B1657

Diagnostic Chart:

CIRCUIT DESCRIPTION
DTC B1657 indicates that the option bit portion of the instrument cluster EEPROM has an unrecoverable error. The option bit portion of the instrument cluster EEPROM stores the manufacturing information.

CONDITIONS FOR SETTING THE DTC
DTC B1657 sets when the instrument cluster detects an error in the option bit portion of the EEPROM during a diagnostic system self-test

ACTION TAKEN WHEN THE DTC SETS
When DTC B1657 sets, the following actions may occur:
^ The instrument cluster display does not operate
^ The instrument cluster illuminates the SERVICE VEHICLE SOON indicator.

DIAGNOSTIC AIDS
Replace the instrument cluster. The EEPROM is not serviceable.