED
Membrane Readings
(Front & Top Controls)
Connector Measure Between
J1
J1
J1
J1
J1
J1
J1
J1
J1
J1
J1
J1
J3
J3
Result
16 ohms
25 ohms
2 k ohms
©2004 Maytag Services
key 5 times
Flash during
LED
LED on units with ,
Pin 10 - Pin 5
Pin 9 - Pin 5
Pin 9 - Pin 6
Pin 9 - Pin 7
Pin 9 - Pin 8
Pin 10 - Pin 6
Pin 11 - Pin 5
Pin 11 - Pin 6
Pin 11 - Pin 8
Pin 10 - Pin 7
Pin 10 - Pin 8
Pin 12 - Pin 8
Pin 9 - Pin 5
Pin 9 - Pin 6
May 2004