DTC 81-xx*: Central Processing Unit (CPU) Internal Circuit Malfunction
* : Subcode (Except DTC 81-11, 81-3D, 81-3E, 81-51, 81-52, 81-53,81-54,81-55, 81-56, 81-57, 81-58, and 81-59)
- Turn the ignition switch ON (II).
- Clear the DTC with the HDS.
- Turn the ignition switch OFF, then turn it ON (II) again.
- Check for DTCs with the HDS.
Is DTC 81-xx indicated?
YES -If the DTC 81-11, 81-3D, 81-3E, 81-51, 81-52, 81-53, 81-54, 81-55, 81-56, 81-57, 81-58, or 81-59 is indicated at the same time, do the DTC 81-11, 81-52, 81-54, 81-56, or 81-58 troubleshooting (see DTC 81-XX*: CENTRAL PROCESSING UNIT (CPU) INTERNAL CIRCUIT MALFUNCTION ), DTC 81-51, 81-53, 81-55, or 81-57 troubleshooting (see DTC 81-51: CENTRAL PROCESSING UNIT (CPU) INTERNAL CIRCUIT MALFUNCTION: DTC 81-53: CENTRAL PROCESSING UNIT (CPU) INTERNAL CIRCUIT MALFUNCTION: DTC 81-55: CENTRAL PROCESSING UNIT (CPU) INTERNAL CIRCUIT MALFUNCTION: DTC 81-57: CENTRAL PROCESSING UNIT (CPU) INTERNAL CIRCUIT MALFUNCTION ), or DTC 81-3D, 81-3E, or 81-59 troubleshooting (see DTC 81-3D: CENTRAL PROCESSING UNIT (CPU) INTERNAL CIRCUIT MALFUNCTION: DTC 81-3E: CENTRAL PROCESSING UNIT (CPU) INTERNAL CIRCUIT MALFUNCTION: DTC 81-59: CENTRAL PROCESSING UNIT (CPU) INTERNAL CIRCUIT MALFUNCTION ). If DTC 81-11, 81-3D, 81-3E, 81-51, 81-52, 81-53, 81-54, 81-55, 81-56,81-57,81-58, or 81-59 is not indicated. Replace the VSA modulator-control unit (see VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION ).
NO -Intermittent failure, the system is OK at this time.