DTC Troubleshooting: 83

DTC 83:  ECM/PCM Communication

1.Check the DTC.

Is DTC 86 indicated?


YES - Do the troubleshooting for DTC 86.n


NO - Go to 2.


2.Clear the DTC.

3.Test-drive the vehicle.

Do the VSA and VSA activation indicators come on, and is DTC 83 indicated?


YES - Go to 4.


NO - The system is OK at this time.n


4.Check the PGM-FI system.

Does the MIL indicator come on or is the ECM/PCM's DTC indicated?


YES - Do the applicable troubleshooting for the ECM/PCM.n


NO - Go to 5.


5.Clear the DTC.

6.Test-drive the vehicle.

Is DTC 83 indicated? and no ECM/PCM's DTC?


YES - Replace the VSA modulator-control unit.n


NO - The system is OK at this time.n