DTC Troubleshooting: 81-01, 81-02, 81-03, 81-05, 81-06, 81-07, 81-08, 81-12, 81-13, 81-14, 81-21, 81-22, 81-23, 81-31, 81-32, 81-33, 81-35, 81-36, 81-37, 81-38, 81-40, 81-41, 81-42, 81-61, 81-71, 81-80, 81-3A, 81-3C

DTC 81-xx*:

Central Processing Unit (CPU) Internal Circuit Malfunction

*:	Subcode (Except DTC 81-11, 81-51, 81-52, 81-53, 81-54, 81-55, 81-56, 81-57, 81-58, 81-59, 81-3D, and 81-3E)

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, 81-52, 81-53, 81-54, 81-55, 81-56, 81-57, 81-58, 81-59, 81-3D, or 81-3E is indicated at the same time, do the DTC 81-11, 81-52, 81-54, 81-56, or 81-58 troubleshooting, DTC 81-51, 81-53, 81-55, or 81-57 troubleshooting, or DTC 81-59, 81-3D, or 81-3E troubleshooting. If DTC 81-11, 81-51, 81-52, 81-53, 81-54, 81-55, 81-56, 81-57, 81-58, 81-59, 81-3D, or 81-3E is not indicated. Check for loose terminals in the VSA modulator-control unit 37P connector. If necessary, substitute a known-good VSA modulator-control unit and retest.n NO - Intermittent failure, the system is OK at this time. Check for loose terminals at the VSA modulator-control unit 37P connector. Refer to intermittent failures troubleshooting.n