Ford Mustang (1999-2004) Service Manual: Communications Network (Diagnosis and Testing)
Refer to Wiring Diagrams Cell 14 , Multiplex Communication Network for schematic and connector information.
Special Tool(s)
![]() |
73 Digital Multimeter or equivalent 105-R0051 |
![]() |
Worldwide Diagnostic System (WDS) 418-F224, New Generation STAR (NGS) Tester 418-F052, or equivalent diagnostic tool |
Module Communications Network
General Specifications
Communications Network
Module Communications Network
...
Principles of Operation
The vehicle has two module communications networks. The standard
corporate protocol (SCP) which
is an unshielded twisted pair cable (data bus plus, Circuit 914 [TN/OG] and
data bus minus, Circuit ...
Other materials:
Pinpoint Tests
PINPOINT TEST A: THE ENGINE DOES NOT CRANK AND THE
RELAY DOES CLICK
Test Step
Result / Action to Take
A1 CHECK THE VOLTAGE TO THE STARTER RELAY
YesGO to A2 .
No
REPAIR circuit 1050 (LG/VT) for an open. TEST the
system for normal operation. ...
General operating tips
Manual Climate Control
• To reduce fog build-up on the windshield during humid weather, select
Defrost. You can also improve clearing by increasing the temperature
and fan speed.
• To reduce humidity build-up inside the vehicle, do not drive with the
syste ...
Preliminary Inspection
The following items must be checked prior to beginning the diagnostic
procedures:
Know and Understand the Concern
In order to correctly diagnose a concern, first understand the
customer complaint or condition.
Customer contact may be required in ord ...


