GM Service Manual Online
For 1990-2009 cars only

Circuit Description

The Electrically Erasable Programmable Read Only Memory (EEPROM) is part of the printed circuit board housed within the instrument cluster. It stores variables required in the operation of the instrument cluster and in the interpretation of the incoming data and can be programmed for different instrument levels. If a DTC 24 was set as a result of interrupted instrument programming then the following diagnostic table will need to be followed. DTC 24 will set if the EEPROM checksum is incorrect. The testing of the EEPROM checksum occurs every time the ignition is turned on. The DTC is reset when the EEPROM checksum is tested as being correct. The DTC is logged as a History DTC.

Diagnostic Aids

If the programmed instrument cluster values are corrupted, reprogramming can be carried out via Tech 2 to rectify the fault .

DTC 24 - EE CHECKSUM ERROR

Step

Action

Yes

No

1

Did you perform the Instrument Cluster Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Instrument Cluster

2

  1. Install a scan tool.
  2. Turn the ignition ON, with the engine OFF.
  3. Select Diagnostics / Model Year / Vehicle Model / Body / Instrument / Program / Configuration and following the instructions to verify the configuration programming.

Is programming completed successfully?

Go to Step 3

Go to Diagnostic Starting Point - Body Control System in Body Control System

3

Replace the instrument cluster. Refer to Instrument Cluster Replacement .

Did you complete the replacement?

Go to Step 4

--

4

  1. Use the scan tool in order to clear the DTCs.
  2. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text.

Does the DTC reset?

Go to Step 2

System OK