Ford 2003 Mustang Workshop Manual page 3559

Key in OFF position.
Connect the diagnostic tool.
Enter the instrument cluster active command mode.
Can the instrument cluster active command
mode be entered?
B2 TRIGGER THE ANTI-THEFT INDICATOR
Trigger the instrument cluster active command
WARNING LAMPS AND CHIME to ON.
Does the anti-theft indicator illuminate?
B3 CHECK THE ANTI-THEFT INDICATOR
Key in OFF position.
Disconnect: Anti-Theft LED.
Measure the resistance between the pins of the
anti-theft LED in both directions.
Is the resistance greater than 10,000 ohms in
one direction, and 10-20 ohms in the other
direction?
PINPOINT TEST C: THE ANTI-THEFT SYSTEM DOES NOT OPERATE
CORRECTLY — THE VEHICLE STARTS BUT FLASHES A FAULT
CODE ON THE THEFT INDICATOR AT KEY ON
Test Step
C1 CHECK THE ANTI-
THEFT INDICATOR FOR
CORRECT OPERATION
Key in START position.
Verify the theft indicator
proves out correctly.
Does the vehicle start
once the theft proves
out?
C2 CHECK THE PCM
DIAGNOSTIC CAPABILITY
Connect the diagnostic
tool.
Retrieve and document
continuous DTCs.
Enter the following
Result / Action to Take
Yes
If the vehicle starts, VERIFY correct PCM calibration for vehicle.
REFER to Powertrain Control/Emissions Diagnosis (PC/ED)
manual Section 3.
No
GO to C2 .
Yes
GO to C3 .
No
REFER to Section 418-00
Yes
GO to B2 .
No
Go To Pinpoint Test A
Yes
The anti-theft indicator is OK.
VERIFY the concern with the
customer.
No
GO to B3 .
Yes
INSTALL a new instrument cluster;
for additional information, REFER to
Section 413-01 . CYCLE the ignition
to RUN using two encoded ignition
keys. Go To Pinpoint Test J
initialize the module. REPEAT the
self-test. CLEAR the DTCs.
No
INSTALL a new anti-theft LED. For
additional information, REFER to
Section 413-01 . REPEAT the self-
test. CLEAR the DTCs.
.
.
to