Lit. No. 30118, Rev. 00
June 15, 2020
74
TROUBLESHOOTING
SOLENOID COIL ACTIVATION TEST (SCAT), continued
8. Turn the snowplow control ON and perform a
Solenoid Coil Activation Test (SCAT) for each
control function. Refer to the table for solenoid
numbers and functions.
NOTE: The green LED on the diagnostic
harness will illuminate when the motor relay
function is activated. This light only tests the
plow module's motor relay output.
NOTE: If a control function times out before
the desired coil activation is complete, release
the button and press it again (hand-held
control), or release the lever to the center
position, then move it back into the desired
function (joystick control).
S5C1
S5C2
S6C2
S6C1
S1
S4
S3
Control Function
Solenoid Coil(s) Activated
Raise
S2C1, S4, motor relay
Lower/Float
S1, S4
Angle Right
S3, S5C2, motor relay
Angle Left
S3, S5C1, motor relay
R Wing Extend
S6C1, motor relay
R Wing Retract
S6C2, motor relay
L Wing Extend
S5C2, motor relay
L Wing Retract
S5C1, motor relay
Scoop
S5C2, S6C1, motor relay
Vee
S5C1, S6C2, motor relay
9. After completing the SCAT, turn the snowplow
control OFF.
O
ff
-Truck Testing:
Disconnect the 12V power
source.
On-Truck Testing:
Turn the vehicle ignition
OFF. Disconnect the snowplow and vehicle
battery cables.
10. Perform any required repairs and retest as
needed.
11. When testing is completed, disconnect the
power source or the snowplow and vehicle
battery cables as described in Step 9 before
unplugging the diagnostic harness. Plug the
snowplow connectors back into ports A and B
of the plow module.
12. Replace the hydraulic unit covers.
After On-Truck Testing:
Reconnect the
snowplow and vehicle battery cables.
