DTC 112-01

DTC 112-01: Central Processing Unit (CPU) Internal Circuit Malfunction

1. Turn the ignition switch ON (II).
2. Clear the DTC with the HDS.
3. Turn the ignition switch OFF.
4. Disconnect the VSA modulator-control unit 37P connector.
5. Measure voltage between VSA modulator-control unit 37P connector terminal No. 13 and body ground.





Is there battery voltage?

YES - Go to step 6.

NO - Check the battery and troubleshoot the alternator regulator circuit.

6. Measure voltage between VSA modulator-control unit 37P connector terminal No. 28 and body ground.





Is there 0 V?

YES - Go to step 7.

NO - Repair Short to power in the wire between the No. 18 (15 A) in the under-dash fuse/relay box and the VSA modulator-control unit.

7. Turn the ignition switch ON (II).
8. Measure voltage between VSA modulator-control unit 37P connector terminal No. 28 and body ground.





Is there battery voltage?

YES - Check for loose terminals in the VSA modulator-control unit 37P connector. If necessary, substitute a known-good VSA modulator-control unit and retest.

NO - Repair open in the wire between the No. 18 (15 A) fuse in the under-dash fuse/relay box and the VSA modulator-control unit.