The O/D off indicator never/always on
Powertrain control module (PCM)
Instrument cluster
GO to Pinpoint Test I.
The check fuel cap warning indicator is never/always on
Powertrain control module (PCM)
Instrument cluster
GO to Pinpoint Test J.
The brake warning indicator is never/always on
Circuitry
Parking brake switch
Brake fluid level switch
Anti-lock brake system (ABS) module
Smart junction box (SJB)
Instrument cluster
GO to Pinpoint Test K.
The charging system warning indicator is never/always on
Powertrain control module (PCM)
Instrument cluster
GO to Pinpoint Test L.
The high beam indicator is never/always on
Smart junction box (SJB)
Instrument cluster
GO to Pinpoint Test M.
The turn signal indicator is never/always on
Smart junction box (SJB)
Instrument cluster
GO to Pinpoint Test N.
The anti-lock brake system (ABS) warning indicator is never/always on
ABS module
Instrument cluster
GO to Pinpoint Test O.
The low oil pressure warning indicator is never/always on
Circuitry
Engine oil pressure switch
Smart junction box (SJB)
Instrument cluster
GO to Pinpoint Test P.
The malfunction indicator lamp (MIL) is never/always on
Powertrain control module (PCM)
Instrument cluster
GO to Pinpoint Test Q.
The air bag warning indicator is never/always on
Circuitry
Restraint control module (RCM)
Instrument cluster
GO to Pinpoint Test R.
The speed control indicator is never/always on
Powertrain control module (PCM)
Instrument cluster
GO to Pinpoint Test S.
The powertrain malfunction (wrench) warning indicator is never/always on
Powertrain control module (PCM)
Instrument cluster
GO to Pinpoint Test T.
The failsafe cooling warning indicator is never/always on
Powertrain control module (PCM)
Instrument cluster
GO to Pinpoint Test U.
The door ajar warning indicator is inoperative/does not operate correctly
Smart junction box (SJB)
Instrument cluster.
GO to Pinpoint Test V.
The traction control indicator is never/always on
Anti-lock brake system (ABS) module
Instrument cluster
GO to Pinpoint Test W.
The daytime running lamps (DRL) indicator is never/always on
Instrument cluster
GO to Pinpoint Test X.
The instrument cluster is inoperative
Circuitry
Instrument cluster
GO to Pinpoint Test Y.
The anti-theft indicator is never/always on
PCM
Instrument cluster
GO to Pinpoint Test Z.
Symptom Chart — Information And Message Center
Condition Possible Sources Action
The message center is not operating
correctly
Instrument
cluster
GO to Pinpoint Test AA.
The message center display is blank
Instrument
cluster
PRESS the message center INFO button. If the message center display is still blank,
INSTALL a new instrument cluster. REFER to Instrument Cluster (IC) in this section.
TEST the system for normal operation.
The message center switch does not
operate correctly
Circuitry
Message
center switch
Instrument
cluster
GO to Pinpoint Test AB.
The CHECK ENGINE TEMP display does
not operate correctly
Instrument
cluster
CHECK the temperature gauge for correct operation.
If the temperature gauge does not operate correctly, GO to Pinpoint Test C.
If the temperature gauge operates correctly, INSTALL a new instrument
cluster. REFER to Instrument Cluster (IC) in this section. TEST the system for
normal operation.
The TRAC CONTROL ACTIVE display
does not operate correctly
Instrument
cluster
CHECK the traction control system for correct operation.
If the traction control system does not operate correctly, REFER to Section
206-09 to continue diagnosis of the traction control system.
If the traction control system operates correctly, INSTALL a new instrument
cluster. REFER to Instrument Cluster (IC) in this section. TEST the system for
normal operation.
The CHECK TRAC CONTROL display
does not operate correctly
Instrument
cluster
CHECK the traction control system for correct operation.
If the traction control system does not operate correctly, REFER to Section
206-09 to continue diagnosis of the traction control system.
If the traction control system operates correctly, INSTALL a new instrument
cluster. REFER to Instrument Cluster (IC) in this section. TEST the system for
normal operation.
The TURN SIGNAL ON display does not
operate correctly
Instrument
cluster
CHECK the turn signal indicators for correct operation.
If the turn signal indicators do not operate correctly, GO to Pinpoint Test N.
If the turn signal indicators operate correctly, INSTALL a new instrument
cluster. REFER to Instrument Cluster (IC) in this section. TEST the system for
normal operation.
The CHECK CHARGING SYSTEM
display does not operate correctly
Instrument
cluster
CHECK the charging system warning indicator for correct operation.
If the charging system warning indicator does not operate correctly, GO to
Pinpoint Test L.
If the charging system warning indicator operates correctly, INSTALL a new
instrument cluster. REFER to Instrument Cluster (IC) in this section. TEST the
system for normal operation.
The ENGINE FAILSAFE MODE display
Instrument
CHECK the failsafe cooling warning indicator for correct operation.
2005 Mustang Workshop Manual
http://www.fordtechservice.dealerconnection.com/pubs/content/
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