Anti-Lock Brake System (ABS) and Stability Control — 2016 workshop reference 2953

Information, Diagnosis and Testing).

If the battery passed the condition test and did not require a recharge, GO to A4

No	INSTALL a new battery. REFER to: Battery (414-01 Battery, Mounting and Cables, Removal and Installation).

A4 CHECK THE ABS (ANTI-LOCK BRAKE SYSTEM) MODULE VOLTAGE (VPWR_ABS) PID (PARAMETER IDENTIFICATION)

Ignition ON. Measure and record the voltage at the battery. Using a diagnostic scan tool, monitor the VPWR_ABS PID.

Is the PID display within 0.2 volt of the recorded battery voltage?

Yes	GO to A7
No	GO to A5

A5 CHECK THE ABS (ANTI-LOCK BRAKE SYSTEM) MODULE VOLTAGE SUPPLY

Ignition OFF. Disconnect ABS module C135. Ignition ON. Measure:

Click to display connectors

Positive Lead	Measurement / Action	Negative Lead
C135-1		Ground
C135-30		Ground
C135-35		Ground

Is each voltage within 0.2 volt of the recorded battery voltage?

Yes	GO to A6
No	DISCONNECT and INSPECT C126 for corrosion, pushed-out pins, bent pins and spread terminals. REPAIR as necessary. Refer to Wiring Diagrams Cell 5 for schematic and connector information. If C126 is OK, VERIFY BJB fuses 5 (50A), 28 (30A) and 62 (5A) are OK. If OK, REPAIR the affected circuit for high resistance or an open. If not OK, REFER to the Wiring Diagrams manual to identify the cause of the circuit short.

Yes

GO to A6

DISCONNECT and INSPECT C126 for corrosion, pushed-out pins, bent pins and spread terminals. REPAIR as necessary. Refer to Wiring Diagrams Cell 5 for schematic and connector information.

If C126 is OK, VERIFY BJB fuses 5 (50A), 28 (30A) and 62 (5A) are OK. If OK, REPAIR the affected circuit for high resistance or an open. If not OK, REFER to the Wiring Diagrams manual to identify the cause of the circuit short.

A6 CHECK THE ABS (ANTI-LOCK BRAKE SYSTEM) MODULE GROUND CIRCUIT FOR AN OPEN

Ignition OFF. Disconnect the battery negative cable. REFER to: Battery Disconnect and Connect (414-01 Battery, Mounting and Cables, General Procedures). Measure:

Click to display connectors

Positive Lead	Measurement / Action	Negative Lead

Source reference 2953

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.