Maytag Bravos X Series Technician Manual page 14

FOR SERVICE TECHNICIAN'S USE ONLY
IMPORTANT: Lid must be closed with Lid Lock
enabled to run the SPIN and AGITATE tests.
NOTE: It will take 4–15 seconds for the shifter
to change states.
 If 120VAC is present, go to step 9.
 If 120VAC is not present, to step 17.
Shifter Switch:
9. With a voltmeter set to DC, connect the
black probe to J2-3 (Circuit Gnd) and red
probe to J2-1 (Shifter Switch). In manual test
mode, switch between Spin and Agitate modes.
Voltage should toggle between 0 and +5VDC.
SPIN = +5 VDC
AGITATE = 0 VDC
 If voltage corresponds to setting, go to
step 10.
 If voltage does not switch, go to step 12.
Optical Sensor:
10. With a voltmeter set to DC, connect the
black probe to J2-3 (Circuit Gnd) and red
probe to J2-4 (+13VDC).
 If +13VDC is present, go to step 11.
 If +13VDC is not present, go to step 17.
11. Activate Tachometer Verification Mode
from the Service Diagnostic Test Modes (see
page 5). Slowly turn the basket by hand. The
4 status LEDs should illuminate one at a time
to represent basket RPM.
 If the tachometer is not verified, go to step 12.
 If the tachometer is verified, go to step 17.
12. Unplug washer or disconnect power.
13. Tilt washer back to access the drive system.
14. Visually check the electrical connections
to the shifter.
 If visual check passes, go to step 15.
L1
Main Control
K8
J7-1
Shifter Motor Relay
Circuit Ground
+13VDC
Figure 4 - Shifter Assembly Strip Circuit (Shifter Switch: Open = SPIN, Closed = AGITATE)
PAGE 14
Shifter Assy
Motor Resistance 2k to 3.5k ohms
J16-1
Pin 3
J2-3
Pin 5
J2-4
Pin 4
 If connections are loose, reconnect the
electrical connections and repeat step 1.
15. With an ohmmeter, check the harness for
continuity between the shifter and main control
using the following pinouts. See chart below.
Shifter to Main Control & Drain Pump
Shifter Connector Pin-2 to Main Control J16-2
Shifter Connector Pin-3 to Main Control J16-1
Shifter Connector Pin-4 to Main Control J2-4
Shifter Connector Pin-5 to Main Control J2-3
Shifter Connector Pin-6 to Main Control J2-2
Shifter Connector Pin-7 to Main Control J2-1
 If there is continuity, go to step 16.
 If there is no continuity, replace the lower
washer harness and repeat step 1.
16. Replace the shifter assembly.
a. Unplug washer or disconnect power.
b. Replace shifter assembly.
c. Reassemble all parts and panels.
d. Plug in washer or reconnect power. Calibrate
washer and perform Automatic Test to verify repair.
17. If the preceding steps did not correct the
problem, replace the main control.
a. Unplug washer or disconnect power.
b. Replace the main control.
c. Reassemble all parts and panels.
d. Plug in washer or reconnect power. Calibrate
washer and perform Automatic Test to verify repair.
TEST #3b: Drive System – Motor
This test checks the motor, motor windings,
wiring, and start capacitor.
NOTE: Refer to Figure 5, "PSC Motor Strip
Circuit" on page 15 for tests and measurements.
IMPORTANT: Drain water from tub before
accessing bottom of washer.
1. Check the motor and electrical connections
by performing the Gentle or Heavy Agitation
test under Manual Test Mode on page 9. The
following steps assume that this step was
unsuccessful.
Pin 2
120VAC
Motor
Pin 7
Shifter Switch
Pin 6
Optical
Sensor
DO NOT REMOVE OR DESTROY
Main Control
J16-2 J7-3
Shifter Position
J2-1
Input
J2-2
RPM Input
N