If a motor circuit is open, ABS will be disabled and the antilock telltale lamp will be turned On.

Code 56 sets if:

LF motor circuit is open.

This code will set at all times except when a previous failure has disabled ABS operation.

When attempting to diagnose an intermittent problem, use the Scan tool to review supplemental diagnostic information. The supplemental data can be used to duplicate a problem.

Select Malf History from scan tool ABS menu.

Check the tightness of the female terminal grip with a spare male terminal.

Motor resistance is less than 2 ohms.