DTC 112-01

DTC 112-01: Central Processing Unit (CPU).
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.