Ford 2003 Mustang Workshop Manual page 3288

K11 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 L: INACCURATE SPEEDOMETER READING
Test Step
L1 CHECK SPEEDOMETER OPERATION
Connect the diagnostic tool.
Key in ON position.
Enter the following diagnostic mode on
the diagnostic tool: Instument Cluster
Active Command.
Trigger the instrument cluster active
command SPDOMETER. Scroll to 0%,
50%, and 100%.
Did the speedometer display read 0 at
0%, half the speedometer display at
50%, and the full speedometer display
at 100%?
L2 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 M: THE O/D OFF INDICATOR IS NEVER ON
Concern may have been
caused by a loose or
corroded connector. CLEAR
the DTCs. REPEAT the self-
test.
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 Take
Yes
REFER to the Powertrain Control/Emissions
Diagnosis (PC/ED) manual.
No
GO to L2 .
Yes
INSTALL a new instrument cluster. REFER to
Instrument Cluster in this 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.
in this