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

NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information. (See General Troubleshooting Information ).

* : Any two-character subcode (Except DTC 81-11, 81-51, and 81-52).

Turn the ignition switch to ON (II).
Clear the DTC with the HDS.
Turn the ignition switch to LOCK (0), then turn it to ON (II) again.
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 81-11, 81-51, 81-52: CENTRAL PROCESSING UNIT (CPU) INTERNAL CIRCUIT MALFUNCTION; CENTRAL PROCESSING UNIT (CPU) INTERNAL CIRCUIT MALFUNCTION; 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. Refer to intermittent failures troubleshooting (see INTERMITTENT FAILURES ).