Troubleshooting Tests - Whirlpool Maytag MVWP576KW Technical Manual

COMPONENT TESTING (Cont.)
TEST #1: Main Control
This test checks for incoming and outgoing supplies to and from the
main control. This test assumes that proper voltage is present at the
outlet.
1. Unplug washer or disconnect power.
2. Remove console to access main control.
3. Verify that all connectors are inserted all the way into the
main control.
4. Plug in washer or reconnect power.
5. With a voltmeter set to AC, connect black probe to
J7-3 (Neutral) and red probe to J7-1 (L1).
n If 120 VAC is present, go to step 6.
n If 120 VAC is not present, check the AC power cord for continuity
(See Wiring Diagram).
6. Is the "Diagnostic LED" ON or OFF? (See Figure below for LED
location.)
n ON: (+5 VDC present) continue to step 7.
n OFF: (+5 VDC missing) proceed to step 8.
 = represents pin-1
3-4 Maytag 3.5 cu.ft. Commercial-Grade Residential Agitator Washer
n
®
For Service Technician Use Only

Troubleshooting Tests

Main Control Board Connectors and Pinouts
J2
J2-5 OPEN
J2-4 BLK +13VDC
J2-3 GRY -5VDC (CIRCUIT GND)
J2-2 PNK RPM INPUT
J2-1 BLU SHIFTER POSITION INPUT

J3
J3-10 BLK TEMP THERMISTOR INPUT (HYBRID)
J3-9 BLK TEMP THERMISTOR GND (HYBRID)
J3-8 OPEN
J3-7 OPEN
J3-6 OPEN
J3-5 BLU COLD VALVE (L1)
J3-4 RED HOT VALVE (L1)
J3-3 OPEN
J3-2 OPEN
J3-1 WHT NEUTRAL

J4
J4-3 BLU PRESSURE TRANSDUCER INPUT
J4-2 OPEN
J4-1 BLU -5VDC (CIRCUIT GND)

J7
J7-3 BLK NEUTRAL
J7-2 GRN CHASSIS GROUND
J7-1 BLK L1
J4-Pressure Transducer
Diagnostic
LED
J7-Power
Cord
J7
J16-PSC Motor/Drain
7. With a voltmeter set to DC, connect black probe to
J2-3 (Circuit Gnd) and red probe to J2-4 (+13 VDC).
n If +13 VDC is present, main control supplies are good.
n If +13 VDC is not present, go to step 8.
8. Check if shifter assembly is affecting the main control DC
supplies.
a. Unplug washer or disconnect power.
b. Remove connector J2 from main control.
c. Plug in washer or reconnect power.
d. Repeat steps 6 and 7. Perform the +13 VDC check inside header
J2 on the board – do not short pins together.
n If one or more DC voltages are still missing, go to step 9.
n If the DC voltages return, check for short in harness between
main control and shifter assembly.
n If harness and connections are good, replace shifter assembly.
J10
J10-6 BLK
J10-5 BLK
J10-4 BLK
J10-3 BLK
J10-2 BLK
J10-1 BLK

J11
J11-6 RED
J11-5 RED
J11-4 RED
J11-3 RED
J11-2 RED
J11-1 RED

J15
J15-4 RED
J15-3 WHT
J15-2 BLU
J15-1 YEL

J16
J16-7 ORN
J16-6 RED
J16-5
J16-4 WHT
J16-3 LT BLU DRAIN PUMP MOTOR (L1)
J16-2 W/ BLU SHIFTER MOTOR (NEUTRAL)
J16-1 BRN

J2-Shifter J11-Rotary Encoders *
J11
J4 J10
J2
J16
J3
J15
J15-Lid Lock
ROW 2
ROW 3
COLUMN 0
COLUMN 1
COLUMN 2
COLUMN 3
ROW 4
ROW 5
COLUMN 0
COLUMN 1
COLUMN 2
COLUMN 3
LOCK SWITCH
NEUTRAL
LID SWITCH INPUT
LOCK SWITCH SOLENOID (L1)
MOTOR CCW WINDING (L1)
MOTOR CW WINDING (L1)
OPEN
MOTOR (NEUTRAL)
SHIFTER MOTOR (L1)
J10-Rotary
Encoders
J3-Temperature
Sensor/Valves
* Not available on all models