Circuit Description
The EEPROM write error detection is handled inside the control module. No external circuits are involved.
Conditions for Running the DTC
The microprocessor runs the program to detect a write error whenever it writes to the EEPROM. The only requirements are voltage and ground. This program runs even if the voltage is out of the valid operating range.
Conditions for Setting the DTC
The microprocessor first writes information to a cell, or address, in the EEPROM. The microprocessor then reads the information and compares the information to what was sent to the address. If they do not match after three consecutive attempts, the microprocessor sets this DTC.
Action Taken When the DTC Sets
| • | The OPTIONS NOT SET message is displayed on the DIC. |
| • | The microprocessor finds another area to write the information to. This new area becomes the permanent area for storage of this information. |
Conditions for Clearing the MIL/DTC
The DTC clears when the microprocessor makes a successful write to the EEPROM.
Diagnostic Aids
| • | This DTC may be stored as a history DTC without affecting the operation of the module. If stored only as a history DTC and not retrieved as a current DTC, do not replace the module. |
| • | If this DTC is retrieved as both a current and history DTC, replace the module. |
Step | Action | Yes | No |
|---|---|---|---|
1 | Did you perform the Instrument Cluster Diagnostic System Check? | Go to Step 2 | |
2 |
Important: Program the replacement IPC. Replace the IPC. Refer to Instrument Cluster Replacement . Did you complete the replacement? | Go to Step 3 | -- |
3 |
Does the DTC reset? | Go to Step 2 | System OK |
