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 in order to detect a write error whenever the microprocessor 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 3 consecutive attempts, the microprocessor sets this DTC.
Action Taken When the DTC Sets
The microprocessor tried to write to the memory location 3 times, if the write is not accomplished, the DTC is set.
Conditions for Clearing the MIL/DTC
The DTC clears when the microprocessor makes a successful write to the EEPROM.
Diagnostic Aids
Important: The DIM must be replaced if this DTC is retrieved from the DIM as either current or history. If this DTC is retrieved from any other module as a history DTC only do not replace the module.
| • | This DTC may be stored as a history DTC with out 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 | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Did you perform the Diagnostic System Check? | -- | Go to Step 2 | |
2 | Replace the module. Refer to Control Module References . Did you complete the replacement? | -- | System OK | -- |
