Ford 2003 Mustang Workshop Manual page 3281

Check for:
corrosion
pushed-out pins
Connect all instrument cluster connectors and make sure they
seat correctly.
Operate the system and verify the concern is still present.
Is the concern still present?
PINPOINT TEST D: INCORRECT TEMPERATURE GAUGE
INDICATION
Test Step
D1 CARRY OUT THE INSTRUMENT CLUSTER
ENGINE COOLANT TEMPERATURE GAUGE
ACTIVE COMMAND
Connect the diagnostic tool.
Key in ON position.
Enter the following diagnostic mode on the
diagnostic tool: Instrument Cluster Active
Command.
Trigger instrument cluster active command
ENGCOOLNT. Monitor the engine coolant
temperature gauge while adjusting the
ENGCOOLNT active command to read 50%
and 100%.
Does the temperature gauge start at cold,
move to half at 50%, and full hot at 100%?
D2 CHECK FOR CORRECT INSTRUMENT
CLUSTER OPERATION
Disconnect all instrument cluster connectors.
Check for:
corrosion
pushed-out pins
Connect all instrument cluster connectors and
make sure they seat correctly.
Operate the system and verify the concern is
still present.
Is the concern still present?
PINPOINT TEST E: INCORRECT VOLTAGE GAUGE INDICATION—
EXCEPT COBRA
E1 CHECK THE INSTRUMENT CLUSTER
Test Step
instrument cluster.
REFER to
Cluster
TEST the system for
normal operation.
No
The system is
operating correctly at
this time. Concern may
have been caused by a
loose or corroded
connector. CLEAR the
DTCs. REPEAT the
self-test.
Result / Action to Take
Yes
REFER to the Powertrain
Control/Emissions Diagnosis (PC/ED)
manual.
No
GO to D2 .
Yes
INSTALL a new instrument cluster.
REFER to Instrument Cluster
section. TEST the system for normal
operation.
No
The system is operating correctly at this
time. Concern may have been caused by
a loose or corroded connector. CLEAR the
DTCs. REPEAT the self-test.
Result / Action to
Instrument
in this section.
in this
Take