Pinpoint Test Aa: The Message Center Is Not Operating Correctly; Pinpoint Test Ab: The Message Center Switch Does Not Operate Correctly - Ford Mustang 2005 Workshop Manual

2005 Mustang Workshop Manual
Z4 CHECK FOR CORRECT INSTRUMENT CLUSTER OPERATION
Disconnect all instrument cluster connectors.
Check for:
corrosion
damaged pins
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 AA: The Message Center Is Not Operating Correctly

Normal Operation
The message center display is located below the speedometer in the instrument cluster. The message center functionality is controlled through the message center switches, which are
hardwired to the instrument cluster through circuit 1410 (TN/OG) and circuit 1411 (GY/OG). The message center switches uses a different resistance value for each switch, allowing the
instrument cluster to determine which switch is pressed.
Possible Causes
instrument cluster
PINPOINT TEST AA: THE MESSAGE CENTER IS NOT OPERATING CORRECTLY
AA1 CHECK THE MESSAGE CENTER DISPLAY OPERATION USING THE DIAGNOSTIC
TOOL
Ignition ON.
Enter the following diagnostic mode on the scan tool: Instrument Cluster Active
command.
Select the instrument cluster display segment control active command and trigger the
display segments active command on. Observe the message center display.
Does the message center display illuminate all segments?
AA2 CHECK FOR CORRECT INSTRUMENT CLUSTER OPERATION
Disconnect the instrument cluster connector.
Check for:
corrosion
pushed-out pins
Connect the instrument cluster connector and make sure it seats correctly.
Operate the system and verify the concern is still present.
Is the concern still present?

Pinpoint Test AB: The Message Center Switch Does Not Operate Correctly

Normal Operation
The message center switch assembly uses circuit 1411 (GY/OG) and circuit 1410 (TN/OG) to communicate the requested switch function to the message center.
Possible Causes
circuit 1410 (TN/OG) open, short to ground, or short to voltage
circuit 1411 (GY/OG) open, short to ground, or short to voltage
message center switch
instrument cluster
PINPOINT TEST AB: THE MESSAGE CENTER SWITCH DOES NOT OPERATE CORRECTLY
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
AB1 RETRIEVE THE RECORDED INSTRUMENT CLUSTER DTCs FROM BOTH THE CONTINUOUS AND ON-
DEMAND SELF-TESTS
Check the recorded instrument cluster DTCs from the continuous and on-demand self-test.
Are any instrument cluster DTCs recorded?
AB2 CHECK THE INSTRUMENT CLUSTER PID FOR THE MESSAGE CENTER SWITCH USING THE DIAGNOSTIC
TOOL
Ignition ON.
Enter the following diagnostic mode on the scan tool: Instrument Cluster PID.
Select and monitor the instrument cluster message center switch PID while pressing each message center switch
(INFO, SETUP, and RESET).
Does the PID agree with the switch position?
AB3 CHECK CIRCUIT 1410 (TN/OG) FOR AN OPEN AND A SHORT TO GROUND
Ignition OFF.
Disconnect: Instrument Cluster C220.
Disconnect: Message Center Switch C253.
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Yes
INSTALL a new instrument cluster. REFER to
the system for normal operation.
No
The system is operating correctly at this time. The concern may have been caused by a
loose or corroded connector.
Test Step
Test Step
Instrument Cluster (IC)
Result / Action to Take
Yes
The system is OK. If the SET, INFO or RESET buttons are inoperative,
Pinpoint Test AB.
No
GO to AA2.
Yes
INSTALL a new instrument cluster. REFER to
section. TEST the system for normal operation.
No
The system is operating correctly at this time. The concern may have been caused
by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.
Result / Action to Take
Yes
If DTC B1205, GO to AB3.
For all other instrument cluster DTCs, REFER to
Section 419-10.
No
GO to AB2.
Yes
GO to AB6.
No
GO to AB3.
Yes
GO to AB4.
Page 36 of 40
in this section. TEST
GO to
Instrument Cluster (IC) in this
11/14/2009