VSA System
DTC 83: PCM1. Turn the ignition switch ON (II).
2. Check for other DTCs with the HDS.
Is DTC 86 indicated?
YES - Do the troubleshooting for DTC 86. DTC 86
NO - Go to step 3.
3. Clear the DTC with the HDS.
4. Turn the ignition switch OFF, then disconnect the HDS.
5. Test-drive the vehicle.
6. Check for DTCs with the HDS.
Is DTC 83 indicated?
YES - Go to step 7.
NO - Intermittent failure, the system is OK at this time.
7. Check for fuel and emissions systems DTCs with the HDS.
Are any DTCs indicated?
YES - Do the applicable troubleshooting for the PCM.
NO - Go to step 8.
8. Check the VSA system for DDTs with the HDS.
Is DTC 83 indicated and no PCM's DTC?
YES - Substitute a known-good PCM, and recheck. If the code returns, check for loose terminals in the VSA modulator-control unit 47P connector. If necessary, substitute a known-good VSA modulator-control unit, and retest.
NO - Intermittent failure, the system is OK at this time.