Ford 2003 Mustang Workshop Manual page 3527

tool — instrument cluster
The module does not
respond to the diagnostic
tool — powertrain control
module (PCM)
No module/network
communication — ISO 9141
network
No module/network
communication — SCP
network
No module/network
communication — no power
to the diagnostic tool
Pinpoint Tests
CAUTION: Be careful when probing the CJB, battery junction box (BJB) or any
connectors. Damage will result to the connector receptacle if the probe or terminal being used
is too large.
CAUTION: Electronic modules are sensitive to static electrical charges. If exposed to
these charges, damage may result.
NOTE: If DTCs are recorded and the symptom is not present when carrying out the pinpoint tests, an
intermittent concern may be the cause. Always check for loose connections and corroded pins.
PINPOINT TEST A: THE MODULE DOES NOT RESPOND TO THE
DIAGNOSTIC TOOL — ANTI-LOCK BRAKE CONTROL MODULE
A1 CHECK THE VEHICLE FOR TRACTION CONTROL
Check the vehicle for a traction control disable switch.
Is a traction control disable switch present?
A2 CHECK ANTI-LOCK BRAKE CONTROL MODULE C141
FOR DAMAGE
Key in OFF position.
Disconnect: Anti-Lock Brake Control Module C135.
Inspect the anti-lock brake control module C135 for
damage; repair as necessary.
Connect: Anti-Lock Brake Control Module C135.
Connect the diagnostic tool.
Key in ON position.
Enter the following diagnostic mode on the diagnostic
tool: Diagnostic Data Link.
Instrument cluster.
Wire or connection in SCP
communication network.
PCM.
Wire or connection in ISO
9141 communication
network.
ISO 9141 networked
modules.
Wire or connection in SCP
communication network.
SCP networked modules.
CJB Fuse 31 (5A).
DLC pins.
Scan tool.
Circuitry.
Test Step
Test D .
GO to
Pinpoint
Test E .
GO to
Pinpoint
Test F .
GO to
Pinpoint
Test G .
GO to
Pinpoint
Test H .
Result / Action to Take
Yes
GO to A2 .
No
GO to A9 .
Yes
GO to A3 .
No
GO to A6 .