Ford 2003 Mustang Workshop Manual page 3556

B2139 PCM ID Does Not Match Between Instrument Cluster and
PCM
B2141 NVM Configuration Failure (No PCM ID Exchange
Between Instrument Cluster and PCM)
B2143 NVM Memory Failure
C1284 Oil Pressure Switch Failure
U1147 SCP Invalid or Missing Data for Vehicle Security
U1262 Missing SCP Message
Symptom Chart
Symptom Chart
Condition
No communication
with the instrument
cluster
The anti-theft
indicator is
always/never on —
no three second
theft indicator prove
out
The vehicle does not
start — theft
indicator proves out
for three seconds as
normal
Possible Sources
Central junction box
Fuses:
5 (15A)
21 (5A)
34 (20A)
Circuitry
Instrument cluster
Instrument cluster
Theft indicator
Less than two keys
programmed to the
system
Transceiver not
connected/defective
Circuitry
Transceiver internal
antenna damaged
NON-PATS key,
damaged key or no
code received
Partial key read of
PATS key
Unprogrammed
PATS key
No PCM ID stored in
PATS
PATS/PCM ID do not
match
Problem with SCP
link
ICM GO to
Test J
ICM GO to
Test K
ICM REFER to
Section 413-01
ICM REFER to
Section 413-01
PCM/SCP GO to
Test C
J1850 REFER to
Section 418-00
Action
GO to Pinpoint Test A .
GO to Pinpoint Test B .
CARRY OUT Instrument
Cluster On-Demand
Self-Test. RETRIEVE
DTCs. If DTCs are
present, GO to
Instrument Cluster
Diagnostics Trouble
Code (DTC) Index. If no
DTCs are retrieved,
CHECK for other
possible no-start
causes.
CLEAR the stored
DTCs. CYCLE the
ignition key from OFF to
RUN. RETRIEVE
continuous DTCs. If
DTCs are present, GO
to Instrument Cluster
Diagnostics Trouble
Code (DTC) Index. If no
Pinpoint
.
Pinpoint
.
.
Pinpoint
.
.