Diagnostics - Whirlpool MVWC400XW Technical Education

2. Remove console to access main control.
3. Check the AC power cord for continuity.
(See Figure 9, page 20.)
4. Verify that ALL connectors are inserted
all the way into the main control.
TROUBLESHOOTING GUIDE (continued)
5. Plug in washer or reconnect power.
6. Is the "Diagnostic LED" ON or OFF? (See
FOR SERVICE TECHNICIANS ONLY
Figure 3 below for LED location.)
Main Control Board Connectors and Pinouts (Figure 3)
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 GRY TEMP THERMISTOR INPUT
J3-9 BLK TEMP THERMISTOR GND
J3-8 OPEN
J3-7 ORN FAB-SOFT VALVE (L1)
J3-6 BRN OXI VALVE (L1)
J3-5 BLU COLD VALVE (L1)
J3-4 RED HOT VALVE (L1)
J3-3 OPEN
J3-2 OPEN
J3-1 WHT NEUTRAL

J7
J7-3 BLK NEUTRAL
J7-2 GRN CHASSIS GROUND
J7-1 BLK L1

Diagnostic
LED
J7-Power Cord
J16-PSC Motor/Drain
8. With a voltmeter set to DC, connect black
probe to J9-3 (Circuit Gnd) and red probe to
J9-8 (+13VDC).
If +13VDC (and +5VDC) are present, and

UI is unresponsive, go to Test #4: Console
and Indicators, page 16.
If +13VDC is not present, go to step 9.

J9
J15
J16
J2-Shifter
J15-Lid Lock
6-6
J9-8 WHT +13VDC
J9-7 WHT BUZZER
J9-6 WHT CLOCK
J9-5 WHT DATA OUT
J9-4 WHT STROBE
J9-3 WHT -5VDC (CIRCUIT GND)
J9-2 WHT DATA IN
J9-1 BLK +5VDC

J15-4 RED LOCK SWITCH
J15-3 WHT NEUTRAL
J15-2 BLU LID SWITCH INPUT
J15-1 YEL LOCK SWITCH SOLENOID (L1)

J16-7 ORN MOTOR CCW WINDING (L1)
J16-6 RED MOTOR CW WINDING (L1)
J16-5 WHT MOTOR (NEUTRAL)
J16-4 OPEN
J16-3 LT BLU DRAIN PUMP MOTOR (L1)
J16-2 WHT BLU SHIFTER MOTOR (NEUTRAL)
J16-1 BRN SHIFTER MOTOR (L1)

represents pin-1
 =
J9-Console UI

J3-Temp/Valves