Symptom Chart
Symptom Chart: Anti-Lock Brake System (ABS) and Stability Control
Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. REFER to: Diagnostic Methods (100-00 General Information, Description and Operation).
Symptom Chart
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 (418-00 Module Communications Network, Diagnosis and Testing). |
The brake warning indicator is always or never on | Parking brake applied Low brake fluid level Brake fluid level sensor Parking brake switch Brake booster vacuum sensor IPC concern ABS concern | RETRIEVE all ABS module Diagnostic Trouble Codes (DTCs) and GO to the DTC Chart: ABS Module. If there are no Diagnostic Trouble Codes (DTCs) present in the ABS module, DIAGNOSE the warning indicator. REFER to: Instrumentation, Message Center and Warning Chimes (413-01 Instrumentation, Message Center and Warning Chimes, Diagnosis and Testing). |
The ABS warning indicator is always or never on | IPC concern ABS or stability control concern | RETRIEVE all ABS module Diagnostic Trouble Codes (DTCs) and GO to the DTC Chart: ABS Module. If there are no Diagnostic Trouble Codes (DTCs) present in the ABS module, DIAGNOSE the warning indicator. REFER to: Instrumentation, Message Center and Warning Chimes (413-01 Instrumentation, Message Center and Warning Chimes, Diagnosis and Testing). |
The stability-traction control indicator (sliding-car icon) is never or always on | IPC concern ABS or stability control concern | RETRIEVE all ABS module Diagnostic Trouble Codes (DTCs) and GO to the DTC Chart: ABS Module. If there are no Diagnostic Trouble Codes (DTCs) present in the ABS module, DIAGNOSE the warning indicator. REFER to: Instrumentation, Message Center and Warning Chimes (413-01 Instrumentation, Message Center and Warning Chimes, Diagnosis and Testing). |
ABS false activation, ABS too sensitive, ABS activates on normal stop | Front or rear suspension concern | ELIMINATE the front and rear suspension as the cause of the problem. REFER to: Suspension System (204-00 Suspension System - General Information, Diagnosis and Testing). |
RCM mounting | CONFIRM the RCM is mounted correctly. REFER to: Restraints Control Module (RCM) (501-20B Supplemental Restraint System, Removal and Installation). |
2016 Mustang workshop publication supplied to Mustang Atlas. Original technical text and illustrations; HTML formatting by Mustang Atlas. Source page numbering is retained for traceability. Follow the configuration, revision, warnings, and cross-references in the material. About this edition.