Pre-Diagnosis Inspection

Visually inspect ABS components for possible cause of anti-lock problem. Visual inspection may help identify cause of simple malfunction. Ensure ABS warning light is functioning properly. See TROUBLE SHOOTING  .

ABS warning light illuminates under the following conditions:

• Vehicle operated on snow or ice with parking brake activated, or a dragging brake at one wheel.
• Tire size is changed from original size.
• Tires with different traction characteristics are used on same axle.
• Vehicle is jacked up and drive wheels spin at 18.6 MPH or more for 80 seconds or more (2WD models only) with ignition on, or drive wheels spin at 7.4 MPH or more for 20 seconds or more when in 2WD model (4WD models only) with ignition on. Diagnostic Trouble Codes (DTCs) 11 and 12 will set in ABS control module memory. Clear DTCs from memory.
• Low battery voltage.

If ABS warning light illuminates because of these conditions, turn ignition off, then back on. ABS warning light will go out and no DTCs for described conditions will be stored in ABS control module memory.

If ABS warning light does not go out when ignition is turned on, and repairs are complete, drive vehicle faster than 6.2 MPH. Verify DTCs do not exist after ABS warning light goes out.