DTC 81-xx*: Central Processing Unit (CPU) Internal Circuit Malfunction

* : Subcode (Except DTC 81-11, 81-51, and 81-52)

1. Turn the ignition switch ON (II).
2. Clear the DTC with the HDS.
3. Turn the ignition switch OFF, then turn it ON (II) again.
4. Check for DTCs with the HDS.

   Is DTC 81-xx indicated? 

   YES  -If the DTC 81-11, 81-51, or 81-52 is indicated at the same time, do the DTC 81-11,81-51, or 81-52 troubleshooting (see DTC 81-XX*: CENTRAL PROCESSING UNIT (CPU) INTERNAL CIRCUIT MALFUNCTION ). If DTC 81-11, 81-51, or 81-52 is not indicated, replace the ABS modulator-control unit (see ABS MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION ), and retest.

   NO  -Intermittent failure, the system is OK at this time.