D: C1233/C1234/C1237 - Sensor Output Failure

D: DTC'S C1233/C1234/C1237 - SENSOR OUTPUT FAILURE

Test D1-D2:

Test D2-D3:

Test D3-D4:

Test D4 (Continued):

Test D5:

Note: Any time an anti-lock brake sensor is removed, thoroughly clean the mounting surfaces. On front anti-lock brake sensors, apply High Temperature 4x4 Front Axle and Wheel Bearing Grease E8TZ-19590-A or equivalent meeting Ford Specification ESA-M1C198-A