Communications Network — 2016 workshop reference 5901

The DSP communicates on the HS-CAN3 and communicates with the diagnostic scan tool through the HS-CAN2. Diagnostic messages are sent/received through the HS-CAN2 circuits at the DLC, and are translated through the GWM to the HS-CAN3.

Possible Sources

Fuse Wiring, terminals and connector DSP

Visual Inspection and Diagnostic Pre-checks

Verify BCM fuse 27 (30A) is OK.

PINPOINT TEST P : THE DSP (AUDIO DIGITAL SIGNAL PROCESSING MODULE) DOES NOT

RESPOND TO THE DIAGNOSTIC SCAN TOOL

P1 CHECK THE DSP (AUDIO DIGITAL SIGNAL PROCESSING MODULE) VOLTAGE SUPPLY CIRCUIT FOR AN OPEN

Ignition OFF. Disconnect: DSP C2385B. Ignition ON. Measure:

Click to display connectors

Positive Lead	Measurement / Action	Negative Lead
C2385B-14		Ground

Are the voltages greater than 11 volts?

Yes	GO to P2
No	VERIFY the BCM fuse 27 (30A) is OK. If OK, REPAIR the circuit. If not OK, REFER to the Wiring Diagrams manual to identify the possible causes of the circuit short.

P2 CHECK THE DSP (AUDIO DIGITAL SIGNAL PROCESSING MODULE) GROUND CIRCUIT FOR AN OPEN

Ignition OFF. Measure:

Click to display connectors

Positive Lead	Measurement / Action	Negative Lead
C2385B-11		Ground

Are the resistances less than 3 ohms?

Yes	GO to P3
No	REPAIR the circuit.

P3 CHECK THE HS-CAN3 (HIGH SPEED-CONTROLLER AREA NETWORK 3) CIRCUITS BETWEEN THE DSP (AUDIO DIGITAL SIGNAL PROCESSING MODULE) AND THE GWM (GATEWAY MODULE A) FOR AN OPEN

Source reference 5901

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.