Ford ST1137-A, Manual

Page: 10 / 43

413-01-10 413-01-10 Instrument Cluster
DIAGNOSIS AND TESTING (Continued)
Symptom Chart (Continued)
Condition Possible Sources Action
• No communication with the • Central junction box (CJB) • GO to Pinpoint Test A .
instrument cluster fuse(s):
— 11 (15A).
— 21 (5A).
— 34 (20A).
•
Circuitry.
• Standard corporate protocol
(SCP) network.
• Instrument cluster.
•
Incorrect fuel gauge
•
Circuitry.
•
GO to Pinpoint Test B .
indication • Fuel pump module assembly.
•
Instrument cluster.
• Incorrect oil pressure gauge • Circuitry. • GO to Pinpoint Test C .
indication
•
Engine oil pressure switch.
• Instrument cluster.
•
Incorrect temperature gauge
•
Circuitry.
•
GO to Pinpoint Test D .
indication • Engine coolant temperature
sensor.
• Powertrain control module
(PCM).
• Instrument cluster.
•
Incorrect voltage gauge
•
Circuitry.
•
GO to Pinpoint Test E .
indication—except Cobra • Generator.
•
Standard corporate protocol
(SCP) network.
•
Instrument cluster.
• Incorrect tachometer • Standard corporate protocol • GO to Pinpoint Test F .
indication (SCP) network.
• Powertrain control module
(PCM).
• Instrument cluster.
•
Incorrect boost gauge
•
Pressure line.
•
GO to Pinpoint Test G .
indication—Cobra only • Instrument cluster.
•
The LOW FUEL warning
•
LOW FUEL warning
•
GO to Pinpoint Test H .
indicator is never/always on indicator bulb.
•
Standard corporate protocol
(SCP) network.
•
Instrument cluster.
• Oil gauge reads normal with • Instrument cluster. • INSTALL a new instrument
engine off cluster. REFER to Instrument
Cluster in this section. TEST
the system for normal
operation.
•
The speedometer is
•
Standard corporate protocol
•
GO to Pinpoint Test I .
inoperative (SCP) network.
•
Powertrain control module
(PCM).
•
Instrument cluster.
• The odometer is inoperative • Circuitry. • GO to Pinpoint Test J .
•
Powertrain control module
(PCM).
•
Instrument cluster.
2003 Mustang, 8/2002