Symptom Chart
WARNING: This page is about a different car, the 2015 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.
Symptom Chart: Anti-Lock Brake System (ABS) and Stability Control
Diagnostics in this article assume a certain skill level and knowledge of Ford-specific diagnostic practices. REFER to: Diagnostic Methods .
Symptom Chart: ABS and Stability Control
| Condition | Possible Sources | Actions |
|---|---|---|
| A module does not respond to the diagnostic scan tool | Fuse Wiring, terminals or connectors ABS module concern |
REFER to: Communications Network . |
| The brake warning indicator is always or never on | Low brake fluid level Brake fluid level sensor Parking brake applied Parking brake switch IPC concern ABS concern |
RETRIEVE and DIAGNOSE all ABS module Diagnostic Trouble Codes (DTCs). If there are no ABS module Diagnostic Trouble Codes (DTCs), DIAGNOSE the brake warning indicator. REFER to: Instrumentation, Message Center and Warning Chimes . |
| The ABS warning indicator is always or never on | IPC concern ABS concern |
RETRIEVE and DIAGNOSE all ABS module Diagnostic Trouble Codes (DTCs). If there are no ABS module Diagnostic Trouble Codes (DTCs), DIAGNOSE the ABS warning indicator. REFER to: Instrumentation, Message Center and Warning Chimes . |
| The stability-traction control OFF indicator (sliding-car OFF icon) is always on | IPC concern ABS concern |
RETRIEVE and DIAGNOSE all ABS module Diagnostic Trouble Codes (DTCs). If there are no ABS module Diagnostic Trouble Codes (DTCs), DIAGNOSE the stability-traction control OFF indicator. REFER to: Instrumentation, Message Center and Warning Chimes . |
| ABS false activation, ABS too sensitive, ABS activates on normal stop | Front or rear suspension concern | ELIMINATE the front or rear suspension as the cause of the problem. REFER to: Suspension System . |
| RCM mounting | CONFIRM the RCM is mounted correctly. REINSTALL as necessary. REFER to: Restraints Control Module (RCM) . | |
| Loose wheel speed sensor or excessive air gap | INSPECT wheel speed sensors for looseness or excessive air gap. TIGHTEN or INSTALL new as necessary. REFER to: Front Wheel Speed Sensor . REFER to: Rear Wheel Speed Sensor . | |
| Rear wheel speed sensor tone ring or front wheel bearing damaged, rusted or contaminated with foreign material | INSPECT the rear tone rings and front wheel bearings for damage, rust and foreign material. CLEAN, REMOVE foreign material or INSTALL new as necessary. For the front wheel bearing, REFER to: FRONT WHEEL BEARING AND WHEEL HUB - RWD . REFER to: Front Wheel Bearing and Wheel Hub - 4WD . For the rear tone rings, REFER to: Axle Shaft - Vehicles With: Ford 8.8 Inch Ring Gear, . REFER to: Axle Shaft - Vehicles With: Ford 9.75 Inch Ring Gear . | |
| Parking brake shoes out of adjustment (dragging) | CHECK and if necessary, ADJUST the parking brake. REFER to: Parking Brake Shoe Adjustment . | |
| The traction control system is inoperative or cannot be disabled | Refer to the Pinpoint Test | GO to Pinpoint Test K |
| The Hill Descent Control™ system is inoperative or cannot be disabled | Refer to the Pinpoint Test | GO to Pinpoint Test S |