EEPROM, Fault In Memory

Checking The Transmission Control Module
- Ignition OFF.
- Wait for about 150 seconds.
- Ignition ON.
- The EEPROM in the control module stores diagnostic trouble codes (DTC), diagnostic trouble code counters and frozen values. If the EEPROM memory is malfunctioning then no information can be read from it. To check the condition of the memory it is necessary to simulate a fault so that a diagnostic trouble code is stored and then check that the memory is working by reading off the diagnostic trouble code information.
- Remove mode selector from panel.
- Disconnect the mode selector.
- Wait for about 45 seconds.
- Reconnect the connector and reinstall the mode selector.





- Ignition OFF.
- Wait for about 150 seconds.
- Ignition ON.
- Read off OTHER DTCs.
- Is diagnostic trouble code AT-114 stored?

Yes:
- Proceed to: Erasing Diagnostic Trouble Code section below.

No:
- Proceed to: Replacing Component section below.





Erasing Diagnostic Trouble Code
- Memory performing normally. Erase diagnostic trouble code.
- Fault corrected.





Replacing Component
- Ignition OFF.
- Try a new transmission control module (TCM).
- Fault corrected.