Pinpoint Tests AG: The Message Center Is Not Operating Correctly

Instrumentation, Message Center and Warning Chimes

Pinpoint Tests

Pinpoint Test AG: The Message Center Is Not Operating Correctly

Normal Operation

The message center display is located below the speedometer in the Instrument Cluster (IC). The message center functionality is controlled through the message center switches, which are hardwired to the IC through circuits 1410 (TN/OG) and 1411 (GY/OG). The message center switches use a different resistance value for each switch, allowing the IC to determine which switch is pressed.

This pinpoint test is intended to diagnose the following:

- Message center switch concern
- IC



PINPOINT TEST AG: THE MESSAGE CENTER IS NOT OPERATING CORRECTLY

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AG1 CHECK THE MESSAGE CENTER DISPLAY OPERATION USING THE SCAN TOOL


- Ignition ON.
- Enter the following diagnostic mode on the scan tool: IC DataLogger.
- Select the IC display segment (SEGMENTS 2) active command. Command the display segments on while observing the message center display.
- Does the message center display illuminate all segments?

Yes
The system is OK. If the SET, INFO or RESET buttons are inoperative, Go To Pinpoint Test AH. Pinpoint Tests AH: The Message Center Switch Does Not Operate Correctly

No
INSTALL a new IC. REFER to Instrument Cluster (IC) Instrument Cluster (IC). TEST the system for normal operation.

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