Without Scan Tool

MOTOR ROTATION
The scan tool will rotate the motors in one direction, then the other.

NOTE:
^ If any motor does not turn in both directions, the motor pack is malfunctioning and must be replaced. Refer to Hydraulic Modulator/Master Cylinder Assembly.

^ If all three motors rotate, try to rotate each gear on the hydraulic modulator, refer to No Gear Movement.

NO GEAR MOVEMENT
After the motor pack has been removed, rotate each gear by hand on the hydraulic modulator. The front gears (non-center gears) should be able to be rotated approximately 8.75 full turns, lock to lock. If the gear does not turn freely or at least 8.5 turns are not possible, replace the hydraulic modulator. The rear gear should rotate approximately 3.75 turns. If the middle gear does not turn freely or at least 3.5 turns are not possible, replace the hydraulic modulator.